Super-absorbent ES composite fiber and preparation method thereof

The invention discloses a super-absorbent ES composite fiber and a preparation method thereof. The super-absorbent ES composite fiber has a skin-core structure, that is, the super-absorbent ES composite fiber is composed of a core layer and a skin layer, wherein the core layer is prepared from the following raw materials in parts by weight: 80-90 parts of polypropylene, 10-14 parts of polyethylene, 7-10 parts of maleic anhydride grafted polypropylene and 3-5 parts of nano silicon dioxide; the skin layer is prepared from the following raw materials in parts by weight: 60-70 parts of polyethylene, 11-15 parts of an ethylene-vinyl acetate copolymer, 6-9 parts of dibutyl maleate grafted polypropylene, 18-23 parts of sodium polyacrylate super-absorbent resin, 3-5 parts of nano silicon dioxide and 5-8 parts of aluminum trichloride. The super-absorbent ES composite fiber has the advantages of large moisture absorption constant, high water absorption rate, super-absorbent property, high water absorption rate, fast sp