Patent GB-1192494-A (GB)
Title: Tufted Carpets
Inventor: SANDS SEYMOUR
IPC: D06M15/21
Filed: 1968-05-31
Abstract: 1,192,494. Coated carpets. E.I. DU PONT DE NEMOURS & CO. 31 May, 1968, No. 26338/68. Heading B2E. [Also in Division B5] A tufted carpet having a primary textile backing with non-woven tufts of fibres protruding therefrom is backsized with a composition comprising (a) 10 to 90% by weight of a copolymer of ethylene and vinyl acetate containing from 60 to 85% by weight of units derived from ethylene and from 40 to 15% by weight of units derived from vinyl acetate; (b) 90 to 10% by weight of a wax; and (c) 20 to 80% by weight of a thermoplastic resin other than the ethylene-vinyl acetate copolymer, the percentages being based on the total weight of components (a), (b) and (c). The copolymer of ethylene and vinyl acetate may contain from 0.001 to 3% by weight of units derived from at least one other co-polymerisable monomer e.g. acrylic acid, methacrylic acid, itaconic acid, acrylamide, beta-dimethylaminoethyl methacrylate, beta-hydroxyethylacrylate, diallyl maleate, diallyl phthalate, diallyl ether or ethylene glycol dimethacrylate. The co-poymer of ethylene and vinyl acetate may have an inherent viscosity of 0.45 to 1.50. The wax may have a melting point of from 1.20 to 220‹ Fahrenheit e.g. a Fisher-Tropsch wax, a petroleum wax such as paraffin or microcrystalline, candellilla and carnauba wax. The thermoplastic resin may comprise a polyterpene, rosin or solid rosin derivative e.g. a glycerol or pentaerythritol ester of rosin, hydrogenated rosin, a glycerol or pentaerythritol ester of hydrogenated rosin, a coumarone-indene resin, a permanently fusible phenolic resin, or a petroleum hydrocarbon resin formed from dienes and reactive olefins via the deep cracking of petroleum. The composition may contain a filler e.g. barium sulphate, calcium carbonate, talc, clay or silica which may be present up to 50% by weight of the composition; a stabilizer or anti-oxidant, examples of which are given. The carpet may be backsized with from 10 to 30 ounces of the composition per square yard of carpet. The primary textile backing may comprise a woven jute fabric which may be of weight from 9 to 12 ounces per square yard; a woven cotton fabric which may be of weight from 3.5 to 10 ounces per square yard; a non-woven fabric which may be bonded and which may contain as major fibrous component continuous synthetic organic filaments e.g. polyesters, polyamides, polyhydrocarbons, polyurethanes, polycarbonates and polyacetals, having a loopy configuration disposed within the fabric. The composition, which may have a melting point from 160 to 300‹F., may be sandwiched between the primary textile backing and a secondary backing which may be similar to the primary backing or woven from paper fibre card. The composition is applied in nonaqueous solvent-free molten form followed by cooling to effect solidification. The secondary backing is applied prior to the solidification of the composition, after reactivation of the solidified composition, or after the application of a further coating to the backsize. The tufts may be of nylon, acrylics, wool, cotton or rayon. Reference has been directed by the Comptroller to Specification 964,551.