Preparation method of environment-friendly biodegradable PBAT foaming material

Abstract

The invention discloses a preparation method of an environment-friendly biodegradable PBAT foaming material, and belongs to the technical field of degradable foaming materials. The preparation method of the environment-friendly biodegradable PBAT foaming material comprises the following steps: putting 30-60 parts of a butylene adipate polymer and 10-40 parts of polylactic acid into a screw extruder I, adding 1-5 parts of organic modified montmorillonite, and melting to form a hot melt I with fluidity; putting 1-30 parts of a molecular chain modifier and 1-10 parts of a degradation agent into a screw extruder II, and melting to form a hot melt II with flowability; putting 5-10 parts of thermoplastic starch and 1-3 parts of plant fibers into a stirrer, and stirring; feeding the hot melt I, the hot melt II and the mixture into a screw reactor, and then adding 1-10 parts of a chain extender; the reaction melt discharged from the outlet of the screw reactor is pumped into a screw extruder III; according to the invention, the reduction of rigidity and heat resistance of the material caused by PBAT is compensated, and good water-proof and heat-insulation functions are maintained while the degradation capability is ensured.

Description

technical field [0001] The invention relates to the technical field of degradable foaming materials, in particular to a preparation method of environmentally friendly biodegradable PBAT foaming materials. Background technique [0002] High molecular polymers have been widely used in the manufacture of all fields related to human life from aircraft to clothing, but because most of the polymers are derived from organic hydrocarbons, their waste cannot be degraded for decades or even hundreds of years, while Such polymers can be made directly or foamed into daily-use packaging materials, lunch boxes, consumables, electronic films, agricultural films and other fast-consumables. China alone produces millions of tons of non-degradable lunch boxes and non-degradable plastic packaging bags every year, and the average service life is less than 20 minutes. It has brought immeasurable pressure on the environment and resources, and the whole society, including the government, enterpris...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the prior art that while improving its degradability, it is often difficult to ensure its good physical properties such as tensile strength, so that although the foam material can be degradable, its own strength and the like are not enough. It is not durable and has poor thermal insulation performance, which seriously deviates from the original intention of the product, and the proposed method for the preparation of environmentally friendly biodegradable PBAT foaming materials