What raw materials are biodegradable plastic bags made from?

With the increasing environmental awareness of mankind and the popularity of biodegradable plastic bags, many people may wonder what biodegradable plastic bags are made of and why they have biodegradable and compostable properties.

Usually biodegradable bags and compostable bags are made by PBAT+Corn Starch+PLA，some biodegradable bags maybe only made by PBAT

+Corn starch. In fact, add the PLA into the biodegradable bag,it can improve the quality of the bags.

What is PBAT?

PBAT stands for Polybutylene Adipate Terephthalate. It is a type of biodegradable and compostable polymer or plastic. PBAT is commonly used in the production of biodegradable and compostable plastics, especially for packaging materials and disposable items. It is derived from renewable resources like corn starch, making it more environmentally friendly compared to traditional plastics made from fossil fuels.

PBAT is known for its ability to biodegrade in natural environments under certain conditions, such as exposure to heat, moisture, and microorganisms. This makes it a popular choice for single-use and disposable items like bags, utensils, and food packaging, as it can reduce the environmental impact associated with conventional plastics.

As the main raw material for the production of biodegradable plastic bags, the film blown from PBAT is very soft and will have strong stretching properties, so it is necessary to add other biodegradable raw materials mixed to ensure the performance of the bags.

What is PLA？

Polylactic acid, also known as polylactide, is a polyester polymer obtained by polymerizing lactic acid as the main raw material. It is a new type of biodegradable material ,it is made from renewable resources, such as corn starch or sugarcane. 

Blown films made from PLA are hard and strong and are usually mixed with PBAT and starch.

Because of its unique properties, PLA is also used for injection molded products and is widely used.

Adding PLA to biodegradable plastic bags increases the stiffness of the bag, reduces the stretching of the bag and improves the quality of the bag.

China manufacturer of biodegradable bags and compostable bags