Regarding household plastic trays, many people are unable to distinguish between old and new materials. Actually, it's true. Many people who are not factory staff don't know what kind of tricks are involved. In the production process of new plastics, new plastic materials are received, and the product has good transparency and bright colors. Plastic is a recyclable resource that can be received and then deceived. The received plastic products can be sorted, crushed, and processed to add a certain amount of new materials in the production of plastic products. How do we distinguish in our daily lives?

From the perspective of physical and mechanical functions, old materials are made from waste products. After being exposed to wind and sun, the plastic surface has aged and degraded. It has also undergone multiple high-temperature processing, melting, and plasticization. Under the effects of light, oxygen, and high temperature, some polymers are oxidized, causing chain breakage and degradation, resulting in a decrease in physical and mechanical functions. The more times it is reused, the more severe the decrease.

Anything that is transparent is better than anything that is opaque, regardless of the color. Good gloss is better than no gloss, that is, the color of the material surface. When it is possible to ignite and observe whether the flame color is smoking, after blowing it back to life, use an iron object to quickly contact the molten body, and then quickly swing it open to see if the wire is formed evenly. If it is uniform, it is good material. After pulling it a few times, overlap the wire and swing it open again to see if it has elasticity. If it can be swung open again without interruption or if it breaks after a certain distance, it is good material.

Article source: Plastic tray manufacturerhttp://www.jmhongshengyuan.com