▎ 摘　　要

NOVELTY - A photodegradable plastic comprises acrylonitrile butadiene styrene (ABS) plastic layer and polybutylene terephthalate (PBT) plastic layer. Two sides of ABS plastic layer are clamped with PBT plastic layer to form a sandwich structure. Nano titanium dioxide is dispersed in ABS plastic layer. Nano silicon dioxide is dispersed in PBT plastic layer. The nano silicon dioxide is hollow spherical nano silicon dioxide. USE - The photodegradable plastic is used for vehicle plastic. ADVANTAGE - The photodegradable plastic has good mechanical performance, can be quickly degraded, reduces environmental pollution, and ensures product in actual use process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation of photodegradable plastic comprising dispersing nano titanium dioxide in ABS plastic, extruding into sheet-shaped ABS material, mixing nano silicon dioxide and PBT plastic, extruding into sheet-shaped PBT material, using single layer of sheet-shaped PBT material as bottom layer, spreading a layer of sheet-shaped ABS material as middle layer on surface of bottom layer, spreading a layer of sheet-shaped PBT material on surface of middle layer as surface layer to form a sandwich structure, and cooling and molding by hot pressing.