| abstract |
A spontaneously degradable fiber excellent in bulkiness,nsoftness, stretchability and feeling, which comprises (A) a low heat-shrinkablenfiber component comprising a high crystalline aliphaticnpolyester and (B) a high heat-shrinkable fiber component comprising annaliphatic polyester, e.g., a low crystalline or non-crystalline aliphaticnpolyester, and a block copolymer or a mixture the main component ofnwhich is an aliphatic polyester and which comprises a high-meltingncomponent and a low-melting component. Further, fibers excellent innself-crimpability or self-adhesion property and dividable fibers arenobtained by suitably combining the fiber components (A) and (B) to formnconjugated fibers or composite yarns. |