BASE FOR SYNTHETIC LEATHER AND SYNTHETIC LEATHERS MADE BY USING THE SAME

Title:

BASE FOR SYNTHETIC LEATHER AND SYNTHETIC LEATHERS MADE BY USING THE SAME

Document Type and Number:

WIPO Patent Application WO/2007/069628

Kind Code:

A1

Abstract:

A base for synthetic leather comprising a nonwoven fabric structure made of ultrafine-denier fiber bundles and a polymeric elastomer contained therein, which satisfies all of the following four requirements: (1) the ultrafine-denier fiber bundles are each composed of on average 6 to 150 gathered ultrafine-denier filaments, (2) the sectional areas of the ultrafine-denier filaments constituting the bundles are 27μm2 or below and at least 80% of the ultrafine-denier filaments have sectional areas of 0.9 to 25μm2, (3) the average sectional area of the ultrafine-denier fiber bundles falls within the range of 15 to 150μm2, and (4) in an arbitrary cross section of the nonwoven fabric structure parallel to the thicknesswise direction thereof, on average 1000 to 3000 cross sections of ultrafine-denier fiber bundles are present per square millimeter. Plush-tone synthetic leathers or silver-clad-tone ones made by using the base are excellent in the characteristics that conventional leathers could not attain.

Inventors:

FUJISAWA MICHINORI (JP)
TANAKA JIRO (JP)
YAMASAKI TSUYOSHI (JP)
MAKIYAMA NORIO (JP)
ANDO YOSHIYUKI (JP)

Application Number:

PCT/JP2006/324812

Publication Date:

June 21, 2007

Filing Date:

December 13, 2006

Export Citation:

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Assignee:

KURARAY CO (JP)
FUJISAWA MICHINORI (JP)
TANAKA JIRO (JP)
YAMASAKI TSUYOSHI (JP)
MAKIYAMA NORIO (JP)
ANDO YOSHIYUKI (JP)

International Classes:

D06N3/00; D04H3/007; D04H3/009; D04H3/105; D06M11/00; D06M15/568; D06M23/00

Foreign References:

JP2003328276A	2003-11-19
JP2002275748A	2002-09-25
JP2000110060A	2000-04-18
JPH11200219A	1999-07-27
JPS5334903A	1978-03-31
JPH07173778A	1995-07-11
JPS57154468A	1982-09-24
JP2000273769A	2000-10-03
JPH11200219A	1999-07-27

Other References: