▎ 摘　　要

NOVELTY - Food preservative comprises 25-55 pts. wt. polyethylene resin, 5-20 pts. wt. graphene, 2-10 pts. wt. titanium dioxide, 2-8 pts. wt. polybutylene succinate, 2-8 pts. wt. silicon carbide, 2-8 pts. wt. magnesium oxide, 2-8 pts. wt. stone powder, 1-6 pts. wt. sodium diethyldithiocarbamate and 1-6 pts. wt. sodium stearate. USE - Food preservative (claimed). ADVANTAGE - The food preservative has no-toxic side effects, and effectively restrains the growth of bacteria in food thus preventing food from spoilage. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the method for preparing the food preservative, which involves (a) weighing each raw materials, (b) crushing polyethylene resin, graphene, titanium dioxide and polybutylene succinate, adding 100 pts. wt. cyclohexanone, ultrsonically dispersing, transferring the mixture to a mixer, mixing, leaving and suction filtering to obtain a mixture (I), (c) adding the mixture (I), silicon carbide, magnesium oxide, stone powder, sodium diethyldithiocarbamate and sodium stearate to a reaction kettle and reacting to obtain a mixed solution (II), and (d) transferring the mixture (II) to a twin-screw extruder, extruding, plastifying, blowing and drying to obtain the finished product.