PBT SABIC DR48
PBT SABIC DR48
PBT SABIC DR48 is a well‑performing 15 % glass‑fiber‑reinforced, V‑0/5VA flame‑retardant engineering plastic. Its prominent advantages include good mechanical strength, excellent dimensional stability, extremely low moisture absorption, outstanding electrical insulation and superior flame‑retardant performance.
Main Applications
Electrical & Electronics (core application): lamp holders, connectors, switches, electrical housings & bases, coil bobbins, trimmers, motor housings, transformers, fuse housings, relays, energy‑saving lamps.
Automotive industry: interior instrument parts, connectors, relays, electronic ignition components, handles, lamp bases, lamp housings, reflector housings.
Household appliances: fan blades, small‑appliance housings, computer keyboards.
Industrial parts: textile‑machine components, optical‑fiber jackets.
Physical‑Mechanical‑Thermal‑Electrical Properties
| Property Category | Property Item | Test Standard / Condition | Test Data / Range | Unit |
|---|---|---|---|---|
| Physical Properties | Density | ISO 1183 / ASTM D792 | 1.50‑1.53 | g/cm³ |
| Glass‑fiber content | — | 15‑17 | % | |
| Water absorption (saturated, 23 °C) | ISO 62 | 0.17 | % | |
| Equilibrium water absorption (23 °C,50 %RH) | ISO 62 / ASTM D570 | 0.07 | % | |
| MVR (250 °C / 2.16 kg) | ISO 1133 | 8.0 | cm³/10 min | |
| MVR (250 °C / 5.0 kg) | ISO 1133 | 24.0 | cm³/10 min | |
| Molding shrinkage (flow direction) | Internal method | 0.4‑0.9 | % | |
| Molding shrinkage (transverse direction) | Internal method | 0.5‑1.1 | % | |
| Mechanical Properties | Tensile strength (break) | ISO 527‑2 / ASTM D638 | 93.1‑102 | MPa |
| Elongation at break | ISO 527‑2 | 3.0 | % | |
| Flexural strength (break) | ISO 178 / ASTM D790 | 145‑150 | MPa | |
| Flexural modulus | ISO 178 / ASTM D790 | 5030‑6300 | MPa | |
| Izod notched impact (23 °C) | ASTM D256 | 53 | J/m | |
| Charpy notched impact (23 °C) | ISO 179/1eA | 5.0 | kJ/m² | |
| Izod un‑notched impact (23 °C) | ASTM D4812 | 530 | J/m | |
| Rockwell hardness (R‑scale) | ASTM D785 / ISO 2039‑2 | 118‑120 | — | |
| Thermal Properties | HDT @1.8 MPa | ISO 75‑2/A / ASTM D648 | 170‑182 | ℃ |
| HDT @0.45 MPa | ISO 75‑2/B / ASTM D648 | 210 | ℃ | |
| Vicat softening temperature | ISO 306 | 200 | ℃ | |
| CLTE (flow direction) | ASTM E831 / ISO 11359‑2 | 2.0‑3.5×10⁻⁵ | cm/cm/℃ | |
| UL RTI (electrical / impact) | UL 746 | 120 | ℃ | |
| UL RTI (no impact) | UL 746 | 140 | ℃ | |
| UL94 (0.89 mm) | UL94 | V‑0 | class | |
| UL94 (3.0 mm) | UL94 | 5VA | class | |
| Electrical Properties | Volume resistivity | ASTM D257 / IEC 60093 | 10¹⁵‑3.6×10¹⁶ | Ω·cm |
| Dielectric strength (3.2 mm, in air) | ASTM D149 | 19 | kV/mm | |
| Relative permittivity (100 Hz / 1 MHz) | ASTM D150 | 3.2‑3.6 / 3.1‑3.4 | — | |
| Dissipation factor (100 Hz / 1 MHz) | ASTM D150 | 0.001‑0.002 / 0.012‑0.020 | — | |
| Arc resistance | ASTM D495 | PLC 6 | — | |
| CTI | UL 746 | PLC 3 | — |
Injection‑Molding Parameters
| Process Stage | Parameter Item | Reference Range / Recommendation | Unit / Remarks |
|---|---|---|---|
| Pre‑treatment | Drying temperature | 110‑121 | ℃ |
| Drying time | Min.2.0‑4.0 h; max 12 h | h | |
| Target moisture content | ≤0.02 | % | |
| Drying equipment | Desiccant dryer recommended | — | |
| Injection Molding | Rear barrel temperature | 230‑254 | ℃ |
| Middle barrel temperature | 240‑260 | ℃ | |
| Front barrel temperature | 245‑266 | ℃ | |
| Nozzle temperature | 240‑260 | ℃ | |
| Melt temperature | 249‑270 | ℃ | |
| Mold temperature | 40‑100 ℃; preferred:65.6‑87.8 ℃ | ℃ | |
| Injection pressure | 50‑100 | MPa | |
| Injection speed | Relatively fast (PBT fast‑cooling characteristic) | — | |
| Back pressure | 0.345‑0.689 | MPa | |
| Screw speed | 50‑80; do not exceed 80 rpm | rpm | |
| Vent depth | 0.025‑0.038 | mm | |
| Suggested shot size | 40‑80 | % | |
| Mold | Runner type | Round runner recommended | — |
| Gate type | Hot‑runner system NOT recommended | — | |
| Mold cooling | Uniform temperature across mold cavity | — | |
| Post‑processing | Cycle time | 15‑60 | s |
| Annealing (if required) | Reduce residual stress, improve dimensional stability | ℃ | |
| Annealing time | Adjust according to wall thickness | h |
Note: All data above is for reference only.
