▎ 摘　　要

NOVELTY - Biodegradable polypropylene terephthalate-based elastic sealing material comprises 15-30 pts. wt. of nano inorganic particles, 50-75 pts. wt. of PBAT, 0-25 pts. wt. of PBT, 2-10 pts. wt. of PLA, 0.5-2 pts. wt. of coupling agent, 8-41 pts. wt. of plasticizer, 0.5-2 pts. wt. of antioxidant, 0-4 pts. wt. colouring agent, 0-0.2 pts. wt. of graphene, where the mass percentage of the nano inorganic particles is 16-19 wt.%, where the nano inorganic particles are selected from calcium carbonate, talcum powder, phosphogypsum, silicon dioxide and calcite powder in any one or more than two the plasticizer is selected from epoxy soybean oil, epoxy soybean oil acid octyl ester, acetyl tributyl citrate and 4, 5-epoxy tetrahydro phthalic acid in any one or more than two. USE - Biodegradable PBAT-based elastic sealing material in the sealing of refrigerators or freezers (claimed). ADVANTAGE - The PBAT base elastic sealing material does not affect the normal processing technique of the resin and improves the softness and resilience of the product, it can effectively reduce the material cost while maintaining the biodegradable and compostable characteristics. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing PBAT-based elastic sealing strip by the biodegradable PBAT-based elastic sealing material, which involves: 1. mixing the nano inorganic particles with PBAT, PLA, coupling agent plasticizer, antioxidant agent and graphene according to 100-120 ° C; 2. stirring uniformly, melting, extruding and pelletizing the uniformly stirred mixture at 160-180℃.