EP0747518A1 - Heat-bondable woven or knitted fabric - Google Patents

Heat-bondable woven or knitted fabric Download PDF

Info

Publication number
EP0747518A1
EP0747518A1 EP94925018A EP94925018A EP0747518A1 EP 0747518 A1 EP0747518 A1 EP 0747518A1 EP 94925018 A EP94925018 A EP 94925018A EP 94925018 A EP94925018 A EP 94925018A EP 0747518 A1 EP0747518 A1 EP 0747518A1
Authority
EP
European Patent Office
Prior art keywords
woven
knitted fabric
filaments
heat
wefts
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.)
Granted
Application number
EP94925018A
Other languages
German (de)
French (fr)
Other versions
EP0747518A4 (en
EP0747518B1 (en
Inventor
Shinsuke Kohei Co. Ltd. NOTO
Makoto Tamura
Toyoaki Marubeni Co. Ltd. TANAKA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KOHEI CO Ltd
Original Assignee
KOHEI CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KOHEI CO Ltd filed Critical KOHEI CO Ltd
Publication of EP0747518A1 publication Critical patent/EP0747518A1/en
Publication of EP0747518A4 publication Critical patent/EP0747518A4/en
Application granted granted Critical
Publication of EP0747518B1 publication Critical patent/EP0747518B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/49—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads textured; curled; crimped
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/47—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads multicomponent, e.g. blended yarns or threads
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
    • D03D15/587—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads adhesive; fusible
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
    • D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/04—Heat-responsive characteristics
    • D10B2401/041—Heat-responsive characteristics thermoplastic; thermosetting

Definitions

  • This invention relates to a woven or knitted fabric used for making various textile products such as bags, which enables strong bond strength to be achieved with heat boding yet with no need of sewing at least two woven or knitted fabric pieces.
  • the bonding of woven or knitted fabrics made of synthetic fibers having thermoplasticity is often carried out by conventional machine-sewing, except when thin woven or knitted fabrics not required to have strong bond strength are bonded together by a combined sealing and cutting technique.
  • Synthetic fibers of thermoplasticity are heat-bonded together with a temperature rise while they shrink by the action of heat. Therefore, when the temperature of a seal bar is kept higher than the heat-bonding temperature, no stable bonding of woven or knitted fabrics is achievable because they shrink concurrently upon coming into contact with the seal bar.
  • An object of the present invention is to provide a woven or knitted fabric which enables textile products having the necessary and sufficient bond strength to be fabricated by a heat-bonding technique while they are kept from shrinkage.
  • the present invention provides a woven or knitted fabric which is textured from at least two types of synthetic fiber yarns of thermoplasticity, between which there is a melting point difference of at least 20°C.
  • two or more types of yarns having a certain melting point difference are incorporated.
  • the sites of the woven or knitted fabric to be bonded together is heated under pressure at a temperature higher than the low melting point of one type of yarns and lower than the high melting point of the other type of yarns, the low-melting yarns melt to have bonding action while the high-melting yarns serve to keep the low-melting yarn from shrinkage that occurs within the period during which the low-melting yarns soften and finally melt, so that the bonded sites can be maintained constant in terms of dimensional stability.
  • the melting point difference of at least 20°C is here understood to define a temperature difference for keeping the high-melting yarns from softening and shrinkage when the woven or knitted fabric is heated under pressure at the low-melting temperature.
  • FIG. 1 shows the texture of one preferable woven or knitted fabric according to this invention.
  • FIG. 1 is a partly plan view of the texture of one embodiment of the woven or knitted fabric according to the present invention.
  • a woven or knitted fabric (A) is textured from yarns which vary in melting point.
  • the woven or knitted fabric is textured from warps (1), each consisting of 24 polyester (m.p.: 250°C) filaments of 50 deniers, and wefts (2), each consisting of polypropylene (m.p.: 160°C) filaments, say, 24 filaments of 50 deniers plus 24 filaments of 75 deniers.
  • the polypropylene wefts serve as an adhesive agent while he polyester warps remain intact.
  • warps (2') lower than in melting point than warps (1) and wefts (2) and warps (1) and wefts (2) may be used, either warps (1) or wefts (2) may be made of a material having a varying melting point.
  • a woven or knitted fabric textured from such yarns it is textured from warps, each consisting of one polyester filament of 20 denies, and wefts, each having a combined core and sheath structure consisting of 12 polyester filaments of 30 deniers, the latter being different in melting point from the former.
  • the melting point of the sheaths is lower than those of the warps and the cores of the wefts.
  • the sheaths of the wefts serve as an adhesive agent while the warps and the cores of the wefts remain intact.
  • FIG. 1 is directed to an example where one yarn is separated into a core and sheath for the purpose of illustration alone, it may be separated any desired parts or the like.
  • the woven or knitted fabric according to the present invention is textured from yarns varying in melting point, so that it can be heat-bonded while the yarns having a lower melting point are used as an adhesive agent.
  • the instant fabric is much more improved in terms of fabrication cost and time and, hence, operation efficiency, and so is best suited for products to be bonded at numerous sites, for instance, bags.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Multicomponent Fibers (AREA)

