Therefore, biodegradable plastic is a polymer material with both 'paper' and 'synthetic plastic' properties. Under the action of microorganisms, low-molecular composite plastics can be synthesized. are all such plastics.. The ideal biodegradable plastic is a kind of polymer material with excellent performance. With the development of various industries, degradable garbage bags are becoming more and more popular.　　

Biodegradable plastics can be divided into two categories, one is destructive biodegradable plastics, and the other is fully biodegradable plastics. It can be used not only in medicine and food industry, but also in agricultural plastic film and packaging bags. Fully biodegradable plastic bags have the advantages of high standards, oil resistance, heat sealing, solvent resistance, etc.　

For example, thermoplastic starch plastics, starch/polyvinyl alcohol, aliphatic polyester, polylactic acid, etc. After being discarded, it will degrade on its own under the action of sunlight, water and other biological environments. After being discarded, it can be completely decomposed by environmental microorganisms to become inorganic substances and become a part of the natural carbon cycle.　　

At present, destructive biodegradable plastics mainly include starch modified (or filled) PE, PE Straps PS, PP, PVC, etc.Degradable garbage bags are plastics that are degraded by microorganisms such as bacteria, fungi, and algae. The degradable garbage bag is a packaging bag made of animal straw and starch that is harmless to the human body and the environment. 'Paper' is a typical biodegradable material, and 'synthetic plastic' is a typical polymer material.

In terms of quality, this degradable plastic bag has the characteristics of high softness, good hand feeling, strong tension and tensile strength, and is a good packaging bag. Therefore, this kind of packaging bag can be used in the catering industry, is clean and hygienic, and can be used safely. Therefore, it is harmless to humans and the environment and belongs to the green packaging plastic bag.Fully biodegradable plastics are mainly made from agricultural and sideline products or natural polymers (such as starch, cellulose, chitin) through microbial fermentation or synthesis