Introduction to degradable plastic garbage bags

Biodegradable plastic garbage bags are items made from plant straw and other materials that are friendly to the human body and the environment. Unlike the three major synthetic plastics, they can decompose themselves under the action of the biological environment after being discarded, and are harmless to both humans and the environment. They belong to green packaging.
Biodegradable plastic bags are disposable shopping bags that are "biodegradable and easily degradable". Biodegradable plastic bags can be divided into two types based on their raw materials and decomposition factors: one is made mainly of polyethylene plastic mixed with biodegradable agents such as starch, also known as biodegradable plastic garbage bags. This type of plastic garbage bag mainly decomposes through the action of microorganisms. Another type is plastic bags made mainly of polyethylene plastic, mixed with photodegradable agents and mineral powders such as calcium carbonate, also known as photodegradable plastic garbage bags. This plastic garbage bag decomposes under the action of sunlight.
Biodegradable plastic garbage bags can be completely decomposed into low molecular weight compounds under the action of microorganisms. Its characteristic is convenient storage and transportation, as long as it is kept dry and does not need to be protected from light, and has a wide range of applications. In addition, it also has the following advantages: 1. It can reduce oil consumption; 2. Accelerate plastic recycling; 3. It does not contain toxic substances such as polyvinyl chloride and phthalates.
Photodegradable plastic garbage bags are made by adding photosensitizers to the plastic and gradually decomposing it under sunlight. It belongs to the earlier generation of degradable plastic garbage bags, with the advantages of simple production process and low cost; The disadvantage is that the degradation time is difficult to predict due to sunlight and climate change, and therefore cannot be controlled. Photodegradable plastic garbage bags can be divided into two types: copolymerized and additive. The former is a plastic composed of copolymers synthesized from carbon monoxide or carbon containing monomers with ethylene or other olefins. Due to the presence of chromogenic groups such as carbon groups and weak bonds on the polymer chain, it is easy to undergo photodegradation. The latter is made by adding photosensitizers such as benzophenone and para benzophenone to a universal plastic substrate, and the manufacturing technology is simple.