ACTUALIZED CRIMPED COMPOSITE SHORT FIBER AND PROCESS FOR PRODUCTION THEREOF, FIBER ASSEMBLY, AND SANITARY ARTICLE

摘要

A composite short fiber comprising a first component and a second component, wherein the first component (1) comprises a linear polyethylene having a density of 0.90-0.94 g/cm3 and a low-density polyethylene, the second component (2) contains 50 mass% or more of a polyester having a melting point that is higher by 40°C or more than the melting point of the linear polyethylene that constitutes the first component, the first component (1) makes up at least 20% of the surface of the fiber in the cross section of the fiber, and the two components are arranged in such a manner that the position of the gravity center of the second component (2) is deviated from the position of the gravity center of the fiber. In this manner, an actualized crimped composite short fiber having at least one crimping form selected from a wavy crimping form and a spiral crimping form can be produced.