In the market, there are many kinds of plastics, but people who make plastics generally only know that they are divided into engineering plastics and daily plastics. In essence, plastics are classified as crystalline plastics and amorphous plastics. Crystalline plastic: nylon, propylene, ethylene, polyoxymethylene, etc.; Non-crystalline plastics: polycarbon, ABS, benzene, vinyl chloride, etc. Why is it divided into the above two categories? Due to different molecular structures. (1) The surface of the crystallized plastic is slippery, can't be painted, can't be chrome-plated, and it is difficult to decorate the surface. At present, the color of the coating is not durable and easy to fall off. For example, when the packaging bag is sprayed, printed, and colored, it is generally adopted to pass the electronic high current cone hair to print the color, but it is not durable, and the adhesive is difficult to find. (2) The surface of non-crystalline plastic can absorb other molecules, such as ink, chrome plating, spray coating, etc. Therefore, the general product shell, case, TV shell, etc. all use non-crystalline plastic, easy to decorate, not easy to fall off. However, the above two types of plastics must not be mixed together. If they are mixed together, they will be scrapped. The surface will be foamed, mercury-stained, and severely peeled. Therefore, two types of plastics should be mixed, otherwise the consequences will be great, so especially For waste plastics: to identify which kind of material should be picked apart before use, but there is no big impact on the mixing of similar plastics, such as propylene and ethylene mixed. Women'S Fitness Yoga Wear,Women'S Seamless Yoga Wear,Women'S Yoga Wear,High Stretchy Yoga Wear Shaoxing Yizhong Textile And Garment Co.,Ltd , https://www.yizhongsport.com