A kind of bio-based environmental protection packaging bag and preparation method thereof

Abstract

The invention provides a bio-based environmental protection packaging bag and a preparation method thereof. The packaging bag comprises the following components by weight: 20-40 parts of corn starch, 50-70 parts of PBAT, 10-20 parts of PLA, 5-10 parts of glycerin, 0.1-1 part of lylic anhydride, 1-5 parts of ethylene-vinyl acetate copolymer, 0.1-1 part of opening agent, 1-3 parts of antibacterial agent, 1-3 parts of talc, 1-3 parts of calcium carbonate, chain extender 0.1-1 part; the preparation method is: raw material pretreatment-raw material mixing-extrusion granulation-pellet mixing-extrusion blown film-winding to make a packaging bag; the bio-based environmental protection packaging bag of the present invention is made of starch, PBAT PLA is used as the raw material, which improves the degradation performance of the present invention, is green and environmentally friendly, reduces the cost, and reduces the consumption of petroleum-based resources; and improves the antibacterial and mildew-proof performance of the packaging bag, ensures the safety of food, and the strength when used. Large, water-resistant, oil-resistant, and durable; it is blown into a packaging bag by a film blowing machine, with controllable specifications and a wide range of applications. It is also conducive to large-scale industrial production and easy to promote.

Description

technical field [0001] The invention relates to the technical field of biological packaging materials, in particular to a biological-based environmental protection packaging bag and a preparation method thereof. Background technique [0002] There are many kinds of food packaging materials allowed in my country, among which plastics are widely used in the field of food packaging due to their strong plasticity, low production cost and light quality. However, the large-scale application of plastics has resulted in 60 million tons of packaging waste every year in the world, of which my country's annual plastic packaging waste is about 2.8 million tons. The use of plastic food packaging materials not only wastes my country's precious oil resources, but also brings great pressure to environmental protection. In order to comply with the world's trend of environmental protection, vigorously promoting safe and non-toxic bio-based food packaging materials has become the future devel...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the following problems in the prior art, such as poor antibacterial performance, low mechanical properties, and short service life, the present invention provides a bio-based environmental protection packaging bag, which is characterized in that it contains the following components in parts by weight: 20-40 parts of corn starch, 50-70 parts of PBAT, 10-20 parts of PLA, 5-10 parts of glycerin, 0.1-1 parts of maleic anhydride, 1-5 parts of ethylene-vinyl acetate copolymer, 0.1-1 parts of anti-blocking agent, 1-3 parts of antibacterial agent, 1-3 parts of talcum powder, 1-3 parts of calcium carbonate, 0.1-1 part of chain extender

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