Abstract

The invention provides an easily heat-bondable woven or knitted fabric for which neither sewing nor an adhesive agent is need. A woven or knitted fabric (A) is textured from warps (1), each consisting of 24 polyester (m.p.: 250°C) filaments of 50 deniers, and wefts (2), each consisting of polypropylene (m.p.: 160°C) filaments, say, 24 filaments of 50 deniers plus 24 filaments of 75 deniers, between which there is a melting point difference of at least 20°C. The sites of the fabric to be bonded together are heated under pressure at a temperature higher than or equal to 160°C and lower than or equal to 250°C. The polypropylene wefts melt to serve as an adhesive agent while the polyester warps remain intact.

Description

    FIELD OF THE INVENTION
  • This invention relates to a woven or knitted fabric used for making various textile products such as bags, which enables strong bond strength to be achieved with heat boding yet with no need of sewing at least two woven or knitted fabric pieces.
    • BACKGROUND TECHNIQUE
  • As generally known so far in the art, woven or knitted fabrics are bonded together by machine-sewing.
  • The bonding of woven or knitted fabrics made of synthetic fibers having thermoplasticity, too, is often carried out by conventional machine-sewing, except when thin woven or knitted fabrics not required to have strong bond strength are bonded together by a combined sealing and cutting technique.
  • As well known in the art, machine-sewing is labor-intensive operations unsuitable for mass fabrication, and the combined sealing and cutting technique is practically unacceptable for lack of any bond strength, especially for lack of any sealing strength for woven or knitted fabrics of at least 40 g/m2 in basis weight.
  • Thus, what becomes a problem when woven or knitted fabrics are bonded together by heat-bonding yet without recourse to sewing is the bond strength of sites where they are bonded together.
  • Films are bonded together over certain surfaces, while woven or knitted fabrics are bonded together at points. Under the same conditions, therefore, the woven or knitted fabrics are weaker than the films due to a bonded area difference between them.
  • In the case of heat-bonding, woven or knitted fabrics must thus be wider in sealing area than films, etc. In other words, it is required to use a wider seal bar for heat-bonding purposes.
  • Synthetic fibers of thermoplasticity are heat-bonded together with a temperature rise while they shrink by the action of heat. Therefore, when the temperature of a seal bar is kept higher than the heat-bonding temperature, no stable bonding of woven or knitted fabrics is achievable because they shrink concurrently upon coming into contact with the seal bar.
  • An object of the present invention is to provide a woven or knitted fabric which enables textile products having the necessary and sufficient bond strength to be fabricated by a heat-bonding technique while they are kept from shrinkage.
    • DISCLOSURE OF THE INVENTION
  • The present invention provides a woven or knitted fabric which is textured from at least two types of synthetic fiber yarns of thermoplasticity, between which there is a melting point difference of at least 20°C.
  • In the texture of the woven or knitted fabric, two or more types of yarns having a certain melting point difference are incorporated. When the sites of the woven or knitted fabric to be bonded together is heated under pressure at a temperature higher than the low melting point of one type of yarns and lower than the high melting point of the other type of yarns, the low-melting yarns melt to have bonding action while the high-melting yarns serve to keep the low-melting yarn from shrinkage that occurs within the period during which the low-melting yarns soften and finally melt, so that the bonded sites can be maintained constant in terms of dimensional stability.
  • The melting point difference of at least 20°C is here understood to define a temperature difference for keeping the high-melting yarns from softening and shrinkage when the woven or knitted fabric is heated under pressure at the low-melting temperature.
    • BRIEF DESCRIPTION OF THE DRAWING
  • FIG. 1 shows the texture of one preferable woven or knitted fabric according to this invention.
    • BEST MODE FOR CARRYING OUT THE INVENTION
  • The present invention will now be explained more specifically with reference to the accompanying drawing.
  • FIG. 1 is a partly plan view of the texture of one embodiment of the woven or knitted fabric according to the present invention.
  • A woven or knitted fabric (A) is textured from yarns which vary in melting point. As an example, the woven or knitted fabric is textured from warps (1), each consisting of 24 polyester (m.p.: 250°C) filaments of 50 deniers, and wefts (2), each consisting of polypropylene (m.p.: 160°C) filaments, say, 24 filaments of 50 deniers plus 24 filaments of 75 deniers.
  • When the sites of the fabric to be bonded together are heated under pressure at a temperature higher than or equal to 160°C and lower than or equal to 250°C, the polypropylene wefts serve as an adhesive agent while he polyester warps remain intact.
  • It is here to be understood that while warps (2') lower than in melting point than warps (1) and wefts (2) and warps (1) and wefts (2) may be used, either warps (1) or wefts (2) may be made of a material having a varying melting point.
  • Referring now to one example of a woven or knitted fabric textured from such yarns, it is textured from warps, each consisting of one polyester filament of 20 denies, and wefts, each having a combined core and sheath structure consisting of 12 polyester filaments of 30 deniers, the latter being different in melting point from the former.
  • In this case, the melting point of the sheaths is lower than those of the warps and the cores of the wefts. Upon heated under pressure, the sheaths of the wefts serve as an adhesive agent while the warps and the cores of the wefts remain intact.
  • It is to be noted that while FIG. 1 is directed to an example where one yarn is separated into a core and sheath for the purpose of illustration alone, it may be separated any desired parts or the like.
    • APPLICABILITY OF THE INVENTION TO INDUSTRY
  • As explained above, the woven or knitted fabric according to the present invention is textured from yarns varying in melting point, so that it can be heat-bonded while the yarns having a lower melting point are used as an adhesive agent. Over conventional fabrics fabricated by heat-bonding using an adhesive film or otherwise sewing, therefore, the instant fabric is much more improved in terms of fabrication cost and time and, hence, operation efficiency, and so is best suited for products to be bonded at numerous sites, for instance, bags.

