The present invention relates to the field of fibers, and in particular, to a preparation method for a
protein composite
fiber. The preparation method comprises
spinning, pretreatment, surface treatment, preparation of modified mineral
powder, loading, mixing and crosslinking. A pretreated nascent
fiber is immersed in a
protein composite solution to be in full contact with modified extract mineral
powder and a soluble
protein, and a crosslinking reaction is carried out; the structure of the dried
fiber is more compact; the extract and the soluble protein are more stable in the fiber while the
fiber strength is improved; and the
loss rate is less than 1% after washing for 50 times. The protein composite fiber prepared by the present invention is
skin-friendly and soft, has good
moisture absorption and moisturizing effects, and is rich in
amino acid and protein, wherein the content of the protein is up to about 12%. Moreover, in the present invention, a common fiber is used as a base material, thereby achieving natural antibacterial, anti-oxidation and deodorizing effects while endowing fibers such as
viscose, acrylic fibers,
polyester, chinlon, vinylon, and
polypropylene fibers with the advantages of a natural protein on the basis of ensuring excellent properties of the base material itself, and thus the range of application is wider.