Title:
PRODUCTION METHOD FOR CARBAMATED CELLULOSE FIBERS, AND PRODUCTION METHOD FOR CARBAMATED FILAMENTS
Document Type and Number:
WIPO Patent Application WO/2021/251216
Kind Code:
A1
Abstract:
[Problem] To provide a production method for carbamated cellulose fibers and a production method for carbamated filaments whereby it is possible to achieve sufficient carbamation in a short period of time. [Solution] Provided is a production method for carbamated cellulose fibers, said method being characterized by having a step in which cellulose fibers are subjected to a heat treatment such that the hydroxy groups in the cellulose fibers are substituted with carbamate groups at a substitution rate of at least 1.0 mmol/g, wherein the heat treatment is carried out a 150-170°C. Also provided is a production method for carbamated filaments that has a step in which cellulose fibers are fibrillated until the average fiber width is at most 19 µm to produce filaments.
Inventors:
IMAI TAKAAKI (JP)
Application Number:
PCT/JP2021/020861
Publication Date:
December 16, 2021
Filing Date:
June 01, 2021
Export Citation:
Assignee:
DAIO SEISHI KK (JP)
International Classes:
C08B15/06; D01F2/28
Domestic Patent References:
| WO2018230600A1 | 2018-12-20 |
Foreign References:
| US5906926A | 1999-05-25 | |||
| DE19635246A1 | 1997-03-06 |
Attorney, Agent or Firm:
NAGAI INTERNATIONAL PATENT BUREAU (JP)
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