WO1996006223A1 - Soft layered tissues having high wet strength - Google Patents

Soft layered tissues having high wet strength Download PDF

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Publication number
WO1996006223A1
WO1996006223A1 PCT/US1995/009232 US9509232W WO9606223A1 WO 1996006223 A1 WO1996006223 A1 WO 1996006223A1 US 9509232 W US9509232 W US 9509232W WO 9606223 A1 WO9606223 A1 WO 9606223A1
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WO
WIPO (PCT)
Prior art keywords
web
layer
wet
layered
fibers
Prior art date
Application number
PCT/US1995/009232
Other languages
French (fr)
Inventor
Gary Lee Shanklin
Stephen John Mc Cullough
Greg Arthur Wendt
Original Assignee
Kimberly-Clark Worldwide, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23132121&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1996006223(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kimberly-Clark Worldwide, Inc. filed Critical Kimberly-Clark Worldwide, Inc.
Priority to AU31397/95A priority Critical patent/AU683579B2/en
Priority to BR9508808A priority patent/BR9508808A/en
Priority to DE69515316T priority patent/DE69515316T2/en
Priority to JP50807096A priority patent/JP3793572B2/en
Priority to KR1019970701123A priority patent/KR970705671A/en
Priority to MX9701144A priority patent/MX9701144A/en
Priority to EP95927342A priority patent/EP0777783B1/en
Priority to PL95319018A priority patent/PL178164B1/en
Publication of WO1996006223A1 publication Critical patent/WO1996006223A1/en

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Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14Making cellulose wadding, filter or blotting paper
    • D21F11/145Making cellulose wadding, filter or blotting paper including a through-drying process
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/02Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
    • D21F11/04Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type paper or board consisting on two or more layers
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14Making cellulose wadding, filter or blotting paper

