Flat-shaped articles of vinyl polymers and process of producing same

Abstract

Abstract MICROPOROUS, AIR- AND WATER VAPOR-PERMEABLE, WATERABSORBING SHEETS, FILM, FOILS, OR THE LIKE FLAT-SHAPED ARTICLES OF VINYL POLYMERS, PREFERABLY OF HOMOPOLYMERS AND COPOLYMERS OF VINYLCHLORIDE, ARE PRODUCED BY INCORPORATING INTO THE PLASTICIZED VINYL POLYMER COMPOUND AN AQUEOUS SOLUTION OF A WATER SOLUBLE VINYL OR THE LIKE POLYMER, SUBJECTING THE MIXTURE TO THE ACTION OF SHEARING FORCES, APPLYING THE RESULTING PLASTIC MIXTURE TO A FIBROUS WEB SERVING AS SUPPORT, REMOVING THE WATER FROM THE COATING OR IMPREGNATION UNDER CONDITIONS WHEREBY NO BUBBLES ARE FORMED, GELLING THE VINYL POLYMER BY HEATING, REMOVING THE WATER SOLUBLE VINYL OR THE LIKE POLYMER BY WASHING FROM THE COATING OR IMPREGNATION, AND DRYING THE RESULTING FLAT-SHAPED ARTICLE. IF DESIRED, SELF-SUPPORTING FOILS ARE OBTAINED BY STRIPPING THE COATING FORMT HE SUPPORT. THE RESULTING FLAT-SHAPED ARTICLE MAY BE LAMINATED TO VARIOUS KINDS OF FIBROUS WEB BEFORE OR AFTER REMOVING, BY WASHING, THE WATER SOLUBLE COMPONENTS OF THE VINYL POLYMER COMPOUND. THE VINYL POLYMER MAY HAVE ADMIXED THERETO OTHER FILM-FORMING POLYMERS COMPATIBLE THEREWITH, PLASTICIZERS, EXTENDERS, FILLERS, DYESTUFFS, PIGMENTS, LUBRICANTS, ANTIOXIDANTS, STABILIZERS, ANTI-AGING AGENTS, AND, IF DESIRED, VULCANIZATION ACCELERATORS, CROSS-LINKING AGENTS, AND OTHER CONVENTIONALLY USED ADDITIVIES. THE RESULTING MICROPOROUS FOILS HAVING A MICROSCOPICALLY FINE CELLULAR RETICULATE STRUCTURE AND LAMINATES THEREOF WITH FIBROUS WEBS MAY BE GRAINED, STAMPED, EMBOSSED, PRINTED, DYED, LACQUERED, AND/OR SUBJECTED TO OTHER FINISHING PROCESSES. THE FLAT-SHAPED ARTICLES ACCORDING TO THE PRESENT INVENTION ARE USEFUL FOR ALL PURPOSES REQUIRING AIR-AND WATER VAPOR-PERMEABILITY AND/OR WATER-ABSORBING PROPERTIES, FOR INSTANCE, AS ARTIFICAL LEATHER TO BE USED AS UPHOLSTERY MATERIAL, IN THE GARMENT AND SHOE INDUSTRY, AND FOR OTHER PURPOSES.

Inventors

• 👤 Stefan Dorogi

Bibliographic Details