A category of regenerated fiber. It refers to the fiber made from protein extracted from milk, soybeans and other natural substances as raw materials and dissolved in appropriate solvents. The fiber began to realize industrial production in the 1930s. With the advent of many synthetic fiber, its production stopped one after another. In the 1990s, another producer extracted casein from milk and produced "a new generation of protein fiber" - Moksu fiber. For example, Toyo Textile Company in Japan uses milk as raw material to graft acrylonitrile into regenerated protein fibers. The fiber has silk like luster and soft feel, good moisture absorption and conductivity, good strength and extensibility, and is an excellent materials for making underwear. Soybean protein fibers have also been developed domestically, belonging to the category of regenerated protein fibers. Spherical protein was extracted from soybean dregs with oil extracted by chemical and biochemical methods. By adding additive, the spatial structure of protein was changed, and it was polymer blending with polyvinyl alcohol (PVA) to make spinning stock solution, which was made by wet spinning. The monofilament has fine size, low density, high strength, good acid and alkali resistance, cashmere like soft feel, silk like elegant luster, moisture absorption and moisture conductivity of cotton fiber fiber, wearing comfort and warmth retention of wool. In addition, there are also silkworm pupa protein fibers, regenerated silk fibroin protein fibers, etc.
Organic polymer materials -> Fiber -> Chemical fibers