Strong Characteristics Against Brittleness Virgin PBT Plastic
Dongguan Forever Co.,Ltd is the manufacture of the China origin cheap UV stablized PC polycarbonate Granules Polymer Resin
Unreinforced grades have abundant strength and flexibility, and have strong characteristics against brittleness. UL-certified slow-burning(94HB) and self-extinguishing grades(94V-0,V-2) exist, and electrical properties exhibited are the highest of any thermoplastic. Low water absorption is exhibited, and excellent electrical properties(CTI and GWIT) are retained over extended periods of usages, even with widely varied temperature and humidity conditions. The surface of molded products is smooth, and a low coefficient of friction is exhibited.As the amount of froction is low, PBT is suitable for use in application requiring friction and wear properties. The material is exceptionally reliable, with small in-use dimensional variation, and superior molding stability and dimensional precision.
General | |||||
Form |
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Feature | Low Friction Good Dimensional Good Surface Appearanc | Chemical Resistant High Elasticity Good Thermal |
Low Moisture | ||
Usage |
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Physical | Nominal Value | Test Method | |||
Density / Specific Gravity | 1.62 g/cm³ | ASTM D792 | |||
Molding Shrinkage, Flow | 0.40 - 0.60 % | ASTM D955 | |||
Water Absorption(24 hr;23 °C) | 0.050 % | ASTM D570 | |||
Mechanical | Nominal Value | Test Method | |||
Tensile Strength, Yield | 120 MPa | ASTM D638 | |||
Flexural Modulus | 10000 MPa | ASTM D790 | |||
Flexural Strength | 200 MPa | ASTM D790 | |||
Notched Izod Impact Strength | 12 kJ/m² | ASTM D256 | |||
Unnotched Izod Impact Strength | 70 kJ/m² | ASTM D256 | |||
Resin PelletsThermal | Nominal Value | Test Method |
Deflection Temperature Under Load, Unannealed 0.45 MPa 1.8 MPa | 220 °C 208 °C | ASTM D648 |
Flame Rating 0.8 mm 1.6 mm | V-0 V-0 | UL 94 |
Electrical | Nominal Value | Test Method |
Volume Resistivity(2 mm) | 1.3E+16 ohms ·cm | ASTM D257 |
Dielectric Strength(2 mm) | 20 kV/mm | ASTM D149 |
Dielectric Constant(50 Hz) | 3.20 | ASTM D150 |
Dissipation Factor(50 Hz) | 0.020 | ASTM D150 |
Processing | Nominal Value | |
Rear Temperature<Injection> | 225 - 250 °C | |
Middle Temperature<injection> | 225 - 250 °C | |
Front Temperature<Injection> | 225 - 250 °C | |
Nozzle Temperature<Injection> | 240 °C | |
Mold Temperature<Injection> | 60 - 80 °C | |
Injection Pressure<Injection> | 80.0 - 120 MPa | |
Back Pressure<Injection> | 8.00 - 18.0 MPa | |
Screw Speed <Injection> | < 100 rpm | |
Injection Time<Injection> | 3 - 15 sec | |
Time Pressure<Injection> | 2 - 5 sec | |
Total Cycle<Injection> | 15 - 50 sec |
