PBT BASF B4300G4
PBT BASF B4300G4
PBT BASF B4300G4 is a 20 % glass‑fiber‑reinforced engineering plastic. It features high rigidity, good flowability, excellent heat resistance and dimensional stability for wide‑range applications.
Main Applications
Automotive industry: door handles, micro‑motor housings, lamp frames (headlamp holders), brake‑drum controllers, bumpers, carburetor components, fenders, spoilers, spark‑plug terminal boards, instrument panels, automotive igniters.
Electrical & Electronics: relay housings, flyback transformer bobbins, connectors, switches, knobs, thermostat components.
Household appliances: iron bases, oven door handles, toaster housings & grills, cooling fans, hot‑air blowers.
Industrial parts: optical‑fiber cables, stiff brushes.
Food‑contact application: dedicated food‑contact grade (B 4300 G4 FC) available for relevant scenarios.
Physical‑Mechanical‑Thermal‑Electrical Properties
| Property Category | Property Item | Test Standard / Condition | Test Data / Range | Unit |
|---|---|---|---|---|
| Physical Properties | Density | ISO 1183 | 1.45 | g/cm³ |
| Glass‑fiber content | — | 20 | % | |
| Water absorption (23 ℃/24 h, saturated) | ISO 62 | 0.40 | % | |
| Equilibrium water absorption (23 ℃,50 %RH) | ISO 62 | 0.20 | % | |
| MVR (250 ℃/2.16 kg) | ISO 1133 | 14‑17 | cm³/10min | |
| Molding shrinkage (flow direction) | ISO 294‑4 | 0.3‑0.43 | % | |
| Molding shrinkage (transverse direction) | ISO 294‑4 | 1.1‑1.2 | % | |
| Mechanical Properties | Tensile strength | ISO 527‑2 | 93‑120 | MPa |
| Elongation at break | ISO 527‑2 | 2.0‑3.5 | % | |
| Tensile modulus | ISO 527‑2 | 7000‑7620 | MPa | |
| Flexural strength | ISO 178 | 130‑170 | MPa | |
| Charpy notched impact (23 ℃) | ISO 179/1eA | 5.3‑6.0 | kJ/m² | |
| Charpy un‑notched impact (23 ℃) | ISO 179/1eU | 58 | kJ/m² | |
| Ball indentation hardness | ISO 2039‑1 | 180 | MPa | |
| Thermal Properties | HDT @1.8 MPa | ISO 75‑2/A | 180‑205 | ℃ |
| HDT @0.45 MPa | ISO 75‑2/B | 220 | ℃ | |
| Melting point | ISO 11357‑3 | 220‑225 | ℃ | |
| CLTE | DIN 53752 | 3‑4×10⁻⁵ | /K | |
| Short‑term max service temperature | — | 210 | ℃ | |
| UL94 rating | UL94 | HB | class | |
| Electrical Properties | Volume resistivity | IEC 60093 | 10¹⁴‑10¹⁵ | Ω·cm |
| Surface resistivity | IEC 60093 | 10¹³ | Ω | |
| CTI | IEC 60112 | 300 | V | |
| Relative permittivity (100 Hz) | IEC 250 | 3.7 | — | |
| Dissipation factor (100 Hz) | IEC 250 | 0.0015 | — |
Injection‑Molding Parameters
| Process Stage | Parameter Item | Reference Range / Recommendation | Unit / Remarks |
|---|---|---|---|
| Pre‑treatment | Drying temperature | 100‑120 | ℃ |
| Drying time | 4.0 | h | |
| Target moisture content | ＜0.040 | % | |
| Drying equipment | Desiccant dryer recommended | — | |
| Injection Molding | Rear barrel temperature | 210‑240 | ℃ |
| Middle barrel temperature | 235‑250 | ℃ | |
| Front barrel temperature | 235‑250 | ℃ | |
| Nozzle temperature | Slightly lower than or equal to front zone | ℃ | |
| Melt temperature | 235‑260 | ℃ | |
| Mold temperature | 60‑100 / 65‑93 | ℃ | |
| Injection pressure | Adjust according to part structure & dimension | MPa | |
| Injection speed | Medium‑to‑high | — | |
| Back pressure | Set according to melt condition, generally low | MPa | |
| Screw speed | 28 (reference) | rpm | |
| Mold | Runner type | Round runner recommended | — |
| Gate type | All gate types are applicable | — | |
| Mold cooling | Well‑designed cooling channels for uniform & fast heat dissipation | — | |
| 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.
