Title:
METHOD FOR PRODUCING RECYCLED FIBERS, AND RECYCLED FIBERS
Document Type and Number:
WIPO Patent Application WO/2019/003657
Kind Code:
A1
Abstract:
In this method for producing recycled fibers by removing superabsorbent polymers from fibers containing superabsorbent polymers, recycled fibers are efficiently produced while the superabsorbent polymers are suitably removed from the fibers. This method produces recycled fibers from a mixture of fibers and superabsorbent polymers. This method involves a continuous treatment step (S36) in which, in a treatment tank (31) having a treatment solution that can dissolve superabsorbent polymers, superabsorbent polymers are dissolved while a mixed solution (51) that contains water and fibers containing superabsorbent polymers is continuously supplied at a first flow rate, and the treatment solution (52) containing the removed fibers is continuously discharged to outside of the treatment tank at a second flow rate.
Inventors:
KONISHI TAKAYOSHI (JP)
HIRAOKA TOSHIO (JP)
KURITA NORITOMO (JP)
HIRAOKA TOSHIO (JP)
KURITA NORITOMO (JP)
Application Number:
PCT/JP2018/018180
Publication Date:
January 03, 2019
Filing Date:
May 10, 2018
Export Citation:
Assignee:
UNICHARM CORP (JP)
International Classes:
D21C5/02; B09B3/00; B09B5/00; C08J11/10; D21B1/32; D21H11/14
Domestic Patent References:
| WO1992007995A1 | 1992-05-14 |
Foreign References:
| JP2009183893A | 2009-08-20 | |||
| JPH06269746A | 1994-09-27 | |||
| JP2009113038A | 2009-05-28 | |||
| JP2003135521A | 2003-05-13 | |||
| JP2016000881A | 2016-01-07 |
Other References:
See also references of EP 3626883A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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