SHEET-SHAPED OBJECT AND PROCESS FOR PRODUCING SAID SHEET-SHAPED OBJECT

Title:

SHEET-SHAPED OBJECT AND PROCESS FOR PRODUCING SAID SHEET-SHAPED OBJECT

Document Type and Number:

WIPO Patent Application WO/2014/084253

Kind Code:

A1

Abstract:

The present invention provides a process for producing a sheet-shaped object which has a piled graceful appearance and a soft texture and which has even better wear resistance, the process being characterized in that the following steps (1) to (5) are conducted sucessively. (1) A step in which a polyvinyl alcohol having a degree of saponification of 98% or higher and a degree of polymerization of 800-3,500 is dissolved in water to obtain an aqueous polyvinyl alcohol solution in which the contents of methyl acetate, acetic acid, and methanol are 50 ppm or less each; (2) a step in which the polyvinyl alcohol is imparted to a fibrous base that comprises, as the main constituent component, fibers capable of forming ultrafine fibers, in an amount of 0.1-50 mass% relative to the fibers of the fibrous base; (3) a step in which ultrafine fibers having an average single-fiber diameter of 0.3-7 μm are formed from the fibrous base obtained in the step (2); (4) a step in which a water dispersion type polyurethane is imparted to the fibrous base obtained in the step (3); and (5) a step in which the polyvinyl alcohol is removed from the fibrous base obtained in the step (4).

Inventors:

KOIDE GEN (JP)
NISHIMURA MAKOTO (JP)
TSUCHIMOTO TAKAHIRO (JP)

Application Number:

PCT/JP2013/081891

Publication Date:

June 05, 2014

Filing Date:

November 27, 2013

Export Citation:

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Assignee:

TORAY INDUSTRIES (JP)

International Classes:

D06M15/564; D06M11/00; D06M15/00; D06M15/333; D06N3/14

Foreign References:

JP2009293150A	2009-12-17
JP2010248683A	2010-11-04
JPH0533256A	1993-02-09
JP2002030577A	2002-01-31
JP2013234409A	2013-11-21
JP2002030579A	2002-01-31
JP2003096676A	2003-04-03
JP4644971B2	2011-03-09

Other References: