The material composition of biodegradable plastic bags is composed of PLA (polylactic acid) and PBAT (polyadipic acid), which are recognized as environmentally friendly materials and harmless green products. Under the condition of compost degradation, biodegradable plastic bags can be fully biodegraded within 180 days. The degradation products are carbon dioxide and water, which can be absorbed directly into the soil by plants, returned to the soil, or entered into the general environment to be degraded. The environment produces pollution, and it truly comes from nature and belongs to nature.
The use of biodegradable plastic bags greatly reduces the pollution of plastic products to the environment, truly achieves green environmental protection, health and hygiene, and can be used with confidence. The required degradation time of biodegradable plastic bags is related to the environment. In the general daily environment, even if the time exceeds six to nine months, it will not decompose and disappear immediately, but its appearance remains unchanged. The physical properties of the degradable bag begin to change, and the strength and toughness gradually deteriorate over time, which are all signs of degradation. Biodegradable plastic bags cannot be hoarded in large quantities, and can only be purchased in moderation. The storage requirements for storage are to keep them clean, dry, and not exposed to direct sunlight, and to pay attention to the principle of first-in, first-out storage management. Therefore, there is a contradiction for biodegradable plastic bags, which is that it is impossible to require fast degradability and long storage time. Biodegradable plastic bags can be degraded into carbon dioxide and water in 180 days under natural or industrial composting conditions without pollution to the natural environment.