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Title:
METHOD FOR PRODUCING FIBROUS CELLULOSE AND METHOD FOR PRODUCING FIBROUS CELLULOSE COMPOSITE RESIN
Document Type and Number:
Japanese Patent JP2022070209
Kind Code:
A
Abstract:
To provide: a method for producing fibrous cellulose whose substitution rate of a modification treatment is improved; and a method for producing a fibrous cellulose composite resin.SOLUTION: This method for producing fibrous cellulose comprises: a step for carbamating cellulose fibers; and a step for fibrillating the cellulose fibers into fibrous cellulose. The carbamating step comprises: a mixing step in which the cellulose fibers and at least one agent selected from urea and a urea derivative are mixed with each other; and a heating step in which the cellulose fibers are heated after the mixing step. The mixing step comprises: a step for adding the agent to the cellulose fibers; and a step for mixing up the cellulose fibers and the added agent, the step for mixing up to be carried out such that the precipitation rate of disintegrated cellulose fibers at the interface after 10 minutes standing is less than 60% if a 0.2 mass% disintegration liquid that is prepared by disintegrating the cellulose fibers, which have been obtained by the mixing step, in water is made to have a uniform concentration and subsequently left at rest. In a method for producing a fibrous cellulose composite resin, fibrous cellulose is obtained by the above-described method, and the fibrous cellulose and a resin are mixed with each other.SELECTED DRAWING: None

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Inventors:
IMAI TAKAAKI
MATSUSUE KAZUHIRO
AOKI RYUNOSUKE
Application Number:
JP2021140049A
Publication Date:
May 12, 2022
Filing Date:
August 30, 2021
Export Citation:
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Assignee:
DAIO SEISHI KK
International Classes:
C08B3/20; C08J3/21; C08L1/02; C08L101/00; D06M13/432
Domestic Patent References:
JP2017521513A2017-08-03
JPS57143301A1982-09-04
JP2020163651A2020-10-08
JP2019001876A2019-01-10
JP2020165064A2020-10-08
JP2020094163A2020-06-18
JP2020066828A2020-04-30
JPS5628755A1981-03-20
JPS60210601A1985-10-23
JPS58502217A1983-12-22
JP2003238601A2003-08-27
JP2005525437A2005-08-25
JP2001172302A2001-06-26
Foreign References:
US2134825A1938-11-01
Attorney, Agent or Firm:
Nagai International Patent Office



 
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