Title:
METHOD FOR RECYCLING MULTIPLE MATERIALS, INCLUDING SUPERABSORBENT POLYMER AND PULP FIBERS, FROM USED ABSORBENT ARTICLES
Document Type and Number:
WIPO Patent Application WO/2023/120465
Kind Code:
A1
Abstract:
Provided is a method for recycling materials of used absorbent articles that can reduce the wastewater treatment load of process liquid and reduce the sanitation load in equipment maintenance. This method is for recycling multiple materials, including a superabsorbent polymer and pulp fibers, from used absorbent articles that are soiled and have absorbed moisture. This method comprises a pretreatment step (S01) for removing dirt and moisture from the used absorbent article in an inactivating aqueous solution that inactivates the superabsorbent polymer and discharging the inactivating aqueous solution containing the dirt and moisture, and a main treatment step (S02) for pouring water into the used absorbent article from which the dirt and moisture have been removed, and separating and recovering at least one of the multiple materials from the used absorbent article.
Inventors:
KONISHI TAKAYOSHI (JP)
KURITA NORITOMO (JP)
KURITA NORITOMO (JP)
Application Number:
PCT/JP2022/046638
Publication Date:
June 29, 2023
Filing Date:
December 19, 2022
Export Citation:
Assignee:
UNICHARM CORP (JP)
International Classes:
B09B3/70; B09B3/35; D21C5/02
Foreign References:
| JP2016000881A | 2016-01-07 | |||
| JP2003019169A | 2003-01-21 | |||
| JP2012081433A | 2012-04-26 | |||
| JP2010084031A | 2010-04-15 | |||
| JP2020099839A | 2020-07-02 | |||
| JP2019085686A | 2019-06-06 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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