Definitions

  • tissue paper useful as facial tissue, bath tissue, paper towels and the like
  • additives include wet strength agents, which can be permanent or temporary, and debonding agents.
  • wet strength agents impart strength retention to the tissue sheet when it becomes wet by creating or retaining certain fiber-to-fiber bonds that withstand the presence of water or moisture, which is particularly useful for most tissue applications.
  • Temporary wet strength agents are especially useful for bath tissue, where wet strength is needed while the tissue is being used, but is undesirable after the tissue has been flushed into the sewer system.
  • Debonding agents are desirable for the purpose of enhancing the softness of the tissue sheet by reducing the number of papermaking bonds between fibers and enhancing the surface feel of the tissue.
  • the invention resides in a method for making a soft tissue sheet comprising (a) forming a layered wet web of papermaking fibers using a layered headbox, said layered wet web having a first outer layer, a second outer layer, and at least one inner layer, wherein the two outer layers comprise predominantly hardwood fibers and said at least one inner layer contains a wet strength agent and comprises predominantly softwood fibers, and wherein at least the first outer layer contains a debonding agent; (b) transferring the layered wet web to a throughdrying fabric wherein said second outer layer is in contact with the throughdrying fabric; and (c) throughdrying the web to form a soft tissue sheet.
  • the resulting throughdried web can be creped or uncreped.
  • the layered web of step (a) can be dried in accordance with conventional "wet-pressing" processes wherein the web is carried by a papermaking felt, pressed against the surface of a Yankee dryer, dried and creped to produce a soft tissue sheet.
  • the invention resides in a soft layered tissue comprising two outer layers and at least one inner layer, wherein said two outer layers contain predominantly hardwood fibers and at least one of the two outer layers, such as the airside layer (hereinafter described), contains a debonding agent, and wherein said at least one inner layer contains predominantly softwood fibers and a wet strength agent.
  • the tissue can be throughdried or wet-pressed and can be creped or uncreped.
  • a “debonding agent” is an additive that enhances the softness of tissue paper.
  • the debonding agents may accomplish this by a variety of means: a) by interfering with formation of hydrogen bonds, such as with fatty quaternary ammonium compounds (debonder); b) by increasing the lubricity of the fibers and increasing flexibility of the web, such as with fatty acid salts and derivatives (e.g., fatty amine derivatives) and silicones; c) reducing surface tension and thereby reducing Campbell's forces during web formation, resulting in reduced bonded area, such as with surfactants; or d) by other means or combinations of means.
  • Suitable debonding agents include, without limitation, alkyl trimethyl quaternary ammonium compounds, dialkyl dimethyl quaternary ammonium compounds, trialkyl methyl quaternary ammonium compounds, dialkoxy alkyl quaternary ammonium compounds, dialkoxy alkyl quaternary ammonium compounds, diamidoamine quaternary compounds, imidazolinium quaternary ammonium compounds, fatty acid derivatives, nonionic surfactants, ampholytic surfactants, silicones, methyl cellulose, hydroxypropyl cellulose, methyl hydroxyethyl cellulose, methyl hydroxypropyl cellulose, methyl hydroxybutyl cellulose, carboxyethylmethyl cellulose, and mixtures thereof.
  • the debonding agents are preferably incorporated into the outer layer(s) by addition into the layer furnish prior to formation of the web.
  • the debonding agents can also be applied to the wet web after formation by spraying the debonding agent onto the web, before drying of the web.
  • the consistency of the wet web can be about 40 percent or less, more specifically about 30 percent or less, and still more specifically about 20 percent or less.
  • the amount of debonding agent applied to the outer layer(s) can be from about 0.125 kg/tonne per layer (0.25 lb./ton per layer) to 25 kg/tonne per layer (50 lb./ton per layer).
  • a "wet strength agent” is an additive that increases the strength of wet tissue paper. It can provide permanent or temporary wet strength to the tissue.
  • Suitable wet strength agents include, without limitation, urea-formaldehyde resins, melamine-formaldehyde resins, epoxidized polyamide resins, polyamine- polyamide-epichlorohydrin resins, glyoxalated polyacrylamide resins, polyethylenimine resins, temporary wet strength resins described in U.S. Patent No.
  • dialdehyde starch cationic aldehyde starch, cellulose xanthate, synthetic latexes, vegetable gums, glyoxal, acrylic emulsions and a photeric starch siloxanes.
  • the amount of wet strength agent added to the inner layer of softwood fibers can be from 0.25 kg/tonne/layer (0.5 lb./ton) to 25 kg/tonne/layer (50 lb./ton).
  • FIG. 1 is a schematic flow diagram of a tissue making process useful for purposes of this invention.
  • FIG. 1 a method of making multi-layered tissues suitable for purposes of this invention will be described. (For simplicity, the various tensioning rolls schematically used to define the several fabric runs are shown but not numbered.) It will be appreciated that variations from the apparatus and method illustrated in Figure 1 can be made without departing from the scope of the invention. Shown is a twin wire former having a layered papermaking headbox 10 which injects or deposits an aqueous suspension of papermaking fibers between outer forming fabric 11 and inner forming fabric 12. Inner forming fabric 12 serves to support and carry the newly-formed wet web 13 downstream in the process as the web is partially dewatered to a consistency of about 10 dry weight percent.
  • Additional dewatering of the wet web can be carried out, such as by vacuum suction 14, while the wet web is supported by the forming fabric.
  • the dryerside layer of the wet web which is the outer layer of the web that ultimately faces the dryer surface during drying, is in contact with the forming fabric 12.
  • the airside layer is the outer layer on the opposite side of the web and faces away from the dryer during drying.
  • the wet web is then transferred from the inner forming fabric to a transfer fabric 17 traveling at a slower speed than the forming fabric in order to impart increased stretch into the web. Transfer is preferably carried out with the assistance of a vacuum shoe 18 and a kiss transfer to avoid substantial compression of the wet web.
  • Optional vacuum box 19 can be used to further dewater the web and spray applicator 20 can be used to provide controlled addition of additives such as debonders.
  • the web is then transferred from the transfer fabric 17 to the throughdrying fabric 25 with the aid of a vacuum transfer roll 26.
  • the throughdrying fabric can be traveling at about the same speed or a different speed relative to the transfer fabric. If desired, the throughdrying fabric can be run at a slower speed to further enhance stretch.
  • Transfer is preferably carried out with vacuum assistance to ensure deformation of the sheet to conform to the throughdrying fabric, thus yielding desired bulk and appearance.
  • Optional vacuum box 27 and spray applicator 28 can be used as described above.
  • the level of vacuum used for the web transfers can be from about 3 to about 15 inches of mercury (75 to 380 millimeters of mercury), preferably about 5 inches (125 millimeters) of mercury.
  • the vacuum shoe (negative pressure) can be supplemented or replaced by the use of positive pressure from the opposite side of the web to blow the web onto the next fabric in addition to or as a replacement for sucking it onto the next fabric with vacuum.
  • a vacuum roll or rolls can be used to replace the vacuum shoe(s).
  • the web While supported by the throughdrying fabric 25, the web is dried to a consistency of about 94 percent or greater by the throughdryers 30 and 31.
  • the dried basesheet 35 is transferred to carrier fabric 36 with the aid of vacuum roll 37 and transported to the reel 38 using carrier fabric 36 and an optional additional carrier fabric 39.
  • An optional pressurized turning roll 40 can be used to facilitate removal of the web from the carrier fabric 36.
  • Suitable carrier fabrics for this purpose are Albany International 84M or 94M and Asten 959 or 937.
  • Reel calender 45 or subsequent off-line calendering can be used to improve the smoothness and softness of the basesheet, if desired.
  • a pilot scale twin wire papermaking machine as described in Figure 1, was used to produce tissues in accordance with this invention. More specifically, the papermaking machine had a layered headbox with a top chamber, two central chambers, and a bottom chamber.
  • a first fibrous slurry composed primarily of short papermaking fibers, namely eucalyptus hardwood kraft (EHW ), was pumped through the top and bottom headbox chambers and, simultaneously, a second fibrous slurry composed primarily of long papermaking fibers, namely northern softwood kraft (NSWK), was pumped through the central headbox chambers and delivered in superposed relation between the inner and outer forming fabrics to form thereon a three-layered embryonic (wet) web.
  • EHW eucalyptus hardwood kraft
  • NSWK northern softwood kraft
  • the inner and outer forming fabrics were Asten 866 fabrics.
  • the EHWK fibers of the first slurry had been previously processed in a Maule shaft disperser with a power input of 80kW at a consistency of about 34% and at a temperature of about 184 * F.
  • the resulting EHWK fibers were treated with Berocell 596 debonder in the machine chest at a rate of 5 kg/tonne.
