Title:
METHOD FOR RECOVERING PLASTIC MATERIAL FROM USED NONWOVEN FARIC PRODUCT WHICH CONTAINS USED ABSORENT ARTICLE
Document Type and Number:
WIPO Patent Application WO/2022/085359
Kind Code:
A1
Abstract:
The present invention provides a method for recovering a plastic material from a used nonwoven fabric product, said method being capable of suppressing impurities contained in the recovered plastic material. This method comprises: a primary separation step (S2) wherein a highly water absorbent polymer and pulp fibers are separated from a mixture of a plastic material, the highly water absorbent polymer and the pulp fibers, said mixture being obtained by decomposing a used nonwoven fabric product in an aqueous inactivation solution; and a secondary separation step (S3) wherein the plastic material is recovered by separating the highly water absorbent polymer and the pulp fibers still remaining after the primary separation step from the plastic material by applying a physical impact to the mixture, while spraying an aqueous oxidant solution into the mixture in the air.
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Inventors:
KONISHI TAKAYOSHI (JP)
HIRAOKA TOSHIO (JP)
ISHIKAWA YOSHIHIDE (JP)
KURITA NORITOMO (JP)
HIRAOKA TOSHIO (JP)
ISHIKAWA YOSHIHIDE (JP)
KURITA NORITOMO (JP)
Application Number:
PCT/JP2021/034870
Publication Date:
April 28, 2022
Filing Date:
September 22, 2021
Export Citation:
Assignee:
UNICHARM CORP (JP)
International Classes:
B09B5/00; B29B17/02
Domestic Patent References:
| WO2018100865A1 | 2018-06-07 | |||
| WO2018179617A1 | 2018-10-04 | |||
| WO2016103985A1 | 2016-06-30 |
Foreign References:
| JP2016131956A | 2016-07-25 | |||
| JP2011056490A | 2011-03-24 | |||
| JP2018171589A | 2018-11-08 | |||
| JP2014103864A | 2014-06-09 | |||
| JP2018171589A | 2018-11-08 |
Other References:
See also references of EP 4190459A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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