Improvements in the manufacture of composite materials

摘要

455,328. Compound sheet materials; coated fabrics. BRITISH CELANESE, Ltd., 22, Hanover Square, London. Oct. 31, 1935, No. 30073. Convention date, Nov. 9, 1934. [Class 140] A layer or sheet of a thermoplastic composition is united by heat and pressure to a preheated base which has been impregnated with a dihydric or other polyhydric alcohol or substitution derivative thereof, e.g. glycerine, glycol, diethylene or triethylene glycol, if desired in aqueous solution. The thermoplastic composition may comprise a cellulose ester or ether, halogenated rubber, vinyl resins, &c. and, if desired, plasticizers, dyes, pigments, fillers, resins, mineral oils, natural or oxidized vegetable or animal oils, rubber, &c., and may be a loosely-formed layer pressed from powder, e.g. a powder obtained as described in Specification 428,456, [Group III]. Fabrics made by weaving, netting, knotting, or knitting yarns or filaments of silk, wool, cotton, or regenerated cellulose, cotton duck, felt, paper, or cardboard may be coated. The thermoplastic layer may be formed and applied to the base in a continuous operation, e.g. a powder comprising a cellulose derivative and plasticizer with or without rubber is sheeted between heated rolls, and the hot, semi-fluid sheet further heated and pressed into a heated impregnated fabric base. The still hot coated material may be embossed, e.g. to imitate leather. The impregnant may be removed from the finished material by passing through or spraying with water. The products may be veneered on to wood or iron, or used for covering floors, walls, furniture, counters, or containers.