CRIMPED COMPOSITE FIBER, AND NON-WOVEN FABRIC COMPRISING THE FIBER

摘要

A crimped conjugated fiber having a crimpable cross-sectional configuration wherein:
a cross section of the fiber comprises at least a portion (a) comprising a propylene polymer (A) and a portion (b) comprising a propylene polymer (B),
the mass ratio of the portion (a) and the portion (b) [(a): (b)] is in the range of 10:90 to 55:45,
the propylene polymer (A) has Mz/Mw (A) and the propylene polymer (B) has Mz/Mw (B) wherein the difference thereof [Mz/Mw (A) - Mz/Mw (B): ”Mz/Mw] is in the range of 0.30 to 2.2,
the propylene polymer (A) has a melting point [Tm (A)] and the propylene polymer (B) has a melting point [Tm (2)] wherein the absolute value of the difference of the melting points is in the range of 0 to 10°C, and
the ratio of MFR (A) of the propylene polymer (A) to MFR (B) of the propylene polymer (B) is in the range of 0.8 to 1.2. A nonwoven fabric of the present invention comprises the crimped conjugated fiber.