Improvements in the production of sheet materials

Abstract

Abstract 656,013. Fabrics composed of agglutinated fibres. BRITISH CELANESE, Ltd. Dec. 3, 1948, No. 31368. [Class 140] A skin is formed on a loose mass of fibrous material comprising a substantial proportion of thermoplastic fibres by exposing it to radiant heat while held under light pressure by metal gauze through which the radiant heat is applied, the exposure being terminated when the fibres at and near the surface of the mass have been rendered adhesive thereby, and before the thermoplastic fibres within the mass become adhesive. Surface combustion heaters at a temperature of from 750‹ to 950‹ C., or electrical radiant heaters, may be used, and the mass may be exposed to them for a number of short periods interrupted by cooling periods. The thermoplastic fibres may be of cellulose acetate, other cellulose esters, e.g. cellulose propionate, or mixed esters, such as cellulose acetate propionate and cellulose acetate butyrate, cellulose ethers such as ethyl and benzyl cellulose, synthetic linear polyamide condensation products, polymeric vinyl halides or vinyl esters of organic acids, or copolymers of such vinyl esters and vinyl halides, polymerized methacrylic acid esters and the like. The treated material may consist wholly of such thermoplastic fibres, or it may contain a proportion, preferably about 20 per cent or less, of non-thermoplastic fibres, e.g. cotton, silk, wool, regenerated cellulose, jute or hemp. Specification 582,006 is referred to.

Inventors

• 👤 Ralph James Mann
• 👤 Jozef Biedawski

Bibliographic Details