CN103276621A - Preparation method of water-soluble polyvinyl alcohol fiber wet non-woven fabrics - Google Patents
Preparation method of water-soluble polyvinyl alcohol fiber wet non-woven fabrics Download PDFInfo
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- CN103276621A CN103276621A CN2013102283871A CN201310228387A CN103276621A CN 103276621 A CN103276621 A CN 103276621A CN 2013102283871 A CN2013102283871 A CN 2013102283871A CN 201310228387 A CN201310228387 A CN 201310228387A CN 103276621 A CN103276621 A CN 103276621A
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- polyvinyl alcohol
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Abstract
The invention discloses a preparation method of water-soluble polyvinyl alcohol fiber wet non-woven fabrics. The method comprises a step of water-soluble polyvinyl alcohol fiber suspension pulp preparation, a step of ratio blending, a step of wet slope screen shaping, a step of drying, and a step of rolling. The method allows the product fluffiness and the fiber web uniformity to be good, and the transverse and longitudinal tension of products to satisfy user requirements, and has a simple production technology.
Description
Technical field
The present invention relates to the PVA fiber art, refer more particularly to a kind of preparation method of water-soluble polyvinyl alcohol fibers wet nonwoven fabrics.
Background technology
Nonwoven material (Nonwovens) claim non-weaving cloth, nonwoven fabric, supatex fabric, bondedfibre fabric or nonwoven fabric again.Nonwoven techniques is one and comes from weaving, but surmounts the materials processing technology of weaving.Different nonwovens process technology has each self-corresponding technological principle.But on macroscopic view, the basic principle of nonwoven techniques is consistent, and available its technical process is described, and generally can be divided into following four processes: (1) fiber is prepared; (2) become net; (3) reinforce; (4) back arrangement.
At present, domestic water soluble polyvinyl alcohol (PVA) fiber non-woven cloth production process mainly contains two kinds of dry-laying-chemical adhesion method and dry-layings-water acupuncture manipulation.Harder with the soluble non-woven fabrics feel that dry-laying-chemical adhesion is produced, softness is poor, thus limited it aspect medical and other disposable hygienics with the application of cloth aspects, though this method small investment of production equipment.But production efficiency is low, production capacity is little, processing cost is high, and competitive advantage is not obvious.Though and adopt the hardness of the soluble non-woven fabrics product of water acupuncture manipulation processing, softness has improvement, its equipment price is higher, the production cost height is unfavorable for applying.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point of the prior art and provide a kind of soluble non-woven fabrics product bulkiness, fibre net homogeneity better, product transverse and longitudinal pulling force can satisfy the preparation method of the water-soluble polyvinyl alcohol fibers wet nonwoven fabrics of customer requirements.
The present invention realizes in the following way:
A kind of preparation method of water-soluble polyvinyl alcohol fibers wet nonwoven fabrics is characterized in that: may further comprise the steps:
(1) water-soluble polyvinyl alcohol fibers suspends and starches preparation: the water-soluble polyvinyl alcohol fibers of solution temperature Wtb in the different water and crystallinity Xc f is dropped into respectively in the beater tub that has the rotary wind type agitator, by strong current water-soluble polyvinyl alcohol fibers is discongested, be configured to fibre concentration respectively at 1%～10% mixing slurry, adopt respectively then send stock pump to deliver to be equipped with from storage vat in form different fiber suspension slurries;
(2) ratio allotment: two or more fiber suspension is starched employing in proportion send stock pump to deliver in the mixing tank, simultaneously the fiber suspension slurry that mixes being diluted to concentration is 0.01%～0.1%;
(3) wet method is tiltedly netted shaping: be that 0.01%～0.1% slurry that suspends flows to into head box through the center pulp distributor with deployed concentration, the neat and well spaced element on head box carries out to the slurry stream of the slurry that suspends that refinement distributes and is neat and well spaced; The uniform slurry stream that flows out from head box enters building mortion with 0.50～1.00 slurry network speed ratio, at dehydrating amount is to dewater, is shaped under the pressure reduction of 200m3/h～350m3/h, finishes fiber in the building mortion outlet and formalizes;
(4) oven dry: the method that adopts three district's drying cylinders to reinforce, the fiber moisture content that formalizes is dewatered at the drying cylinder that 40%～55% fibre web enters first district, then enter second district and make viscose fibre dissolve and curing, carry out anxious drying in the 3rd district at last and finally make the water-soluble polyvinyl alcohol fibers wet nonwoven fabrics;
(5) rolling: the water-soluble polyvinyl alcohol fibers wet nonwoven fabrics of making enters the sutomatic winding machine coiling, carries out the product that rewinding cuts into different size again.
The invention has the advantages that: adopt the oblique net production technology of wet method device to replace the production technology of original soluble non-woven fabrics dry-laying-chemical adhesion, be medium with water, based on paper technology, adopt oblique network process to become net, solve the low problem of prior art production efficiency, speed of production can reach more than the 400m/min; Solve almost isotropism problem of original wet method nonwoven material simultaneously, fiber is arranged in a jumble; It is mixed almost unrestricted mutually to solve different quality fibers; And soluble non-woven fabrics product bulkiness, the fibre net homogeneity produced are better, and product transverse and longitudinal pulling force can satisfy customer requirements.
The specific embodiment
The specific embodiment of the invention is described in detail in detail:
A kind of preparation method of water-soluble polyvinyl alcohol fibers wet nonwoven fabrics, may further comprise the steps: (1) water-soluble polyvinyl alcohol fibers suspends and starches preparation: the water-soluble polyvinyl alcohol fibers of solution temperature Wtb in the different water and crystallinity Xc f is dropped into respectively in the beater tub that has the rotary wind type agitator, by strong current water-soluble polyvinyl alcohol fibers is discongested, be configured to fibre concentration respectively at 1%～10% mixing slurry, adopt respectively then send stock pump to deliver to be equipped with from storage vat in form different fiber suspension slurries; (2) ratio allotment: two or more fiber suspension is starched employing in proportion send stock pump to deliver in the mixing tank, simultaneously the fiber suspension slurry that mixes is diluted to 0.01%～0.1%; (3) wet method is tiltedly netted shaping: be that 0.01%～0.1% slurry that suspends flows to into head box through the center pulp distributor with deployed concentration, neat and well spaced element on head box carries out refinement distribution and neat and well spaced to the slurry stream of the slurry that suspends, make slurry stream flow velocity unanimity, slurry stream fiber evenly disperses, and the generation microturbulent motion flows to shaped segment dehydration shaping; The uniform slurry stream that flows out from head box enters building mortion with 0.50～1.00 slurry network speed ratio, at dehydrating amount is to dewater, is shaped under the pressure reduction of 200m3/h～350m3/h, finishes fiber in the building mortion outlet and formalizes; (4) oven dry: the method that adopts three district's drying cylinders to reinforce, the fiber moisture content that formalizes is dewatered at the drying cylinder that 40%～55% fibre web enters first district, then enter second district and make viscose fibre dissolve and curing, carry out anxious drying in the 3rd district at last and finally make the water-soluble polyvinyl alcohol fibers wet nonwoven fabrics; (5) rolling: the water-soluble polyvinyl alcohol fibers wet nonwoven fabrics of making enters the sutomatic winding machine coiling, carries out the product that rewinding cuts into different size again.
Solution temperature Wtb in the water of water-soluble polyvinyl alcohol fibers of the present invention (℃) and crystallinity Xc f(%) satisfies following formula: 60 ℃＜Wtb＜120 ℃; 40%≤Xcf≤100%.
The water-soluble polyvinyl alcohol fibers of two or more different solution temperatures of the present invention is except satisfying the above-mentioned relation formula, wherein a kind of fiber A uses as main material, not dissolved in production process, other fibers B or C or D are extraordinary water-soluble fibre, use as viscose fibre in process of production.
The line density of water-soluble polyvinyl alcohol fibers of the present invention does not have specific limited, and in this preparation method, the line density of optimum fiber is between 0.5dtex～10dtex.
The length of water-soluble polyvinyl alcohol fibers of the present invention does not have specific limited, and in tiltedly net was produced, in order to guarantee manufacture paper with pulp quality and technological requirement, optimum fiber length was between 2mm～30mm.
The present invention adopts the novel oblique net shaping technology of manufacturing paper with pulp to produce nonwoven fabric, and its production maximum speed can reach more than the 1000m/min, the preferred 35m/min～800m/min of speed of production of the present invention.
Embodiment 1
Be that 90 ℃, crystallinity Xc f are that solution temperature Wtb70 ℃, crystallinity Xc f are that 45% water-soluble polyvinyl alcohol fibers B drops into respectively in the beater tub that has water quality in 65% water-soluble polyvinyl alcohol fibers A and the water with solution temperature Wtb in the water, be mixed with fibre concentration at 2% mixing slurry, to be diluted to concentration simultaneously be 1% fiber suspension slurry with sending stock pump to send into storage vat respectively; A:B=9:1 is with sending stock pump to send into mixing tank in proportion with the suspending liquid A of storage vat, B, and to be diluted to concentration be 0.03%.In the mixing tank online concentration be 0.03% suspension through the center pulp distributor, enter head box and be dehydrated into net, the slurry network speed than control 0.64; The drying cylinder that the fibre web that is shaped enters first district dewaters, first district's dryer temperature is set at 65 ℃, moisture content was about 20% when fibre web entered the second district drying cylinder, fibre web dissolves viscose fibre in second district and produces the fibre web bonding under the hygrometric state situation, second district's dryer temperature is set between 68 ℃～70 ℃, and last fibre web is dried rapidly in the 3rd district, and the 3rd district's temperature is set between 110～130 ℃, speed of production is set at 150m/min, makes the water-soluble polyvinyl alcohol fibers wet nonwoven fabrics; The grammes per square metre that makes the water-soluble polyvinyl alcohol fibers wet nonwoven fabrics is 45g/m2, and solution temperature is 93 ℃ in the water, and the mechanical performance that detects soluble non-woven fabrics is: transverse breakage is powerful to be 75N, and the longitudinal fracture brute force is 80N, and elongation at break is 13%, meets the requirements.
Embodiment 2
Be that 70 ℃, crystallinity Xc f are that solution temperature Wtb60 ℃, crystallinity Xc f are that 40% water-soluble polyvinyl alcohol fibers B drops into respectively in the beater tub that has water quality in 55% water-soluble polyvinyl alcohol fibers A and the water with solution temperature Wtb in the water, be mixed with fibre concentration at 2% mixing slurry, to be diluted to concentration simultaneously be 1% fiber suspension slurry with sending stock pump to send into storage vat respectively; A:B=9:1 is with sending stock pump to send into mixing tank in proportion with the suspending liquid A of storage vat, B, and to be diluted to concentration be 0.04%; In the mixing tank online concentration be 0.03% suspension through the center pulp distributor, enter head box and be dehydrated into net, the slurry network speed than control 0.84; The drying cylinder that the fibre web that is shaped enters first district dewaters, first district's dryer temperature is set at 55 ℃, moisture content was about 20% when fibre web entered the second district drying cylinder, fibre web dissolves viscose fibre in second district and produces the fibre web bonding under the hygrometric state situation, second district's dryer temperature is set between 60 ℃～65 ℃, fibre web is dried in the 3rd district, the 3rd district's temperature is set between 90～100 ℃, last fibre web enters the 4th drying cylinder dries rapidly, the 4th district's dryer temperature is set at 110 ℃～130 ℃, speed of production is set at 150m/min, makes the water-soluble polyvinyl alcohol fibers wet nonwoven fabrics;
The grammes per square metre that makes the water-soluble polyvinyl alcohol fibers wet nonwoven fabrics is 65g/m2, and solution temperature is 73 ℃ in the water of water-soluble nonwoven fabric, and the mechanical performance that detects soluble non-woven fabrics is: the transverse breakage brute force, 85N, the longitudinal fracture brute force is 90N, and elongation at break is 14.3N, meets the requirements.
Claims (1)
1. the preparation method of a water-soluble polyvinyl alcohol fibers wet nonwoven fabrics is characterized in that: may further comprise the steps:
(1) water-soluble polyvinyl alcohol fibers suspends and starches preparation: the water-soluble polyvinyl alcohol fibers of solution temperature Wtb in the different water and crystallinity Xc f is dropped into respectively in the beater tub that has the rotary wind type agitator, by strong current water-soluble polyvinyl alcohol fibers is discongested, be configured to fibre concentration respectively at 1%～10% mixing slurry, adopt respectively then send stock pump to deliver to be equipped with from storage vat in form different fiber suspension slurries;
(2) ratio allotment: two or more fiber suspension is starched employing in proportion send stock pump to deliver in the mixing tank, simultaneously the fiber suspension slurry that mixes being diluted to concentration is 0.01%～0.1%;
(3) wet method is tiltedly netted shaping: be that 0.01%～0.1% slurry that suspends flows to into head box through the center pulp distributor with deployed concentration, the neat and well spaced element on head box carries out to the slurry stream of the slurry that suspends that refinement distributes and is neat and well spaced; The uniform slurry stream that flows out from head box enters building mortion with 0.50～1.00 slurry network speed ratio, at dehydrating amount is to dewater, is shaped under the pressure reduction of 200m3/h～350m3/h, finishes fiber in the building mortion outlet and formalizes;
(4) oven dry: the method that adopts three district's drying cylinders to reinforce, the fiber moisture content that formalizes is dewatered at the drying cylinder that 40%～55% fibre web enters first district, then enter second district and make viscose fibre dissolve and curing, carry out anxious drying in the 3rd district at last and finally make the water-soluble polyvinyl alcohol fibers wet nonwoven fabrics;
(5) rolling: the water-soluble polyvinyl alcohol fibers wet nonwoven fabrics of making enters the sutomatic winding machine coiling, carries out the product that rewinding cuts into different size again.
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| CN201310228387.1A CN103276621B (en) | 2013-06-08 | 2013-06-08 | Preparation method of water-soluble polyvinyl alcohol fiber wet non-woven fabrics |
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| CN201310228387.1A CN103276621B (en) | 2013-06-08 | 2013-06-08 | Preparation method of water-soluble polyvinyl alcohol fiber wet non-woven fabrics |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005176A (en) * | 2014-06-17 | 2014-08-27 | 桃江县环宇纺织新材料科技有限公司 | 60 DEG C water-soluble non-woven cloth and production method |
| CN105369685A (en) * | 2015-10-08 | 2016-03-02 | 嘉兴学院 | Cow leather fiber insole paper and preparation method thereof |
| CN106381612A (en) * | 2016-08-30 | 2017-02-08 | 绍兴柯桥天圣无纺有限公司 | High-moisture absorbing special terylene wet process hydroentangle non-woven fabric and preparation method for same |
| CN113699690A (en) * | 2021-09-30 | 2021-11-26 | 许玉梅 | Composite non-woven fabric processing technology |
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| US4267016A (en) * | 1978-10-23 | 1981-05-12 | Masaki Okazaki | Polyvinyl alcohol fiber for binding a fibrous sheet and a process for the preparation thereof |
| CN1337492A (en) * | 2001-09-05 | 2002-02-27 | 金周敏 | Water soluble paper and its making process |
| CN1461850A (en) * | 2002-06-01 | 2003-12-17 | 李华旺 | Water-soluble paper and its production method |
| CN102433599A (en) * | 2010-09-29 | 2012-05-02 | 中国石油化工集团公司 | Water-soluble polyvinyl alcohol chopped fiber as well as preparation method and application thereof |
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2013
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Patent Citations (4)
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| US4267016A (en) * | 1978-10-23 | 1981-05-12 | Masaki Okazaki | Polyvinyl alcohol fiber for binding a fibrous sheet and a process for the preparation thereof |
| CN1337492A (en) * | 2001-09-05 | 2002-02-27 | 金周敏 | Water soluble paper and its making process |
| CN1461850A (en) * | 2002-06-01 | 2003-12-17 | 李华旺 | Water-soluble paper and its production method |
| CN102433599A (en) * | 2010-09-29 | 2012-05-02 | 中国石油化工集团公司 | Water-soluble polyvinyl alcohol chopped fiber as well as preparation method and application thereof |
Non-Patent Citations (1)
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| 周光元 等: "关于水溶性聚乙烯醇非织造布在绣花制品中难溶问题的探讨", 《非织造布》, vol. 17, no. 1, 28 February 2009 (2009-02-28), pages 6 - 10 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005176A (en) * | 2014-06-17 | 2014-08-27 | 桃江县环宇纺织新材料科技有限公司 | 60 DEG C water-soluble non-woven cloth and production method |
| CN105369685A (en) * | 2015-10-08 | 2016-03-02 | 嘉兴学院 | Cow leather fiber insole paper and preparation method thereof |
| CN105369685B (en) * | 2015-10-08 | 2018-01-02 | 嘉兴学院 | Kraft fibers shoe-pad paper and preparation method thereof |
| CN106381612A (en) * | 2016-08-30 | 2017-02-08 | 绍兴柯桥天圣无纺有限公司 | High-moisture absorbing special terylene wet process hydroentangle non-woven fabric and preparation method for same |
| CN113699690A (en) * | 2021-09-30 | 2021-11-26 | 许玉梅 | Composite non-woven fabric processing technology |
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| CN103276621B (en) | 2015-06-10 |
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Denomination of invention: A preparation method of water-soluble polyvinyl alcohol fiber wet non-woven fabric Effective date of registration: 20220110 Granted publication date: 20150610 Pledgee: Fujian Yong'an Rural Commercial Bank Co.,Ltd. Pledgor: YONGAN BAOHUALIN INDUSTRIAL DEVELOPMENT Co.,Ltd. Registration number: Y2022350000003 |