PA plastic (nylon, polyamide), English name: Polyamide physical properties, specific gravity: PA6 1.14 grams / cubic centimeter, PA66 1.15 grams / cubic centimeter, PA1010 1.05 grams / cubic centimeter. Mold Shrinkage: PA6 0.8-2.5%, PA66 1.5-2.2% molding temperature :220-300 ℃ dry conditions :100-110 ℃ / 12 小时 tough, abrasion, oil, water forming properties of a crystalline material, melting point than the high, narrow melting temperature range, thermal stability, the material temperature over 300 degrees, stay longer than 30 minutes break. Moisture more easily, be dry, moisture content shall not exceed 0.3%. 
 2, good fluidity, easy to flash. Self-locking when the nozzle is preferred, and should be heated. 
 3, the molding shrinkage and shrinkage rate of large scope, clear direction, prone to shrinkage and deformation. 
 4, the wall thickness of plastic parts mold temperature at 90 degrees in the range of 20 to select the injection pressure by injecting machine type, material temperature, shape and size of plastic parts, die casting system selected, the wall thickness of plastic parts by molding cycle selected. Resin viscosity hour, injection, cooling should take a long time, and with white oil as a release agent. 
 5, mold gating system in the form and size, increasing the flow channel and the gate size can be reduced shrinkage. 
 The inadequacies of polyamide is: due to thermal expansion and water absorption can affect even the dimensional accuracy is not enough, poor acid resistance, hardness and elastic modulus is not enough. Improved after the plastic is relatively good one. 
 Application 
 1 for the manufacture of the fuel filter, fuel filter, tank, trap, oil tank, engine cylinder head covers, radiator tanks, balanced rotating shaft gear. Can also be used in the automotive electrical parts, terminal, etc. In addition, it can be used as drive and control components. 2, electrical and electronic industry: 
 Can be used to make rice cookers, electric vacuum cleaners, high-frequency electronic food heaters, electrical terminal products, such as switches and resistors. 3, medical equipment and precision instruments: 
 For medical blood transfusion, blood control, infusion, etc. PA monofilament surgical sutures do, wigs, etc.; In addition, the number of electronic typewriters rotating disk, terminal, transmission gears, belt filter presses and other films. 
 4, other aspects: the body for the production of disposable lighters, alkaline batteries liner, motorcycle driver's helmet, office machines shell, round the corner office chair, seat and backrest, skates, fishing line, etc., PA thin film gas excellent barrier properties and oil resistance, low temperature impact resistance, penetration, and can be used for meat, ham, and other frozen food packaging. Polyamide rods and plates can also be gear or other gear.