Title:
SANITATION PRODUCT INCLUDING RECYCLED PULP
Document Type and Number:
Japanese Patent JP2018165423
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a recycled pulp having a reduced ash content and capable of being reusable as a sanitary product from a used sanitary product including pulp fiber and a super absorbent polymer.SOLUTION: Provided is a method for producing a recycled pulp, including: a calcium treatment step of treating a used sanitary product with a water-soluble calcium compound to dewater a super absorbent polymer in the used sanitary product; a decomposing step of decomposing the used sanitary product into pulp fiber and the other material by acting physical force on the used sanitary product; a separation step of separating the pulp fiber from a mixture of the pulp fiber and the other material produced in the decomposing step; a disinfection step with a disinfectant; and a citric acid treatment step of treating the separated pulp fiber with a citric acid aqueous solution in a state where its pH lies in an acidic state.SELECTED DRAWING: None
Inventors:
YAMAGUCHI MASASHI
KONISHI TAKAYOSHI
KONISHI TAKAYOSHI
Application Number:
JP2018135235A
Publication Date:
October 25, 2018
Filing Date:
July 18, 2018
Export Citation:
Assignee:
UNI CHARM CORP
International Classes:
D21C5/02; A61L2/18; A61L11/00; B09B3/00; C08J11/26
Domestic Patent References:
JP2003225645A | 2003-08-12 | |||
JPS58127714A | 1983-07-29 | |||
JP2010059586A | 2010-03-18 | |||
JP2011038197A | 2011-02-24 | |||
JP2009183893A | 2009-08-20 | |||
JP2013132600A | 2013-07-08 | |||
JP2002273731A | 2002-09-25 | |||
JP2013108963A | 2013-06-06 | |||
JP2004115975A | 2004-04-15 |
Attorney, Agent or Firm:
Atsushi Aoki
Shinji Mitsuhashi
Hiroyuki Onoda
Okuno Takenori
Kenji Fujimoto
Miki Ueno
Shinji Mitsuhashi
Hiroyuki Onoda
Okuno Takenori
Kenji Fujimoto
Miki Ueno