| abstract |
In a core/sheath type temperature-sensitive shape-transformable composite filament comprising a thermoplastic resin (A) and a thermoplastic polymer (B) having a glass transition temperature within the range of from 0° C. to 70° C., the composite filament is constituted in proportions satisfying the following expressions (1), (2) and (3). n In the core; n n (A)/(B)=5/95 to 90/10 (% by weight) (1) n n In the sheath; n n (A)/(B)=100/0 to 50/50 (% by weight) (2) n n n Core/sheath=10/90 to 95/5 (% by weight) (3) n n The filament is useful as doll hair the hair style of which is thermally shape-transformable to any desired shapes even by infants, and is easily fixable to the transformed shape by cooling. |