BULKY PAPER WITH RUGGED PATTERN AND PROCESS FOR PRODUCING THE SAME

Title:

BULKY PAPER WITH RUGGED PATTERN AND PROCESS FOR PRODUCING THE SAME

Document Type and Number:

WIPO Patent Application WO/2009/145043

Kind Code:

A1

Abstract:

A process for bulky paper production is provided which comprises: forming a wet-process mixture sheet from a papermaking feedstock obtained by dispersing a fibrous material and heat-expandable particles in water, the wet-process mixture sheet comprising the fibers and the heat-expandable particles evenly dispersed therein; subsequently ejecting moist heated air or water vapor to a given part of the wet-process mixture sheet, the air or vapor having a temperature not lower than the expansion initiation temperature of the heat-expandable particles; and then drying the sheet at a temperature at which the heat-expandable particles do not expand sufficiently, whereby bulky paper having a rugged pattern is produced which is composed of a low-density region where the degree of expansion of the heat-expandable particles is high and a high-density region where the degree of expansion of the heat-expandable particles is low. In the process, the rugged parts of bulky paper can be freely designed.

Inventors:

NOZAKI SATOSHI (JP)
SHIRAI TSUTOMU (JP)

Application Number:

PCT/JP2009/058719

Publication Date:

December 03, 2009

Filing Date:

April 28, 2009

Export Citation:

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Assignee:

UNICHARM CORP (JP)
NOZAKI SATOSHI (JP)
SHIRAI TSUTOMU (JP)

International Classes:

D21H21/56; D21H25/16; D21H27/02

Foreign References:

JP2006028654A	2006-02-02
JP2001098494A	2001-04-10
JPH05339898A	1993-12-21
JPH1088495A	1998-04-07
JP2000034695A	2000-02-02
JPS6059198A	1985-04-05
JP2000034695A	2000-02-02

Other References: