US20060145387A1 - Net structure and method of making - Google Patents
Net structure and method of making Download PDFInfo
- Publication number
- US20060145387A1 US20060145387A1 US11/347,945 US34794506A US2006145387A1 US 20060145387 A1 US20060145387 A1 US 20060145387A1 US 34794506 A US34794506 A US 34794506A US 2006145387 A1 US2006145387 A1 US 2006145387A1
- Authority
- US
- United States
- Prior art keywords
- strands
- hook
- netting
- ridges
- ribs
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D28/00—Producing nets or the like, e.g. meshes, lattices
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0046—Fasteners made integrally of plastics
- A44B18/0053—Fasteners made integrally of plastics in which each part has similar elements
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0046—Fasteners made integrally of plastics
- A44B18/0061—Male or hook elements
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0069—Details
- A44B18/0084—Double-sided
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/727—Fastening elements
- B29L2031/729—Hook and loop-type fasteners
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/27—Buckles, buttons, clasps, etc. including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener]
- Y10T24/2792—Buckles, buttons, clasps, etc. including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener] having mounting surface and filaments constructed from common piece of material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24008—Structurally defined web or sheet [e.g., overall dimension, etc.] including fastener for attaching to external surface
- Y10T428/24017—Hook or barb
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
- Y10T428/24074—Strand or strand-portions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
- Y10T442/184—Nonwoven scrim
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The present invention concerns an extrusion formed reticulated web, mesh or netting including reticulated hook fasteners for use with hook and loop fasteners the polymer netting comprising two sets of strands at angles to each other. The first set of strands are a plurality of oriented (molecular orientation created by stretching) strands extending in a first direction and are generally mutually parallel and linear. The second set of strands are a plurality of substantially parallel strands attached only to a first face of the first set of oriented strands. The first set of oriented strands occupy a first planar cross-sectional area in the thickness direction of the formed netting. Said second set of oriented strands occupy a second planar cross-sectional area in the thickness direction of the formed netting. Preferably, these first and second planar cross-sectional areas are substantially mutually exclusive and are abutting. The polymer netting is preferably made by extruding a thermoplastic resin through a die plate, which die plate is shaped to form a base film layer and spaced ridges or ribs projecting from a surface of the base layer. The spaced ridges or ribs formed by the die form the first set of strands forming the reticulated mesh or netting. The second set of transverse strands are formed by transversely cutting the base layer at spaced locations along a length, at a transverse angle to the ridges or ribs, to form discrete cut portions. Subsequently longitudinal stretching of the ridges (in the direction of the ridges or the machine direction) separates these cut portions of the backing, which cut portion then form the second set of spaced apart strands of the reticulated mesh or netting.
Description
- This application is a divisional of U.S. Ser. No. 10/376,979, filed Feb. 28, 2003, now allowed, the disclosure of which is herein incorporated by reference.
- The present invention concerns an extrusion formed reticulated web, mesh or netting including reticulated hook fasteners for use with hook and loop fasteners.
- A method of forming a reticulated hook element is disclosed in U.S. Pat. No. 4,001,366 which describes forming hooks by known methods, similar to that disclosed in U.S. Pat. Nos. 4,894,060 and 4,056,593, discussed below. A reticulated web or mesh structure is formed by intermittently slitting (skip slit) extruded ribs and bases and then pulling to expand the skip slit structure into a mesh.
- U.S. Pat. No. 5,891,549 describes a method for forming a net sheet having surface protrusions thereon. The net is used primarily as spacer elements for drainage and like applications. The net has parallel elements that extend at right angles to each other and it would appear to be formed by a direct molding process involving directly extruding the net-like structure onto a negative mold of the netting.
- A film extrusion process for forming hooks is proposed, for example, in U.S. Pat. Nos. 4,894,060 and 4,056,593, which permits the formation of hook elements by forming rails on a film backing. Instead of the hook elements being formed as a negative of a cavity on a molding surface, as is the more traditional method, the basic hook cross-section is formed by a profiled film extrusion die. The die simultaneously extrudes the film backing and rib structures. The individual hook elements are then preferably formed from the ribs by cutting the ribs transversely, followed by stretching the extruded strip in the direction of the ribs. The backing elongates but the cut rib sections remain substantially unchanged. This causes the individual cut sections of the ribs to separate each from the other in the direction of elongation forming discrete hook elements. Alternatively, using this same type extrusion process, sections of the rib structures can be milled out to form discrete hook elements. With this profile extrusion, the basic hook cross section or profile is only limited by the die shape and hooks can be formed that extend in two directions and have hook head portions that need not taper to allow extraction from a molding surface.
- The present invention is directed at a polymer netting comprising two sets of strands at angles to each other. The first set of strands are a plurality of oriented (molecular orientation created by stretching) strands extending in a first direction and are generally mutually parallel and linear. These first set of strands have a first face and a second face and two side faces. The second set of strands are a plurality of substantially parallel strands attached only to said first face of the first set of oriented strands. The second set of strands also have a first face and a second face and two substantially parallel side faces, where said second set of strands second faces are attached to said first set of oriented strands. The first set of oriented strands occupy a first planar cross-sectional area in the thickness direction of the formed netting. Said second set of oriented strands occupy a second planar cross-sectional area in the thickness direction of the formed netting. Preferably, these first and second planar cross-sectional areas are substantially mutually exclusive and are abutting. The polymer netting is preferably made by a novel adaptation of a known method of making hook fasteners as described, for example, in U.S. Pat. Nos. 3,266,113; 3,557,413; 4,001,366; 4,056,593; 4,189,809 and 4,894,060 or alternatively U.S. Pat. No. 6,209,177, the substance of which are incorporated by reference in their entirety.
- The preferred method generally includes extruding a thermoplastic resin through a die plate, which die plate is shaped to form a base film layer and spaced ridges or ribs projecting from a surface of the base layer. The spaced ridges or ribs formed by the die form the first set of strands forming the reticulated mesh or netting. The second set of transverse strands are formed by transversely cutting the base layer at spaced locations along a length, at a transverse angle to the ridges or ribs, to form discrete cut portions. Subsequently longitudinal stretching of the ridges (in the direction of the ridges or the machine direction) separates these cut portions of the backing, which cut portion then form the second set of spaced apart strands of the reticulated mesh or netting. The stretching also orients the ridges increasing their strength and flexibility.
