In this experiment,the properties of Lyocell fiber soluble pulp imported from softwood wood were studied,and the effects of cold alkali extraction,cellulase treatment and combined pretreatment on the properties of pulp were investigated.The process of preparing Lyocell grade soluble pulp was optimized.The results showed that the properties of the slurry could be significantly improved by the two-step method of first alkali treatment followed by cellulase treatment.The content of α-cellulose reached 97.1%,the degree of polymerization decreased to 663.2,the ash content was 0.03%,the copper ion was 1.2mg/kg,and the whiteness was 90.2%ISO.
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