Claims (1)

  1. A woven or knitted fabric characterized in that it is textured from at least two types of synthetic yarns of thermoplasticity, between which there is a melting point difference of at least 20°C.
EP94925018A 1993-08-30 1994-08-29 Heat-bondable woven or knitted fabric Expired - Lifetime EP0747518B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP5238735A JPH0770872A (en) 1993-08-30 1993-08-30 Woven and knitted fabric that can be heat-welded
JP238735/93 1993-08-30
JP23873593 1993-08-30
PCT/JP1994/001421 WO1995006768A1 (en) 1993-08-30 1994-08-29 Heat-bondable woven or knitted fabric

Publications (3)

Publication Number Publication Date
EP0747518A1 true EP0747518A1 (en) 1996-12-11
EP0747518A4 EP0747518A4 (en) 1997-08-27
EP0747518B1 EP0747518B1 (en) 2002-05-02

Family

ID=17034484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94925018A Expired - Lifetime EP0747518B1 (en) 1993-08-30 1994-08-29 Heat-bondable woven or knitted fabric

Country Status (5)

Country Link
EP (1) EP0747518B1 (en)
JP (1) JPH0770872A (en)
AU (1) AU7508994A (en)
TW (1) TW308187U (en)
WO (1) WO1995006768A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1908581A1 (en) * 2006-10-05 2008-04-09 Novameer B.V. Process for producing fabrics comprising unidirectionally arranged polymeric tapes
US9243354B2 (en) 2013-03-15 2016-01-26 Honeywell International Inc. Stab and ballistic resistant articles
US9243355B2 (en) 2013-03-15 2016-01-26 Honeywell International Inc. Ballistic resistant thermoplastic sheet, process of making and its applications
US20170275790A1 (en) * 2013-03-15 2017-09-28 Honeywell International Inc. Breathable light weight unidirectional laminates
DE102019208734A1 (en) * 2019-06-14 2020-12-17 Adidas Ag Abrasion-resistant material and manufacturing process
WO2024184082A1 (en) * 2023-03-03 2024-09-12 Novem Car Interior Design Gmbh Shaped part and method for producing the shaped part

