Fibrous cellulose, substance containing fibrous cellulose, molded body, and method for producing fibrous cellulose

By employing multiple phosphorus-containing oxygen acidification treatments and controlling the urea decomposition rate, the problems of yellowing and reduced transparency of microfibrillated cellulose were solved, resulting in a highly transparent microfibrillated cellulose composition.

CN113227492BActive Publication Date: 2026-07-21OJI HLDG CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
OJI HLDG CORP
Filing Date
2019-12-25
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In the production of microfibrillated cellulose, the introduction of phosphite groups in existing technologies can easily lead to problems such as yellowing and reduced transparency.

Method used

By performing multiple phosphorus-containing oxygen acidification treatments, the decomposition rate of urea and/or urea derivatives is controlled, yellowing of phosphite groups is inhibited, and the transparency of cellulose is improved.

Benefits of technology

The yellowing of microfibrillated cellulose was successfully suppressed, and the transparency of the composition was improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention aims to suppress yellowing of fine fibrous cellulose having a phosphorous acid group while improving the transparency of a composition obtained using the fine fibrous cellulose. The present invention relates to a fibrous cellulose having a fiber width of 1000 nm or less and having a phosphorous oxyacid group or a substituent derived from a phosphorous oxyacid group, wherein, when the amount of a first dissociation acid in the fibrous cellulose is set as A1 and the total amount of dissociation acids in the fibrous cellulose is set as A2, A1 is 1.35 mmol / g or more and the value of A1 / A2 is 0.51 or more, and when a sheet is formed under predetermined conditions, the YI value of the sheet is 6.0 or less.
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