Title:
METHOD FOR MANUFACTURING RECYCLED PULP FIBERS
Document Type and Number:
WIPO Patent Application WO/2019/123580
Kind Code:
A1
Abstract:
The present invention provides a method which, in the process of manufacturing recycled pulp fibers from a mixture of pulp fibers and a high water-absorption polymer, enables efficient manufacturing of the recycled pulp fibers while properly removing the high water-absorption polymer from the pulp fibers. This method comprises: a supply step (S19-2a) for supplying an aqueous solution containing a mixture (98) to a driving fluid supply port (DI) of an ejector (107) and simultaneously supplying, to a suction fluid supply port (AI) of the ejector, a gaseous substance (Z2) which is capable of degrading a high water-absorption polymer so as to make the degraded polymer dissolvable; and a treatment step (S19-2b) for discharging, from a mixed fluid discharge port (CO) of the ejector that is connected to a lower part of a treatment tank (105), a mixed liquid, which is formed when the aqueous solution and the gaseous substance are mixed within the ejector, into a treatment liquid (P2) within the treatment tank, so as to lessen the high water-absorption polymer in the mixture.
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Inventors:
KONISHI TAKAYOSHI (JP)
HIRAOKA TOSHIO (JP)
KATO TAKASHI (JP)
KURITA NORITOMO (JP)
HIRAOKA TOSHIO (JP)
KATO TAKASHI (JP)
KURITA NORITOMO (JP)
Application Number:
PCT/JP2017/045795
Publication Date:
June 27, 2019
Filing Date:
December 20, 2017
Export Citation:
Assignee:
UNICHARM CORP (JP)
International Classes:
D21C5/02; B09B3/00; B09B5/00; C08J11/00
Domestic Patent References:
| WO2017110234A1 | 2017-06-29 |
Foreign References:
| JP2001170665A | 2001-06-26 | |||
| JPH10109026A | 1998-04-28 | |||
| JPH09234479A | 1997-09-09 | |||
| JP2016000881A | 2016-01-07 |
Other References:
See also references of EP 3712323A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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