Core/sheath type temperature-sensitive shape-transformable composite filaments
AssigneeThe Pilot Ink Co., Ltd.
InventorNaoya Ishimura
Life of this patent
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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.degree. C. to 70.degree. C., the composite filament is constituted in proportions satisfying the following expressions (1), (2) and (3). In the core; (A)/(B)=5/95 to 90/10 (% by weight) (1) In the sheath; (A)/(B)=100/0 to 50/50 (% by weight) (2) Core/sheath=10/90 to 95/5 (% by weight) (3) 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.
Claims13
A core/sheath 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.degree.C. to 70.degree.C.;
- said composite filament being constituted in proportions satisfying the following expressions (1), (2) and (3), and, upon application of an external stress in a temperature region not lower than a temperature about the glass transition temperature of the thermoplastic polymer (B) and lower than its melting point, being transformable to any shapes that conform to that stress, and being capable of becoming fixed to the transformed shape in a temperature region lower than the glass transition temperature
- In the core;
- (A)/(B)=5/95 to 90/10 (% by weight) (1)
- In the sheath;
- (A)/(B)=100/0 to 50/50 (% by weight) (2)
- Core/sheath=10/90 to 95/5 (% by weight) (3).
Dependencies are inferred from the claim text.