PRODUCTION OF CONCENTRIC PU/PA TYPE CONJUGATED ELASTIC FIBER

PURPOSE:To provide a method by which an elastic fiber having elastic properties unique to an elastomer in addition to its bulkiness and elastic properties can simply be produced at a low cost by forming the polyurethane elastomer and a polyamide into a specific core-sheath state and carrying out the...

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Bibliographic Details
Main Authors MORISHIGE YOSHIAKI, FUJIMOTO SHOZO, FUJIMURA KAZUO
Format Patent
LanguageEnglish
Published 19.12.1995
Edition6
Subjects
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
NATURAL OR ARTIFICIAL THREADS OR FIBRES
SPINNING
TEXTILES
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Summary:PURPOSE:To provide a method by which an elastic fiber having elastic properties unique to an elastomer in addition to its bulkiness and elastic properties can simply be produced at a low cost by forming the polyurethane elastomer and a polyamide into a specific core-sheath state and carrying out the subsequent stretching, relaxing and heat (wet heat) treatments of the fiber. CONSTITUTION:The characteristic of this method for producing a conjugated elastic fiber comprises treating an undrawn fiber obtained by conjugated melt spinning of a conjugated elastic fiber yarn having a core component of a polyurethane elastomer and a sheath component of a polyamide so as to satisfy conditions of (1) the concentric shape of a cross section of the conjugated fiber, (2) (3/1)-(70/1) relative volume ratio of core/sheath, (3) 70-90% relaxation ratio, and (4) wet heat treatment at 65-95 deg.C treating temperature in continuously carrying out the drawing, relaxing and heat treatments thereof.
Bibliography:Application Number: JP19940150524