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What is a degradable plastic bag?

Update:28 Dec 2019
Summary:

It is a plastic bag made of degradable plastic: 1、 Degr […]

It is a plastic bag made of degradable plastic:
1、 Degradable plastics:
Degradable plastic is a kind of plastic which is easy to degrade in natural environment after adding certain amount of additives (such as starch, modified starch or other cellulose, photosensitizer, biodegradable agent, etc.) in the process of production.
2、 Classification:
Degradable plastics are generally divided into four categories:
1. Photodegradable plastics
The photosensitizer is added into the plastic to decompose the plastic gradually under sunlight. It belongs to an earlier generation of degradable plastics. Its disadvantage is that the degradation time is difficult to predict due to sunshine and climate change, so it can not control the degradation time.
2. Biodegradable plastics
Under the action of microorganisms, plastics can be completely decomposed into low molecular compounds. The utility model has the advantages of convenient storage and transportation, as long as it is kept dry, does not need to be kept away from light, and has a wide range of applications. It can not only be used for agricultural mulch, packaging bags, but also widely used in the field of medicine. With the development of modern biotechnology, more and more attention has been paid to biodegradable plastics, which has become a new generation of research and development hotspot.
3. Light / biodegradable plastics
A kind of plastic which combines photodegradation and microorganism. It has the characteristics of photodegradation and microorganism degradation at the same time.
4、 Water degradable plastics
Add absorbent materials to plastics, which can be dissolved after being discarded in water. It is mainly used for medical and sanitary appliances (such as medical gloves), easy to destroy and disinfect.