What is a real biodegradable bag / film?

- Jan 12, 2020-

So what exactly is degradation?


Degradation refers to the conversion of high molecular polymers into small molecules such as water, carbon dioxide, and methane through biological and / or chemical reactions (bacterial decomposition, oxidation, light, etc.).


This is a process of changing the chemical structure of a substance.


The main material of the current plastic bag, PE (polyethylene), has a tight molecular structure, and it will take hundreds of years to gradually degrade. Looking for plastic bags that can degrade quickly in a short time, new materials must be needed.

A-PLA-Compostable-100-Biodegradable-food-packaging-polybag (1)

Indeed, there are already real biodegradable plastic bags: PBAT, PLA, etc.


PBAT-is a copolymer of aliphatic (butylene adipate) and aromatic (butylene terephthalate), which combines the excellent degradation properties of aliphatic polyesters and the good mechanical properties of aromatic polyesters . The processing performance of PBAT is very similar to LDPE, and the film can be blown with LDPE processing equipment.


PLA-Polylactic acid is made from starch raw materials proposed by renewable plant resources (such as corn, cassava, etc.). Starch raw materials are obtained through saccharification to obtain glucose, and then fermented with glucose and certain bacteria to produce high-purity lactic acid, and then a polylactic acid of a certain molecular weight is synthesized by a chemical synthesis method. It has good biodegradability. After use, it can be completely degraded by microorganisms in nature under specific conditions, and eventually generate carbon dioxide and water.


Shanghai Yifu Packaging specializes in producing all kinds of PLA full biodegradable products, PLA biodegradable bags / films, PLA biodegradable cups / lids, PLA biodegradable straws, PLA biodegradable gloves, PLA biodegradable fresh-keeping films, PLA biodegradable wrapping films ,and many more.

And has obtained EU EN13432, American ASTM D6400 and other certificates.