Title:
METHOD FOR PRODUCING PLASTIC MATERIAL DERIVED FROM USED SANITARY PRODUCT SUITABLE FOR MATERIAL RECYCLING OR CHEMICAL RECYCLING, AND PLASTIC MATERIAL DERIVED FROM USED SANITARY PRODUCT
Document Type and Number:
WIPO Patent Application WO/2023/210528
Kind Code:
A1
Abstract:
Provided is a method for producing a plastic material derived from a used sanitary product suitable for material recycling or chemical recycling, wherein impurities in the produced plastic material can be suppressed. The method comprises: a first separation step S2 for separating a used sanitary product including excreta, a plastic material, a superabsorbent polymer, and pulp fibers into a first fraction containing the plastic material and a second fraction containing the excreta, the superabsorbent polymer, which has been deactivated, and the pulp fibers; a second separation step S3 for applying a physical impact to separate the first fraction into the plastic material and excreta, a superabsorbent polymer, and a pulp fibers remaining in the first fraction due to not being separated in the first separation step; and an aqueous solution treatment step for spraying an aqueous solution onto the separated plastic material.
Inventors:
KONISHI TAKAYOSHI (JP)
ISHIKAWA YOSHIHIDE (JP)
MATUMOTO YOSHIHIKO (JP)
ISHIKAWA YOSHIHIDE (JP)
MATUMOTO YOSHIHIKO (JP)
Application Number:
PCT/JP2023/015928
Publication Date:
November 02, 2023
Filing Date:
April 21, 2023
Export Citation:
Assignee:
UNICHARM CORP (JP)
International Classes:
B29B17/02; B09B3/30; B09B3/70; B09B101/67
Domestic Patent References:
| WO2022085359A1 | 2022-04-28 |
Foreign References:
| JPH06269746A | 1994-09-27 | |||
| JP2009183893A | 2009-08-20 | |||
| JP2000084533A | 2000-03-28 | |||
| JP2001310178A | 2001-11-06 | |||
| JP2018024964A | 2018-02-15 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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