What is aS plastic?
The scientific name of aS resin is acrylonitrile-styrene copolymer. A polymer compound obtained by copolymerizing acrylonitrile and styrene. It generally contains 15%-50% styrene. A solid, yellowish to amber needle solid. The density is 1.06. There is thermoplasticity. Not easy to change color. Not affected by dilute acid, dilute alkali, dilute alcohol and gasoline. However, it is soluble in acetone, ethyl acetate, dichloroethylene or the like. Can be used as engineering plastics. It has excellent heat resistance and solvent resistance. Used for making oil resistant mechanical parts, instrument cases, instrument panels, battery boxes, tractor fuel tanks, battery casings, packaging containers, daily necessities, etc. Can also be drawn into a monofilament. But mainly used as a blend for the production of aBS resin.
aS plastic injection molding process
1. The processing temperature of aS is generally 200-250 ° C. The material is easy to absorb moisture, and it needs to be dried for more than one hour before processing. Its fluidity is slightly worse than PS, so the injection pressure is slightly higher. Drying treatment aS has some hygroscopic properties if not properly stored. Recommended drying conditions are 80 ° C, 2-4 hours
2. The melting temperature is 200-270 °C. If processing thick-walled products, lower melting temperatures below the lower limit can be used
3. Injection pressure 350-1300 bar Injection speed is recommended to use high speed injection
4. The mold temperature is 40-80 °C. For reinforced materials, the mold temperature should not exceed 60 °C. The cooling system must be well designed because the mold temperature will directly affect the appearance, shrinkage and bending of the product.
5. Runners and gates All conventional gates can be used. The gate size must be appropriate to avoid streaks, freckles and voids
Application field
1. Automotive field: mechanical parts, fuel tanks, lamp covers, instrument lenses, various switch buttons, etc.
2. Home appliance field: TV sets, recorder knobs and rulers, telephones and other household appliances parts, air conditioners, camera parts, fan blades
3. Commodity field: tableware, food knives, cosmetics packaging, lighter shell
4. Industrial field: socket, housing, battery casing, battery box, pool box, junction box