  • Berocell 596 is a dimethyl dialkyl ammonium chloride debonder supplied by Eka-Nobel. Fiber consistency of the first slurry was about 0.12%.
  • the NSWK fibers of the second slurry were treated with Parez 631 NC temporary wet strength resin at a rate of 5.45 kg/tonne.
  • Parez 631 NC is a glyoxalated cationic polyacrylamide resin supplied by Cytec.
  • the second fibrous slurry was also mechanically refined to maintain target tensile strengths. Fiber consistency of the second slurry was about 0.04%.
  • Partial dewatering of the embryonic web through the forming fabric was assisted by vacuum boxes.
  • the embryonic web was transferred from the inner forming fabric to a Lindsay 3080-CCW transfer fabric with the assistance of a vacuum transfer shoe at a consistency of about 29%.
  • the speed of the forming fabric was about 2285 feet/minute and the speed of the transfer fabric was about 1800 feet/minute, yielding a negative draw (rush transfer) of 27%.
  • the web was then transferred from the transfer fabric to the throughdryer fabric (Asten Velostar 800) at a consistency of about 29%.
  • the web was dried by the throughdriers to a consistency of about 94%.
  • the dried web was transferred to the reel between two transfer fabrics (Asten 866 and Lindsay 3070) and wound into a roll on the reel .
  • the resulting tissue paper had a basis weight of 29 g/m 2 , geometric mean tensile of 710 g/3 inches, wet CD tensile of 123 g/3 inches (7.62 centimeters), wet/dry tensile ratio of 20.3% and a bulk of 12.5 cc/g.
  • the tissue paper had high tactile softness as determined by panel evaluation.
  • a three-layer tissue paper sheet was produced in accordance with Example 1, except that the first short fiber slurry did not contain a debonding agent. Instead the outer EHWK layers of the undried web were sprayed with a solution of Berocell 596 debonding agent.
  • the debonding agent solution was applied to the outer layers using spray applicators 20 and 28 and corresponding vacuum boxes 19 and 27 as shown in Figure 1.
  • the debonding agent was applied to the outer layers at a rate of 5 kg. debonding agent/tonne of EHWK fiber. Fiber consistency of the web at the point of spray addition was about 29%.
  • the resulting tissue paper had a basis weight of 28.6 g/m 2 , geometric mean tensile of 723 g/3 inches, wet CD tensile of 113 g/3 inches (7.62 centimeters), wet/dry tensile ratio of 19.3% and a bulk of 12.2 cc/g.
  • the tissue paper had high tactile softness as determined by panel evaluation.
  • a three-layer tissue paper sheet was produced in accordance with Example 1, except: 1) the first short fiber slurry (EHWK) was treated with 7.5 kg/tonne of Berocell 584 debonding agent (Berocell 584 is a nonionic, cationic surfactant system supplied by Eka-Nobel); 2) the second long fiber slurry (NSWK) was treated with 6.36 kg/tonne of Parez 631 NC temporary wet strength agent; 3) the negative draw between the forming fabric and transfer fabric was 29%; 4) the layer split was 40%/20%/40%; 5) the inner and outer forming fabrics were Lindsay 2164 fabrics, the wet end transfer fabric was an Albany 94- MSS, the TAD fabric was a Lindsay T216-3, and the dry end transfer fabrics were an Albany 94-M and a Lindsay 3070; and 6) the transfer from the inner forming fabric to the transfer fabric occurred at a consistency of about 26% and the transfer to the TAD fabric occurred at a consistency of about 27%.
  • EHWK first short
  • the resulting tissue paper had a basis weight of 27.8 g/m 2 , geometric mean tensile of 696 g/3 inches, wet CD tensile of 102 g/3 inches (7.62 centimeters), wet/dry tensile ratio of 18.1% and a bulk of 11.31 cc/g.
  • the tissue paper had high tactile softness as determined by panel evaluation.
  • a three-layer tissue paper sheet was produced in accordance with Example 3, except: 1) the first short fiber slurry was composed of southern hardwood kraft fibers (SHWK); 2) the second long fiber slurry (NSWK) had been treated with 9.66 kg/tonne of Parez 631 NC temporary wet strength agent; 3) the layer split was 40%/20%/40%; and 4) the transfer from the inner forming fabric to the transfer fabric occurred at a consistency of about 28% and the transfer to the TAD fabric occurred at a consistency of about 29%.
  • SHWK southern hardwood kraft fibers
  • NSWK second long fiber slurry
  • the layer split was 40%/20%/40%
  • the transfer from the inner forming fabric to the transfer fabric occurred at a consistency of about 28% and the transfer to the TAD fabric occurred at a consistency of about 29%.
  • the resulting tissue paper had a basis weight of 29.4 g/m 2 , geometric mean tensile of 726 g/3 inches, wet CD tensile of 107 g/3 inches (7.62 centimeters), wet/dry tensile ratio of 18.1% and a bulk of 9.95 cc/g.
  • the tissue paper had high tactile softness as determined by panel evaluation.
  • a three-layer tissue paper sheet was produced in accordance with Example 2, except: 1) the outer layers of the undried web were sprayed with Ucarsil HCP textile softener (debonding agent) at a rate of 10 kg Ucarsil HCP/tonne EHWK (Ucarsil HCP is an organo odified silicone softener obtained from Union Carbide); 2) the second long fiber slurry (NSWK) was treated with 4.33 kg/tonne of Parez 631 NC temporary wet strength agent; 3) the negative draw between the forming fabric and transfer fabric was 30%; 4) the layer split was 35%/30%/35%; 5) the wet end transfer fabric was an Albany 94-M, the TAD fabric was a Lindsay T216-4, and the dry end transfer fabrics were both Lindsay 3070 fabrics; and 6) the dried web was calendered using a reel calender consisting of a 20-inch steel roll and a 20.5-inch rubber roll (110 P&J hardness, 0.75 inch cover thickness) engaged to a ni
  • the resulting tissue paper had a basis weight of 30.1 gm/m 2 , geometric mean tensile of 679 g/3 inches, wet CD tensile of 100g/3 inches (7.62 centimeters), wet/dry tensile ratio of 18.1% and a bulk of 8.35 cc/g.
  • the tissue paper had high tactile softness as determined by panel evaluation.
  • Example 6 A pilot scale twin wire through air dried papermaking machine, similar to that described in Figure 1 but having a Yankee dryer between roll 40 and the reel 38, was used to produce a creped, throughdried tissue in accordance with this invention.
  • the paper machine had a layered headbox with a top chamber, two central chambers, and a bottom chamber.
  • a first fibrous slurry composed of southern hardwood kraft (SHWK) fibers was pumped through the top and bottom headbox chambers, and, simultaneously, a second fibrous slurry composed of northern hardwood kraft fibers (NHWK) was pumped through the central headbox chambers and delivered in superposed relation onto the forming fabric to form thereon a three- layer embryonic web.
  • the layer split was 33.3%/33.3%/33.3%.
  • the SHWK fibers pumped through the top chamber of the headbox were treated with 2.5 kg/tonne of Berocell 596 debonding agent.
  • the NSWK fibers of the second long fiber slurry were treated with Parez 631 NC temporary wet strength resin at a rate of 8.15kg/tonne.
  • the second fibrous slurry was also treated with sufficient starch to maintain target tensile strengths.
  • the SHWK fibers pumped through the bottom chamber of the headbox were untreated.
  • Dewatering of the embryonic web occurred through the forming fabric and was assisted by vacuum boxes.
  • the embryonic web was transferred from the forming fabric to a transfer fabric with the assistance of a vacuum transfer roll at a consistency of about 29%.
  • the web was then transferred from the transfer fabric to the throughdryer fabric at a consistency of about 29%.
  • the web was dried by the throughdriers to a consistency of about 94%, adhered to a Yankee dryer, creped off the Yankee with a doctor blade, and wound into a roll on the reel .
  • the resulting tissue paper had a basis weight of 27.1g/m 2 , geometric mean tensile of 768g/3 inches, wet CD tensile of 107 g/3 inches (7.62 centimeters), wet/dry tensile ratio of 20.0% and a bulk of 7.88cc/g.
  • the tissue paper had high tactile softness as determined by panel evaluation.
  • Example 7
  • a pilot scale crescent former wet-pressed papermaking machine was used to produce a creped tissue in accordance with this invention.
  • the paper machine had a layered headbox with a top chamber, a center chamber, and a bottom chamber.
  • a first fibrous slurry composed of EHWK fibers was pumped through the top and bottom headbox chambers, and, simultaneously, a second fibrous slurry composed of NSWK fibers was pumped through the center headbox chamber and delivered in superposed relation onto the felt to form thereon a three-layer embryonic web.
  • the layer split of the embryonic web was 30%/40%/30%.
  • the EHWK fibers of the first slurry were processed with 1 kg/tonne of Berocell 584 debonder in a Maule shaft disperser with a power input of 55 kW at a consistency of about 34% and at a temperature of about 178°F.
  • the NSWK fibers of the second slurry were treated with Kymene 557 LX permanent wet strength resin at a rate of 2.27 kg/tonne.
  • Kymene 557 LX is a cationic polyamide-epichlorohydrin resin supplied by Hercules, Incorporated.
  • Forty percent of the second fibrous slurry was mechanically refined to maintain target tensile strengths.
  • the web was carried by the felt to the Yankee dryer, where the web was adhered to the dryer and then creped off the Yankee with a doctor blade and was wound into a roll on the reel.
  • the resulting tissue paper had a basis weight of 18.1 lb/2880 ft 2 , geometric mean tensile of 1091 g/3 inches (7.62 centimeters), wet CD tensile of 109 g/3", wet/dry tensile ratio of 13% and a bulk of 6.4 cc/g.
  • the tissue paper had high tactile softness as determined by panel evaluation.

