A method of manufacturing a latent crimp composite fiber, and fiber assembly, as well as non-woven fabric

摘要

Making use of with the 1st component which includes the ethylene - olefin copolymer which was polymerized making use of the metallocene catalyst and the 2nd component which consists of the thermoplastic polymer which possesses the fusion point T_{2 which} is higher than fusion point T of the 1st component₁, the 1st component it exposes at length of 20% or more vis-a-vis lap the length of the surface of the fiber, the single fiber hot-air where the temperature 100C, time 15 minutes, the single fiber hot-air coefficient of contraction which initial tension 0.018mN/dtex (2mg/d) with is measured becomes 50% or more at the same time JIS-L-1015 (hot-air coefficient of contraction) according to, under the same conditions initial tension is measured 0.450mN/dtex (50mg/dtex)The latent reduction characteristic compound kind of fiber where coefficient of contraction becomes 15% or more is formed. This latent reduction characteristic compound fiber reveals the reduction at low temperature, at the same time possesses thermal adhesiveness.