Material selection of power adapter housing

　　1. Characteristics of PC plastics

　　Polycarbonate (PC for short) is a tough thermoplastic resin. Its characteristics are ① high strength, tensile strength 69MPa, bending strength 96MPa. ②High temperature resistance, long-term use can withstand 130 degrees Celsius temperature environment. ②Good transparency and non-toxic. ④Material color matching and surface coating are not as good as ABS. PC material has good and constant electrical insulation in a wide range of temperature and humidity, and is an excellent insulating material. At the same time, its good flame retardancy and dimensional stability make it form a broad application field in the electrical and electronic industry.

　　2. Characteristics of ABS plastic

　　Acrylonitrile butadiene Styrene copolymers (abbreviated as ABS) is a thermoplastic polymer material structure with high strength, good toughness and easy processing. It can perform normally in the environment of -25℃~60℃, and has good formability. The surface of the processed product is smooth and easy to dye and electroplating. Performance characteristics of ABS material: ① Low strength, tensile strength 43MPa, bending strength 79MPa. ②It is not resistant to temperature, and the long-term use temperature should not be higher than 60 degrees Celsius. ③ The fluidity, coloring and surface spraying and electroplating properties are all good. ABS materials are used in household appliances, panels, masks, assemblies, accessories, etc., especially household appliances, such as washing machines, air conditioners, refrigerators, fans, etc.

　　3. Characteristics of PC+ABS plastic

　　Acrylonitrile-Butadiene-Styrene (ABS) is a general-purpose thermoplastic polymer. The synthetic material of Pc and ABs, which takes the characteristics of the former two, has excellent molding performance, good fluidity and high strength (tensile strength 56MPa, bending strength 86MPa). PC+ABS material is easy to process, has good processing dimensional stability and surface gloss, is easy to paint and color, and can also perform secondary processing properties such as metal spraying, electroplating, welding and bonding. Because the characteristics of ABS combine the characteristics of its three components, it has excellent comprehensive performance, and it has become one of the preferred plastics for electrical components, home appliances, computers and instruments.

　　Summarize

　　the past two years. Whether it is in mold design, injection molding technology or coating performance, there are great breakthroughs, and the proportion of using PC materials as power adapter shells is increasing. According to preliminary estimates, the proportion of Pc materials used in the power adapter shell has exceeded 50%. ABS has poor temperature resistance and fire resistance, it is easy to melt at high temperature, and the adapter temperature is relatively high, so it cannot be used, so because other properties are better, such as wear resistance, it is generally used in low-voltage products, such as mobile phones, MP4 and so on. In addition, ABS+PC material is also commonly used, its temperature resistance is better than ABS, but worse than PC, but it can also be fireproof, so it is also used for some equipment with relatively high voltage and relatively low temperature.

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