PRODUCTION OF VINYL ALCOHOL COPOLYMER HOLLOW YARN MEMBRANE

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...

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Bibliographic Details
Main Authors OKAMOTO TAKEHIKO, SHIGEHISA TAKAHIDE, YASUOKA SHIGEKI
Format Patent
LanguageEnglish
Published 17.12.1996
Edition6
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
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Summary: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 inside of a double-pipe type spinning nozzle wherein a large number of holes are arranged in a circular form in parallel to the flow of the external coagulation soln. flowing to the outsized of the nozzle.
Bibliography:Application Number: JP19950143218