The soybean protein fiber currently produced is short fiber, the cross section of the fiber is irregular dumbbell-shaped, longitudinally not smooth, grooved, and the protein content is 23%-25%, the rest is mainly PVA, and the protein is mainly discontinuous agglomerates. It is dispersed in the continuous PVA medium. This composition and structure make it have better moisture absorption and moisture conductivity and air permeability. Because the soybean protein itself is easy to yellow and the fiber is beige, it is difficult to bleach. It has good dry heat resistance, but poor moisture resistance. It shrinks more in a water bath above 100t. This is similar to polyvinyl alcohol fiber. It has good acid resistance and slightly poor alkali resistance. The protein is easy to hydrolyze, and PVA is also easy to swell. . Therefore, pay attention to damp and hot lye treatment when dyeing.
