What are biodegradable plastic bags and their classification
It is a plastic bag made of degradable plastic
Degradable plastics refer to the plastics which are easy to degrade in the natural environment by adding certain amount of additives (such as starch, modified starch or other cellulose, photosensitizer, biodegradable agent, etc.) in the production process of Bai.
Degradable plastics are generally divided into four categories:
1. Photodegradable plastics
Adding photosensitizer into plastic, the plastic will decompose gradually under sunlight. It belongs to the earlier generation of degradable plastics. Its disadvantage is that the degradation time is difficult to predict due to sunshine and climate change, so the degradation time can not be controlled.
2. Biodegradable plastics
Plastics that can be completely decomposed into low molecular compounds under the action of microorganisms. It is characterized by convenient storage and transportation, as long as it is kept dry and does not need to be protected from light. It can be used not only in agricultural film and
packaging bags, but also 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, which has the characteristics of both light and microorganism degradation of plastics.
4. Water degradable plastics
Water absorbent material is added to plastics, which can be dissolved in water after use. It is mainly used in medical and health appliances (such as medical gloves), which is convenient for destruction and disinfection.