POLYVINYL ALCOHOL FIBER HAVING WATER RESISTANCE AND THERMOCOMPRESSION BONDING CHARACTER

Japanese Patent JP3254315

B2

PURPOSE: To obtain a polyvinyl alcohol fiber having a water resistance, thermocompression bonding character and a high strength, especially having the ordinary handleability of a fiber in a common use and having little dimensional change in a thermocompression-bonding treatment to enable thermocompression bonding.
CONSTITUTION: This fiber is obtained by blending a polyvinyl alcohol polymer having high melting point and a water-resistant polymer having a low melting point in a specific range of the ratio and subjecting to low-temperature blended spinning in such a manner that the fiber is solidified evenly in the direction of the cross section. This is a strong fiber and has a sea-island configuration composed of a sea component consisting of a polyvinyl alcohol polymer having a high melting point and an island component consisting of a water resistant polymer having a low melting point, wherein the plenty number of island components preferably distribute within 1 p depth from the outermost surface of the fiber. Further, this fiber has the characteristic fiber function of the high-melting polyvinyl alcohol of the matrix phase in a common use but when pressure is applied at a high temperature during thermocompression bonding treatment the low melting polymer of the island component is extruded on the fiber surface to enable the thermocompression bonding of fibers with each other.

Akio Ohmori
Tomoyuki Sano
Masahiro Sato
Shunpei Naramura
Satoru Kobayashi
Yousuke Sekiya

JP26502293A

February 04, 2002

October 22, 1993

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KURARAY CO.,LTD.

C08L29/04; D01D5/34; D01F6/14; D01F6/50; D01F8/10; D02J1/22; D04H1/541; D21H13/16; (IPC1-7): D01F6/50; D04H1/54; D21H13/16

JP53106804A
JP3104922A
JP1260017A
JP3513158B1

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