soya Protein Fiber (SPF) is the only protein fiber made from soybean cake. Their physical properties are the same as that of synthetic fiber. It gives tremendous change in properties like smoothness/luster/comfort/absorbency/strength/shrinkage when mixing with other fibers. For example; when soybean fibers mix with cashmere, it gives smooth quality with an enhancement of easy care properties. As a wool/soy protein fiber, it reduces shrinkage and increases ease of care. As a silk blend, it improves the properties of silk with the prevention of the fabric from sticking to the skin when wet. In spite of this, SPF is the only renewable botanic protein fiber. Its 16 amino acids are healthy and nutritional to people's skin. This fiber basically comes from soybean; plant massive in sourcing and rich in nutrition. It is a kind of an active fiber shows the superiorities of many natural fibers and synthesized one. Processability/Pretreatment: SPF has different physical & chemical construction from natural protein fiber. During the production process, we should select fit equipment and proper set Firstly, protein is distilled from soybean cake & refined. Secondly, Use auxiliary agent & biological enzyme which make changes in the spatial structure of the spherical protein. After that, Protein spinning liquid is connected by adding high polymers