US20140325802A1 - Stacked Polymer Technology An Alternating Polymer Extrusion Process And Product - Google Patents

Stacked Polymer Technology An Alternating Polymer Extrusion Process And Product Download PDF

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Publication number
US20140325802A1
US20140325802A1 US14/334,699 US201414334699A US2014325802A1 US 20140325802 A1 US20140325802 A1 US 20140325802A1 US 201414334699 A US201414334699 A US 201414334699A US 2014325802 A1 US2014325802 A1 US 2014325802A1
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polymer
fastener
segments
polymer segments
continuous core
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Abandoned
Application number
US14/334,699
Inventor
Bryan A. Norcott
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Individual
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Priority to US14/334,699 priority Critical patent/US20140325802A1/en
Publication of US20140325802A1 publication Critical patent/US20140325802A1/en
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Classifications

    • 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
    • A44B18/0073—Attaching means
    • 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
    • A44B18/0049—Fasteners made integrally of plastics obtained by moulding processes
    • 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
    • A44B18/0065—Male or hook elements of a mushroom type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/185—Articles comprising two or more components, e.g. co-extruded layers the components being layers comprising six or more components, i.e. each component being counted once for each time it is present, e.g. in a layer
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/34—Core-skin structure; Spinnerette packs therefor
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps
    • B29C48/37—Gear pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/387—Plasticisers, homogenisers or feeders comprising two or more stages using a screw extruder and a gear pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
    • 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]
    • Y10T24/2725—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] with feature facilitating, enhancing, or causing attachment of filament mounting surface to support therefor
    • 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]
    • Y10T24/2783—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 filaments constructed from coated, laminated, or composite 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
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]

Definitions

  • the present invention is in the technical field of Polymer Extrusion.
  • the present invention is a process which will produce a multi component extrusion in an arrangement placing one type of polymer directly behind the other in a continuous extrusion process alternating each different type of polymer in order to produce new product possibilities that utilize these characteristics.
  • FIG. 1 is a schematic of the process of the present invention.
  • FIG. 2 is a perspective view of an example extruded product of the present invention.
  • FIG. 3 is a perspective view of an example extruded product after separation of the present invention.
  • FIG. 1 a schematic 10 is of a polymer extrusion process which utilizes two extruders; in this example one extruder will be using polypropylene 12 and the other polyester 14 .
  • extruder 12 and extruder 14 will be feeding gear pumps.
  • Gear pump 16 which is fed from extruder 12 will provide a metered stream of polypropylene while gear pump 18 which is fed from both extruders 12 and 14 will provide a metered stream of alternating polypropylene and polyester, one directly behind the other and so on.
  • gear pump 16 and gear pump 18 will feed a spin pack 20 .
  • Spin pack 20 will produce an extrusion commonly known in the industry as a sheath core.
  • the core will be the metered stream received from gear pump 16 and the sheath will be the alternating polymer stream received from gear pump 18 .
  • FIG. 2 there is shown an extruded product 50 having been extruded in a profile which resembles arrowheads in three places from spin pack 20 FIG. 1 .
  • One arrowhead segment 52 comprises of polypropylene while the other arrowhead segment 54 comprises of polyester. Both 52 and 54 would be considered the sheath of a sheath core product.
  • the core 56 comprises of polypropylene which links the continuous extruded product together.
  • extruded product 50 in a stretched or drawn state 100 .
  • Item 52 and item 54 are now separated but still linked to the core 56 . This is achievable because the properties of the two polymers do not allow adhesion. This process will work not only with polypropylene and polyester but any polymers that have similar properties.
  • the advantages of the present invention include, without limitation, the ability to produce an array of products that have characteristics that have never been available.
  • the one example shown with this process was a fiber or extrusion that has hooks on it which will engage with a loop of another material.
  • This example can be produced along with a non-woven material in a continuous process creating a new product that fastens to its self.
  • the present invention is a bi-component extrusion process that allows separation in the cross machine direction which previously was not possible.

