Such as polyethylene, polypropylene, etc. Plastic products can also be classified according to their different materials and properties. Common thermosetting plastics include bakelite, electric jade, decorative panels and unsaturated polyester plastics. 　　

Flame-retardant plastics, this kind of plastics can burn in a strong open flame, and will extinguish soon after leaving the fire. The cured plastic has a hard texture and is insoluble in any solvent, and it cannot be softened again by heating. For example, our common mineral water bottles, plastic bags, etc. It will decompose if the heating temperature is too high., these plastics are classified as dangerous goods. For details, listen to what Linyi plastic products wholesale manufacturer tells? 　　 　

Flammable plastics, this kind of plastic burns violently when exposed to an open flame and is not easy to extinguish.There are many types of plastic products, each of which has its own unique advantages. Different types of products are used differently. It can be seen that the material of plastic is different, and each kind of plastic product made is different, so when we choose a product, we must choose the material according to the type of product to ensure the time during use. 　　

Combustible plastics, this kind of plastics burns in an open flame and has no self-extinguishing properties, but the burning speed is faster. Kitchen Storage Cabinets Manufacturers Common thermoplastics are: nitrocellulose plastic, acetate fiber plastic, polyethylene plastic, polypropylene plastic, polystyrene plastic, polyvinyl chloride plastic and so on. 　　

Thermoplastics: This type of plastics is characterized by being softened by heat and hardened by cooling. Such as nitrocellulose plastics, etc. 　　

According to the performance after heating: Thermosetting plastics: This type of plastics is characterized by being cured and formed after a certain time of heating or adding a curing agent at a certain temperature. Such as phenolic plastic, cellulose acetate plastic, polyvinyl chloride plastic and so on. Generally, there are only physical changes during the processing while maintaining its chemical nature. Most of the resins of this type of plastic are made by addition polymerization

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This requires the plastic degradation problem to be solved. Common plastic lunch boxes, coffee cups and other materials that can withstand boiling water temperature are polystyrene . Since 2005, Yang Jun's team has begun to study plastic biodegradation. It should not be limited to microorganisms. Boat borers and borer mussels in the ocean can erode polyethylene and submarine cables.01%-3% in 4 months. Authoritative investigations have shown that in the microbial community of soil, sludge, rotting garbage, or manure, polystyrene, such as plastic, only degrades in the range of 0.

The mechanism of the degradation of polystyrene by the yellow powder larvae: first, the foam is chewed into small pieces by the yellow powder larvae and ingested into the intestine; second, the chewing effect increases the contact area of ​​the polystyrene foam with microorganisms and extracellular enzymes. can be considered. In 2015, Professor Yang Jun's research group from Beijing University of Aeronautics and Astronautics, and Dr. Mainly attack the degradation of plastics such as polystyrene which is difficult to degrade Yang Jun believes that the idea of ​​biodegradable plastics should be developed.

The foam plastic may continue to degrade in the insect dung.Due to the inability of natural degradation of plastic, it has become the enemy of mankind and has led to the tragedy of many animal deaths. For example, monkeys, pelicans, dolphins and other animals in the zoo will mistakenly swallow plastic bottles thrown away by tourists, leading to indigestible and painful death; when I look at the beautiful and pure sea, I look closer, and they are actually full of various All kinds of plastic garbage that could not be contained in the ocean, various indigestible plastics were found in the intestines of many dead seabird samples.

The ingested fragments are further depolymerized into small molecular products under the action of extracellular Plastic Storage Boxes enzymes secreted by the intestinal microorganisms; third, these small molecular products are further degraded and assimilated to form the larva itself under the action of a variety of enzymes and the yellow powder larvae's own enzymes Tissue: The residual foam fragments and some degradation intermediates in the fourth step mix part of the intestinal microorganisms and are excreted in the form of insect dung。

Separation and cloning of key enzymes and their genes that can produce active groups in organisms. Tenebrio molitor, also called breadworm, belongs to Coleoptera, Paediata family, and Mealworm genus (Paediata) in insect taxonomy. Lepidoptera insects, termites, etc. co-published two sister research papers in authoritative journals in the field of environmental sciences, proving that the larvae of yellow mealworm (breadworm) are degradable Hard-to-degrade plastics such as polystyrene.. Professor Yang Jun introduced that in 2013, the global consumption of 299 million tons of plastic, of which polystyrene plastic accounted for 7%, consumes about 21 million tons per year

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