What is a biodegradable plastic bag?
可降解塑料袋是在生产过程中加入一定量的添加剂，如淀粉、变性淀粉或其他纤维素、光敏剂、生物降解剂等，使得其在自然环境中容易降解。可降解塑料袋既不会污染环境，又可以回收利用。
Biodegradable plastic bags are produced by adding a certain amount of additives, such as starch, modified starch or other cellulose, photosensitizers, biodegradable agents, etc., to make them easy to degrade in the natural environment. Biodegradable plastic bags do not pollute the environment and can be recycled.
塑料的降解是指聚合物生命周期的结束和分子量的减少，表现为脆性、开裂、软化、硬化和机械强度的损失。普通塑料袋的降解需要几十年甚至几百年的时间，填埋或焚烧不可降解塑料袋会污染环境，因此，可生物降解塑料袋是一项颇有意义的发明。
The degradation of plastics refers to the end of the polymer life cycle and the reduction of molecular weight, manifested as brittleness, cracking, softening, hardening, and loss of mechanical strength. The degradation of ordinary plastic bags takes decades or even hundreds of years, and landfill or incineration of non degradable plastic bags can pollute the environment. Therefore, biodegradable plastic bags are a significant invention.
可降解塑料袋又可分为光讲解塑料，生物讲解塑料，水降解塑料
Degradable plastic bags can also be divided into light degradable plastics, biological degradable plastics, and water degradable plastics
光降解塑料：光降解塑料是在塑料中掺入光敏剂，在日照下使塑料逐渐分解。光降解塑料属于较早一代的降解塑料，其缺点是降解时间因日照和气候变化而难以预测，因而无法控制降解时间。
Photodegradation plastic: photodegradation plastic is a kind of plastic mixed with photosensitizer to gradually decompose under sunlight. Photodegradation plastics belong to an earlier generation of degradable plastics. Its disadvantage is that the degradation time is difficult to predict due to sunshine and climate changes, so the degradation time cannot be controlled.
生物降解塑料：生物降解塑料是在微生物的作用下，可完全分解为低分子化合物的塑料。其特点是贮存运输方便，应用范围广，不但可以用于农用地膜、包装袋，也可广泛用于医药领域。
Biodegradable plastics: Biodegradable plastics are plastics that can be completely decomposed into low molecular weight compounds under the action of microorganisms. Its characteristic is convenient storage and transportation, with a wide range of applications. It can not only be used for agricultural film and packaging bags, but also widely used in the pharmaceutical field.
水降解塑料：水降解塑料是在塑料中添加吸水性物质，用完后弃于水中即能溶解掉，主要用于医药卫生用具方面（如医用手套）。
Water-degradable plastic: Water-degradable plastic refers to the addition of absorbent substances to plastic, which can be dissolved when discarded in water after use. It is mainly used in medical and sanitary equipment (such as medical gloves).
