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Title:
RECYCLED PULP FIBER MANUFACTURING METHOD, USE OF PERACID FOR INACTIVATING AND DEGRADING HIGH WATER-ABSORPTION POLYMER, AND PERACID-CONTAINING AGENT FOR INACTIVATING AND DEGRADING HIGH WATER-ABSORPTION POLYMER
Document Type and Number:
WIPO Patent Application WO/2019/123765
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a recycled pulp fiber manufacturing method with which it is possible to easily inactivate and degrade a high water-absorption polymer using a single chemical. This method is for manufacturing recycled pulp fibers from used sanitary goods containing pulp fibers and high water-absorption polymer, and is characterized by comprising: a high water-absorption polymer inactivation and degradation step (S1) for immersing a sanitary goods constituent material containing the pulp fibers and an acid radical-containing high water-absorption polymer in a peracid-containing aqueous solution so as to inactivate and degrade the high water-absorption polymer; and a recycled pulp fiber recovery step (S2) for recovering the recycled pulp fibers from the peracid-containing aqueous solution that has undergone the high water-absorption polymer inactivation and degradation step (S1).

Inventors:
KONISHI, Takayoshi (1531-7 Wadahama, Toyohama-cho, Kanonji-sh, Kagawa 02, 〒7691602, JP)
Application Number:
JP2018/036906
Publication Date:
June 27, 2019
Filing Date:
October 02, 2018
Export Citation:
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Assignee:
UNICHARM CORPORATION (182 Shimobun, Kinsei-cho Shikokuchuo-sh, Ehime 11, 〒7990111, JP)
International Classes:
D21C5/02; B09B3/00; B09B5/00; C08J11/16; C08J11/26; D21B1/32; A61F13/53
Attorney, Agent or Firm:
AOKI, Atsushi et al. (SEIWA PATENT & LAW, Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chome, Minato-k, Tokyo 23, 〒1058423, JP)
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