- In a preferred method a die plate is shaped to form a base film layer and spaced ridges, ribs or hook elements projecting from both surfaces of the base layer. The optional second set of ridges generally forms the cross-section shapes of the desired discrete projections to be produced, which are preferably hook members. The initial hook member thickness is formed by transversely cutting these secondary ridges and the base at spaced locations along their lengths to form discrete cut portions of the base with the ridges. Subsequently longitudinal stretching of the backing layer (in the direction of the ridges on the machine direction) separates these discrete cut portions, which cut portions then form the second set of spaced apart strands having projections or hook members, that have a cross-sectional shape identical to the cross-sectional shape of the second set of extruded ridges.
- The present invention will be further described with reference to the accompanying drawings wherein like reference numerals refer to like parts in the several views, and wherein:
-
FIG. 1 schematically illustrates a method for making a netting such as shown inFIGS. 2-4 . -
FIG. 2 is a perspective view of a precursor film used to make the netting ofFIG. 4 . -
FIG. 3 is a perspective view of a first embodiment netting cut precursor film in accordance with the present invention. -
FIG. 4 is a perspective view of a first embodiment netting in accordance with the present invention. -
FIG. 5 is a perspective view of a second embodiment netting in accordance with the present invention having hook elements. -
FIGS. 6 a and 6 b are enlarged fragmentary side and end views, respectively, of one hook member such as those of the mesh hook netting ofFIG. 5 . -
FIG. 7 is an enlarged fragmentary sectional view of an alternative embodiment hook portion that can be made according to the present invention. -
FIG. 8 is an enlarged fragmentary sectional view of an alternative embodiment hook portion that can be made according to the present invention. -
FIG. 9 is a perspective view of another netting in accordance with the present invention. -
FIG. 10 is a perspective view of another netting in accordance with the present invention having hook elements. - A first embodiment method for forming a reticulated mesh or netting, such as that of
FIG. 4 , is schematically illustrated inFIG. 1 . Generally, the method includes first extruding astrip 50 such as thestrip 1, shown inFIG. 2 , of thermoplastic resin from anextruder 51 through adie 52 having an opening cut, for example, by electron discharge machining, shaped to form thestrip 50 with abase 3, and elongate spacedribs 2 projecting from at least onesurface 5 of thebase layer 3 that have a predetermined cross sectional shape. If desired, a second set of ridges or ribs can be provided on thesecond surface 4 of thebase layer 3 which second set of ridges can have any predetermined shape, including that of a desired hook portions or members. Thestrip 50 is pulled around rollers , 55 through aquench tank 56 filled with a cooling liquid (e.g., water), after which thebase layer 3 is transversely slit or cut at spacedlocations 7 along its lengths by acutter 58 to formdiscrete portions 6 of thebase layer 3. The distance between the cut lines corresponds to about the desiredwidth 11 of thestrand portions 9 to be formed, as is shown inFIG. 4 . Thecuts 7 can be at any desired angle, generally from 90° to 30° from the lengthwise extension of theribs 2. Optionally, the strip can be stretched prior to cutting to provide further molecular orientation to the polymers forming thebase layer 3 orribs 2 and reducing the size of the ridges orribs 2 orbase layer thickness 12 and also reducing the size of thestrands 9 formed by slitting of thebase layer 3. Thecutter 58 can cut using any conventional means such as reciprocating or rotating blades, lasers, or water jets, however preferably it cuts using blades oriented at an angle of about 60 to 90 degrees with respect to lengthwise extension of theribs 2. - After cutting of the
base layer 3, the ridges orribs 2 of thestrip 50 are longitudinally stretched at a stretch ratio of 1.5, and preferably at a stretch ratio of at least about 3.0, preferably between a first pair of niprollers rollers strands 8. Optionally, thestrip 50 can also be transversely stretched to provide orientation to thestrands 9 in their lengthwise extension. The method would apply to all embodiments of the invention.Roller 61 is preferably heated to heat thebase 3 prior to stretching, and theroller 62 is preferably chilled to stabilize the stretchedbase 3. Stretching causesspaces 13 between thecut portions 6 of thebase layer 3, which then become the second set ofstrands 8 for the completed netting 10. - Formed hook members if present can also be heat treated preferably by a
non-contact heat source 64. The temperature and duration of the heating should be selected to cause shrinkage or thickness reduction of at least the head portion by from 5 to 90 percent. The heating is preferably accomplished using a non-contact heating source which can include radiant, hot air, flame, UV, microwave, ultrasonics or focused IR heat lamps. This heat treating can be over the entire strip containing the formed hook portions or can be over only a portion or zone of the strip. Or different portions of the strip can be heat treated to more or less degrees of treatment. In this manner, it is possible to obtain on a single strip hook containing areas with different levels of performance without the need to extrude different shaped rib profiles. This heat treatment can change hook elements continuously or in gradients across a region of the hook strip. In this manner, the hook elements can differ continuously across a defined area of the hook member. Further, the hook density can be the same in the different regions coupled with substantially the same film backing caliper or thickness (e.g., 50 to 500 microns). The caliper can easily be made the same as the hook strip will have the same basis weight and same relative amount of material forming the hook elements and backing in all regions despite the difference in the shape of the hooks caused by the subsequent heat treating. The differential heat treatment can be along different rows or can cut across different rows, so that different types of hooks, such as hooks having different hook thicknesses, can be obtained in a single or multiple rows in the machine direction or the lengthwise direction of the hook strip. The heat treatment can be performed at any time following creation of the hook element, such that customized performance can be created without the need for modifying the basic hook element manufacturing process. - Referring now to
FIG. 5 , an exemplary polymeric mesh hook fastener portion, which can be produced, according to the present invention, generally designated by thereference numeral 14 is shown. The mesh hook netting comprisesstrands 20 having generally parallel upper and lowermajor surfaces hook members 21 projecting from at least theupper surface 23 of thestrand 20. Thestrand 20 can have planar surfaces or surface features as could be desired for tear resistance or reinforcement. Thestrands 20 are separated from each other by cuts and elongation ofribs 8. As is best seen inFIGS. 6a and 6 b, thehook members 21 each comprise astem portion 15 attached at one end to astrand 20 and preferably having taperedsections 16 that widen toward thestrand 20 to increase the hook anchorage and breaking strengths at their junctures with astrand 20, and ahead portion 17 at the end of thestem portion 15opposite strand 20. Thesides 34 of thehead portion 17 can be flush with thesides 35 of thestem portion 15 on two opposite sides. Thehead portion 17 has hook engaging parts orarms stem portion 15 on one or bothsides 38. The hook member shown inFIGS. 6a and 6 b can have a roundedsurface 18 opposite thestem portion 15. Thehead portion 17 shown also has transverse cylindricallyconcave surface portions 19 at the junctures between thestem portion 15 and the surfaces of thehead portion 17 projecting overstrand 20. - With reference to
FIGS. 6 a and 6 b, there is shown a single representative one of thesmall hook members 21 on which its dimensions are represented by reference numerals between dimensional arrows. The height dimension is 30. The stem andhead portions thickness dimension 25, which as shown is the same, and thehead portions 17 have awidth dimension 27 and anarm droop 24. The stem portion has awidth dimension 26 at its base before flaring 16 to thestrand 20. The thickness as shown is for a rectilinear shaped hook, with other shapes the thickness can be measured as the shortest distance between two opposingsides -
FIGS. 7 and 8 illustrate two of many alternate shapes that could be used for the hook members in alternate embodiments of the hook members that can be formed in accordance with the invention method. - The
hook member 45 illustrated inFIG. 7 differs from thehook member 21 ofFIG. 5 in that itshead portion 46 projects farther on opposite sides from itsstem portion 47 and is generally uniformly thick so that it can more easily bend to engage with or disengage from loops on a loop fastener portion. - The
hook member 60 illustrated inFIG. 8 differs from thehook member 21 ofFIG. 5 in that itshead portion 61 projects from only one side of itsstem portion 62 and will thus cause significantly greater peel forces when peeled away from the direction thehead portion 61 projects than when it is peeled toward the direction thehead portion 61 projects. - With all of these hook shapes the hook shape and dimensions can be altered following formation by heat treatment of at least the hook elements. Heat treating in particular will tend to shrink the hook width in the direction that the ribs where extruded, by relaxing any molecular orientation in the hooks as a result of the extrusion of the ribs. In this case the width of the hooks can be less than that of the strands from which the hooks project.
- Suitable polymeric materials from which the netting of the invention can be made include thermoplastic resins comprising polyolefins, e.g. polypropylene and polyethylene, polyvinyl chloride, polystyrene, nylons, polyester such as polyethylene terephthalate and the like and copolymers and blends thereof. Preferably the resin is a polypropylene, polyethylene, polypropylene-polyethylene copolymer or blends thereof.
- An extruded hook netting is shown in
FIG. 10 , which results in hook fastening elements on both faces of the netting. Generally, with a hook netting as shown inFIG. 10 , the precursor film has elongate spaced ribs that project from both surfaces of the base layer where each set of ribs has a cross-sectional shape of the hook portions or members to be formed. The ribs on one face are partially transversely slit at spaced locations along their lengths. The entire ribs and the base layer on the other face are fully cut as per, e.g., theFIG. 5 embodiment. When the partially cut ribs are longitudinally elongated or stretched, as per theFIG. 5 embodiment, they formhook elements 72 and orientedribs 78. Simultaneously with longitudinal stretching, the cut base layer and other set of ribs formtransverse strands 70 andhook elements 71, on thestrands 70. -
FIG. 9 shows anembodiment 80 where thesecondary ribs 81 are not in the form of hooks in their cross sectional profile. This will result in stems being formed on thesecondary strands 89 that could be subsequently formed into hook elements such as by the method described in U.S. Pat. Nos. 6,368,097 and 6,132,660, the substance of which is incorporated herein by reference. - The invention extruded hook netting, such as shown in
FIGS. 5 and 10 , is highly breathable and dimensionally stable, in at least the direction of orientedstrands - 135 Degree Peel Test
- The 135 degree peel test was used to measure the amount of force that was required to peel a sample of the mechanical fastener hook material from a sample of loop fastener material. A 5.1 cm×12.7 cm piece of a loop test material was securely placed on a 5.1 cm×12.7 cm steel panel by using a double-coated adhesive tape. The loop material was placed onto the panel with the cross direction of the loop material parallel to the long dimension of the panel. A 1.9 cm×2.5 cm strip of the mechanical fastener to be tested was cut with the long dimension being in the machine direction of the web. A 2.5 cm wide paper leader was attached to the smooth side of one end of the hook strip. The hook strip was then centrally placed on the loop so that there was a 1.9 cm×2.5 cm contact area between the strip and the loop material and the leading edge of the strip was along the length of the panel. The strip and loop material laminate was then rolled by hand, twice in each direction, using a 1000 gram roller at a rate of approximately 30.5 cm per minute. The sample was then placed in a 135 degree peel jig. The jig was placed into the bottom jaw of an Instron™ Model 1122 tensile tester. The loose end of the paper leader was placed in the upper jaw of the tensile tester. A crosshead speed of 30.5 cm per minute and a chart recorder set at a chart speed of 50.8 cm per minute was used to record the peel force as the hook strip was peeled from the loop material at a constant angle of 135 degrees. An average of the four highest peaks was recorded in grams. The force required to remove the mechanical fastener strip from the loop material was reported in grams/2.54 cm-width. A minimum of 10 tests were run and averaged for each hook and loop combination.
- Two different loop materials were used to measure the performance of the mechanical fastener hook material. Loop material ‘A’ is a nonwoven loop made similar to that described in U.S. Pat. No. 5,616,394 Example 1, available from the 3M Company as KN-1971. Loop material ‘B’ is a knitted loop made similar to that described in U.S. Pat. No. 5,605,729, Example 1 available from the 3M Company as XML-01-160. The loop test materials were obtained from a supply roll of the material after unwinding and discarding several revolutions to expose “fresh” material. The loop test material thus obtained was in a relatively compressed state and was used immediately in the peel test before any significant relofting of the loops could occur.
- Dynamic Shear
- The dynamic shear test was used to measure the amount of force required to shear the sample of mechanical fastener hook material from a sample of loop fastener material. A 2.5 cm×7.5 cm loop sample was cut with the short dimension being the machine direction of the hook. This loop sample was then reinforced with 3M strapping tape on the backside of the loop. A 1.25 cm×2.5 cm hook sample was also prepared. The long dimension is the machine direction of the hook. This sample was laminated to the end of a tab of 3M strapping tape 2.5 cm wide×7.5 cm long. The strapping tape was doubled over on itself on the end without hook to cover the adhesive. The hook was then placed centrally on the loop with long tab directions parallel to each other such that the loop tab extended past on the first end and the hook tab extended past on the second end. The hook was rolled down by hand with a 5
kg rolldown 5 replicates up and back. The assembled tabs were placed into the jaws of an Instron Model 1122 tensile tester. The hook tab placed in the top jaw, the loop tab placed in the bottom jaw. A crosshead speed of 30.5 cm per minute and a chart recorder set at a chart speed of 50.8 cm per minute was used to record the shear force as the hook strip was sheared from the loop material at a constant angle of 180 degrees. The maximum load was recorded in grams. The force required to shear the mechanical fastener strip from the loop material was reported in grams/2.54 cm-width. A minimum of 10 tests were run and averaged for each hook and loop combination. - Hook Dimensions
- The dimensions of the hook materials were measured using a Leica microscope equipped with a zoom lens at a magnification of approximately 25×. The samples were placed on a x-y moveable stage and measured via stage movement to the nearest micron. A minimum of 3 replicates were used and averaged for each dimension. In reference to the Example hooks, as depicted generally in
FIGS. 6 a and 6 b, hook width is indicated bydistance 27, hook height is indicated bydistance 30, arm droop is indicated bydistance 24, and hook thickness is indicated bydistance 25. The dimensions of the hook materials of the invention are shown in Table 1 below. - A mesh hook netting was made using apparatus similar to that shown in
FIG. 1 . A polypropylene/polyethylene impact copolymer (SRC7-644, 1.5 MFI, Dow Chemical) was extruded with a 6.35 cm single screw extruder (24:1 L/D) using a barrel temperature profile of 175° C.-230° C.-230° C. and a die temperature of approximately 230° C. The extrudate was extruded vertically downward through a die having an opening cut by electron discharge machining to produce an extruded profiled web similar to that shown inFIG. 6 a and referred to below as precursor web. The crossweb spacing of the upper ribs was 7.3 ribs per cm. After being shaped by the die, the extrudate is quenched in a water tank at a speed of 6.1 meter/min with the water being maintained at approximately 10° C. The web was then advanced through a cutting station where the upper ribs and the base layer (but not the lower ribs) were transversely cut at an angle of 23 degrees measured from the transverse direction of the web. The spacing of the cuts was 305 microns. After cutting the upper ribs and the base layer, the reticulated web was longitudinally stretched at a stretch ratio of approximately 3 to 1 between a first pair of nip rolls and a second pair of nip rolls to further separate the individual hook elements to approximately 8.5 hooks/cm to produce a hook netting similar to that shown inFIG. 5 . The thickness of the base layer was 219 microns. The upper roll of the first pair of nip rolls was heated to 143° C. to soften the web prior to stretching. The second pair of nip rolls were cooled to approximately 110° C. - The netting of Example 1 was subjected to a non-contact heat treatment on the hook side of the netting by passing the netting at 7.3 meters/min through a gap defined by a heated support roll and a curvilinear perforated metal plate. The perforations were approximately 0.6 cm in diameter and spaced approximately 3.0 cm from each other. The netting was treated over a radial distance of the 46 cm. Hot air at a temperature of approximately 185° C., provided by a 15 kW electric heater, was blown through the perforations in the metal plate onto the hook side of the netting at a velocity of approximately 3350 meter/min. The hooks were approximately 2.5 cm from the perforated plate. The smooth base film side of the web was supported on the heated roll at approximately 149° C. After heat treatment the web was cooled by passing the web over a chill roll maintained at 52° C.
- The precursor web of Example 1 was biaxially stretched in a Karo IV pantograph film stretcher (Bruchner Gmbh) using a chamber temperature of 150° C. The web was preheated for one minute at 150° C. and then simultaneously stretched 3× in the machine direction (MD) and 2.8× in the cross direction (CD) at an interval of 0.67 seconds MD and a 60 second interval CD.
- A web was made as in Example 1 except the thickness of the base layer was 150 microns.
TABLE 1 Example Precursor Web 1 2 3 4 Hook Width (μ) 550 498 524 567 517 Hook Height (μ) 564 566 556 514 562 Hook Droop (μ) 249 229 292 192 229 Hook Thickness (μ) 307 327 267 302 306 Base Thickness (μ) 214 219 199 98 150 Rib Width (μ) 512 285 266 382 279 Rib Height (μ) 545 257 283 235 363 Hook Spacing (CD, /cm) 7.3 9.0 8.9 3.6 8.3 Hook Spacing (MD, /cm) 25.5 8.5 7.8 6.8 7.7 -
TABLE 2 Peel Strength Peel Strength Shear Strength Shear Strength Loop Material ‘A’ Loop Material ‘B’ Loop Material ‘A’ Loop Material ‘B’ Example (gms/2.54 cm) (gms/2.54 cm) (gms/2.54 cm) (gms/2.54 cm) 1 358 217 3428 3550 4 346 312 1524 2692
Claims (7)
1. A method for forming a thermoplastic polymer netting comprising simultaneously extruding a polymer film backing having at least on one face a plurality of integral strand structures, which strand structures extend in a first direction, cutting said formed film backing in a second direction at an angle to said first direction at multiple cut lines substantially through the entire film backing so as to form a plurality of cut portions, orienting said cut film in said first direction so as to separate said cut portions forming a second set of strands and thereby orienting said integral strand structures.
