GB727591A - Improvements relating to the treatment of fabrics and articles made therefrom - Google Patents

Abstract

727,591. Shrinking fabrics; compound sheet materials. BRADFORD DYERS' ASSOCIATION, Ltd. May 22, 1952 [May 28, 1951; April 21, 1952], Nos. 12882/52 and 9965/53. Divided out of 727,569. Classes 42 (1) and 140. In a process for making a pre-shrunk multiply fabric or fabric article, the bonding together of the assembly of plies is at least initiated and the assembly is compressively shrunk in a single operation by the combined application of heat and pressure. For the bonding and shrinking, the plies may be passed through a continuous compressive shrinking machine of the type in which a rubber or other belt passes over two rollers and is engaged by a third roller which makes a nip with the first of the two rollers; the third roller is heated to a temperature between 110‹ and 200‹ C., according to the bonding material used, sufficient to bond the plies together during the shrinking operation. A continuous interliner may be fed between two outer plies to such a machine. If the multi-ply assembly requires heat on both sides, it may, on leaving the rubber belt, pass through a pair of rollers, the roller which is on the same side of the assembly as the belt being heated; or potentially adhesive bonding material may be pre-plasticized by plasticizing agents and/or by passing the assembly through a pre-heating zone. When forming a collar or other small article, the article may be passed through a continuous machine or may be treated on a machine such as that described in Specification 541,831, [Group VII]. The multi-ply assembly may comprise outer cotton fabric plies with an adhesive or potentially-adhesive interliner. The interliner may be (a) a fabric impregnated with an adhesive or potentially adhesive material in the form of powder or an aqueous dispersion, e.g. vinyl and acrylic resins or polythene, (b) a film of polythene or unvulcanized rubber, (c) a fabric including cellulose acetate threads which are made adhesive by immersion in a solvent or (d) a fabric made wholly or in part of thermoplastic material in fibre or filament form, e.g. vinyl resins, polythene or polyisobutylene. Alternatively, the assembly may consist of two fabric plies, one of which has been coated on its inner face with a dispersion of polyvinyl acetate and dibutyl phthalate in water to which sodium alginate has been added, and then dried ; the two plies are bonded together at 150‹ C. Specification 402,087 also is referred to. Reference has been directed by the Comptroller to Specification 545,770.