Jiangsu Kingsder New Material Technology Co., Ltd. is one of the leading manufacturers and suppliers of general purpose pbt resin in China. We are committed to providing high quality and UL recognized plastic raw materials to global clients. If you're going to wholesale cheap general purpose pbt resin, welcome to get quotation and free sample from our factory. We also accept customized orders.
Description
Every material range has a workhorse-the grade you reach for when the part is ordinary and the price matters. General Purpose PBT sits exactly there. It doesn't chase a single specialty like UV stability or flame retardancy; instead it gives you a balanced package of stiffness, electrical insulation, dimensional stability, and heat resistance at a price that suits volume runs. That makes it the default choice for connectors, coil bobbins, relays, switches, and the mass of small electrical and appliance parts where nothing exotic is asked for.
The numbers describe a capable, unpretentious material. Unreinforced PBT melts around 225°C and keeps useful mechanicals well into regular service; its rigidity, low creep, and stable dimensions hold tolerances on molded parts, while its dielectric strength handles insulation duties in electrical housings. The trade-off is honest: it's not as stiff or heat-resistant as a glass-filled version, and not as flame-retardant as a V-0 grade. What it offers is a cost-effective middle ground-enough performance for everyday components, without paying for features the part will never use.
Sourcing is the same story. The grade is available from imported producers such as SABIC and Covestro and from domestic mills like Wanhua, Daphoon, and Lihuayi. We supply a specified brand and batch to match your existing approval. Because this is a commodity-level material, lead time and pricing tend to be favorable, and it's easy to scale from a trial run to full container volumes.
Even a general grade asks for one discipline on the machine: PBT is moisture-sensitive and can hydrolyze at melt temperature, so dry the pellets-roughly 110 to 130°C for a few hours-and keep moisture low throughout. Barrel temperature and residence time stay controlled to avoid degradation, and a mold temperature near 60 to 80°C helps the surface and dimensional stability. The window is forgiving, which is exactly why this grade is easy to run. General Purpose PBT Resin on standard equipment gives consistent parts run after run, with none of the extra care that filled or flame-retardant versions demand.
Product Specifications
| Property | Typical Value | Unit | Test Method |
| Tensile Stress, yld, Type I, 50 mm/min | 51 | MPa | ASTM D638 |
| Tensile Strain, brk, Type I, 50 mm/min | 300 | % | ASTM D638 |
| Flexural Modulus, 1.3 mm/min, 50 mm span | 2340 | MPa | ASTM D790 |
| Flexural Stress, yld, 1.3 mm/min, 50 mm span | 82 | MPa | ASTM D790 |
| Hardness, Rockwell R | 117 | - | ASTM D785 |
| Izod Impact, notched, 23°C | 53 | J/m | ASTM D256 |
| Izod Impact, unnotched, 23°C | 1602 | J/m | ASTM D4812 |
| HDT, 0.45 MPa, 6.4 mm, unannealed | 154 | °C | ASTM D648 |
| HDT, 1.82 MPa, 6.4 mm, unannealed | 54 | °C | ASTM D648 |
| Relative Temp Index, Mech w/o impact | 140 | °C | UL 746B |
| Specific Gravity | 1.31 | - | ASTM D792 |
| Water Absorption (23°C/24hrs) | 0.08 | % | ASTM D570 |
| Mold Shrinkage, flow, 0.75-2.3 mm | 0.9 – 1.6 | % | SABIC method |
| Melt Viscosity | 600 | Pa-s | SABIC method |
| Volume Resistivity | >4E+16 | Ω.cm | ASTM D257 |
| Dielectric Strength, in air, 3.2 mm | 15.7 | kV/mm | ASTM D149 |
| Comparative Tracking Index {PLC} | 0 | PLC Code | UL 746A |
| UL Recognized, 94HB Flame Class Rating | 1.47 | mm | UL 94 |
| *Take SABIC 310 as an example | |||
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