Abstract

Tissues having a combination of softness and good wet strength are made by producing a multi-layered tissue in which debonding agents and wet strength agents are provided in separate layers. The wet strength agents are provided in the central layer(s) and the debonding agents are provided in the outer layer(s) of the tissue.

Description

SOFT LAYERED TISSUES HAVING HIGH WET STRENGTH
Background of the Invention In the manufacture of tissue paper useful as facial tissue, bath tissue, paper towels and the like, it is well known to use various additives to enhance the properties of the product. Such additives include wet strength agents, which can be permanent or temporary, and debonding agents. As the name implies, wet strength agents impart strength retention to the tissue sheet when it becomes wet by creating or retaining certain fiber-to-fiber bonds that withstand the presence of water or moisture, which is particularly useful for most tissue applications. Temporary wet strength agents are especially useful for bath tissue, where wet strength is needed while the tissue is being used, but is undesirable after the tissue has been flushed into the sewer system. Debonding agents are desirable for the purpose of enhancing the softness of the tissue sheet by reducing the number of papermaking bonds between fibers and enhancing the surface feel of the tissue.
However, the action of debonding agents inherently is counter to the objective of the wet strength agents, since the debonding agents can prevent the wet strength agents from forming the desired bonds. Hence there is a need for a means of combining wet strength agents and debonders which minimizes the counterproductive interaction of the two classes of chemicals and enables the manufacture of tissue sheets having the beneficial properties of softness and wet strength. Summary of the Invention It has now been discovered that debonding agents and wet strength agents can be added to a tissue sheet in a layer-wise fashion to maximize the effectiveness of each additive while minimizing the interaction of the additives with each other. This enables the papermaker to take full advantage of the properties of the additives and the fibers within the various layers of the tissue, resulting in a soft, yet strong, tissue.
Hence in one aspect, the invention resides in a method for making a soft tissue sheet comprising (a) forming a layered wet web of papermaking fibers using a layered headbox, said layered wet web having a first outer layer, a second outer layer, and at least one inner layer, wherein the two outer layers comprise predominantly hardwood fibers and said at least one inner layer contains a wet strength agent and comprises predominantly softwood fibers, and wherein at least the first outer layer contains a debonding agent; (b) transferring the layered wet web to a throughdrying fabric wherein said second outer layer is in contact with the throughdrying fabric; and (c) throughdrying the web to form a soft tissue sheet. The resulting throughdried web can be creped or uncreped. In an alternative embodiment, the layered web of step (a) can be dried in accordance with conventional "wet-pressing" processes wherein the web is carried by a papermaking felt, pressed against the surface of a Yankee dryer, dried and creped to produce a soft tissue sheet. In another aspect, the invention resides in a soft layered tissue comprising two outer layers and at least one inner layer, wherein said two outer layers contain predominantly hardwood fibers and at least one of the two outer layers, such as the airside layer (hereinafter described), contains a debonding agent, and wherein said at least one inner layer contains predominantly softwood fibers and a wet strength agent. The tissue can be throughdried or wet-pressed and can be creped or uncreped.
As used herein, a "debonding agent" is an additive that enhances the softness of tissue paper. The debonding agents may accomplish this by a variety of means: a) by interfering with formation of hydrogen bonds, such as with fatty quaternary ammonium compounds (debonder); b) by increasing the lubricity of the fibers and increasing flexibility of the web, such as with fatty acid salts and derivatives (e.g., fatty amine derivatives) and silicones; c) reducing surface tension and thereby reducing Campbell's forces during web formation, resulting in reduced bonded area, such as with surfactants; or d) by other means or combinations of means. Suitable debonding agents include, without limitation, alkyl trimethyl quaternary ammonium compounds, dialkyl dimethyl quaternary ammonium compounds, trialkyl methyl quaternary ammonium compounds, dialkoxy alkyl quaternary ammonium compounds, dialkoxy alkyl quaternary ammonium compounds, diamidoamine quaternary compounds, imidazolinium quaternary ammonium compounds, fatty acid derivatives, nonionic surfactants, ampholytic surfactants, silicones, methyl cellulose, hydroxypropyl cellulose, methyl hydroxyethyl cellulose, methyl hydroxypropyl cellulose, methyl hydroxybutyl cellulose, carboxyethylmethyl cellulose, and mixtures thereof.
The debonding agents are preferably incorporated into the outer layer(s) by addition into the layer furnish prior to formation of the web. However, the debonding agents can also be applied to the wet web after formation by spraying the debonding agent onto the web, before drying of the web. In such instances the consistency of the wet web can be about 40 percent or less, more specifically about 30 percent or less, and still more specifically about 20 percent or less. The amount of debonding agent applied to the outer layer(s) can be from about 0.125 kg/tonne per layer (0.25 lb./ton per layer) to 25 kg/tonne per layer (50 lb./ton per layer).
As used herein, a "wet strength agent" is an additive that increases the strength of wet tissue paper. It can provide permanent or temporary wet strength to the tissue. Suitable wet strength agents include, without limitation, urea-formaldehyde resins, melamine-formaldehyde resins, epoxidized polyamide resins, polyamine- polyamide-epichlorohydrin resins, glyoxalated polyacrylamide resins, polyethylenimine resins, temporary wet strength resins described in U.S. Patent No. 4,981,577 to Bjorkquist issued January 1, 1991, herein incorporated by reference, dialdehyde starch, cationic aldehyde starch, cellulose xanthate, synthetic latexes, vegetable gums, glyoxal, acrylic emulsions and a photeric starch siloxanes. The amount of wet strength agent added to the inner layer of softwood fibers can be from 0.25 kg/tonne/layer (0.5 lb./ton) to 25 kg/tonne/layer (50 lb./ton).
Brief Description of the Drawing
Figure 1 is a schematic flow diagram of a tissue making process useful for purposes of this invention.
Detailed Description of the Drawing Referring to Figure 1, a method of making multi-layered tissues suitable for purposes of this invention will be described. (For simplicity, the various tensioning rolls schematically used to define the several fabric runs are shown but not numbered.) It will be appreciated that variations from the apparatus and method illustrated in Figure 1 can be made without departing from the scope of the invention. Shown is a twin wire former having a layered papermaking headbox 10 which injects or deposits an aqueous suspension of papermaking fibers between outer forming fabric 11 and inner forming fabric 12. Inner forming fabric 12 serves to support and carry the newly-formed wet web 13 downstream in the process as the web is partially dewatered to a consistency of about 10 dry weight percent. Additional dewatering of the wet web can be carried out, such as by vacuum suction 14, while the wet web is supported by the forming fabric. As shown, the dryerside layer of the wet web, which is the outer layer of the web that ultimately faces the dryer surface during drying, is in contact with the forming fabric 12. The airside layer is the outer layer on the opposite side of the web and faces away from the dryer during drying.
The wet web is then transferred from the inner forming fabric to a transfer fabric 17 traveling at a slower speed than the forming fabric in order to impart increased stretch into the web. Transfer is preferably carried out with the assistance of a vacuum shoe 18 and a kiss transfer to avoid substantial compression of the wet web. Optional vacuum box 19 can be used to further dewater the web and spray applicator 20 can be used to provide controlled addition of additives such as debonders. The web is then transferred from the transfer fabric 17 to the throughdrying fabric 25 with the aid of a vacuum transfer roll 26. The throughdrying fabric can be traveling at about the same speed or a different speed relative to the transfer fabric. If desired, the throughdrying fabric can be run at a slower speed to further enhance stretch. Transfer is preferably carried out with vacuum assistance to ensure deformation of the sheet to conform to the throughdrying fabric, thus yielding desired bulk and appearance. Optional vacuum box 27 and spray applicator 28 can be used as described above. The level of vacuum used for the web transfers can be from about 3 to about 15 inches of mercury (75 to 380 millimeters of mercury), preferably about 5 inches (125 millimeters) of mercury. The vacuum shoe (negative pressure) can be supplemented or replaced by the use of positive pressure from the opposite side of the web to blow the web onto the next fabric in addition to or as a replacement for sucking it onto the next fabric with vacuum. Also, a vacuum roll or rolls can be used to replace the vacuum shoe(s).
While supported by the throughdrying fabric 25, the web is dried to a consistency of about 94 percent or greater by the throughdryers 30 and 31. The dried basesheet 35 is transferred to carrier fabric 36 with the aid of vacuum roll 37 and transported to the reel 38 using carrier fabric 36 and an optional additional carrier fabric 39. An optional pressurized turning roll 40 can be used to facilitate removal of the web from the carrier fabric 36. Suitable carrier fabrics for this purpose are Albany International 84M or 94M and Asten 959 or 937. Reel calender 45 or subsequent off-line calendering can be used to improve the smoothness and softness of the basesheet, if desired.
Examples
Example 1.
