Home >> News

The Main Components and Types of Biodegradable Plastics

Dec. 10, 2020

Biodegradable plastics are human and environmentally friendly items made from plant straws. It is different from the three major synthetic plastics. After being discarded, it can be decomposed by itself under the action of the biological environment, and it is harmless to people or the environment. It belongs to green packaging.

The degradable plastic bag is a one-time shopping bag that is “degradable and easily degradable”. Biodegradable Plastic Bags can be divided into two types according to their raw materials and decomposition factors:

One is a Plastic Bag made of polyethylene plastic as the main ingredient and blended with biodegradable agents such as starch. It is also called a biodegradable plastic bag. This kind of plastic bag is decomposed mainly by microorganisms.

The other is a plastic bag made of polyethylene plastic as the main component, mixed with a photodegradation agent and mineral powder such as calcium carbonate, which is also called a photodegradable plastic bag. This plastic bag is decomposed under the action of sunlight.

Biodegradable Plastic Bags

Biodegradable Plastic Bags

Biodegradable plastic refers to a type of plastic that is degraded by the action of microorganisms in nature, such as bacteria, hail fungus and algae. The ideal biodegradable plastic is a polymer material that has excellent performance, can be completely decomposed by environmental microorganisms after being discarded, and is finally inorganicized to become a component of the carbon cycle in nature.

"Paper" is a typical biodegradable material, and "synthetic plastic" is a typical polymer material. Therefore, biodegradable plastic is a polymer material that combines the properties of "paper" and "synthetic plastic". Biodegradable plastics can be divided into completely biodegradable plastics and destructive biodegradable plastics.


Biodegradable plastics: Destructive biodegradable plastics currently mainly include starch modified Polyethylene PE, polypropylene PP, polyvinyl chloride PVC, polystyrene PS and so on.

Completely biodegradable plastics: Completely biodegradable plastics are mainly made of natural macromolecules or agricultural by-products through microbial fermentation or synthesis of biodegradable macromolecules, such as thermoplastic starch plastics, aliphatic polyesters, polylactic acid, starch/polyethylene Alcohols belong to this type of plastic.