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Title:
CRIMPED COMPOSITE FIBER, AND NON-WOVEN FABRIC COMPRISING THE FIBER
Document Type and Number:
WIPO Patent Application WO/2010/050407
Kind Code:
A1
Abstract:
Disclosed is a crimped composite fiber having a crimpable cross-section shape, wherein the transverse cross-section has at least the following two parts (a) and (b): a part (a) composed of a propylene polymer (A); and a part (b) composed of a propylene polymer (B).  In the crimped composite fiber, the ratio of the mass of the part (a) to the mass of the part (b) (i.e., (a):(b)) is 10:90 to 55:45, the difference between the Mz/Mw(A) of the propylene polymer (A) and the Mz/Mw(B) of the propylene polymer (B) (i.e., Mz/Mw(A) – Mz/Mw(B): ΔMz/Mw) is 0.30 to 2.2, the absolute value of the difference between the melting point of the propylene polymer (A) (Tm(A)) and the melting point of the propylene polymer (B) (Tm(B)) is 0 to 10°C, and the ratio of the MFR(A) of the propylene polymer (A) to the MFR(B) of the propylene polymer (B) is 0.8 to 1.2.  Also disclosed is a non-woven fabric comprising the crimped composite fiber.

Inventors:
MORIMOTO, Hisashi (INC. 580-32, Nagaura, Sodegaura-sh, Chiba 65, 〒2990265, JP)
森本 尚史 (〒65 千葉県袖ヶ浦市長浦580-32 三井化学株式会社内 Chiba, 〒2990265, JP)
Application Number:
JP2009/068241
Publication Date:
May 06, 2010
Filing Date:
October 23, 2009
Export Citation:
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Assignee:
MITSUI CHEMICALS, INC. (5-2 Higashi-Shimbashi 1-chome, Minato-ku Tokyo, 17, 〒1057117, JP)
三井化学株式会社 (〒17 東京都港区東新橋一丁目5番2号 Tokyo, 〒1057117, JP)
MORIMOTO, Hisashi (INC. 580-32, Nagaura, Sodegaura-sh, Chiba 65, 〒2990265, JP)
International Classes:
D01F8/06; D04H3/14; D04H3/16
Domestic Patent References:
2002-08-08
Foreign References:
JP2007308868A2007-11-29
JP2002180331A2002-06-26
JPH02191720A1990-07-27
US6454989B12002-09-24
JPH07197367A1995-08-01
Other References:
See also references of EP 2343406A1
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (Gotanda Yamazaki Bldg. 6F, 13-6 Nishigotanda 7-chome, Shinagawa-k, Tokyo 31, 〒1410031, JP)
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