A pilot scale twin wire papermaking machine, as described in Figure 1, was used to produce tissues in accordance with this invention. More specifically, the papermaking machine had a layered headbox with a top chamber, two central chambers, and a bottom chamber. A first fibrous slurry composed primarily of short papermaking fibers, namely eucalyptus hardwood kraft (EHW ), was pumped through the top and bottom headbox chambers and, simultaneously, a second fibrous slurry composed primarily of long papermaking fibers, namely northern softwood kraft (NSWK), was pumped through the central headbox chambers and delivered in superposed relation between the inner and outer forming fabrics to form thereon a three-layered embryonic (wet) web. The inner and outer forming fabrics were Asten 866 fabrics. The dry weight ratio of the three layers (outer layer/inner layer/outer layer), referred to as the layer split, was 37.5%/25%/37.5%. The EHWK fibers of the first slurry had been previously processed in a Maule shaft disperser with a power input of 80kW at a consistency of about 34% and at a temperature of about 184*F. The resulting EHWK fibers were treated with Berocell 596 debonder in the machine chest at a rate of 5 kg/tonne. Berocell 596 is a dimethyl dialkyl ammonium chloride debonder supplied by Eka-Nobel. Fiber consistency of the first slurry was about 0.12%.
The NSWK fibers of the second slurry were treated with Parez 631 NC temporary wet strength resin at a rate of 5.45 kg/tonne. (Parez 631 NC is a glyoxalated cationic polyacrylamide resin supplied by Cytec.) The second fibrous slurry was also mechanically refined to maintain target tensile strengths. Fiber consistency of the second slurry was about 0.04%.
Partial dewatering of the embryonic web through the forming fabric was assisted by vacuum boxes. The embryonic web was transferred from the inner forming fabric to a Lindsay 3080-CCW transfer fabric with the assistance of a vacuum transfer shoe at a consistency of about 29%. The speed of the forming fabric was about 2285 feet/minute and the speed of the transfer fabric was about 1800 feet/minute, yielding a negative draw (rush transfer) of 27%. The web was then transferred from the transfer fabric to the throughdryer fabric (Asten Velostar 800) at a consistency of about 29%. The web was dried by the throughdriers to a consistency of about 94%. The dried web was transferred to the reel between two transfer fabrics (Asten 866 and Lindsay 3070) and wound into a roll on the reel .
The resulting tissue paper had a basis weight of 29 g/m2, geometric mean tensile of 710 g/3 inches, wet CD tensile of 123 g/3 inches (7.62 centimeters), wet/dry tensile ratio of 20.3% and a bulk of 12.5 cc/g. The tissue paper had high tactile softness as determined by panel evaluation.
Example 2.
A three-layer tissue paper sheet was produced in accordance with Example 1, except that the first short fiber slurry did not contain a debonding agent. Instead the outer EHWK layers of the undried web were sprayed with a solution of Berocell 596 debonding agent. The debonding agent solution was applied to the outer layers using spray applicators 20 and 28 and corresponding vacuum boxes 19 and 27 as shown in Figure 1. The debonding agent was applied to the outer layers at a rate of 5 kg. debonding agent/tonne of EHWK fiber. Fiber consistency of the web at the point of spray addition was about 29%. The resulting tissue paper had a basis weight of 28.6 g/m2, geometric mean tensile of 723 g/3 inches, wet CD tensile of 113 g/3 inches (7.62 centimeters), wet/dry tensile ratio of 19.3% and a bulk of 12.2 cc/g. The tissue paper had high tactile softness as determined by panel evaluation.
Example 3.
A three-layer tissue paper sheet was produced in accordance with Example 1, except: 1) the first short fiber slurry (EHWK) was treated with 7.5 kg/tonne of Berocell 584 debonding agent (Berocell 584 is a nonionic, cationic surfactant system supplied by Eka-Nobel); 2) the second long fiber slurry (NSWK) was treated with 6.36 kg/tonne of Parez 631 NC temporary wet strength agent; 3) the negative draw between the forming fabric and transfer fabric was 29%; 4) the layer split was 40%/20%/40%; 5) the inner and outer forming fabrics were Lindsay 2164 fabrics, the wet end transfer fabric was an Albany 94- MSS, the TAD fabric was a Lindsay T216-3, and the dry end transfer fabrics were an Albany 94-M and a Lindsay 3070; and 6) the transfer from the inner forming fabric to the transfer fabric occurred at a consistency of about 26% and the transfer to the TAD fabric occurred at a consistency of about 27%.
The resulting tissue paper had a basis weight of 27.8 g/m2, geometric mean tensile of 696 g/3 inches, wet CD tensile of 102 g/3 inches (7.62 centimeters), wet/dry tensile ratio of 18.1% and a bulk of 11.31 cc/g. The tissue paper had high tactile softness as determined by panel evaluation.
Example 4.
A three-layer tissue paper sheet was produced in accordance with Example 3, except: 1) the first short fiber slurry was composed of southern hardwood kraft fibers (SHWK); 2) the second long fiber slurry (NSWK) had been treated with 9.66 kg/tonne of Parez 631 NC temporary wet strength agent; 3) the layer split was 40%/20%/40%; and 4) the transfer from the inner forming fabric to the transfer fabric occurred at a consistency of about 28% and the transfer to the TAD fabric occurred at a consistency of about 29%.
The resulting tissue paper had a basis weight of 29.4 g/m2, geometric mean tensile of 726 g/3 inches, wet CD tensile of 107 g/3 inches (7.62 centimeters), wet/dry tensile ratio of 18.1% and a bulk of 9.95 cc/g. The tissue paper had high tactile softness as determined by panel evaluation.
Example 5.
A three-layer tissue paper sheet was produced in accordance with Example 2, except: 1) the outer layers of the undried web were sprayed with Ucarsil HCP textile softener (debonding agent) at a rate of 10 kg Ucarsil HCP/tonne EHWK (Ucarsil HCP is an organo odified silicone softener obtained from Union Carbide); 2) the second long fiber slurry (NSWK) was treated with 4.33 kg/tonne of Parez 631 NC temporary wet strength agent; 3) the negative draw between the forming fabric and transfer fabric was 30%; 4) the layer split was 35%/30%/35%; 5) the wet end transfer fabric was an Albany 94-M, the TAD fabric was a Lindsay T216-4, and the dry end transfer fabrics were both Lindsay 3070 fabrics; and 6) the dried web was calendered using a reel calender consisting of a 20-inch steel roll and a 20.5-inch rubber roll (110 P&J hardness, 0.75 inch cover thickness) engaged to a nip width of about 32 millimeters. The resulting tissue paper had a basis weight of 30.1 gm/m2, geometric mean tensile of 679 g/3 inches, wet CD tensile of 100g/3 inches (7.62 centimeters), wet/dry tensile ratio of 18.1% and a bulk of 8.35 cc/g. The tissue paper had high tactile softness as determined by panel evaluation.
Example 6. A pilot scale twin wire through air dried papermaking machine, similar to that described in Figure 1 but having a Yankee dryer between roll 40 and the reel 38, was used to produce a creped, throughdried tissue in accordance with this invention.
The paper machine had a layered headbox with a top chamber, two central chambers, and a bottom chamber. A first fibrous slurry composed of southern hardwood kraft (SHWK) fibers was pumped through the top and bottom headbox chambers, and, simultaneously, a second fibrous slurry composed of northern hardwood kraft fibers (NHWK) was pumped through the central headbox chambers and delivered in superposed relation onto the forming fabric to form thereon a three- layer embryonic web. The layer split was 33.3%/33.3%/33.3%.
The SHWK fibers pumped through the top chamber of the headbox were treated with 2.5 kg/tonne of Berocell 596 debonding agent. The NSWK fibers of the second long fiber slurry were treated with Parez 631 NC temporary wet strength resin at a rate of 8.15kg/tonne. The second fibrous slurry was also treated with sufficient starch to maintain target tensile strengths. The SHWK fibers pumped through the bottom chamber of the headbox were untreated.
Dewatering of the embryonic web occurred through the forming fabric and was assisted by vacuum boxes. The embryonic web was transferred from the forming fabric to a transfer fabric with the assistance of a vacuum transfer roll at a consistency of about 29%. The web was then transferred from the transfer fabric to the throughdryer fabric at a consistency of about 29%. The web was dried by the throughdriers to a consistency of about 94%, adhered to a Yankee dryer, creped off the Yankee with a doctor blade, and wound into a roll on the reel .
The resulting tissue paper had a basis weight of 27.1g/m2, geometric mean tensile of 768g/3 inches, wet CD tensile of 107 g/3 inches (7.62 centimeters), wet/dry tensile ratio of 20.0% and a bulk of 7.88cc/g. The tissue paper had high tactile softness as determined by panel evaluation. Example 7.
A pilot scale crescent former wet-pressed papermaking machine was used to produce a creped tissue in accordance with this invention.
The paper machine had a layered headbox with a top chamber, a center chamber, and a bottom chamber. A first fibrous slurry composed of EHWK fibers was pumped through the top and bottom headbox chambers, and, simultaneously, a second fibrous slurry composed of NSWK fibers was pumped through the center headbox chamber and delivered in superposed relation onto the felt to form thereon a three-layer embryonic web. The layer split of the embryonic web was 30%/40%/30%.
The EHWK fibers of the first slurry were processed with 1 kg/tonne of Berocell 584 debonder in a Maule shaft disperser with a power input of 55 kW at a consistency of about 34% and at a temperature of about 178°F.
The NSWK fibers of the second slurry were treated with Kymene 557 LX permanent wet strength resin at a rate of 2.27 kg/tonne. (Kymene 557 LX is a cationic polyamide-epichlorohydrin resin supplied by Hercules, Incorporated.) Forty percent of the second fibrous slurry was mechanically refined to maintain target tensile strengths.
The web was carried by the felt to the Yankee dryer, where the web was adhered to the dryer and then creped off the Yankee with a doctor blade and was wound into a roll on the reel.
The resulting tissue paper had a basis weight of 18.1 lb/2880 ft2, geometric mean tensile of 1091 g/3 inches (7.62 centimeters), wet CD tensile of 109 g/3", wet/dry tensile ratio of 13% and a bulk of 6.4 cc/g. The tissue paper had high tactile softness as determined by panel evaluation.
All of the foregoing examples illustrate that a soft tissue having good wet strength can be made by the method of this invention. It will be appreciated that the foregoing examples, given for purposes of illustration, are not to be construed as limiting the scope of this invention, which is defined by the following claims.