Abstract

A bi-component process which produces an extrusion split able in the cross machine direction.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • Application No. 61/403,906, Filing Date: Sep. 23, 2010, Name of Applicant: Bryan A. Norcott Title of Invention: Stacked Polymer Technology. An alternating polymer extrusion process and product.
    • STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
  • Not Applicable
    • REFERENCE TO SEQUENCE LISTING, A TABLE, OR A COMPUTER PROGRAM LISTING COMPACT DISK APPENDIX
  • Not Applicable
    • BACKGROUND OF THE INVENTION
  • The present invention is in the technical field of Polymer Extrusion.
  • Conventional bi-component extrusion places the different types of polymers along side of each other in a continuous stream with mating seams running the length of the extruded product. This arrangement creates a variety of existing products with each one having specific characteristics running in the extruded direction of the product.
    • SUMMARY OF THE INVENTION
  • The present invention is a process which will produce a multi component extrusion in an arrangement placing one type of polymer directly behind the other in a continuous extrusion process alternating each different type of polymer in order to produce new product possibilities that utilize these characteristics.
    • BRIEF DESCRIPTION OF THE DRAWING
  • FIG. 1 is a schematic of the process of the present invention.
  • FIG. 2 is a perspective view of an example extruded product of the present invention.
  • FIG. 3 is a perspective view of an example extruded product after separation of the present invention.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • Referring now to the invention in more detail, in FIG. 1 a schematic 10 is of a polymer extrusion process which utilizes two extruders; in this example one extruder will be using polypropylene 12 and the other polyester 14.
  • In further detail, still referring to the invention of FIG. 1 extruder 12 and extruder 14 will be feeding gear pumps. Gear pump 16 which is fed from extruder 12 will provide a metered stream of polypropylene while gear pump 18 which is fed from both extruders 12 and 14 will provide a metered stream of alternating polypropylene and polyester, one directly behind the other and so on.
  • In further detail, gear pump 16 and gear pump 18 will feed a spin pack 20. Spin pack 20 will produce an extrusion commonly known in the industry as a sheath core. The core will be the metered stream received from gear pump 16 and the sheath will be the alternating polymer stream received from gear pump 18.
  • Referring now to FIG. 2 there is shown an extruded product 50 having been extruded in a profile which resembles arrowheads in three places from spin pack 20 FIG. 1. One arrowhead segment 52 comprises of polypropylene while the other arrowhead segment 54 comprises of polyester. Both 52 and 54 would be considered the sheath of a sheath core product. The core 56 comprises of polypropylene which links the continuous extruded product together.
  • Referring now to FIG. 3 there is shown extruded product 50 in a stretched or drawn state 100. Item 52 and item 54 are now separated but still linked to the core 56. This is achievable because the properties of the two polymers do not allow adhesion. This process will work not only with polypropylene and polyester but any polymers that have similar properties.
  • The advantages of the present invention include, without limitation, the ability to produce an array of products that have characteristics that have never been available. The one example shown with this process was a fiber or extrusion that has hooks on it which will engage with a loop of another material. This example can be produced along with a non-woven material in a continuous process creating a new product that fastens to its self.
  • In broad embodiment, the present invention is a bi-component extrusion process that allows separation in the cross machine direction which previously was not possible.
  • While the foregoing written description of the invention enables one of an experienced polymer extrusion back ground to make and use what is considered presently to be the best mode thereof, those of an experienced polymer extrusion back ground will understand and appreciate the existence of variations, combinations, and equivalents of the specific embodiment, method, and examples herein. The invention should therefore not be limited by the above described embodiment, method, and examples, but by all embodiments and methods within the scope and spirit of the invention.

