Patent GB-549050-A (GB)
Title: Improvements in or relating to laminated fabric
IPC: D06M17/02
Filed: 1941-05-01
Abstract: 549,050. Artificial silk &c. ; compound fabrics. BRITISH CELANESE, Ltd. May 1, 1941, No. 5659. Convention date, May 1, 1940. [Class 2 (ii)] [Also in Group VIII] A fabric containing yarns of an organic thermoplastic material and yarns of a non- thermoplastic material less hydrophobic than the thermoplastic material is rendered suitable for use in the production of laminated fabrics by applying to it, in presence of water, a waterinsoluble plasticizer for the thermoplastic material, and thereafter removing substantially all of the water from the fabric. The water which is present during incorporation of the plasticizer reduces the tendency for the plasticizer to form a greasy deposit on the non- thermoplastic yarns. Preferably, the water contains a penetrating agent so as to reduce the time taken for the absorption of the plasticizer by the thermoplastic yarns. The thermoplastic yarns may be of cellulose acetate, propionate, butyrate or aceto-butyrate, or of ethyl or benzyl cellulose, or of polyhexamethylene adipamide. The hydrophilic yarns may be of cotton, linen, or silk. The fabric may be a woven, knitted, knotted, or netted fabric. The fabric may be wetted with water and then treated with the plasticizer which may be applied by padding, beading, or calender rolls. An aqueous dispersion of the water-insoluble plasticizer may be used, and the fabric may be passed through a bath of the dispersion, which may be heated. Ethyl toluene sulphonamide, monomethyl xylene sulphonamide, dimethyl and diethyl phthalates, di-(methoxy ethyl)- phthalate, triphenyl phosphate, and dibutyl tartrate are specified plasticizers. The plasticizer may be incorporated to the extent of 150 per cent. by weight of the cellulose derivative. Penetrating agents for cellulose acetate specified are Turkey red oil, xylene, toluene, " Monopol" oil (Registered Trade Mark), pine oil, sulphonated pine oil, cyclohexanol, cyclohexanone, diacetin, tetrahydronaphthalene, and a mixture of tetrahydronaphthalene, Turkey red oil, and sodium silicate. Water may be removed from the treated fabric by passing the fabric through a heated chamber. Where white or light-coloured composite fabrics are to be made, a small amount of blue colouring matter may be incorporated in the water or aqueous dispersion of plasticizer to neutralize any yellowing of the fabric. The treated fabric may be used in the production of collars, cuffs, fronts, hats, sweat-bands, peaks for caps, cuffs or gauntlets for gloves, inner linings for cravats, stiffening linings for coats, shoes and parts thereof, head pieces for gas-masks, and for other purposes where fabric of increased stiffness or impermeability is required. The process of lamination may be effected by a wet or dry method. The assembly of fabrics may be wetted with steam and subjected to heat or pressure, or it may be subjected to heat or pressure in the absence of liquids, or in the presence of a liquid or vapour having a solvent or swelling effect. Lamination may be effected by a two stage method in which the superimposed articles are first bound together by a dry method, and the adhesion between the layers is then further increased by a wet method. Specification 502,701, [Group VIII], is referred to.