Patent GB-817309-A (GB)
Title: Plastic-coated multiple-ply fabric
IPC: D03D25/00
Filed: 1957-07-01
Abstract: 817,309. Coated multiple - ply fabrics. GENERAL TIRE & RUBBER CO. July 1, 1957 [.July 6, 1956], No. 20720/57. Class 140. A coated multiple-ply fabric sheet suitable for use in shoes or vehicle tops comprises a first layer 1 of cross-woven fabric having a series of spaced connecting threads, a second layer 2 of cross-woven fabric contiguous to the first layer and having a series of spaced connecting threads interwoven with connecting threads of said first layer to prevent separation of said layers, coated with a flexible plastic material 3 bonded to and impregnating only one of said layers so as not to be visible on the uncoated fabric side of the sheet, the other of said layers being devoid of impregnation by said plastic material. The warp threads 4 and 6 and the weft threads 5 and 7 of each layer of cross-woven fabric may be closely spaced and said first layer 1 may have a series of widely and regularly spaced weft threads 5a interwoven with its warp threads 4 and also interwoven at points x with, and may be perpendicular to, a series of widely and regularly spaced warp-threads 6a in the said second layer 2 which are also interwoven with the closely spaced weft threads 7 of the second layer. The fabric may be made of various fibrous materials such as silk, nylon, rayon, Dacron, Perlon, or mixtures thereof. The coating composition may be a suitably plasticised and stabilized high polymeric film-forming material which may be rendered plastic at a temperature between 200‹ and 400‹ F. Specified polymeric compounds are polyurethane, polyethylene, polyvinyl resins such as polymers or copolymers of mono-olefinic materials of general formula where X is a halogen, Y and Z are hydrogen or a halogen, and two or all three X, Y and Z may be similar halogen atoms, e.g. vinyl chloride, fluoride or bromide, vinylene chloride (1,2-dichloro ethylene), vinylidene chloride, vinyl acetals such as vinyl butyral, and acetylene dichloride, and mixtures of these polymeric compounds. Copolymers which may be used may contain a major proportion, at least 80 per cent, of the above-mentioned compounds and a minor proportion of a copolymerizable monoolefinic compound such as chlorovinyl acetate, dimethyl and diethyl maleate, maleic acid or compounds of formula where X<SP>1</SP> is hydrogen, methyl or ethyl, Y<SP>1</SP> is cyanide, carboxyl or esterified carboxyl groups, e.g. vinyl acetate, vinylidene chloride, diethyl maleate, acrylonitrile, methyl acrylonitrile, methyl and ethyl acrylate and methacrylate, and acrylic acid. Suitable copolymers may contain groups such as Some or all of the carboxy groups of the copolymers may be hydrolysed to form hydroxyl groups and may thereafter be condensed with suitable aldehydes to form vinyl acetals. Other materials which may be present are stabilizers, e.g. lead or tin salts, pigments, e.g. titanium dioxide, or carbon black, monomeric and/or polymeric plasticisers, e.g. tricresyl, tributyl and trioctyl phosphate, cresyl diphenyl phosphate, dioctyl adipate, dioctyl, dibutyl, diamyl, or diethoxyethyl phthalate, nitrile rubber, i.e. butadiene-vinyl cyanide copolymer, copolymers of butadiene and methylisopropenyl ketone, polyesters such as polypropylene or polyethylene glycol adipate, polypropylene glycol sebacate and condensation products of polyethylene glycol and a polybasic acid of molecular weight 1000 to 40,000. A prime coat of any material suitable for adhering a polyvinyl halide compound to the fabric, e.g. aqueous emulsion of a mixture of polyvinyl chloride latex and nitrile rubber, may be applied.