Title:
How to recover pulp fiber from used hygiene products
Document Type and Number:
Japanese Patent JP6316796
Kind Code:
B2
Abstract:
Provided is a method for efficiently recovering pulp fiber from used hygiene products that include pulp fiber and a polymer absorbent. This method is characterized by including a step for introducing the used hygiene product into a treatment tank in which an aqueous solution with ozone dissolved therein has been introduced, and a step for treating the used hygiene product while infusing water into the treatment tank at a first flow rate, extracting the aqueous solution from the treatment tank at a second flow rate and introducing a gas containing ozone into the aqueous solution in the treatment tank, thereby decomposing the polymer absorbent, lowering the molecular weight thereof, and making the same dissolvable.
Inventors:
Takayoshi Konishi
Toshio Hiraoka
Kameda Noriho
Hideaki Ichiura
Toshio Hiraoka
Kameda Noriho
Hideaki Ichiura
Application Number:
JP2015255231A
Publication Date:
April 25, 2018
Filing Date:
December 25, 2015
Export Citation:
Assignee:
UNI-CHARM CO.,LTD.
International Classes:
B09B3/00; A61F13/472; A61F13/49; A61L2/18; A61L11/00; D21B1/16; D21C5/02
Domestic Patent References:
| JP4317785A | ||||
| JP2002292304A | ||||
| JP2001047023A | ||||
| JP464210Y1 | ||||
| JP6269746A |
Foreign References:
| US20110268606 |
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