Claims

We claim:
1. A method for making a soft tissue sheet comprising: (a) forming a layered wet web of papermaking fibers using a layered headbox, said layered wet web having a first outer layer, a second outer layer, and at least one inner layer, wherein the two outer layers comprise predominantly hardwood fibers and said at least one inner layer contains a wet strength agent and comprises predominantly softwood fibers, and wherein at least the first outer layer contains a debonding agent; (b) transferring the layered wet web to a throughdrying fabric; and (c) throughdrying the web.
2. The method of Claim 1 wherein the second outer layer is in contact with the throughdrying fabric;
3. The method of Claim 1 wherein only the first outer layer contains a debonding agent.
4. The method of Claim 1 wherein both outer layers contain a debonding agent.
5. The method of Claim 1 wherein the web has only one inner layer.
6. The method of Claim 1 wherein the web has two inner layers, one of said inner layers substantially containing secondary fibers.
7. The method of Claim 1 wherein the dried web is creped.
8. The method of Claim 1 wherein the dried web is not creped.
9. The method of Claim 1 wherein the debonder is added to the papermaking fibers of the first outer layer prior to forming the wet web.
10. The method of Claim 1 wherein the debonder is sprayed onto the wet web before drying the web.
11. The method of Claim 10 wherein the consistency of the wet web is about 40 percent or less.
12. The method of Claim 10 wherein the consistency of the wet web is about 30 percent or less.
13. The method of Claim 10 wherein the consistency of the wet web is about 20 percent or less.
14. A method for making a soft tissue sheet comprising (a) forming a layered wet web of papermaking fibers using a layered headbox, said layered wet web having first and second layers, wherein said first layer comprises predominantly hardwood fibers and said second layer comprises predominantly softwood fibers, said first layer containing a debonding agent and said second layer contains a wet strength agent; (b) adhering the layered web to the surface of a Yankee dryer with the first layer in contact with the dryer surface; and (c) creping the web.
15. The method of Claim 14 wherein the creped web is plied together with a like web with the second layers in contact with each other to produce a soft two-ply tissue.
16. The method of Claim 14 wherein the layered web comprises a third layer of predominantly hardwood fibers, said third layer being an outer layer.
17. The method of Claim 16 wherein the first and third layers contain a debonding agent.
18. A layered tissue comprising an air side outer layer, a dryer side outer layer and at least one inner layer, wherein said two outer layers contain predominantly hardwood fibers and a debonding agent, and wherein said at least one inner layer contains predominantly softwood fibers and a wet strength agent.
19. A layered, creped, throughdried tissue comprising an airside outer layer, a dryerside outer layer, and at least one inner layer containing predominantly softwood fibers and a wet strength agent, wherein said airside layer contains predominantly hardwood fibers and a debonding agent.
20. A layered, creped wet-pressed tissue comprising an airside outer layer, a dryerside outer layer, and at least one inner layer containing predominantly softwood fibers and a wet strength agent, wherein both outer layers contain predominantly hardwood fibers and a debonding agent.
PCT/US1995/009232 1994-08-22 1995-07-21 Soft layered tissues having high wet strength WO1996006223A1 (en)

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Application Number Priority Date Filing Date Title
AU31397/95A AU683579B2 (en) 1994-08-22 1995-07-21 Soft layered tissues having high wet strength
BR9508808A BR9508808A (en) 1994-08-22 1995-07-21 Process for making soft sheet for tissue or paper towel layered tissue or paper towel tissue or dry paper fully creped in layers and wet pressed crepe paper or layered paper towel
DE69515316T DE69515316T2 (en) 1994-08-22 1995-07-21 GENTLE MULTILAYER TISSUE PAPER WITH HIGH WET RESISTANCE
JP50807096A JP3793572B2 (en) 1994-08-22 1995-07-21 Flexible layered tissue with high wet strength
KR1019970701123A KR970705671A (en) 1994-08-22 1995-07-21 Soft Layered Tissue Having High Wet Strength with high wet strength
MX9701144A MX9701144A (en) 1994-08-22 1995-07-21 Soft layered tissues having high wet strength.
EP95927342A EP0777783B1 (en) 1994-08-22 1995-07-21 Soft layered tissues having high wet strength
PL95319018A PL178164B1 (en) 1994-08-22 1995-07-21 Method of making soft handkerchiefs

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US29415394A 1994-08-22 1994-08-22
US08/294,153 1994-08-22

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CO (1) CO4440461A1 (en)
DE (1) DE69515316T2 (en)
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Publication number Priority date Publication date Assignee Title
WO2002011655A2 (en) * 2000-08-03 2002-02-14 Kimberly-Clark Worldwide, Inc. High-strength, stabilized absorbent article
US6423183B1 (en) 1997-12-24 2002-07-23 Kimberly-Clark Worldwide, Inc. Paper products and a method for applying a dye to cellulosic fibers
US6533989B1 (en) 2000-08-03 2003-03-18 Kimberly-Clark Worldwide, Inc. Multi-chamber process and apparatus for forming a stabilized absorbent web
US6533978B1 (en) 2000-08-03 2003-03-18 Kimberly-Clark Worldwide, Inc. Process and apparatus for forming a stabilized absorbent web
US6582560B2 (en) 2001-03-07 2003-06-24 Kimberly-Clark Worldwide, Inc. Method for using water insoluble chemical additives with pulp and products made by said method
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US6749721B2 (en) 2000-12-22 2004-06-15 Kimberly-Clark Worldwide, Inc. Process for incorporating poorly substantive paper modifying agents into a paper sheet via wet end addition
US6827818B2 (en) 1993-06-24 2004-12-07 Kimberly-Clark Worldwide, Inc. Soft tissue
WO2005111305A1 (en) * 2004-04-30 2005-11-24 Kimberly-Clark Worldwide, Inc. Method to debond paper on a paper machine
US7670459B2 (en) 2004-12-29 2010-03-02 Kimberly-Clark Worldwide, Inc. Soft and durable tissue products containing a softening agent
US7670457B2 (en) * 2002-10-07 2010-03-02 Georgia-Pacific Consumer Products Llc Process for producing absorbent sheet
US7744723B2 (en) 2006-05-03 2010-06-29 The Procter & Gamble Company Fibrous structure product with high softness
US7749355B2 (en) 2005-09-16 2010-07-06 The Procter & Gamble Company Tissue paper
US7749356B2 (en) 2001-03-07 2010-07-06 Kimberly-Clark Worldwide, Inc. Method for using water insoluble chemical additives with pulp and products made by said method
US8293072B2 (en) 2009-01-28 2012-10-23 Georgia-Pacific Consumer Products Lp Belt-creped, variable local basis weight absorbent sheet prepared with perforated polymeric belt
US8632658B2 (en) 2009-01-28 2014-01-21 Georgia-Pacific Consumer Products Lp Multi-ply wiper/towel product with cellulosic microfibers
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WO2014200456A1 (en) * 2013-06-10 2014-12-18 Kimberly-Clark Worldwide, Inc. Soft and strong engineered tissue
WO2015066036A1 (en) * 2013-10-31 2015-05-07 Kimberly-Clark Worldwide, Inc. Durable creped tissue
US9416494B2 (en) 2012-12-26 2016-08-16 Kimberly-Clark Worldwide, Inc. Modified cellulosic fibers having reduced hydrogen bonding
US9719213B2 (en) 2014-12-05 2017-08-01 First Quality Tissue, Llc Towel with quality wet scrubbing properties at relatively low basis weight and an apparatus and method for producing same
US9988763B2 (en) 2014-11-12 2018-06-05 First Quality Tissue, Llc Cannabis fiber, absorbent cellulosic structures containing cannabis fiber and methods of making the same
US10099425B2 (en) 2014-12-05 2018-10-16 Structured I, Llc Manufacturing process for papermaking belts using 3D printing technology
US10208426B2 (en) 2016-02-11 2019-02-19 Structured I, Llc Belt or fabric including polymeric layer for papermaking machine
US10273635B2 (en) 2014-11-24 2019-04-30 First Quality Tissue, Llc Soft tissue produced using a structured fabric and energy efficient pressing
US10301779B2 (en) 2016-04-27 2019-05-28 First Quality Tissue, Llc Soft, low lint, through air dried tissue and method of forming the same
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US10422082B2 (en) 2016-08-26 2019-09-24 Structured I, Llc Method of producing absorbent structures with high wet strength, absorbency, and softness
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US9410292B2 (en) 2012-12-26 2016-08-09 Kimberly-Clark Worldwide, Inc. Multilayered tissue having reduced hydrogen bonding
MX2018010386A (en) * 2016-02-29 2018-11-29 Kemira Oyj A softener composition.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994771A (en) * 1975-05-30 1976-11-30 The Procter & Gamble Company Process for forming a layered paper web having improved bulk, tactile impression and absorbency and paper thereof
EP0003377A1 (en) * 1978-01-19 1979-08-08 THE PROCTER & GAMBLE COMPANY Ply-separable absorbent paper sheet and process for its manufacture
EP0029269A1 (en) * 1979-11-13 1981-05-27 THE PROCTER & GAMBLE COMPANY Layered paper having a soft and smooth velutinous surface, and method of making such paper
EP0631014A1 (en) * 1993-06-24 1994-12-28 Kimberly-Clark Corporation Soft tissue product and process of making same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240562A (en) * 1992-10-27 1993-08-31 Procter & Gamble Company Paper products containing a chemical softening composition
CA2096978A1 (en) * 1993-03-18 1994-09-19 Michael A. Hermans Method for making paper sheets having high bulk and absorbency

