PBT Nantong Zhonglan G20
PBT Nantong Zhonglan G20
PBT Nantong Zhonglan G20 is a 20 % glass‑fiber‑reinforced PBT resin with UL94 V‑0 flame retardancy. Benefiting from good mechanical strength, heat resistance, dimensional stability and flame‑retardant performance, it is widely adopted in multiple fields.
Main Applications
Electrical & Electronics (core application): computer connectors, coil bobbins, relays, capacitor housings, home‑appliance parts, communication‑device components, instrument and mechanical parts.
Automotive industry: manufacturing of automotive components (general PBT application reference).
Household appliances: various home‑appliance components and housings.
Industrial parts: instrument‑meter components and mechanical parts.
Physical‑Mechanical‑Thermal‑Electrical Properties
| Property Category | Property Item | Test Standard / Condition | Test Data / Range | Unit |
|---|---|---|---|---|
| Physical Properties | Density | ASTM D‑792,23 ℃ | 1.54 | g/cm³ |
| Glass‑fiber content | — | 20 | % | |
| Water absorption (23 ℃,24 h) | ASTM D‑570 | 0.05 | % | |
| Molding shrinkage | ASTM D‑955 | 0.4‑1.3 | % | |
| Mechanical Properties | Tensile strength | ASTM D‑638 | 105 | MPa |
| Flexural strength | ASTM D‑790 | 168 | MPa | |
| Charpy un‑notched impact | ISO 179 | 34 | kJ/m² | |
| Charpy notched impact | ISO 179 | 9 | kJ/m² | |
| Thermal Properties | HDT @1.82 MPa | ASTM D‑648 | 203 | ℃ |
| HDT @0.46 MPa | ASTM D‑648 | 212 | ℃ | |
| UL94 rating (0.8/1.6 mm) | UL94 | V‑0 | class | |
| Electrical Properties | Volume resistivity | ASTM D‑257 | 1.2×10¹⁴ | Ω·cm |
| Dielectric strength (2 mm) | ASTM D‑149 | 22 | MV/m | |
| Relative permittivity (1 MHz) | ASTM D‑150 | 3.1 | — | |
| Dissipation factor (1 MHz) | ASTM D‑150 | 0.02 | — |
Injection‑Molding Parameters
| Process Stage | Parameter Item | Reference Range / Recommendation | Unit / Remarks |
|---|---|---|---|
| Pre‑treatment | Drying temperature | 120‑150 | ℃ |
| Drying time | 6‑8 h@120 ℃; 2‑4 h@150 ℃ | h | |
| Target moisture content | ＜0.03 | % | |
| Drying equipment | Desiccant dryer recommended | — | |
| Injection Molding | Barrel temperature | 225‑250 | ℃ |
| Nozzle temperature | 240 | ℃ | |
| Melt temperature | 225‑250; practical production reference:235‑260 | ℃ | |
| Mold temperature | 60‑80 | ℃ | |
| Injection pressure | 60‑120 | MPa | |
| Injection speed | As fast as possible (PBT fast‑solidification characteristic) | — | |
| Back pressure | 6‑18 | MPa | |
| Screw speed | ≤100 | 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 | — | |
| Cycle Time | Injection time | 3‑15 | s |
| Holding time | 2‑5 | s | |
| Total cycle | 15‑50 | s | |
| 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.