2. The method for forming a thermoplastic polymer netting of claim 1 wherein said cutting of said film backing is through the entire film backing so as to form separate discrete second strands from said film backing.
3. The method for forming a thermoplastic polymer netting of claim 1 wherein said film backing has extruded structures on said second face.
4. The method for forming a thermoplastic polymer netting of claim 1 wherein said structures on said second film backing face form stems on said second set of strands.
5. The method for forming a thermoplastic polymer netting of claim 1 further comprising stretching said second set of strands so that said second strands are oriented at an angle to said first direction.
6. The method for forming a thermoplastic polymer netting of claim 4 wherein said stems form hook elements
7. The method for forming a thermoplastic polymer netting of claim 5 further comprising heat treating the hook elements following formation of the hook elements to alter the shape and or dimensions of the hook elements
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/347,945 US20060145387A1 (en) | 2003-02-28 | 2006-02-06 | Net structure and method of making |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/376,979 US7048984B2 (en) | 2003-02-28 | 2003-02-28 | Net structure and method of making |
US11/347,945 US20060145387A1 (en) | 2003-02-28 | 2006-02-06 | Net structure and method of making |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/376,979 Division US7048984B2 (en) | 2003-02-28 | 2003-02-28 | Net structure and method of making |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060145387A1 true US20060145387A1 (en) | 2006-07-06 |
Family
ID=32908047
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/376,979 Expired - Fee Related US7048984B2 (en) | 2003-02-28 | 2003-02-28 | Net structure and method of making |
US10/706,530 Expired - Fee Related US7235202B2 (en) | 2003-02-28 | 2003-11-12 | Net structure and method of making |
US11/347,945 Abandoned US20060145387A1 (en) | 2003-02-28 | 2006-02-06 | Net structure and method of making |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/376,979 Expired - Fee Related US7048984B2 (en) | 2003-02-28 | 2003-02-28 | Net structure and method of making |
US10/706,530 Expired - Fee Related US7235202B2 (en) | 2003-02-28 | 2003-11-12 | Net structure and method of making |
Country Status (4)
Country | Link |
---|---|
US (3) | US7048984B2 (en) |
CN (1) | CN100558269C (en) |
AR (1) | AR043391A1 (en) |
TW (1) | TWI291921B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040170802A1 (en) * | 2003-02-28 | 2004-09-02 | Jayshree Seth | Net structure and method of making |
US20130231455A1 (en) * | 2010-11-26 | 2013-09-05 | Kaneka Corporation | Stretched film and method for producing the same |
US20210252750A1 (en) * | 2017-12-21 | 2021-08-19 | Velcro Ip Holdings Llc | Molding resin to form continuous structures |
Families Citing this family (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7001475B2 (en) * | 2001-12-11 | 2006-02-21 | 3M Innovative Properties Company | Film structures and methods of making film structures |
US7067185B2 (en) * | 2003-06-11 | 2006-06-27 | 3M Innovative Properties Company | Reinforced hook web |
US7182992B2 (en) * | 2004-02-17 | 2007-02-27 | 3M Innovative Properties Company | Hook fiber |
US7254874B2 (en) * | 2004-03-10 | 2007-08-14 | Leonard Arnold Duffy | Molded surface fasteners and attachment methods |
US7950114B2 (en) * | 2004-03-10 | 2011-05-31 | Leonard Arnold Duffy | Self-adhering device and method |
US7678316B2 (en) * | 2004-06-08 | 2010-03-16 | 3M Innovative Properties Company | Coextruded profiled webs |
US20060019579A1 (en) * | 2004-07-26 | 2006-01-26 | Braunschweig Ehrich J | Non-loading abrasive article |
US7897081B2 (en) * | 2004-12-30 | 2011-03-01 | 3M Innovative Properties Company | Method of extruding articles |
WO2006074058A1 (en) * | 2004-12-30 | 2006-07-13 | 3M Innovative Properties Company | Abrasive article and methods of making same |
US7258705B2 (en) * | 2005-08-05 | 2007-08-21 | 3M Innovative Properties Company | Abrasive article and methods of making same |
US7252694B2 (en) * | 2005-08-05 | 2007-08-07 | 3M Innovative Properties Company | Abrasive article and methods of making same |
US7390244B2 (en) * | 2005-09-16 | 2008-06-24 | 3M Innovative Properties Company | Abrasive article mounting assembly and methods of making same |
US7244170B2 (en) * | 2005-09-16 | 2007-07-17 | 3M Innovative Properties Co. | Abrasive article and methods of making same |
US7393269B2 (en) * | 2005-09-16 | 2008-07-01 | 3M Innovative Properties Company | Abrasive filter assembly and methods of making same |
US8034431B2 (en) * | 2006-01-25 | 2011-10-11 | 3M Innovative Properties Company | Intermittently bonded fibrous web laminate |
US7338355B2 (en) * | 2006-06-13 | 2008-03-04 | 3M Innovative Properties Company | Abrasive article and methods of making and using the same |
US7622180B2 (en) * | 2006-07-10 | 2009-11-24 | 3M Innovative Properties Company | Net hook fasteners |
JP2010502466A (en) * | 2006-09-11 | 2010-01-28 | スリーエム イノベイティブ プロパティズ カンパニー | Abrasive article having a mechanical fastener |
US20080134476A1 (en) * | 2006-12-11 | 2008-06-12 | Steindorf Eric C | Fastener having adjustable fastening strength |