Claims (17)

1-6. (canceled)
7. A fastener comprising:
a plurality of first polymer segments, each comprising at least one hook or barb;
a plurality of second polymer segments, each comprising at least one hook or barb, the plurality of first polymer segments and second polymer segments oriented in alternating order behind one another and separated apart from one another in a fastener lengthwise direction;
wherein the first polymer material is dissimilar from the second polymer material;
a continuous core of polymer linking each of the plurality of first polymer segments and plurality of second polymer segments.
8. The fastener of claim 7 wherein the first polymer material is polypropylene.
9. The fastener of claim 8 wherein the second polymer material is polyester.
10. The fastener of claim 7 wherein the continuous core is formed of polypropylene.
11. The fastener of claim 7 wherein the first polymer material and second polymer materials are selected to be non-adhering to each other.
12. The fastener of claim 7 wherein the hook or barb of each of the first and second plurality of polymer segments is configured to be engaged with a loop of another material.
13. The fastener of claim 7 wherein each of the plurality of first polymer segments and each of the plurality of second polymer segments have a same shape comprising three barbs extending from a circular base, the circular base defining a central aperture through which the continuous core extends, linking the plurality of segments.
14. The fastener of claim 13 wherein the three barbs of each of the plurality of first polymer segments and each of the plurality of second polymer segments are axially offset from one another about the central continuous core.
15. A fastener comprising:
a plurality of first polymer segments, each comprising at least one hook or barb;
a plurality of second polymer segments, each comprising at least one hook or barb, the plurality of first polymer segments and second polymer segments oriented in alternating order directly behind one another in a fastener lengthwise direction;
wherein the first polymer material is dissimilar from the second polymer material;
a continuous core of polymer linking each of the plurality of first polymer segments and plurality of second polymer segments.
16. The fastener of claim 15 wherein the first polymer material is polypropylene.
17. The fastener of claim 16 wherein the second polymer material is polyester.
18. The fastener of claim 15 wherein the continuous core is formed of polypropylene.
19. The fastener of claim 15 wherein the first polymer material and second polymer materials are selected to be non-adhering to each other.
20. The fastener of claim 15 wherein the hook or barb of each of the first and second plurality of polymer segments is configured to be engaged with a loop of another material.
21. The fastener of claim 15 wherein each of the plurality of first polymer segments and each of the plurality of second polymer segments have a same shape comprising three barbs extending from a circular base, the circular base defining a central aperture through which the continuous core extends, linking the plurality of segments.
22. The fastener of claim 21 wherein the three barbs of each of the plurality of first polymer segments and each of the plurality of second polymer segments are axially offset from one another about the central continuous core.
US14/334,699 2010-09-23 2014-07-18 Stacked Polymer Technology An Alternating Polymer Extrusion Process And Product Abandoned US20140325802A1 (en)

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US14/334,699 US20140325802A1 (en) 2010-09-23 2014-07-18 Stacked Polymer Technology An Alternating Polymer Extrusion Process And Product

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US40390610P 2010-09-23 2010-09-23
US13/199,182 US8815391B1 (en) 2010-09-23 2011-08-22 Stacked polymer technology. An alternating polymer extrusion process and product
US14/334,699 US20140325802A1 (en) 2010-09-23 2014-07-18 Stacked Polymer Technology An Alternating Polymer Extrusion Process And Product

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050091805A1 (en) * 1999-01-15 2005-05-05 Velcro Industries B.V., A Netherlands Corporation Methods of making fastener products
US6996880B2 (en) * 2003-04-01 2006-02-14 Velcro Industries B.V. Fastener elements and methods of manufacture
US7162780B2 (en) * 2001-02-26 2007-01-16 Velcro Industries B.V. Skin-friendly hook fastening component
US7172008B2 (en) * 2003-09-18 2007-02-06 Velcro Industries B.V. Hook fasteners and methods of making the same
US7182992B2 (en) * 2004-02-17 2007-02-27 3M Innovative Properties Company Hook fiber

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050091805A1 (en) * 1999-01-15 2005-05-05 Velcro Industries B.V., A Netherlands Corporation Methods of making fastener products
US7162780B2 (en) * 2001-02-26 2007-01-16 Velcro Industries B.V. Skin-friendly hook fastening component
US6996880B2 (en) * 2003-04-01 2006-02-14 Velcro Industries B.V. Fastener elements and methods of manufacture
US7172008B2 (en) * 2003-09-18 2007-02-06 Velcro Industries B.V. Hook fasteners and methods of making the same
US7182992B2 (en) * 2004-02-17 2007-02-27 3M Innovative Properties Company Hook fiber

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