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    ARTIFICIAL LEATHER AND A METHOD OF MANUFACTURING THE SAME
    44.
    发明专利
    ARTIFICIAL LEATHER AND A METHOD OF MANUFACTURING THE SAME 未知

    公开(公告)号：CA961401A

    公开(公告)日：1975-01-21

    申请号：CA87240

    申请日：1970-07-03

    Applicant: TORAY INDUSTRIES

    Inventor： OKAMOTO MIYOSHI ,  MIZUGUCHI SHUNJI ,  WATANABE KOJI

    IPC: D04H1/64 ,  D06N3/00

    Abstract: 1329710 Leather substitutes TORAY INDUSTRIES Inc 30 June 1970 [9 July 1969 (2)] 31511/70 Heading B5N [Also in Division B2] A leather substitute is produced by (a) forming a fibrous felt from numerous islands-in-a-sea type composite filaments in three dimensionally interlaced disposition, e.g. by needle punching, the island components of the composite filaments having a thickness of 0À001-0À5 denier, (b) impregnating it with a water-soluble high-polymeric substance, e.g. polyvinyl alcohol, carboxymethyl cellulose, methyl cellulose or starch, (c) removing the sea component from the fibres by treatment with a solvent for the sea component which is not a solvent for the islands component and does not dissolve the water-soluble high polymeric substance, (d) impregnating the filamentary mass with an elastic high polymeric substance and solidifying it, (e) removing the water-soluble high polymeric substance from the filamentary mass on or after the solidification and before or after the formation of a microporous layer of 0À02-5 mm. thickness on one surface of the fibrous sheet obtained, and raising the other surface of the sheet, e.g. by buffing. The islands-in-a-sea type composite filament comprises at least two different synthetic high polymeric components, the island components being placed in such positions in the cross-section of the filament that they are isolated from each other by the sea component and are elongated to an appreciable extent along the filament so that when the sea component is removed bundles of, preferably 3- 5000, extremely fine synthetic fibres of 0À001- 0À5 denier fineness are produced. The island component may be a polyester, polyamide, polyolefin, polyacrylonitrile or polyurethane, and the sea component may be polystyrene containing polyethylene glycol or a copolymer of styrene or ethylene with acrylonitrile. In producing the fibrous felt in step (a) the fibres may be formed into a web and two or more webs which may be different needle punched together, the resulting felt optionally being subjected to shrinking. The elastic high polymeric substance used in step (d) may be a polyurethane, natural rubber, a copolymer of butadiene with styrene or acrylonitrile or of acrylonitrile with styrene, or neoprene. The microporous layer of polyurethane which may contain carbon black may be applied to the filamentary layer which may be treated with an adhesive, or applied to a film, release paper, embossed roller or cloth, which is pressed against the filamentary layer to transfer the polyurethane layer thereto and then removed. The polyurethane layer may be subjected to grinding to provide a suede touch. The filamentary layer may be sliced in a direction substantially parallel to the surface thereof at a stage from the time the felt is impregnated with the water-soluble high polymeric substance to a stage at which both surfaces thereof are covered with polyurethane layers.

    A PILE SHEET MATERIAL AND A PROCESS OF MANUFACTURING THE SAME
    47.
    发明专利
    A PILE SHEET MATERIAL AND A PROCESS OF MANUFACTURING THE SAME 未知

    公开(公告)号：GB1300268A

    公开(公告)日：1972-12-20

    申请号：GB2692770

    申请日：1970-06-04

    Applicant: TORAY INDUSTRIES

    Inventor： HIKOTA TOYOHIKO ,  OKAMOTO MIYOSHI ,  TOKI MASAMICHI

    IPC: D03D27/00 ,  D04H11/00 ,  D04H11/08

    Abstract: 1300268 Pile fabrics; yarns TORAY INDUSTRIES INC 4 June 1970 26927/70 Headings D1K and D1W A pile fabric with pile yarns of very fine fibres 2 is made by encasing at least five of the fibres in a composition different to that of the fibre material to form a composite fibre and removing the encasing material after the fibres have been made into the fabric. The composite fibres may be severed into staple fibres and spun into a yarn. The yarn may be incorporated as the pile yarn in a warp or weft pile fabric, woven into a fabric which is subsequently napped, used as the pile in an electrostatic flocking process or made into a non-woven needle-piled felt. The non-woven felt may be a laminate of two different pile materials with the pile of each surface having different characteristics. Various materials of natural and synthetic origin for the fibre and encapsulation substances are described and a formula is given for the length to thickness ratio and bending torque of the composite fibre.

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