US7452265B2 (en) * | 2006-12-21 | 2008-11-18 | 3M Innovative Properties Company | Abrasive article and methods of making same |
US20080233850A1 (en) * | 2007-03-20 | 2008-09-25 | 3M Innovative Properties Company | Abrasive article and method of making and using the same |
US7628829B2 (en) * | 2007-03-20 | 2009-12-08 | 3M Innovative Properties Company | Abrasive article and method of making and using the same |
ES2369696T3 (en) * | 2007-09-17 | 2011-12-05 | Tenax S.P.A. | DRAINAGE AND FILTERED NETWORK, PARTICULARLY FOR GEOTECHNICAL APPLICATIONS. |
US20100011672A1 (en) * | 2008-07-16 | 2010-01-21 | Kincaid Don H | Coated abrasive article and method of making and using the same |
CN101824826B (en) * | 2009-03-04 | 2012-05-30 | 冈展企业股份有限公司 | Mesh structure |
DE102009019671A1 (en) * | 2009-04-30 | 2010-11-04 | Gottlieb Binder Gmbh & Co. Kg | closing part |
US20110016610A1 (en) * | 2009-07-27 | 2011-01-27 | Steven Wieder | Sweatband with absorbent bamboo inner layer and related method of use |
KR101858768B1 (en) * | 2010-07-27 | 2018-05-16 | 구라레파스닝 가부시키가이샤 | Surface fastener with excellent temporary fixing function |
US8834986B2 (en) | 2011-02-16 | 2014-09-16 | 3M Innovative Properties Company | Continuous web of a plurality of tabs and methods of making and using the same |
US9138031B2 (en) * | 2011-02-16 | 2015-09-22 | 3M Innovative Properties Company | Method of making a mechanical fastening strip and reticulated mechanical fastening strip therefrom |
USD796033S1 (en) | 2011-02-16 | 2017-08-29 | 3M Innovative Properties Company | Mechanical fastener |
USD794181S1 (en) | 2011-02-16 | 2017-08-08 | 3M Innovative Properties Company | Mechanical closure element |
TWI616195B (en) * | 2011-02-16 | 2018-03-01 | 3M新設資產公司 | Method of making a mechanical fastener, reticulated mechanical fastener, and reticulated mechanical fastening laminate |
CN107259720A (en) | 2012-05-16 | 2017-10-20 | 3M创新有限公司 | The method that machanical fastener is manufactured using crown surface |
WO2013172957A1 (en) | 2012-05-16 | 2013-11-21 | 3M Innovative Properties Company | Method of making a mechanical fastener using diverging disks |
WO2013170480A1 (en) | 2012-05-18 | 2013-11-21 | 3M Innovative Properties Company | Method of making a mechanical fastener and apparatus including a roller with protrusions |
US8889243B2 (en) * | 2012-08-16 | 2014-11-18 | 3M Innovative Properties Company | Mechanical fastening nets and methods of making the same |
US9314962B2 (en) | 2013-05-10 | 2016-04-19 | 3M Innovative Properties Company | Method of separating strands on a stretching surface |
US9944764B2 (en) | 2013-05-23 | 2018-04-17 | 3M Innovative Properties Company | Reticulated thermoplastic film and method of making the same |
US9649824B2 (en) | 2013-05-23 | 2017-05-16 | 3M Innovative Properties Company | Laminates including a reticulated thermoplastic film and method of making the same |
WO2015002730A1 (en) * | 2013-06-27 | 2015-01-08 | 3M Innovative Properties Company | Polymeric layers and methods of making the same |
US10188179B2 (en) * | 2013-10-11 | 2019-01-29 | Aplix | Fastener |
US9474338B2 (en) * | 2013-10-11 | 2016-10-25 | Aplix | Fastener |
KR20160127058A (en) | 2014-02-28 | 2016-11-02 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Filtration medium including polymeric netting of ribbons and strands |
US10500801B2 (en) | 2014-02-28 | 2019-12-10 | 3M Innovative Properties Company | Polymeric netting of strands and first and second ribbons and methods of making the same |
CN103818743A (en) * | 2014-03-18 | 2014-05-28 | 刘才平 | Automatic material grasping mechanism for automotive trim ceiling lining |
JP6640193B2 (en) * | 2014-08-27 | 2020-02-05 | スリーエム イノベイティブ プロパティズ カンパニー | Method for producing abrasive article and abrasive article |
FR3027775B1 (en) * | 2014-10-31 | 2016-11-11 | Aplix Sa | HOOK CLOSURE DEVICE IN SENSORY EFFECT HOOKS |
USD763543S1 (en) * | 2015-02-05 | 2016-08-16 | Mafin S.P.A. | Snack |
US10245703B2 (en) | 2015-06-02 | 2019-04-02 | 3M Innovative Properties Company | Latterally-stretched netting bearing abrasive particles, and method for making |
MX2018007718A (en) | 2015-12-21 | 2018-08-15 | 3M Innovative Properties Co | Method of making a laminate with a stretched thermoplastic layer. |
TWI585012B (en) * | 2016-07-07 | 2017-06-01 | Taiwan Paiho Ltd | Surface joint fastener |
GB201715202D0 (en) * | 2017-09-20 | 2017-11-01 | Tensar Tech Ltd | Geogrids |
US11730239B2 (en) | 2017-11-29 | 2023-08-22 | Kuraray Fastening Co., Ltd. | Touch fastener and method of manufacturing the same |
FR3079166B1 (en) * | 2018-03-21 | 2023-10-20 | Aplix Sa | LAMINATED ASSEMBLY, DIAPER PANTS COMPRISING SUCH A SET AND METHOD FOR MANUFACTURING SUCH A SET |
JP6647604B1 (en) * | 2019-02-25 | 2020-02-14 | ニッタモールド株式会社 | Rock fasteners |
WO2021234494A1 (en) | 2020-05-19 | 2021-11-25 | 3M Innovative Properties Company | Porous coated abrasive article and method of making the same |
CN111923517B (en) * | 2020-06-10 | 2022-05-17 | 北京忠信博达建设发展有限公司 | Various steel sheet of type zinc-plated that gives sound insulation and processing equipment thereof |
Citations (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3266113A (en) * | 1963-10-07 | 1966-08-16 | Minnesota Mining & Mfg | Interreacting articles |
