Green and environment-friendly packaging bag and preparation method thereof

Abstract

The invention relates to a green and environment-friendly packaging bag and a preparation method thereof. The green and environment-friendly packaging bag is composed of the following components in parts by weight: 30-50 parts of low-density polyethylene, 15-30 parts of linear polyethylene, 60-80 parts of epoxy resin, 3-5 parts of a plasticizer, 5-8 parts of a coupling agent, and 80-150 parts of modified polylactic acid. A preparation method of the modified polylactic acid comprises the following preparation steps: a, pretreatment: heating and stirring a modified solution under an acidic condition, wherein the modified solution is composed of mixed colloid and plant fiber filler, and the mixed colloid is composed of starch, hyperbranched polyacrylate and cresyl diphenyl phosphate; and b, modification treatment: heating and mixing polylactic acid and the modified liquid pretreated in the step a in a negative pressure vacuum state, and thus preparing the modified polylactic acid. The green and environment-friendly packaging bag has the advantage of being capable of being rapidly degraded under the natural environment condition.

Description

technical field [0001] The application relates to the technical field of plastic film, more specifically, it relates to a green environmental protection packaging bag and a preparation method thereof. Background technique [0002] Plastic bags are indispensable items in people's daily life and are often used to hold other items. It is widely used because of its cheap, extremely light weight, large capacity, and easy storage. [0003] Most of the plastic bags in the related art are made of polyethylene as the main raw material. Through the polyethylene material, plastic bags are endowed with many excellent physical and chemical properties, but it is precisely because the structure of polyethylene is relatively stable that it is not easy to be degraded by natural microorganisms under natural environmental conditions, which in turn brings unmanageable troubles to the environment. That is "white pollution". [0004] The plastic bags made by the above technology cannot be degr...

AI Technical Summary

Problems solved by technology

Through the polyethylene material, plastic bags are endowed with many excellent physical and chemical properties, but it is precisely because the structure of polyethylene is relatively stable that it is not easy to be degraded by natural microorganisms under natural environmental conditions, which in turn brings unmanageable troubles to the environment. "White Pollution"

[0004] The plastic bags produced by the above technology cannot be degraded quickly under natural environmental conditions, and generally can only be slowly degraded underground through landfill methods, and the degradation process lasts for decades

Therefore, if the plastic bag cannot be disposed of in time, it will bring greater pressure to the lack of arable land, which is not environmentally friendly.

Images