CELLULOSE FIBERS, CELLULOSE FIBER-CONTAINING MATERIAL, MOLDED BODY, AND METHOD FOR PRODUCING CELLULOSE FIBERS
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United States of America
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Issued Date -
Mar 31, 2022
app pub date -
Dec 25, 2019
filing date -
Dec 25, 2019
priority date (Note) -
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Abstract
The present invention is intended to enhance the transparency of a composition obtained using ultrafine cellulose fibers having phosphorous acid groups, while suppressing the yellowing of the ultrafine cellulose fibers. The present invention relates to cellulose fibers having a fiber width of 1000 nm or less and having a phosphorus oxoacid group or a phosphorus oxoacid group-derived substituent, wherein when a first amount of dissociated acid in the cellulose fibers is set to be A1 and a total amount of dissociated acid in the cellulose fibers is set to be 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 a predetermined condition, the YI value of the sheet is 6.0 or less.
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