Abstract:

In order to improve the performance of nonwoven fabric used for medical treatment and hygiene, the optimal degreasing and bleaching process was determined by orthogonal test and range analysis which is studied by NaOH / H2O2 one-step method and studied the effects of the Bleaching-to-Spunlaced and the Spunlaced-to-Bleaching process on water absorption, whiteness, strength, softness and permeability of the spunlaced nonwoven fabric. The results show that the optimum parameters are as follows: time 60min, liquor ratio 1:30, temperature 95 ℃. The effect of temperature on fiber whiteness and water absorption was the most significant, and time had the greatest effect on fiber strength. The thickness, weight and tensile strength of cotton spunlaced nonwoven fabric with the best bleaching parameters decreased, and the water absorption increased significantly. The Bleaching-to-Spunlaced nonwoven fabric prepared with this parameter combination has higher tensile strength and elongation, and the Spunlaced-to-Bleaching nonwoven fabric has better softness, permeability and water absorption.

Key words: pure coton nonwovens materials, medical and hygiene textiles, spunlaced method, degreasing and bleaching, water absorption, whiteness