How long is the degradation time of biodegradable plastic bags

For biodegradable plastic bags, many consumers have some misunderstandings. Some people think that biodegradable plastic bags will be degraded during use or in the air. This is a superficial understanding. In fact, the degradation of biodegradable plastic bags requires suitable temperature, humidity and microorganisms to degrade, and they will not be degraded during daily use or storage.

Another misunderstanding is that biodegradable plastic bags can only be degraded under composting conditions. In fact, biodegradable plastic bags can be biodegraded under composting conditions, and can also be biodegraded under other conditions, such as anaerobic degradation, and can also be biodegraded under natural environments such as soil and seawater. The specific chemical structure of degradable materials and products The formula, etc., are related to the degradation environmental conditions. Materials like PBAT are relatively easy to biodegrade under seawater, soil, and composting conditions, while PLA is relatively easy to biodegrade under composting conditions, while the degradation cycle or speed is relatively slow under seawater and soil conditions. Therefore, biodegradable plastic bags can be degraded not only under composting conditions, but also under other conditions such as soil. However, composting is a controlled condition. Relatively speaking, the process of biodegradation is easier to control.

The summary is: because of the different varieties and chemical structures of biodegradable plastic bags, the degradation is different under different conditions. Its degradation requires certain external environmental conditions, and it cannot be degraded in any environment. Its degradation conditions and environments can be various, such as in compost, soil, river water, sea water and other environments, it can be degraded under suitable conditions of temperature, humidity and microorganisms.

As a biodegradable plastic bag, in fact, the degradation time and natural conditions and the structure and formula of the degradable material have a certain relationship. If natural conditions do not provide some suitable conditions for the growth or life activities of microorganisms, the degradation of biodegradable plastic bags will be relatively slow. For example, when we are on the mountain, we can see that some branches, wood or paper on the sandy soil have not been degraded by the environment for a long time. This is the reason.

How long is the degradation time of biodegradable plastic bags?

Under natural conditions, bags made of PLA and PBAT materials can be completely degraded in 4-6 months; under composting conditions, they can be completely degraded in 5 months; in seawater, at about 25 degrees, It can be completely degraded in about 30-60 days.

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