SULFONATED PULP FIBERS, DERIVATIVE PULP, SULFONATED FINE CELLULOSE FIBERS, METHOD FOR PRODUCING SULFONATED FINE CELLULOSE FIBERS, AND METHOD FOR PRODUCING SULFONATED PULP FIBERS

Title:

SULFONATED PULP FIBERS, DERIVATIVE PULP, SULFONATED FINE CELLULOSE FIBERS, METHOD FOR PRODUCING SULFONATED FINE CELLULOSE FIBERS, AND METHOD FOR PRODUCING SULFONATED PULP FIBERS

Document Type and Number:

WIPO Patent Application WO/2019/208656

Kind Code:

A1

Abstract:

[Problem] To provide: sulfonated fine cellulose fibers having excellent transparency; sulfonated pulp fibers suitable for these sulfonated fine cellulose fibers; methods for producing these fibers; and a derivative pulp comprising said sulfonated pulp fibers. [Solution] The sulfonated pulp fibers of the present invention are pulp fibers which comprise a plurality of cellulose fibers and in which some of the hydroxyl groups of the cellulose fibers have been replaced with sulfo groups. The pulp fibers have a content of sulfo-group-derived introduced sulfur atoms higher than 0.42 mmol/g while retaining the fibrous shape. The pulp fibers have a water retentivity degree of 150% or higher. Since the sulfonated pulp fibers have a water retentivity not lower than the given value while retaining the fibrous shape, the degree of freedom of handleability can be improved.

Inventors:

HIASA SHOU (JP)
UCHIMURA HIROMI (JP)
YABUTANI TOMOKI (JP)

Application Number:

PCT/JP2019/017492

Publication Date:

October 31, 2019

Filing Date:

April 24, 2019

Export Citation:

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Assignee:

MARUSUMI PAPER CO LTD (JP)
UNIV NAT CORP EHIME UNIV (JP)

International Classes:

C08B5/14; D21H11/20

Foreign References:

US2511229A	1950-06-13
JP2003313201A	2003-11-06
JPS5213585A	1977-02-01
JP2019011411A	2019-01-24
JP2017043677A	2017-03-02
JP2017008472A	2017-01-12
JP2017025240A	2017-02-02
JP2017025468A	2017-02-02

Other References: