Porous acrylic synthetic fibers comprising cellulose acetate in an acrylic matrix,申请号US19800156993-传众专利搜索

Porous acrylic synthetic fibers comprising cellulose acetate in an acrylic matrix

申请公布号：US4351879(A)

申请号：US19800156993

申请日期：1980.06.06

申请公布日期：1982.09.28

申请人：

KANEBO, LTD.

发明人：KONDO, YOSHIKAZU;YAMAMOTO, TOSHIHIRO;YAMAMOTO, TAKAJI

分类号：D01D5/247;D01F8/02;D01F8/08;(IPC1-7):B32B27/02;D01F8/10;D02G3/00

主分类号：D01D5/247

摘要：Porous acrylic synthetic fibers having water absorption property and having substantially no microvoids but having mainly macrovoids are produced by spinning an organic solvent solution containing 15 DIFFERENCE 35% by weight of a polymer consisting of 2 DIFFERENCE 30 parts by weight of cellulose acetate and 70 DIFFERENCE 98 parts by weight of an acrylic polymer into a coagulation bath at a temperature of no higher than 30 DEG C., primarily drawing the spun fibers at a draw ratio of 2.5 DIFFERENCE 8.0 times to form water swelled fibers wherein macrovoids are distributed, drying the water swelled fibers at a temperature of 100 DIFFERENCE 180 DEG C. to a water content of no greater than 1.0% by weight and secondarily drawing the dried fibers under wet heat to elongate the macrovoid structure. This invention includes acrylic composite fibers having the water absorption property, wherein at least one of components A and B consisting of 2 DIFFERENCE 50% by weight of cellulose acetate and 50 DIFFERENCE 98% by weight of an acrylic polymer and another component B consisting of an acrylic polymer are bonded in a conjugate ratio of 2/8 DIFFERENCE 8/2 (by weight) along the fiber axial direction, one component A having substantially no microvoids but having mainly macrovoids, and a method for producing said acrylic composite fibers.