IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0864836
(1977-12-27)
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발명자
/ 주소 |
- Civardi, Frank P.
- Loew, Frederic C.
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출원인 / 주소 |
- Milliken Research Corporation
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대리인 / 주소 |
Marden, Earle R.Petry, H. William
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인용정보 |
피인용 횟수 :
133 인용 특허 :
1 |
초록
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An artificial leather sheet material, comprising a layer of permeable fabric made of interlaced multifiber yarns, the lower face of said fabric having an open nap of fibers teased from said yarns and bonded together, and a continuous layer of polymer material on the upper face of said fabric. The bo
An artificial leather sheet material, comprising a layer of permeable fabric made of interlaced multifiber yarns, the lower face of said fabric having an open nap of fibers teased from said yarns and bonded together, and a continuous layer of polymer material on the upper face of said fabric. The bonded nap may be subjected to spaced short cuts to give it a rough appearance.
대표청구항
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1. An artificial leather sheet material for lasted shoe uppers comprising a backing layer of permeable fabric of interlaced multifilament yarns and a continuous cellular layer of blown plasticized polyvinyl chloride on its upper face wherein the improvement comprises that the lower face of said fabr
1. An artificial leather sheet material for lasted shoe uppers comprising a backing layer of permeable fabric of interlaced multifilament yarns and a continuous cellular layer of blown plasticized polyvinyl chloride on its upper face wherein the improvement comprises that the lower face of said fabric has a nap of fibers teased from said yarns and bonded together, said bonded nap being open and compressible, having a void volume about 50% and a thickness of about 0.1 to 1 mm, said shoe upper sheet material having a thickness of at least about 1.2 mm, said bonded nap comprising said teased-out fibers and an elastomeric bonding agent. 2. Product as in claim 1 in which said fabric is a woven fabric. 3. Product as in claim 2 in which said fabric comprises cellulosic fibers. 4. Product as in claim 2 in which said fabric comprises thermoplastic organic polymeric fibers. 5. Product as in claim 1 in which said cellular layer has a continuous substantially non-porous skin at its upper surface. 6. Product as in claim 1 in which the void volume of said bonded nap is above 70%. 7. Product as in claim 1 in which the bulk specific gravity of the bonding agent in the nap zone is at most about 0.5. 8. Product as in claim 1 in which the interlaced fabric structure is substantially free of bonding agent but said bonding agent is in contact with surfaces of the multi-fiber yarns at the base of said nap. 9. Product as in claim 1 in which the thickness of said bonded nap is about 0.1 to 0.7 mm. 10. Product as in claim 5, the combined thickness of said cellular layer and said skin being about 0.2 to 1.5 mm. 11. Product as in claim 10 in which the specific gravity of said cellular layer is less than about 0.6 and the specific gravity of said skin is at least 0.9. 12. Product as in claim 11 in which said yarns are twisted staple fiber yarns, the total weight of fibers in said interlaced fabric and the nap thereof is at least 200 g/m 2 and said fibers are largely thermoplastic staple fibers. 13. Product as in claim 12 in which said thermoplastic staple fibers are largely polyethylene terephthalate and said total weight is in the range of about 200 to 300 g/m 2 . 14. Product as in claim 12 in which said thermoplastic staple fibers are largely stereoregular polypropylene and said total weight is in the range of about 200 to 300 g/m 2 . 15. Product as in claim 12 in which said bonded nap comprises said teased-out fibers and an elastomeric bonding agent therefor, and said bonding agent is present as webs joining individual filaments of the nap, said webs being so thin that the outlines of individual nap fibers are visible, said bonded nap being open, compressible and having the feel of a fabric surface and having a void volume above 50%, and in which said webs bridge neighboring fibers, but do not form a continuous pore-free layer, there being impregnant-free spaces between fibers, said void volume being over 70%, said fabric having at least 3000 yarn cross overs per square inch. 16. Product as in claim 12 in which said bonded nap comprises said teased-out fibers and an elastomeric bonding agent therefor and said bonding agent is present as nodules deposited from a dispersion of particles of said agent. 