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, wherein the packaging bag comprises, 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 maleic anhydride, 1-5 parts of an ethylene-vinyl acetate copolymer, 0.1-1 part of an opening agent, 1-3 parts of an antibacterial agent,1-3 parts of talc powder, 1-3 parts of calcium carbonate, and 0.1-1 part of a chain extender. The preparation method comprises: raw material pretreatment, raw material mixing, extrusion granulation, granule mixing, extrusion film-blowing, and winding to prepare the packaging bag. According to the present invention, by using starch, PBAT and PLA as the raw materials, the degradation performance ofthe packaging bag is improved, the packaging bag is environmentally friendly, the cost is reduced, the consumption of petroleum-based resources is reduced, the antibacterial and antifungal propertiesof the packaging bag are improved, the safety of food is ensured, and the product has advantages of high strength, water resistance, oil resistance and durability during the use; and the packaging bagis prepared through blowing film forming by the blowing machine, such that the specification is controllable, the application range is wide, and the method is suitable for large-scale industrial production and promotion.

Description

technical field [0001] The invention relates to the technical field of biological packaging materials, in particular to a bio-based environmental protection packaging bag and a preparation method thereof. Background technique [0002] There are many types 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 weight. However, the extensive application of plastics has caused the world to generate up to 60 million tons of packaging waste every year, of which the annual plastic packaging waste in my country 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 enormous pressure to environmental protection. In order to comply with the trend of environmental protection in the world, vigorously promoting safe and non-toxic bio-based food packaging materials has become th...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the following problems in the prior art, such as poor antibacterial properties, 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

Images