Plastic materials for automobile headlights Headlights are an indispensable component of automobiles, which are related to lighting, signaling and decoration of automobiles. After years of development, degree of plasticization of headlight production has reached more than 96%. Main components of automobile headlights are composed of reflectors, lenses, shells, light sources, electronic circuits, and installation accessories. At present, main plastic materials used in automobile headlights in my country are PC, PP, ABS, PC/ABS, PMMA, PBT, PET, PA, BMC and a few other plastic materials. Plastics have advantages of light weight, corrosion resistance, good impact resistance, high transparency, good insulation, low thermal conductivity, good mechanical properties, strong plasticity, and molding processing. They are increasingly widely used in various fields.
Category: plastic raw material
So-called engineering plastics are industrial plastics that can replace metals and be used as industrial parts or shell materials. Engineering plastics need to have excellent comprehensive performance. Compared with general plastics, they can meet higher requirements in mechanical properties, heat resistance, durability, corrosion resistance, etc. In addition, they are easier to process and can replace metal materials.
Mobile phone products have huge market development space. At the same time, market is also in a stage of rapid development. This is an extremely important development stage for manufacturers, distributors and retailers, and is a stage where market structure is gradually taking shape. Therefore, in next few decades, design and processing of mobile phone casings and corresponding mold design will create huge business opportunities.
English name: Acrylonitrile Butadiene Styrene Specific gravity: 1.05 g/cm3 Molding shrinkage: 0.4-0.7% Molding temperature: 200-240℃ Drying conditions: 80-90℃ for 2 hours
Engineering plastics can be used as engineering materials and plastics that replace metal in manufacturing machine parts. Engineering plastics have excellent comprehensive properties, such as high rigidity, low creep, high mechanical strength, good heat resistance, and good electrical insulation. They can be used for a long time in harsh chemical and physical environments. They can replace metals as engineering structural materials, but they are more expensive and have smaller output.
There are many common plastic modification technologies, mainly reinforcement technologies, including fiber reinforcement, self-reinforcement, and molecular reinforcement; toughening technology; filling modification; blending and plastic alloy technology; flame retardant technology; nanocomposite technology; reaction grafting modification; aging resistance; functional modification, including conductive, antistatic, thermal conductive and luminescent, etc.; thermoplastic elastomer technology.
Aliphatic polyketone (POK) resin is a high-performance thermoplastic polymer. It is a linear crystalline polymer obtained by alternating copolymerization of carbon monoxide and ethylene. By adding propylene during copolymerization process, a terpolymer polyketone material (POK-ep) with a lower melting point and easier processing can be obtained. Its structural diagram is shown in figure below.
On the basis of general plastics and engineering plastics, through physical, chemical, mechanical and other methods, through filling, blending, reinforcement and other processing methods, performance of plastics is improved or functions are added, mechanical properties such as flame retardancy, strength, impact resistance, toughness of plastics are improved and enhanced, making plastics suitable for use in special electrical, magnetic, light, thermal and other environmental conditions.
Polycarbonate (PC) is an engineering plastic with excellent performance. It not only has high transparency and excellent impact toughness, but also is creep-resistant, non-toxic, has a wide operating temperature range, good dimensional stability, excellent electrical insulation and good weather resistance, so it is widely used in instrumentation, lighting appliances, electronic and electrical equipment, household appliances, packaging and other industries. In addition, with the rapid advancement of polymer material technology, new modified varieties of polymer materials continue to emerge, which also greatly expands its application fields. At the same time, its processing technology has attracted more and more attention from all aspects.
Because plastic is light in weight, has good toughness and is easy to form. Due to its advantages such as low cost, plastic is increasingly used instead of glass in modern industries and daily products. It is especially used in optical instruments and packaging industries, is developing particularly rapidly. However, due to requirement of good transparency, high wear-resistant parts, and good impact-resistant toughness, a lot of work must be done on plastic ingredients, the entire injection molding process, equipment, molds, etc. to ensure surface quality of these plastics used to replace glass (hereinafter referred to as transparent plastics) is good and meet requirements for use.
Gud Mould 