The plastic is a polymer material which has a resin as a main component and can be formed into a certain shape under a certain temperature and pressure, and can maintain a predetermined shape at a normal temperature. Plastic is a new type of polymer material industrialized in the early 20th century. It has been published for less than 100 years. However, due to its wide variety, excellent performance, strong market adaptability, convenient molding and low cost, it has shown great vitality in competition with other materials, and has now penetrated into the fields of industry, agriculture, national defense, scientific research and so on. All aspects have become an indispensable material in modern human life. Plastic products have also been widely used and rapidly developed in the field of packaging. First, the basic properties of plastic The plastic has the characteristics of light weight, high specific strength, excellent electrical insulation and chemical stability, and improved wear resistance, light transmission and vibration damping performance. The basic properties of plastic are as follows: 1 light weight, high specific strength. 2 Excellent electrical insulation performance. Some varieties, such as polyethylene, polystyrene, and PTFE, have low dielectric loss under high frequency or ultra high frequency conditions, so they are suitable for use as high frequency or ultra high frequency insulation materials, and are widely used in the telecommunications industry. Generators, transformers and various electrical switching devices. 3 chemical stability is good. Generally, plastics have good corrosion resistance to chemicals such as acids and bases. 4 wear reduction, good wear resistance. Most plastics have excellent wear, abrasion and self-lubricating properties. Many of the friction-resistant parts made of engineering plastics use these characteristics of plastics. When a solid lubricant and filler are added to the wear-resistant plastic, the friction factor can be reduced or the wear resistance can be further improved. 5 light transmission and protection performance is good. Most plastics can be made into transparent or translucent products, where polystyrene and acrylate plastics are as transparent as glass. Plexiglass (polymethyl methacrylate) can be used as aerospace glass material, and plastic films such as polyvinyl chloride, polyethylene, and polypropylene have good light transmission and heat retention properties, and are widely used as agricultural films. Plastics have a variety of protective properties, so they are often used as protective and packaging products, such as plastic film, boxes, barrels, bottles, etc. Ultrafine Silica Median Particle Size 2~4 Ultrafine Silica Median Particle Size 2~4,Silicon Oxide Powder,Silicon Carbide Powder,Silicon Dioxide Powder Changxing Wanxing Building Material Co., Ltd. , https://www.wxbuildingmaterials.com