17. In the process for making artificial leather sheet material for shoe uppers in which a continuous cellular plasticized polyvinyl chloride layer is applied to a fabric, the improvement which comprises providing a fabric having an interlaced structure of multifiber twisted yarns, teasing from yarns of said fabric a nap of fibers anchored within said twisted yarns, bonding together fibers of said nap to form an open, compressible bonded nap having a thickness of about 0.1 to 1 mm and applying a layer of a mixture of polyvinyl chloride, plasticizer therefor and blowing agent to the face of the fabric opposite to said nap, and heating said layer of mixture to form said cellular layer, the thickness of said polymer layer and said fabric being such that the total thickness of said artificial leather sheet material is at least about 1.2 mm, said bonding comprising applying to said nap a solution of an elastomeric bonding agent without substantial impregnation of the interlaced yarn structure of said fabric, and removing liquid of said solution to set said bonding agent while maintaining said nap in such open condition that the void volume of the bonded nap is at least 50%, the conditions of said impregnation and removing being such that the set bonding agent is present as webs joining individual filaments of the nap, said webs being so thin that the outlines of individual nap fibers are visible, and said webs bridge neighboring fibers, but do not form a continuous pore-free layer, there being impregnant-free spaces between fibers. 18. In the process for making artificial leather sheet material for shoe uppers in which a continuous cellular plasticized polyvinyl chloride layer is applied to a fabric, the improvement which comprises providing a fabric having an interlaced structure of multifiber twisted yarns, teasing from yarns of said fabric a nap of fibers anchored within said twisted yarns, bonding together fibers of said nap to form an open, compressible bonded nap having a thickness of about 0.1 to 1 mm and applying a layer of a mixture of polyvinyl chloride, plasticizer therefor and blowing agent to the face of the fabric opposite to said nap, and heating said layer of mixture to form said cellular layer, the thickness of said polymer layer and said fabric being such that the total thickness of said artificial leather sheet material is at least about 1.2 mm, said bonding comprising applying to said nap a dispersion of particles of an elastomeric bonding agent in a liquid and removing liquid of said dispersion to set said bonding agent while maintaining said nap in such open condition that the void volume of the bonded nap is at least 50%. 19. Process as in claim 18 in which said bonding is effected after the application of said polymer layer. 20. Process as in claim 18 in which said bonding is effected before the application of said polymer layer. 21. Process as in claim 18 in which said dispersion is an aqueous latex. 22. A lasted shoe upper of the material of claim 1. 23. A lasted shoe upper of the material of claim 15. 24. Process as in claim 18 in which said cellular layer is applied by forming a layer of polyvinyl chloride plastisol containing blowing agent on a release backer, heating said plastisol layer to get it and make it tacky, laying the fabric onto said tacky layer so that said tacky layer is in contact with the face of the fabric which is opposite said nap, and heating the resulting assembly to cause blowing of said plastisol layer and then cooling said assembly and stripping it from the release backer. 25. Process as in claim 24 in which said elastomeric bonding agent is cross-linked after it is applied. 26. Product as in claim 1 in which said elastomeric bonding agent is cross-linked. 27. Product as in claim 26 in which said cross-linked elastomeric bonding agent is a polyurethane. 28. Product as in claim 26 in which said cross-linked elastomeric bonding agent is a rubbery butadiene-acrylonitrile copolymer. 29. Product as in claim 1 in which the bonding of said nap fibers is such as to have no substantial effect on the breathability of the product, the napped fabric is a woven fabric which, as such and without bonding of the nap, has a trouser tear strength of at least about 7 pounds in both warp and filling direction and an elongation at break of at least 10%, said fabric being woven in a pattern having repeating lengths of yarn spinning at least two transverse yarns, said void volume being over 70%, said fabric having at least 3000 yarn cross overs per square inch, and a weight, of fibers, of about 6 to 9 ounces per square yard, the amount of bonding agent being a minor proportion of the total weight of the fabric. 30. Product as in claim 29 in which said woven fabric is woven in a 4/1 sateen weave. 31. Product as in claim 30 in which said elastomeric bonding agent is a cross-linked polyurethane. 32. Product as in claim 30 in which said elastomeric bonding agent is a cross-linked rubbery butadiene-acrylonitrile copolymer. 33. Product as in claim 11 in which the void volume of said bonded nap is above 70%, the thickness of said bonded nap is about 0.1 to 0.5 mm, the total weight of fibers in said interlaced fabric and the nap thereof is at least 200 g/m 2 and said yarns comprise twisted staple fiber yarns containing polyethylene terephthalate fibers. 34. Product as in claim 33 in which said total weight of fibers is in the range of about 200 to 300 g/m 2 and said fabric is a 4/1 sateen having at least about 3000 yarn cross-overs per square inch. 35. Product as in claim 34 in which said bonding agent is present as nodules on the nap fibers. 36. Product as in claim 34 in which the nap is unsheared.
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