In machining production, plastic machining is one of the commonly used raw materials. Due to the variety of plastics, when processing, operators need to have a comprehensive understanding of the materials in order to better play the properties of plastic raw materials. In the production of commonly used plastics are: ABS, PE, PP and so on, commonly used transparent plastics are: PC, PS, PMMA, etc. The hook net will be introduced in detail below.
The Characteristics of commonly used plastics
1. ABS acrylonitrile butadiene propylene
This kind of plastic has excellent resistance to attack, heat resistance, low temperature resistance, chemical resistance and electrical properties. It also has the characteristics of easy processing, stable product size and surface luster. It is easy to paint and color. It can also be used for metal spraying, electroplating and welding on the surface. It is widely used in machinery, automobile, electronic and electrical fields.
2. PE polyethylene
Polyethylene is odorless, nontoxic and wax like in hand. It has excellent low temperature resistance, good chemical stability, resistance to most acid and alkali corrosion, insoluble in ordinary solvents at room temperature, small water absorption and excellent electrical insulation performance.
3. PP polypropylene
Non toxic, tasteless, low density, strength, stiffness, hardness milk toughness are better than low pressure polyethylene, can be used at about 100 degrees. It has good electrical properties and high-frequency insulation, not affected by humidity, but brittle at low temperature, not wear-resistant, easy to aging. It is suitable for making general mechanical parts, corrosion-resistant parts and insulating parts.
The Characteristics of transparent plastics
1. PC polycarbonate
This kind of plastic is colorless, transparent, high-temperature resistant, has the strength similar to non-ferrous metals, and also has ductility and toughness. Its impact strength is very high. It can not be damaged by hammering. It can withstand the explosion of TV screen. It can be used repeatedly and can be applied with any coloring.
2. PS polyphenylene
This is a colorless transparent thermoplastic, water, light, chemical resistance, insulation, not resistant to high temperature, brittle, flammable. Glass transition temperature above 100 degrees Celsius is often used to produce disposable containers that require boiling water temperature and disposable foam lunch boxes.
3. PMMA polymethylmethacrylate
This kind of plastic, also known as transparent, easy to process, has good corrosion resistance. There are many colors, including mirror gold and silver. Its proportion is less than that of ordinary glass, and its anti fragmentation ability is very high, so it is widely used in the construction industry.
3、 Application of plastics
- 1. The shell of high-end electronic products is usually ABS + PC.
- 2. The display screen adopts PC, if PMMA is used, the surface hardening treatment is required.
- 3. Most of the electronic products used in daily life use ABS as the shell.