Title:
HYGROSCOPIC POLYESTER FIBER AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3727419
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject fiber having a three layer structure comprising a core layer produced from a specific resin, a sheath layer produced form a specific resin and an intermediate layer interposed between the core layer and the sheath layer, not causing the breakage of the sheath layer due to a weight- reducing processing using an alkali, excellent in spinnability and light resistance and suitable for inner clothes, etc.
SOLUTION: This hygroscopic polyester fiber has a three layer structure comprising (A) a core layer comprising a hydroscopic thermoplastic resin 3 such as a polyalkylene terephthalate containing 10-50wt.% of a polyalkylene glycol having an average mol.wt. of 2000-20000, (B) a sheath layer comprising an easily alkali-soluble resin 1 such as a copolymerized polyalkylene terephthalate copolymerized with ≥2.5mol% of 5-sodium sulfoisophthalic acid, and (C) an intermediate layer disposed between the core layer and the sheath layer, comprising a polyester resin 2 more insoluble in an alkali than the sheath layer and containing 0.05-5wt.% of particles which comprise cerium oxide, talc, etc., and whose surfaces are coated with amorphous silica. The hydroscopic polyester fiber is preferably subjected to a weight-reducing treatment using an alkali to elute the sheath layer.
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Inventors:
Atsuko Ueda
Tomoyuki Izumi
Tomoyuki Izumi
Application Number:
JP21528996A
Publication Date:
December 14, 2005
Filing Date:
July 25, 1996
Export Citation:
Assignee:
Nippon Esther Co., Ltd.
International Classes:
D06M11/00; D01F1/10; D01F8/14; D06M11/38; D06M101/00; D06M101/16; D06M101/30; D06M101/32; (IPC1-7): D01F8/14; D06M11/38
Domestic Patent References:
| JP4153366A | ||||
| JP4214412A | ||||
| JP7278964A |