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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/123766
Kind Code:
The purpose of the present invention is to provide a recycled pulp fiber manufacturing method with which it is possible to easily obtain recycled pulp fibers containing less of a high water-absorption polymer without requiring any mechanical equipment such as an ozone generation apparatus. This method is for manufacturing recycled pulp fibers from used sanitary goods including pulp fibers and a high water-absorption polymer, and is characterized by comprising: an inactivation step (S1) for immersing a sanitary goods constituent material in an acid-containing aqueous solution so as to inactivate the high water-absorption polymer; a high water-absorption polymer degradation step (S3) for generating chlorine dioxide by adding a chlorine dioxide generating material, which is capable of generating chlorine dioxide through reaction with an acid, to the acid-containing aqueous solution that has undergone the inactivation step (S1), and then degrading the inactivated high water-absorption polymer using said chlorine dioxide; and a recycled pulp fiber recovery step (S4) for recovering the recycled pulp fibers from the acid-containing aqueous solution that has undergone the high water-absorption polymer degradation step (S3).

KONISHI, Takayoshi (1531-7 Wadahama, Toyohama-cho, Kanonji-sh, Kagawa 02, 〒7691602, JP)
Application Number:
Publication Date:
June 27, 2019
Filing Date:
October 02, 2018
Export Citation:
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UNICHARM CORPORATION (182 Shimobun, Kinsei-cho Shikokuchuo-sh, Ehime 11, 〒7990111, JP)
International Classes:
D21C5/02; B09B3/00; B09B5/00; B29B17/02; C08J11/16; D21B1/32
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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