Optimizing flax roving scouring using pectin compound enzymes

The traditional chemical scouring of flax roving results in serious damage to fiber and environmental pollution,thus,for improving the quality of flax roving,pectin compound enzymes were produced by solid state fermentation using Aspergillus niger 102-ZL,wheat bran,and rice straw powder as main material.The crude pectin compound enzymes liquid was obtained by extracting and used in flax roving scouring.Taking the residual gum content and the strength of scoured flax roving as index,the five parameters(enzyme concentration,treating temperature,time,EDTA addition and pH) of flax roving scouring were optimized using single factor and orthogonal test.The results showed that the optimal enzyme concentration,treating temperature,time,EDTA addition and pH were 75 U/mL,40 ℃,4 h,6 mmol/L and 5-5.5 respectively.Under the optimal condition,the residual gum content and the strength of scoured flax roving were 15.80% and 975 cN respectively,which could meet the requirements of spinning process.