US3488415A (en) * | 1965-07-21 | 1970-01-06 | Smith & Nephew | Production of net-like fabrics from plastic material |
US3557413A (en) * | 1968-09-23 | 1971-01-26 | William H Engle | Nonmechanical closure |
US3781398A (en) * | 1972-05-11 | 1973-12-25 | American Velcro Inc | Hook fastener element and method of manufacture |
US3932090A (en) * | 1973-01-31 | 1976-01-13 | Ingrip Fasteners, Inc. | Adjustable extrusion apparatus for producing thread-like products |
US3952127A (en) * | 1971-12-07 | 1976-04-20 | Netion Limited | Extrusion of plastics netting |
US4001366A (en) * | 1972-01-03 | 1977-01-04 | Ingrip Fasteners Inc. | Method for making self-gripping devices having integral trains of gripping elements |
US4056593A (en) * | 1971-03-26 | 1977-11-01 | Repla International S.A.H. | Method of making a fastener |
US4075379A (en) * | 1974-06-19 | 1978-02-21 | Smith & Nephew Plastics Limited | Melt-embossed polymer film |
US4189809A (en) * | 1976-11-10 | 1980-02-26 | Repla International S.A.H. | Fastener device and method of manufacturing |
US4201814A (en) * | 1977-07-02 | 1980-05-06 | John Francis Gilbert | Mesh structures |
US4832834A (en) * | 1988-07-11 | 1989-05-23 | Baird Jr Howard R | Elastomer sieve screen |
US4894060A (en) * | 1988-01-11 | 1990-01-16 | Minnesota Mining And Manufacturing Company | Disposable diaper with improved hook fastener portion |
US5011642A (en) * | 1987-06-05 | 1991-04-30 | Minnesota Mining And Manufacturing Company | Method of making extruded article |
US5179767A (en) * | 1990-07-16 | 1993-01-19 | Allan Robert M | Connector apparatus |
US5344691A (en) * | 1990-03-30 | 1994-09-06 | Minnesota Mining And Manufacturing Company | Spatially modified elastic laminates |
US5354597A (en) * | 1990-03-30 | 1994-10-11 | Minnesota Mining And Manufacturing Company | Elastomeric tapes with microtextured skin layers |
US5462708A (en) * | 1992-06-19 | 1995-10-31 | Minnesota Mining And Manufacturing Company | Elastic film laminate |
US5501675A (en) * | 1994-12-27 | 1996-03-26 | Becton, Dickinson And Company | Safety catheter assembly having safety stop push button |
US5605729A (en) * | 1993-04-16 | 1997-02-25 | Minnesota Mining And Manufacturing Company | Loop fastener material storage/dispensing assembly |
US5616394A (en) * | 1988-05-13 | 1997-04-01 | Minnesota Mining And Manufacturing Company | Sheet of loop material, and garments having such loop material incorporated therein |
US5891549A (en) * | 1996-10-15 | 1999-04-06 | Tenax S.P.A. | Sheet-like structure with surface protrusions for providing spacing, grip-enhancing, draining elements and the like |
US6132660A (en) * | 1997-06-19 | 2000-10-17 | 3M Innovative Properties Company | Method for forming headed stem mechanical fasteners |
US6209177B1 (en) * | 1998-01-22 | 2001-04-03 | Ykk Corporation | Molded surface fastener, and molding method and molding apparatus of the same |
US6366097B1 (en) * | 2000-04-26 | 2002-04-02 | Verizon Laboratories Inc. | Technique for the measurement of reflection coefficients in stored energy systems |
US20020112325A1 (en) * | 2000-12-18 | 2002-08-22 | Cape Cod Research, Inc. | Drapable surface fastener and method of using same |
US20030034583A1 (en) * | 2000-03-14 | 2003-02-20 | Velcro Industries B.V. | Stretchable fastener |
US20050079321A1 (en) * | 2003-10-14 | 2005-04-14 | 3M Innovative Properties Company | Hook fastener and method of making |
US20050079315A1 (en) * | 2003-10-14 | 2005-04-14 | 3M Innovative Properties Comapny | Disposable cleaning implement |
US20050131364A1 (en) * | 2002-05-22 | 2005-06-16 | Uni-Charm Corporation | Disposable short panties and method for producing the same (disposable undergarment and method for manufacturing the same) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US112325A (en) * | 1871-03-07 | Improvement in toy-horses and carriages | ||
JPH07358B2 (en) * | 1988-11-09 | 1995-01-11 | 日本石油化学株式会社 | Weather-resistant reticulated split membrane, its nonwoven fabric, and its manufacturing method |
US5339499A (en) * | 1993-02-16 | 1994-08-23 | Velcro Industries B.V. | Hook design for a hook and loop fastener |
US6039911A (en) | 1997-01-09 | 2000-03-21 | 3M Innovative Properties Company | Method for capping stem fasteners |
US7048984B2 (en) * | 2003-02-28 | 2006-05-23 | 3M Innovative Properties Company | Net structure and method of making |
-
2003
- 2003-02-28 US US10/376,979 patent/US7048984B2/en not_active Expired - Fee Related
- 2003-11-12 US US10/706,530 patent/US7235202B2/en not_active Expired - Fee Related
-
2004
- 2004-01-05 CN CNB2004800055051A patent/CN100558269C/en not_active Expired - Fee Related
- 2004-01-07 TW TW93100362A patent/TWI291921B/en active
- 2004-02-25 AR ARP040100586 patent/AR043391A1/en not_active Application Discontinuation
-
2006
- 2006-02-06 US US11/347,945 patent/US20060145387A1/en not_active Abandoned
Patent Citations (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3266113A (en) * | 1963-10-07 | 1966-08-16 | Minnesota Mining & Mfg | Interreacting articles |
US3488415A (en) * | 1965-07-21 | 1970-01-06 | Smith & Nephew | Production of net-like fabrics from plastic material |
US3557413A (en) * | 1968-09-23 | 1971-01-26 | William H Engle | Nonmechanical closure |
