What problems often occur in the processing of chemical fiber felt

The chemical fiber felt is often subjected to various external forces such as stretching, crimping, and twisting during the processing, so that the fiber changes its original shape. Due to the good elasticity of wool, wool felt tries to return to its original shape, so various stresses are generated inside the fibers. This internal stress needs to be gradually attenuated until eliminated in a long period of time. It is often used for the processing of wool products. This is one of the factors that make wool products unstable in size and shape during processing and use. The plasticity of wool refers to the property that wool can rapidly attenuate its internal stress under humid and hot conditions, and can change its existing shape according to external force, and then keep the shape after cooling or drying.
The main part of wool fiber is the cortical layer composed of cortical cells. Cortical cells of wool felt contain high-sulfur and low-sulfur proteins. The former is the main component of the matrix, and its molecular chain is amorphous and coiled; the latter's molecular chain has a helical structure and forms basic fibrils in cortical cells . The basic fibrils are then formed into microfibrils, and the microfibrils are further formed into fibrils. All kinds of fibrils are embedded in the tomb, and the fibrils and the forensics can be connected by disulfide bonds. Some research data pointed out that the diameter of the fibrils in 0 cortical cells is about 0.25m, the diameter of microfibrils is 7.5nm (75A), and the diameter of basic fibrils is about 2nm.