To obtain a splitting conjugate fiber capable of easily and stably obtaining a superfine fiber by treating with a weak alkali, excellent in DMF resistance and suitable for artificial leathers, etc., by drawing a splitting conjugate fiber containing a specific alkali soluble polymer as one component and heat treating the fiber.
This splitting conjugate fiber is obtained by drawing a splitting conjugate fiber as one component comprising a weal alkali soluble polymer, which consists of a copolyester comprising terephthalic acid and ethylene glycol as main constituent ingredients and containing preferably 6-12mol% (based on the total acid component) of 5-sodium sulfoisophthalic acid and preferably 0-10mol% of isophthalic acid, then heat treating the drawn fiber with hot water or steam. It is preferable to split the splitting conjugate fiber into ≥2 threads by treating the fiber with a weak alkali and bring the denier of the fiber after splitting to ≤1 denier.
| JPH03161515 | CONJUGATE FIBER OF MULTILAYERED STRUCTURE |
| WO/1997/045575 | ELASTIC FIBRE |
WATANABE KOJI
IIJIMA HIROMICHI
