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Title:
METHOD FOR RECOVERING PULP FIBER FROM USED HYGIENE PRODUCT
Document Type and Number:
WIPO Patent Application WO/2017/110234
Kind Code:
A1
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.

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Inventors:
KONISHI TAKAYOSHI (JP)
HIRAOKA TOSHIO (JP)
KAMEDA NORITOMO (JP)
ICHIURA HIDEAKI (JP)
Application Number:
PCT/JP2016/081491
Publication Date:
June 29, 2017
Filing Date:
October 24, 2016
Export Citation:
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Assignee:
UNICHARM CORP (JP)
International Classes:
B09B3/00; A61F13/15; A61F13/84; A61L2/04; A61L2/18; A61L11/00; C08J11/16; D21C5/02; A61L101/06; A61L101/10
Foreign References:
JPH04317785A1992-11-09
JP2002292304A2002-10-08
JP2001047023A2001-02-20
JPS46S4210Y1
US20110268606A12011-11-03
JP2014217835A2014-11-20
Other References:
See also references of EP 3378576A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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