| abstract |
To provide a cellulose fatty acid mixed ester fiber having good mechanical properties and heat resistance suitable as a fiber, and a method for producing the same. A cellulose fatty acid mixed ester comprising at least 80 to 98% by weight of a cellulose fatty acid mixed ester having an ester substitution degree of 1.5 to 3.0 and an average degree of polymerization of 50 or more and 2 to 20% by weight of a plasticizer. A cellulose fatty acid mixed ester fiber comprising a composition and having a strength of 0.5 to 4.5 cN / dtex and an elongation of 5 to 50%, and a method for producing the same. [Selection figure] None |