Introduction to Compostable Materials
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Introduction to Compostable Materials

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Compostable materials are materials that can be degraded in the sense of thermodynamics and kinetics over a period of time. According to the external factors of degradation, it can be divided into: photodegradable materials, biodegradable materials, etc. The main factors affecting degradation are temperature, molecular weight, and material structure.

In the future, compostable materials will be a development trend. Now let's have a deeper understand of compostable materials

1. The meaning of compostable materials

compostable materials refer to materials that are compostable in the natural environment. A certain amount of additives (such as starch, modified white starch or other cellulose, photosensitizers, biodegradants, etc.) is added during the production process of these materials to reduce their stability and the materials will become easily degraded.

shipping bags

2. Classification of compostable materials

Compostable materials are generally divided into four categories

a. Photodegradable material

Photodegradable material is plastics mixed with photosensitizers, which make the plastics gradually decompose under sunlight. It belongs to an earlier generation of compostable materials. Its disadvantage is that the degradation time is difficult to predict due to sunlight and climate changes, so the degradation time cannot be controlled.

b. Biodegradable material

Biodegradable material is material that can be completely decomposed into low-molecular compounds under the action of microorganisms. It is characterized by convenient storage and transportation. It only needs to be kept dry and does not need to be protected from light. It has a wide range of applications. It can not only be used for agricultural mulch film and packaging bags, but also widely used in the field of medicine. With the development of modern biotechnology, more and more attention has been paid to biodegradable material, and biodegradable material has become a new generation of research and development hotspots.

c. Photo-biodegradable material

Photo-biodegradable material is a kind of compostable material that combines photodegradation and microbial degradation. It has the characteristics of photodegradation and microbial degradation at the same time.

d. Water-degradable materials

Water-degradable material is material that add water-absorbing substances to plastics and dissolve them in water after use. It is mainly used for medical and sanitary appliances (such as medical gloves), which is convenient for destruction and disinfection. Tests have shown that most compostable materials begin to become thinner, lose weight, and decrease in strength after being exposed to the general environment for 3 months, and gradually break into fragments. But if these compostable materials are buried in garbage or soil, the degradation effect is not obvious.

As a company that produces packaging products, our products use compostable materials. Our products include various products such as compostable bags. We have always taken sustainable development as our goal, hoping to provide customers with more environmentally friendly choices.


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