Production method of viscose fiber and hemp fiber blended yarn with flame retardant effect
A technology of viscose fiber and blended yarn, which is applied in the field of spinning, can solve the problem of single effect and achieve the effect of exceptionally good air permeability and thermal conductivity, cool and not close-fitting clothes
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[0013] Embodiments of the present invention: a method for producing a blended yarn of viscose fiber and hemp fiber with a flame-retardant effect, comprising the following steps:
[0014] (1) Preparation of hemp fiber: pre-clean the hemp fiber to remove surface impurities, perform 1 to 10 softening treatments, and dry to obtain softened hemp fiber; the softening treatment includes soaking the hemp fiber in In the pre-cooled softening treatment liquid, the softening treatment liquid contains alkali and urea or thiourea;
[0015] (2) Preparation of flame retardant viscose fiber: First, dissolve 5-10 grams of polyphosphate ester in 10-30 ml of N,N-dimethylformamide, and then add 6-12 grams of urea to prepare flame-retardant finishing solution, immerse 0.2 to 0.4 grams of viscose fiber in the flame retardant finishing solution, react at 130 to 150°C for 1 to 3 hours, and finally wash the viscose fiber to neutrality, and dry it in vacuum at 30 to 50°C for 1 ~12 hours to obtain flam...
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