| About |
|---|
| KEPEX 3750GF is a glass fiber 50%-reinforced PBT/PET grade. It has superior mechanical, thermal, and electrical properties. It is suitable for automotive, electrical & electronics, and industrial parts requiring high stiffness and heat resistance.&& |
| Product Description | |
|---|---|
| Supplier | Korea Engineering |
| Generic | PBT+PET |
| Material Status | Commercial: Negative |
| Features | Good Rigidity,Good surface appearance,Good Electrical Properties,High Heat Resistance,HB |
| Availabilitys | North America,Asia Pacific,Europe |
| Process Methods | Injection Molding |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | 1.75 | g/cm³ | ISO 1183 |
| Shrinkage rate | |||
| MD：3.0 mm | 0.40 to 0.80 | % | Internal Method |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Charpy Notched Impact Strength | |||
| 23℃ | 10 | kJ/m² | ISO 179/1eA |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | |||
| 0.45 MPa, unannealed | 220 | ℃ | ISO 75-2/B |
| 1.8 MPa, unannealed | 210 | ℃ | ISO 75-2/A |
| Melting temperature | 220 to 250 | ℃ | ISO 11357-3 |
| Electrical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Volume resistivity | 1.0E+16 | ohms·cm | IEC 60093 |
| Dielectric strength | 22 | kV/mm | IEC 60243-1 |
| Dielectric constant | |||
| 60 Hz | 3.40 | ASTM D150 | |
| Dissipation factor | |||
| 60 Hz | 2.0E-3 | ASTM D150 |
| FLAME CHARACTERISTICS | Nominal value | Unit | Test method |
|---|---|---|---|
| 0.80 mm | HB | UL 94 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Rockwell hardness | |||
| R-level | 119 | ISO 2039-2 | |
| tensile strength | 155 | MPa | ISO 527-2 |
| Tensile strain | |||
| fracture | 1.0 | % | ISO 527-2 |
| Bending modulus | 16500 | MPa | ISO 178 |
| bending strength | 230 | MPa | ISO 178 |
| Process Conditions | |||
|---|---|---|---|
| injection | Nominal value | Unit | Test method |
| Drying temperature | 120 to 130 | °C | |
| Drying time | 3.0 to 5.0 | hr | |
| Recommended maximum moisture content | 0.050 | % | |
| Hopper temperature | 60 to 80 | °C | |
| Barrel rear temperature | 245 | °C | |
| Barrel middle temperature | 255 | °C | |
| Barrel front temperature | 265 | °C | |
| Nozzle temperature | 270 | °C | |
| Mold temperature | 70 to 90 | °C | |
| Back pressure | 0.490 to 0.981 | MPa | |
| Screw speed | 80 to 120 | rpm | |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. 10°C/min |
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