Long-term stock PBT / Taiwan's Nanya / 1403G6 reinforced grade, flame retardant

PBT Processing: PBT thermoplastic polyester can be referred to as plastic, to apply to different processing industries to use, how much will the general additive or blended with other plastics, as additives in different proportions, can produce different specifications. PBT has the heat resistance, weather resistance, and chemical resistance, good electrical properties, low water absorption, good luster, widely used in electronic appliances, auto parts, bodies, household goods, etc., and PBT products, but also with the PPS, PC, POM , PA and so were called the five generic engineering plastics. PBT crystallization speed, the most suitable processing method for injection molding, as well as other methods of extrusion, blow molding, coating, and various secondary processing molding, molding required before pre-drying, moisture content should be reduced to 0.02%. PBT, injection molding process characteristics and process parameters: PBT polymerization process maturity, low cost, easy molding. Poor performance of unmodified PBT, the practical application of the PBT should be modified, of which, more than glass fiber reinforced PBT grades modified accounted for 70%. Technological properties of PBT: PBT has a sharp melting point, melting point of 225 ~ 235 ℃, is a crystalline material, crystallinity up to 40%. PBT melt viscosity is affected by temperature as big as shear stress, therefore, in injection molding, injection of liquidity injection pressure of PBT melt influence is obvious. PBT in the molten state, good fluidity, low viscosity, second only to nylon, in the shape prone to "tape" phenomenon. PBT molding products anisotropy. PBT easily degradable water at high temperatures. Typical Applications: household appliances (food processing blades, vacuum cleaners components, electric fan, hair dryer shell, coffee containers, etc.), electrical components (switches, motor shell, fuse boxes, computer keyboard keys points, etc.), car Industrial (radiator grilles, body panels, tires, windows components, etc.). Product parameters Performance Project test conditions [state] method of test data units Basic performance mold shrinkage 0.2-1.2%, the proportion of the physical properties of ASTM D-792 1.59 Mechanical properties of notched impact strength ASTM D-256 8.5 kg / cm2 dielectric breakdown strength ASTM D -149 23 Kv / mm bending elastic modulus ASTM D-790 80000 kg / cm2 tensile yield strength ASTM D-638 1300 kg / cm2 electrical properties of anti-arc ASTM D-495 85 SEc Thermal heat distortion temperature ASTM D-648 210 ℃ molding processing considerations [PBT] Injection molding conditions Drying: This material is easily hydrolyzed at a high temperature, and therefore dried before processing is very important. Recommended air drying conditions for 120C, 6 ~ 8 hours, or 150C, 2 ~ 4 hours. Humidity must be less than 0.03%. If moisture dryer, recommended conditions of 150C, 2.5 小时 melting temperature: 225 ~ 275C, recommended temperature: 250C. Mold temperature: For unreinforced material is 40 ~ 60C. To well designed mold cooling cavity to reduce the bending of plastic parts. Heat loss must be fast and uniform. Recommend mold cooling cavity diameter of 12mm. Injection pressure: Medium (up to 1500bar). 1 bar (bar) = 100 kPa (KPa) = 10 N / cm = 0.1MPa 1N / m2 = 1Pa 1kg = 9.8N 1m2 = 10000cm2 so 1kg / cm2 = 98KPa = 0.098MPa, the engineering people to take approximately 1MPa = 10kg / cm2 Injection speed: should use the fastest possible injection speed (because of fast solidification of PBT). Runners and Gates: It is recommended to use a circular flow channel to increase the pressure of the transfer (empirical formula: runner diameter = thickness of plastic parts