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994771A (en) * 1975-05-30 1976-11-30 The Procter & Gamble Company Process for forming a layered paper web having improved bulk, tactile impression and absorbency and paper thereof
EP0003377A1 (en) * 1978-01-19 1979-08-08 THE PROCTER & GAMBLE COMPANY Ply-separable absorbent paper sheet and process for its manufacture
EP0029269A1 (en) * 1979-11-13 1981-05-27 THE PROCTER & GAMBLE COMPANY Layered paper having a soft and smooth velutinous surface, and method of making such paper
EP0631014A1 (en) * 1993-06-24 1994-12-28 Kimberly-Clark Corporation Soft tissue product and process of making same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6827818B2 (en) 1993-06-24 2004-12-07 Kimberly-Clark Worldwide, Inc. Soft tissue
US7156954B2 (en) 1993-06-24 2007-01-02 Kimberly-Clark Worldwide, Inc. Soft tissue
US6849157B2 (en) 1993-06-24 2005-02-01 Kimberly-Clark Worldwide, Inc. Soft tissue
US6423183B1 (en) 1997-12-24 2002-07-23 Kimberly-Clark Worldwide, Inc. Paper products and a method for applying a dye to cellulosic fibers
US6533989B1 (en) 2000-08-03 2003-03-18 Kimberly-Clark Worldwide, Inc. Multi-chamber process and apparatus for forming a stabilized absorbent web
US6608237B1 (en) 2000-08-03 2003-08-19 Kimberly-Clark Worldwide, Inc. High-strength, stabilized absorbent article
US6533978B1 (en) 2000-08-03 2003-03-18 Kimberly-Clark Worldwide, Inc. Process and apparatus for forming a stabilized absorbent web
WO2002011655A2 (en) * 2000-08-03 2002-02-14 Kimberly-Clark Worldwide, Inc. High-strength, stabilized absorbent article
WO2002011655A3 (en) * 2000-08-03 2002-05-10 Kimberly Clark Co High-strength, stabilized absorbent article
US6749721B2 (en) 2000-12-22 2004-06-15 Kimberly-Clark Worldwide, Inc. Process for incorporating poorly substantive paper modifying agents into a paper sheet via wet end addition
US7678232B2 (en) 2000-12-22 2010-03-16 Kimberly-Clark Worldwide, Inc. Process for incorporating poorly substantive paper modifying agents into a paper sheet via wet end addition
US6582560B2 (en) 2001-03-07 2003-06-24 Kimberly-Clark Worldwide, Inc. Method for using water insoluble chemical additives with pulp and products made by said method
CN100422441C (en) * 2001-03-07 2008-10-01 金伯利-克拉克环球公司 Method for processing pulp using water insoluble chemical additives
US7749356B2 (en) 2001-03-07 2010-07-06 Kimberly-Clark Worldwide, Inc. Method for using water insoluble chemical additives with pulp and products made by said method
WO2004025029A1 (en) * 2002-09-11 2004-03-25 Kimberly-Clark Worldwide, Inc. Improved method for using water insoluble chemical additives with pulp and products made by said method
US8568559B2 (en) 2002-10-07 2013-10-29 Georgia-Pacific Consumer Products Lp Method of making a cellulosic absorbent sheet
US8562786B2 (en) 2002-10-07 2013-10-22 Georgia-Pacific Consumer Products Lp Method of making a fabric-creped absorbent cellulosic sheet
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US8435381B2 (en) 2002-10-07 2013-05-07 Georgia-Pacific Consumer Products Lp Absorbent fabric-creped cellulosic web for tissue and towel products
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US7670457B2 (en) * 2002-10-07 2010-03-02 Georgia-Pacific Consumer Products Llc Process for producing absorbent sheet
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WO2005111305A1 (en) * 2004-04-30 2005-11-24 Kimberly-Clark Worldwide, Inc. Method to debond paper on a paper machine
US7670459B2 (en) 2004-12-29 2010-03-02 Kimberly-Clark Worldwide, Inc. Soft and durable tissue products containing a softening agent
US7749355B2 (en) 2005-09-16 2010-07-06 The Procter & Gamble Company Tissue paper
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USRE42968E1 (en) * 2006-05-03 2011-11-29 The Procter & Gamble Company Fibrous structure product with high softness
US7744723B2 (en) 2006-05-03 2010-06-29 The Procter & Gamble Company Fibrous structure product with high softness
US8864944B2 (en) 2009-01-28 2014-10-21 Georgia-Pacific Consumer Products Lp Method of making a wiper/towel product with cellulosic microfibers
US8864945B2 (en) 2009-01-28 2014-10-21 Georgia-Pacific Consumer Products Lp Method of making a multi-ply wiper/towel product with cellulosic microfibers
US8852397B2 (en) 2009-01-28 2014-10-07 Georgia-Pacific Consumer Products Lp Methods of making a belt-creped absorbent cellulosic sheet prepared with a perforated polymeric belt
US8652300B2 (en) 2009-01-28 2014-02-18 Georgia-Pacific Consumer Products Lp Methods of making a belt-creped absorbent cellulosic sheet prepared with a perforated polymeric belt
US8632658B2 (en) 2009-01-28 2014-01-21 Georgia-Pacific Consumer Products Lp Multi-ply wiper/towel product with cellulosic microfibers
US8293072B2 (en) 2009-01-28 2012-10-23 Georgia-Pacific Consumer Products Lp Belt-creped, variable local basis weight absorbent sheet prepared with perforated polymeric belt
US9702089B2 (en) 2012-08-03 2017-07-11 First Quality Tissue, Llc Soft through air dried tissue
US10190263B2 (en) 2012-08-03 2019-01-29 First Quality Tissue, Llc Soft through air dried tissue
US10570570B2 (en) 2012-08-03 2020-02-25 First Quality Tissue, Llc Soft through air dried tissue
US9995005B2 (en) 2012-08-03 2018-06-12 First Quality Tissue, Llc Soft through air dried tissue
US9382666B2 (en) 2012-08-03 2016-07-05 First Quality Tissue, Llc Soft through air dried tissue
US8968517B2 (en) 2012-08-03 2015-03-03 First Quality Tissue, Llc Soft through air dried tissue
US9725853B2 (en) 2012-08-03 2017-08-08 First Quality Tissue, Llc Soft through air dried tissue
WO2014022848A1 (en) * 2012-08-03 2014-02-06 First Quality Tissue, Llc Soft through air dried tissue
US9506203B2 (en) 2012-08-03 2016-11-29 First Quality Tissue, Llc Soft through air dried tissue
US9580872B2 (en) 2012-08-03 2017-02-28 First Quality Tissue, Llc Soft through air dried tissue
US9702090B2 (en) 2012-08-03 2017-07-11 First Quality Tissue, Llc Soft through air dried tissue
US9416494B2 (en) 2012-12-26 2016-08-16 Kimberly-Clark Worldwide, Inc. Modified cellulosic fibers having reduced hydrogen bonding
WO2014200456A1 (en) * 2013-06-10 2014-12-18 Kimberly-Clark Worldwide, Inc. Soft and strong engineered tissue
US9365982B2 (en) 2013-10-31 2016-06-14 Kimberly-Clark Worldwide, Inc. Durable creped tissue
KR102294816B1 (en) 2013-10-31 2021-08-30 킴벌리-클라크 월드와이드, 인크. Durable creped tissue
AU2014342537B2 (en) * 2013-10-31 2018-03-15 Kimberly-Clark Worldwide, Inc. Durable creped tissue
WO2015066036A1 (en) * 2013-10-31 2015-05-07 Kimberly-Clark Worldwide, Inc. Durable creped tissue
