PRODUCTION OF VINYL ALCOHOL COPOLYMER HOLLOW YARN MEMBRANE

• Main Authors: OKAMOTO TAKEHIKO, SHIGEHISA TAKAHIDE, YASUOKA SHIGEKI
• Format: Patent
• Language: English
• Published: 17.12.1996
• Edition: 6
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SPINNING; TEXTILES; TRANSPORTING

PURPOSE: To produce a vinyl alcohol copolymer hollow yarn membrane without generating thickness irregularity. CONSTITUTION: In a method for producing a vinyl alcohol copolymer hollow yarn membrane by a wet method or a dry and wet method, an external coagulation soln. is also allowed to flow to the i...