| 摘要 |
PROBLEM TO BE SOLVED: To obtain at a low cost in high operability through a hot drawing process the subject composite binder fiber capable of bonding the major fibers of a textile structural material without impairing the textile appearance, by making a specific low-melting copolyester occupy part of the fiber surface. SOLUTION: This heat-sealable composite binder fiber is composed of a low-melting copolyester with a crystal melting point of 100-190 deg.C made up from terephthalic acid and adipic acid in a molar ratio of (90:10) to (60:40) as the major acid component and ethylene glycol and 1,4-butanediol in a molar ratio of (80:20) to (30:70) as the major diol component and a high-melting polymer with a crystal melting point of >=220 deg.C, wherein at least part of the fiber surface is occupied by the low-melting copolyester. It is preferable that short fibers 1-20 denier in fineness and 30-100 mm in length consisting of the composite binder fiber and polyethylene terephthalate short fiber 1-20 denier in fineness and 30-100 mm in length are blended with each other in a weight ratio of (10:90) to (50:50) to produce the other objective nonwoven fabric or solid cotton. |