KR20160078456A (en) * 2013-10-31 2016-07-04 킴벌리-클라크 월드와이드, 인크. Durable creped tissue
US11391000B2 (en) 2014-05-16 2022-07-19 First Quality Tissue, Llc Flushable wipe and method of forming the same
US9988763B2 (en) 2014-11-12 2018-06-05 First Quality Tissue, Llc Cannabis fiber, absorbent cellulosic structures containing cannabis fiber and methods of making the same
US11807992B2 (en) 2014-11-24 2023-11-07 First Quality Tissue, Llc Soft tissue produced using a structured fabric and energy efficient pressing
US10273635B2 (en) 2014-11-24 2019-04-30 First Quality Tissue, Llc Soft tissue produced using a structured fabric and energy efficient pressing
US10900176B2 (en) 2014-11-24 2021-01-26 First Quality Tissue, Llc Soft tissue produced using a structured fabric and energy efficient pressing
US9719213B2 (en) 2014-12-05 2017-08-01 First Quality Tissue, Llc Towel with quality wet scrubbing properties at relatively low basis weight and an apparatus and method for producing same
US11752688B2 (en) 2014-12-05 2023-09-12 Structured I, Llc Manufacturing process for papermaking belts using 3D printing technology
US9840812B2 (en) * 2014-12-05 2017-12-12 First Quality Tissue, Llc Towel with quality wet scrubbing properties at relatively low basis weight and an apparatus and method for producing same
US10099425B2 (en) 2014-12-05 2018-10-16 Structured I, Llc Manufacturing process for papermaking belts using 3D printing technology
US10675810B2 (en) 2014-12-05 2020-06-09 Structured I, Llc Manufacturing process for papermaking belts using 3D printing technology
US10753046B2 (en) 2015-02-27 2020-08-25 Kimberly-Clark Worldwide, Inc. Soft, strong and bulky tissue
US10385516B2 (en) 2015-02-27 2019-08-20 Kimberly-Clark Worldwide, Inc. Soft, strong and bulky tissue
US10577748B2 (en) 2015-04-29 2020-03-03 Essity Hygiene And Health Aktiebolag Tissue paper comprising pulp fibers originating from miscanthus and method for manufacturing the same
US10954635B2 (en) 2015-10-13 2021-03-23 First Quality Tissue, Llc Disposable towel produced with large volume surface depressions
US10544547B2 (en) 2015-10-13 2020-01-28 First Quality Tissue, Llc Disposable towel produced with large volume surface depressions
US10538882B2 (en) 2015-10-13 2020-01-21 Structured I, Llc Disposable towel produced with large volume surface depressions
US11242656B2 (en) 2015-10-13 2022-02-08 First Quality Tissue, Llc Disposable towel produced with large volume surface depressions
US10954636B2 (en) 2015-10-13 2021-03-23 First Quality Tissue, Llc Disposable towel produced with large volume surface depressions
US11577906B2 (en) 2015-10-14 2023-02-14 First Quality Tissue, Llc Bundled product and system
US11220394B2 (en) 2015-10-14 2022-01-11 First Quality Tissue, Llc Bundled product and system
US11028534B2 (en) 2016-02-11 2021-06-08 Structured I, Llc Belt or fabric including polymeric layer for papermaking machine
US10208426B2 (en) 2016-02-11 2019-02-19 Structured I, Llc Belt or fabric including polymeric layer for papermaking machine
US11634865B2 (en) 2016-02-11 2023-04-25 Structured I, Llc Belt or fabric including polymeric layer for papermaking machine
US10787767B2 (en) 2016-02-11 2020-09-29 Structured I, Llc Belt or fabric including polymeric layer for papermaking machine
US10858786B2 (en) 2016-04-27 2020-12-08 First Quality Tissue, Llc Soft, low lint, through air dried tissue and method of forming the same
US10301779B2 (en) 2016-04-27 2019-05-28 First Quality Tissue, Llc Soft, low lint, through air dried tissue and method of forming the same
US10941525B2 (en) 2016-04-27 2021-03-09 First Quality Tissue, Llc Soft, low lint, through air dried tissue and method of forming the same
US10844548B2 (en) 2016-04-27 2020-11-24 First Quality Tissue, Llc Soft, low lint, through air dried tissue and method of forming the same
US11674266B2 (en) 2016-04-27 2023-06-13 First Quality Tissue, Llc Soft, low lint, through air dried tissue and method of forming the same
US11668052B2 (en) 2016-04-27 2023-06-06 First Quality Tissue, Llc Soft, low lint, through air dried tissue and method of forming the same
US10422082B2 (en) 2016-08-26 2019-09-24 Structured I, Llc Method of producing absorbent structures with high wet strength, absorbency, and softness
US11725345B2 (en) 2016-08-26 2023-08-15 Structured I, Llc Method of producing absorbent structures with high wet strength, absorbency, and softness
US10982392B2 (en) 2016-08-26 2021-04-20 Structured I, Llc Absorbent structures with high wet strength, absorbency, and softness
US11098448B2 (en) 2016-09-12 2021-08-24 Structured I, Llc Former of water laid asset that utilizes a structured fabric as the outer wire
US10422078B2 (en) 2016-09-12 2019-09-24 Structured I, Llc Former of water laid asset that utilizes a structured fabric as the outer wire
US11913170B2 (en) 2016-09-12 2024-02-27 Structured I, Llc Former of water laid asset that utilizes a structured fabric as the outer wire
US11583489B2 (en) 2016-11-18 2023-02-21 First Quality Tissue, Llc Flushable wipe and method of forming the same
US11634870B2 (en) 2017-02-22 2023-04-25 Kimberly-Clark Worldwide, Inc. Layered tissue comprising non-wood fibers
US11053643B2 (en) 2017-02-22 2021-07-06 Kimberly-Clark Worldwide, Inc. Layered tissue comprising non-wood fibers
US11286622B2 (en) 2017-08-23 2022-03-29 Structured I, Llc Tissue product made using laser engraved structuring belt
US10619309B2 (en) 2017-08-23 2020-04-14 Structured I, Llc Tissue product made using laser engraved structuring belt
US11505898B2 (en) 2018-06-20 2022-11-22 First Quality Tissue Se, Llc Laminated paper machine clothing
US11697538B2 (en) 2018-06-21 2023-07-11 First Quality Tissue, Llc Bundled product and system and method for forming the same
US11738927B2 (en) 2018-06-21 2023-08-29 First Quality Tissue, Llc Bundled product and system and method for forming the same
CN113463436A (en) * 2020-03-30 2021-10-01 王子控股株式会社 Sanitary tissue paper

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KR970705671A (en) 1997-10-09
DE69515316T2 (en) 2000-11-30
CA2145554C (en) 2006-05-09
ZA956979B (en) 1996-03-28
PL178164B1 (en) 2000-03-31
CA2145554A1 (en) 1996-02-23
BR9508808A (en) 1997-08-12
TW305901B (en) 1997-05-21
MX9701144A (en) 1997-05-31
EP0777783B1 (en) 2000-03-01
AU3139795A (en) 1996-03-14
PL319018A1 (en) 1997-07-21
EP0777783A1 (en) 1997-06-11
JP3793572B2 (en) 2006-07-05
JPH10504615A (en) 1998-05-06
AU683579B2 (en) 1997-11-13
DE69515316D1 (en) 2000-04-06
CO4440461A1 (en) 1997-05-07

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