▎ 摘　　要

NOVELTY - Preparing completely biodegradable wrapping film, comprises: (i) uniformly mixing materials required for supporting layer and adhesive layer, adding into a double-screw extruder, plasticizing, dispersing, extruding and granulating to obtain the supporting layer modified material and bonding layer modified material; and (ii) passing the supporting layer modified material and the adhesive layer modified material by three-layer co-extrusion or film blowing technique to prepare the wrapping film, where the bonding layer, the adhesive layer and the supporting layer are sequentially arranged from top to bottom. USE - The completely biodegradable wrapping film is used for packaging goods, preferably electronics, building materials, chemical engineering, metal products, automobile accessories, wire and cable, daily necessities, food and paper making industries. ADVANTAGE - The completely biodegradable wrapping film has high light transmittance, low haze, high self-adhesive property, and excellent tensile strength and elongation break strength, and the used main raw material meets the biodegradable requirements. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a completely biodegradable wrapping film, prepared by the above-mentioned method.