PBT SABIC 420SEO
PBT SABIC 420SEO
PBT SABIC 420SEO is an outstanding 30 % glass‑fiber‑reinforced, flame‑retardant engineering plastic. Featuring high rigidity, high strength, excellent heat resistance, good electrical insulation and flame retardancy, it is applied in multiple demanding fields.
Main Applications
Electrical & Electronics (core application): connectors, switches, relay housings, coil bobbins, transformer bobbins, adapter bobbins, printed‑circuit boards, computer keyboards.
Automotive industry: cooling fans, motor stators & commutators, automotive ignition coil tubes, various electrical connectors, head‑lamp bezels, front windshield wipers, door‑lock housings, power‑window regulator motors, ECU housings.
Household appliances: iron covers, oven parts, rice‑cooker liners, induction‑cooker panels, electric‑kettle housings, washing‑machine heater housings.
Industrial parts: fitness‑equipment components, mechanical‑device parts (e.g. VTR drive shafts), computer enclosures, lamp housings, gears, cams, push‑buttons.
Other fields: LED heat sinks, motor parts for trimmers, food blenders and other equipment.
Physical‑Mechanical‑Thermal‑Electrical Properties
| Property Category | Property Item | Test Standard / Condition | Test Data / Range | Unit |
|---|---|---|---|---|
| Physical Properties | Density | ASTM D792 | 1.58‑1.63 | g/cm³ |
| Glass‑fiber content | — | 30 | % | |
| Saturated water absorption (23 ℃) | ISO 62 | 0.09 | % | |
| Equilibrium water absorption (23 ℃,50 %RH) | ISO 62 | 0.07 | % | |
| MFR (250 °C / 5.0 kg) | ASTM D1238 | 42 | g/10 min | |
| Molding shrinkage (flow,＜3.2 mm) | Internal Method | 0.10‑0.50 | % | |
| Molding shrinkage (flow,3.2 mm) | Internal Method | 0.50‑0.70 | % | |
| Molding shrinkage (transverse,＜3.2 mm) | Internal Method | 0.40‑0.80 | % | |
| Molding shrinkage (transverse,3.2 mm) | Internal Method | 0.50‑1.0 | % | |
| Mechanical Properties | Tensile modulus | ASTM D638 | 12000 | MPa |
| Tensile modulus | ISO 527‑2 | 10000 | MPa | |
| Tensile strength (yield) | ASTM D638 | 120 | MPa | |
| Tensile stress (yield) | ISO 527‑2 | 120 | MPa | |
| Elongation at break | ASTM D638 | 2.0 | % | |
| Flexural modulus | ASTM D790 | 9800 | MPa | |
| Flexural modulus | ISO 178 | 9500 | MPa | |
| Flexural strength (break) | ASTM D790 | 186 | MPa | |
| Flexural stress | ISO 178 | 180 | MPa | |
| Izod notched impact (23 ℃) | ASTM D256 | 60 | J/m | |
| Charpy notched impact (23 ℃) | ISO 179/1eA | 7.0 | kJ/m² | |
| Rockwell hardness (R‑scale) | ASTM D785 | 119 | — | |
| Thermal Properties | HDT @1.8 MPa | ASTM D648 | 200 | ℃ |
| HDT @1.8 MPa | ISO 75‑2/A | 195‑200 | ℃ | |
| HDT @0.45 MPa | ASTM D648 | 212 | ℃ | |
| HDT @0.45 MPa | ISO 75‑2/B | 220 | ℃ | |
| Melting point | — | 225 | ℃ | |
| Vicat softening temperature | ISO 306/B50 | 200 | ℃ | |
| CLTE (flow direction) | ASTM E831 | 2.5×10⁻⁵ | cm/cm/℃ | |
| CLTE (transverse direction) | ASTM E831 | 8.9×10⁻⁵ | cm/cm/℃ | |
| UL94 (0.71 mm) | UL94 | V‑0 | class | |
| UL94 (2.0 mm) | UL94 | 5VA | class | |
| Electrical Properties | Volume resistivity | ASTM D257 | ＞1.0×10¹⁵ | Ω·cm |
| Surface resistivity | IEC 60093 | ＞1.0×10¹⁵ | Ω | |
| Dielectric strength (in air,3.2 mm) | ASTM D149 | 19 | kV/mm | |
| Relative permittivity (100 Hz) | ASTM D150 | 3.80 | — | |
| Relative permittivity (1 MHz) | ASTM D150 | 3.70 | — | |
| Dissipation factor (100 Hz) | ASTM D150 | 0.0020 | — | |
| Dissipation factor (1 MHz) | ASTM D150 | 0.0200 | — | |
| 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 | 105‑140 | ℃ |
| Drying time | 6 h@105 ℃; 4 h@120 ℃; 2 h@140 ℃ (bed thickness＜30 mm) | h | |
| Target moisture content | ＜0.02 | % | |
| Drying equipment | Desiccant dryer recommended | — | |
| Injection Molding | Rear barrel temperature | 220‑240 | ℃ |
| Middle barrel temperature | 230‑250 | ℃ | |
| Front barrel temperature | 240‑260 | ℃ | |
| Nozzle temperature | Slightly lower than or equal to front zone | ℃ | |
| Melt temperature | 240‑260; do NOT exceed 280 ℃ (decomposition) | ℃ | |
| Mold temperature | 70‑80 ℃; ΔT ≤10 ℃ | ℃ | |
| Injection pressure | 50‑100 | MPa | |
| Injection speed | Relatively fast (PBT fast‑cooling characteristic) | — | |
| Back pressure | 10‑15 % of injection pressure | MPa | |
| Screw speed | 25‑60; max ≤80 | rpm | |
| Cycle time | 15‑60 | s | |
| Mold | Runner type | Round runner recommended | — |
| Gate type | All gate types available; large gate size required | — | |
| Mold cooling | Uniform temperature, ΔT ≤10 ℃, max mold temp ≤100 ℃ | — | |
| Venting | Vents / vent slots are required | — | |
| Mold material | Chrome‑plated mold surface recommended for anti‑corrosion for FR‑PBT | — | |
| Post‑processing | 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.
