Crimped conjugated fiber and non-woven fabric comprising the fiber

摘要

It is an object of the present invention to obtain crimped conjugated fibers having excellent crimp properties. The present invention provides a crimped conjugated fiber having a crimpable cross-sectional configuration, wherein a cross section of the fiber includes at least two portions: a portion (a) and a portion (b); the portion (a) includes an olefin polymer (A) and the portion (b) includes an olefin polymer (B); the olefin polymer (A) differs from the olefin polymer (B) in at least any one of Mz/Mw, melting point and MFR; and a specific fatty acid amide is added to the olefin polymer (A) and/or the olefin polymer (B). The present invention also provides a non-woven fabric including said crimped conjugated fiber.

主权项

1. A crimped conjugated fiber having a crimpable cross-sectional configuration, wherein a cross section of the fiber comprises at least two portions: a portion (a) and a portion (b); the mass ratio of the portion (a) to the portion (b) [(a):(b)] is in the range of 10:90 to 60:40; the portion (a) comprises an olefin polymer (A) and the portion (b) comprises an olefin polymer (B); the olefin polymer (A) differs from the olefin polymer (B) in at least any one of Mz/Mw (a ratio of Z-average molecular weight (Mz) to weight average molecular weight (Mw)), melting point and MFR (melt flow rate); and a fatty acid amide having 19 or less carbon atoms is added to the olefin polymer (A) and/or the olefin polymer (B);
wherein the difference between the melting points of the olefin polymer (A) and the olefin polymer (B) is less than 20° C., and the blended amount of the fatty acid amide having 19 or less carbon atoms is in the range of 0.1 to 10 parts by weight based on 100 parts by weight of the olefin polymer (A) and/or the olefin polymer (B).