US4056593A (en) * | 1971-03-26 | 1977-11-01 | Repla International S.A.H. | Method of making a fastener |
US3952127A (en) * | 1971-12-07 | 1976-04-20 | Netion Limited | Extrusion of plastics netting |
US4001366A (en) * | 1972-01-03 | 1977-01-04 | Ingrip Fasteners Inc. | Method for making self-gripping devices having integral trains of gripping elements |
US3781398A (en) * | 1972-05-11 | 1973-12-25 | American Velcro Inc | Hook fastener element and method of manufacture |
US3932090A (en) * | 1973-01-31 | 1976-01-13 | Ingrip Fasteners, Inc. | Adjustable extrusion apparatus for producing thread-like products |
US4075379A (en) * | 1974-06-19 | 1978-02-21 | Smith & Nephew Plastics Limited | Melt-embossed polymer film |
US4189809A (en) * | 1976-11-10 | 1980-02-26 | Repla International S.A.H. | Fastener device and method of manufacturing |
US4201814A (en) * | 1977-07-02 | 1980-05-06 | John Francis Gilbert | Mesh structures |
US5011642A (en) * | 1987-06-05 | 1991-04-30 | Minnesota Mining And Manufacturing Company | Method of making extruded article |
US4894060A (en) * | 1988-01-11 | 1990-01-16 | Minnesota Mining And Manufacturing Company | Disposable diaper with improved hook fastener portion |
US5616394A (en) * | 1988-05-13 | 1997-04-01 | Minnesota Mining And Manufacturing Company | Sheet of loop material, and garments having such loop material incorporated therein |
US4832834A (en) * | 1988-07-11 | 1989-05-23 | Baird Jr Howard R | Elastomer sieve screen |
US5344691A (en) * | 1990-03-30 | 1994-09-06 | Minnesota Mining And Manufacturing Company | Spatially modified elastic laminates |
US5354597A (en) * | 1990-03-30 | 1994-10-11 | Minnesota Mining And Manufacturing Company | Elastomeric tapes with microtextured skin layers |
US5179767A (en) * | 1990-07-16 | 1993-01-19 | Allan Robert M | Connector apparatus |
US5462708A (en) * | 1992-06-19 | 1995-10-31 | Minnesota Mining And Manufacturing Company | Elastic film laminate |
US5605729A (en) * | 1993-04-16 | 1997-02-25 | Minnesota Mining And Manufacturing Company | Loop fastener material storage/dispensing assembly |
US5501675A (en) * | 1994-12-27 | 1996-03-26 | Becton, Dickinson And Company | Safety catheter assembly having safety stop push button |
US5891549A (en) * | 1996-10-15 | 1999-04-06 | Tenax S.P.A. | Sheet-like structure with surface protrusions for providing spacing, grip-enhancing, draining elements and the like |
US6132660A (en) * | 1997-06-19 | 2000-10-17 | 3M Innovative Properties Company | Method for forming headed stem mechanical fasteners |
US6209177B1 (en) * | 1998-01-22 | 2001-04-03 | Ykk Corporation | Molded surface fastener, and molding method and molding apparatus of the same |
US20030034583A1 (en) * | 2000-03-14 | 2003-02-20 | Velcro Industries B.V. | Stretchable fastener |
US6366097B1 (en) * | 2000-04-26 | 2002-04-02 | Verizon Laboratories Inc. | Technique for the measurement of reflection coefficients in stored energy systems |
US20020112325A1 (en) * | 2000-12-18 | 2002-08-22 | Cape Cod Research, Inc. | Drapable surface fastener and method of using same |
US20050131364A1 (en) * | 2002-05-22 | 2005-06-16 | Uni-Charm Corporation | Disposable short panties and method for producing the same (disposable undergarment and method for manufacturing the same) |
US20050079321A1 (en) * | 2003-10-14 | 2005-04-14 | 3M Innovative Properties Company | Hook fastener and method of making |
US20050079315A1 (en) * | 2003-10-14 | 2005-04-14 | 3M Innovative Properties Comapny | Disposable cleaning implement |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040170802A1 (en) * | 2003-02-28 | 2004-09-02 | Jayshree Seth | Net structure and method of making |
US7235202B2 (en) * | 2003-02-28 | 2007-06-26 | 3M Innovative Properties Company | Net structure and method of making |
US20130231455A1 (en) * | 2010-11-26 | 2013-09-05 | Kaneka Corporation | Stretched film and method for producing the same |
US9868248B2 (en) * | 2010-11-26 | 2018-01-16 | Kaneka Corporation | Stretched film and method for producing the same |
US20210252750A1 (en) * | 2017-12-21 | 2021-08-19 | Velcro Ip Holdings Llc | Molding resin to form continuous structures |
Also Published As
Publication number | Publication date |
---|---|
US7235202B2 (en) | 2007-06-26 |
CN100558269C (en) | 2009-11-11 |
TW200508028A (en) | 2005-03-01 |
US7048984B2 (en) | 2006-05-23 |
US20040170801A1 (en) | 2004-09-02 |
CN1756493A (en) | 2006-04-05 |
TWI291921B (en) | 2008-01-01 |
US20040170802A1 (en) | 2004-09-02 |
AR043391A1 (en) | 2005-07-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7048984B2 (en) | Net structure and method of making | |
US20070210477A1 (en) | Net structure and method of making | |
US7765651B2 (en) | Multiheaded hook | |
US20070110953A1 (en) | Hook fiber | |
US7052636B2 (en) | Heat treated profile extruded hook | |
US7241483B2 (en) | Reticulated webs and method of making | |
EP1467639B1 (en) | Heat treated profile extruded hook | |
US6054091A (en) | J hook-type hook strip for a mechanical fastener | |
US20060131776A1 (en) | Split hook fastener | |
US20030182776A1 (en) | Heat treated profile extruded hook | |
WO2003059108A2 (en) | Heat treated extruded hook fastener |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: EXPRESSLY ABANDONED -- DURING EXAMINATION |