Degradable plastic bags are made by adding a certain amount of additives during the production process, such as starch, modified starch or other cellulose, photosensitizers, biodegradants, etc., to make them easy to degrade in the natural environment. Degradable plastic bags will not pollute the environment and can be recycled.

The degradation of plastics refers to the end of the polymer life cycle and the reduction of molecular weight, manifested in brittleness, cracking, softening, hardening and loss of mechanical strength. It takes decades or even hundreds of years to degrade ordinary plastic bags. Landfilling or burning non-degradable plastic bags will pollute the environment. Therefore, biodegradable plastic bags are a very meaningful invention.

· photodegradable plastic  

Photodegradable plastics are mixed with photosensitizers in plastics, and the plastics are gradually decomposed under sunlight.

Photodegradable plastics belong to an earlier generation of degradable plastics. The disadvantage is that the degradation time is difficult to predict due to sunlight and climate changes, so the degradation time cannot be controlled.

· biodegradable plastic  

Biodegradable plastics are plastics that can be completely decomposed into low-molecular compounds under the action of microorganisms.

It is characterized by convenient storage and transportation, and a wide range of applications. It can be used not only in agricultural mulch and packaging bags, but also in the field of medicine.

· photo/biodegradable plastic  

Photo/biodegradable plastic is an ideal degradable plastic, which has the characteristics of both photodegradable and microbial degradable plastics.

Its degradation mechanism is: biodegradants such as starch are first biodegraded, weakening the polymer matrix, making the polymer matrix loose, thereby increasing the surface area.

· water degradable plastic  

Water-degradable plastics are water-absorbing substances added to plastics, which can be dissolved in water after use. They are mainly used in medical and sanitary appliances (such as medical gloves).