Title:
使用済み吸収性物品からパルプ繊維を回収する方法
Document Type and Number:
Japanese Patent JP6632494
Kind Code:
B2
Abstract:
A method is provided for recovering pulp fibers having little damage from a used absorbent article that contains pulp fibers and a superabsorbent polymer. The used absorbent article is treated at a temperature of greater than or equal to 80°C with an organic acid aqueous solution having a pH no greater than 2.5, and the superabsorbent polymer is deactivated. Preferably, the pulp fibers and the deactivated superabsorbent polymer are separated from the used absorbent article after treatment with the organic acid aqueous solution, and further, a mixture including the separated pulp fibers and deactivated superabsorbent polymer is treated with an oxidizing agent, the deactivated superabsorbent polymer is decomposed, reduced in molecular weight and solubilized.
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Inventors:
Takayoshi Konishi
Toshio Hiraoka
Koichi Yamaki
Kameda Noriho
Toshio Hiraoka
Koichi Yamaki
Kameda Noriho
Application Number:
JP2016154974A
Publication Date:
January 22, 2020
Filing Date:
August 05, 2016
Export Citation:
Assignee:
UNI-CHARM CO.,LTD.
International Classes:
D21C5/02; B09B3/00; B09B5/00; B29B17/02; C08J11/06; C08J11/16
Domestic Patent References:
| JP2016123973A | ||||
| JP2012066156A | ||||
| JP4317785A | ||||
| JP2003039023A | ||||
| JP2014217835A | ||||
| JP2003225645A |
Foreign References:
| WO2015190140A1 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Atsushi Ebiya
Hiroyuki Onoda
Okuno Takenori
Kenji Fujimoto
Takashi Ishida
Tetsuji Koga
Atsushi Ebiya
Hiroyuki Onoda
Okuno Takenori
Kenji Fujimoto