Study on fiber splitting process of waste wool nonwovens
In order to realize the reuse of resources,the waste wool-based functional nonwovens were prepared by micron-level and submicron-level two-stage splitting treatment after pretreatment.The effects of solid-liquid ratio,splitting temperature,reduction time and pH value on the stripping degree and stability of fibril structural units of wool nonwovens were investigated.The results showed that the splitting amount of wool structural unit increased with the increase of splitting temperature,reduction time and pH value,and decreased with the increase of solid-liquid ratio.The structural stability of wool nonwovens decreased with the increase of splitting amount.Through experiments,the results showed that the optimum micron-level splitting process parameters were solid-liquid ratio at 1.5∶50,temperature at 50℃,the optimum submicron-level splitting process parameters were temperature at 75℃,reduction time at 2.5 h,and pH value at 10.
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