Abstract
The oxygen low-temperature plasma (LTP) treatment on knitted woolen fabric was carried out to investigate the changes of shrinkage resistance, bursting strength and moisture absorption of knitted woolen fabric after treatment. In addition, the effects of different levels of exposure time, treatment power and gas flow rate on the change of felting rate, bursting strength and moisture absorption of knitted woolen fabric in the process of LTP were investigated. The results show that LTP treatment can improve the anti-felt, bursting strength, moisture absorption of knitted woolen fabric. According to the analysis of variance, in the process of LTP treatment, the exposure time is the primary factor that affects the degree of change in the hygroscopicity of knitted woolen fabric, and treatment power is the main factor that affects the degree of change in the shrinkage resistance of knitted woolen fabric. Finally, under the experimental conditions, the best treatment process of knitted woolen fabric by oxygen low-temperature plasma is 20 min, 150 sccm and 400 w.
Highlights
Wool fiber is classified among protein fibers
The scale layer on the surface of wool fiber is rich in covalently bonded lipid substances, resulting in poor initial wettability of the fabric to liquid water, and the directional frictional effect of the scale layer will cause felting of knitted woolen fabric, making it thicker and stiffer
After the pressure is stable, adjust the exposure time, treatment power and gas flow rate of the plasma processor, and carry out the plasma treatment test on the knitted woolen fabric according to the test plan
Summary
Wool fiber is classified among protein fibers. Wool fiber has excellent strength, elasticity, air permeability, warmth preservation and heat regulation performance, which is commonly used in high-grade knitted fabrics. The scale layer on the surface of wool fiber is rich in covalently bonded lipid substances, resulting in poor initial wettability of the fabric to liquid water, and the directional frictional effect of the scale layer will cause felting of knitted woolen fabric, making it thicker and stiffer. The scale layer on the surface of wool fiber is rich in covalently bonded lipid substances, resulting in poor initial wettability of the fabric to liquid water, and the directional frictional effect of the scale layer will cause felting of knitted woolen fabric, making it thicker and stiffer. The process of low temperature plasma technology does not require water and chemical reagents, nor will it cause environmental pollution It can reduce the felting rate, improve wettability, fiber cohesion by selectively modifying the original characteristics of the wool fiber surface. The L9 [34] orthogonal table was used to conduct a threefactor three-level test to explore the better process of knitted woolen fabrics treated by oxygen low-temperature plasma.
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