Preparation method of bio-based weather-resistant environment-friendly packaging bag

Abstract

The invention relates to the technical field of environment-friendly bag production, and discloses a preparation method of a bio-based weather-resistant environment-friendly packaging bag, during processing, the mass of added polylactic acid is 50 kg, the mass of added starch is 11 kg, and during primary processing, the rotating speed of a stirrer is 45 circles per minute, and the packaging bag is uniformly stirred by regulating the rotating speed. In the processing process in the step S2, the adding mass of thermoplastic polyurethane is 11.5 kg, polylactic acid is added, production of the environment-friendly plastic bag is facilitated, the lactic acid bacteria are glucose obtained by saccharifying a starch raw material, and the content of the glucose in the starch raw material is reduced; the high-purity lactic acid is prepared by preparing lactic acid from glucose and certain strains through fermentation and then adopting a chemical synthesis method, so that the high-purity lactic acid can be completely degraded by microorganisms in nature, only carbon dioxide and water can be decomposed finally, the harm to the environment is extremely small, and a certain production assisting effect can be achieved by adding starch.

Description

technical field [0001] The invention relates to the technical field of environmental protection bag production, and more specifically, the invention relates to a preparation method of a bio-based weather-resistant environmental protection packaging bag. Background technique [0002] Due to the rapid development of society, qualitative changes have taken place in people's lives, and more and more new types of convenient packaging bags have gradually come into people's eyes. Among them, the most representative packaging bag product is plastic bags. Because plastic bags are Bags made of plastic as the main raw material have the advantages of low cost, extremely light weight, large capacity, and easy storage, etc., and then become an indispensable item in people's daily life, and are often used to hold other items; [0003] However, due to the extremely long degradation cycle of plastic bags, the fact that they are not easily degraded by natural microorganisms, and the post-proc...

AI Technical Summary

Problems solved by technology

[0003] However, due to the extremely long degradation cycle of plastic bags, the fact that they are not easily degraded by natural microorganisms, and the post-processing is relatively difficult, the side effects brought about by them have gradually emerged, which is extremely harmful to the land and will change the pH of the land. , seriously pollute the soil, affect the absorption of nutrients and water by crops, and then lead to agricultural production reduction, and will affect the sustainable use of its land, and if it is incinerated, the harmful smoke and toxic gases produced will also cause pollution to the atmosphere. The environment causes certain pollution and at the same time poses a great threat to the survival of animals. For example, waste plastic bag products discarded on land or in water bodies are often swallowed by animals as food, resulting in animal death;

[0004] Due to the excessive impact of plastic bags in the later stage, many countries and places have begun to ban the use of plastic bag products one after another. At the same time, under this background, bio-based environmentally friendly packaging bags have gradually appeared in people's real life. Because it is made of recyclable and self-degradable materials, and its own harm is far less than that of plastic bags, more and more countries and places are beginning to encourage the use of bio-based environmental protection. Packaging bags are used to replace plastic bag products, but because bio-based environmentally friendly packaging bags are currently in the early stages of development, there are still certain defects, such as their own relatively poor weather resistance and relatively short service life, which in turn will lead to certain economic losses. Waste, so now there is an urgent need for a bio-based environmentally friendly packaging bag with strong weather resistance