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* Cited by examiner, † Cited by third party
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CN104278620B (en) * 2014-09-29 2016-09-14 北京工业大学 The ball of Self-resetting can enter formula winged and wave shock insulation pier stud
KR102576056B1 (en) 2015-11-06 2023-09-08 인비스타 텍스타일스 (유.케이.) 리미티드 Low transmittance and high strength fabric and manufacturing method thereof
CN110603173B (en) 2017-05-02 2021-12-28 英威达纺织（英国）有限公司 Low permeability and high strength woven fabrics and methods of making same
WO2019067655A1 (en) 2017-09-29 2019-04-04 Invista Textiles (U.K.) Limited Airbags and methods for production of airbags
JP7124517B2 (en) * 2018-07-25 2022-08-24 東亞合成株式会社 Hot-melt adhesive sheet
TWI725409B (en) * 2019-04-03 2021-04-21 三芳化學工業股份有限公司 Knitted structure and manufacturing method thereof

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FR2364284A1 (en) * 1976-09-10 1978-04-07 Payen & Cie L PROCESS FOR THE MANUFACTURE OF A RIGID SLITTED SHAFT AND SHOES THUS REALIZED
JPS5756780U (en) * 1980-09-19 1982-04-02
JPS6147847A (en) * 1984-08-07 1986-03-08 チッソ株式会社 Fire retardant spring receiving material
JPH01321947A (en) * 1988-06-20 1989-12-27 Hagiwara Kogyo Kk Netty product
JP2969380B2 (en) * 1989-12-28 1999-11-02 鐘紡株式会社 Mesh fabric for printing screen and its manufacturing method
JPH0433977A (en) * 1990-05-29 1992-02-05 Kuraray Co Ltd Base fabric for tacky tape and production thereof
IL99296A (en) * 1990-08-28 1995-12-08 Meadox Medicals Inc Self-supporting woven vascular graft and its preparation

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1908581A1 (en) * 2006-10-05 2008-04-09 Novameer B.V. Process for producing fabrics comprising unidirectionally arranged polymeric tapes
WO2008040510A1 (en) * 2006-10-05 2008-04-10 Novameer B.V. Process for producing fabrics comprising unidirectionally arranged polymeric tapes
AU2007304495B2 (en) * 2006-10-05 2011-09-15 Novameer B.V. Process for producing fabrics comprising unidirectionally arranged polymeric tapes
US8349112B2 (en) 2006-10-05 2013-01-08 Novameer B.V. Process for producing fabrics comprising unidirectionally arranged polymeric tapes
CN101522406B (en) * 2006-10-05 2013-04-17 诺瓦摩尔有限公司 Method of making fabric comprising unidirectionally aligned polymer strips
US9994977B2 (en) 2013-03-15 2018-06-12 Honeywell International Inc. Ballistic resistant thermoplastic sheet, process of making and its applications
US9243355B2 (en) 2013-03-15 2016-01-26 Honeywell International Inc. Ballistic resistant thermoplastic sheet, process of making and its applications
US20170275790A1 (en) * 2013-03-15 2017-09-28 Honeywell International Inc. Breathable light weight unidirectional laminates
US9243354B2 (en) 2013-03-15 2016-01-26 Honeywell International Inc. Stab and ballistic resistant articles
US20180274135A1 (en) * 2013-03-15 2018-09-27 Honeywell International Inc. Ballistic resistant thermoplastic sheet, process of making and its applications
US10252488B2 (en) 2013-03-15 2019-04-09 Honeywell International Inc. Stab and ballistic resistant articles and the process of making
US10443160B2 (en) 2013-03-15 2019-10-15 Honeywell International Inc. Breathable light weight unidirectional laminates
US10494746B2 (en) 2013-03-15 2019-12-03 Honeywell International Inc. Ballistic resistant thermoplastic sheet, process of making and its applications
US10703069B2 (en) 2013-03-15 2020-07-07 Honeywell International Inc. Stab and ballistic resistant articles and the process of making
US11053617B2 (en) 2013-03-15 2021-07-06 Honeywell International Inc. Ballistic resistant thermoplastic sheet, process of making and its applications
DE102019208734A1 (en) * 2019-06-14 2020-12-17 Adidas Ag Abrasion-resistant material and manufacturing process
WO2024184082A1 (en) * 2023-03-03 2024-09-12 Novem Car Interior Design Gmbh Shaped part and method for producing the shaped part

Also Published As

Publication number Publication date
WO1995006768A1 (en) 1995-03-09
EP0747518A4 (en) 1997-08-27
JPH0770872A (en) 1995-03-14
EP0747518B1 (en) 2002-05-02
TW308187U (en) 1997-06-11
AU7508994A (en) 1995-03-22

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