Biodegradable sheet and preparation method thereof

Abstract

The invention provides a biodegradable sheet material and a preparation method thereof, and relates to the technical field of biodegradable sheet materials, and the biodegradable sheet material is prepared from a biodegradable polymer. The biodegradable sheet material is prepared from polylactic acid, a polyhydroxyalkanoate polymer, food-grade starch, modified cellulose, a filling agent and polycaprolactone, the biodegradable sheet is prepared from the following components in percentage by mass: 50 to 60 percent of edible-grade starch, 10 to 20 percent of polylactic acid, 2 to 5 percent of polyhydroxyalkanoate polymer, 5 to 8 percent of modified cellulose, 2 to 10 percent of polycaprolactone and 5 to 10 percent of filler, wherein the edible-grade starch, the polylactic acid, the polyhydroxyalkanoate polymer, the modified cellulose and the polycaprolactone are used as raw materials. The preparation method solves the problems that a preparation method of a traditional degradable sheet is tedious, the degradation effect is common, after the sheet is put into use, the degradation period is long due to the poor degradation effect, and the environmental protection strength of the sheet is reduced to a certain extent.

Description

technical field [0001] The invention relates to the technical field of biodegradable sheets, in particular to a biodegradable sheet and a preparation method thereof. Background technique [0002] Plastic sheet refers to the plastic coil with a thickness of about 0.1-2.0mm after heating and melting plastic raw materials in a plastic extruder or plastic calender. Such materials mainly include PVC, PET, PS , PP, ABS, etc., are divided into extruded sheet and calendered sheet according to different processing; according to different uses, they can be divided into food grade, medical grade and ordinary grade; according to whether the materials used are mixed with recycled materials, they can be divided into It is brand-new material, first-grade material A grade, second-grade recycled material B grade, sheet material is mainly used in blister industry and plastic printing industry, and has a wide range of uses. Degradable plastic refers to a class of products whose performance can...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the preparation method of traditional degradable sheets in the prior art is relatively cumbersome, and the degradation effect is average. After being put into use, the degradation effect is poor and the degradation period is long, which reduces the degradation of the sheet to a certain extent. Due to the shortcomings of the environmental protection strength of the material, a biodegradable sheet and its preparation method are proposed

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