PC Teijin (Japan) LN‑1250G
PC Teijin (Japan) LN‑1250G
Material Introduction: PC Teijin (Japan) LN‑1250G is a flame‑retardant polycarbonate resin. It delivers excellent flame retardancy (UL94 V‑0 rating), good heat resistance, superior electrical insulation and desirable mechanical strength. It is mainly designed for injection‑molding process and widely applied in electronics & electrical industry.
Main Applications
- Electronic & Electrical Components: Core application of LN‑1250G. Thanks to its outstanding flame retardancy (UL94 V‑0), it is commonly used for electrical & electronic parts requiring UL94 V‑0 rating, such as switches, relay housings, wire terminals, sockets, etc.
- Business‑Machine Components: Internal structural parts and housings for office equipment including printers, copiers and scanners.
- Automotive Industry: Although not listed as a direct application for LN‑1250G, Teijin PC grades are available for automotive‑sector applications.
- Other Industrial Parts: Various industrial components requiring flame retardancy and favorable mechanical performance.
Physical & Mechanical Properties
| Property Category | Performance Parameter | Test Standard | Value / Range | Unit |
|---|---|---|---|---|
| Physical Properties | Density | ISO 1183 | 1.20‑1.22 | g/cm³ |
| Water Absorption (23°C, 24hr) | ISO 62 | 0.20 | % | |
| Melt Volume‑Flow Rate (MVR) | ISO 1133 (300°C / 1.2 kg) | 8.0‑13.2 | cm³/10min | |
| Molding Shrinkage (Flow / Transverse Direction) | Internal Method | 0.5‑0.7 | % (4 mm thickness) | |
| Light Transmittance (3 mm thickness) | ASTM D1003 | Translucent | % | |
| Mechanical Properties | Tensile Modulus | ISO 527‑2 | 2400 | MPa |
| Tensile Yield Stress | ISO 527‑2 | 62.0 | MPa | |
| Tensile Yield Elongation | ISO 527‑2 | 6.0 | % | |
| Nominal Tensile Elongation at Break | ISO 527‑2 | ＞50 | % | |
| Flexural Strength | ISO 178 | 90.0 | MPa | |
| Flexural Modulus | ISO 178 | 2200‑2350 | MPa | |
| Compressive Strength | ASTM D‑695 | 78 | MPa | |
| Izod Notched Impact Strength | ISO 179 | 12 | kJ/m² | |
| Izod Un‑notched Impact Strength | ISO 179 | No Break (NB) | ‑ | |
| Thermal Properties | Heat‑Distortion Temperature (1.8 MPa) | ISO 75‑2/A | 129 | °C |
| Heat‑Distortion Temperature (0.45 MPa) | ISO 75‑2/B | 141 | °C | |
| Vicat Softening Temperature | ISO 306/B50 | 148 | °C | |
| Coefficient of Linear Thermal Expansion (Flow Direction) | ISO 11359‑2 | 7.0E‑5 | cm/cm/°C | |
| Coefficient of Linear Thermal Expansion (Transverse Direction) | ISO 11359‑2 | 7.0E‑5 | cm/cm/°C | |
| Relative Temperature Index (RTI Elec) | UL 746 | 125 (1.5 mm) | °C | |
| Electrical Properties | Volume Resistivity | IEC 60093 | ＞1.0E+13 | Ω·cm |
| Surface Resistivity | IEC 60093 | ＞1.0E+15 | Ω | |
| Dielectric Strength | IEC 60243‑1 | 30 | kV/mm | |
| Relative Permittivity (100 Hz) | IEC 60250 | 3.10 | ‑ | |
| Dissipation Factor (100 Hz) | IEC 60250 | 0.001 | ‑ | |
| Arc Resistance | IEC 60112 | 275 | ‑ | |
| Flame Retardant Performance | UL94 Rating (1.0 mm) | UL94 | V‑0 | ‑ |
Injection Molding Processing Parameters
| Processing Stage | Process Parameter | Suggested Value / Range | Unit | Remarks |
|---|---|---|---|---|
| Pre‑drying | Drying Temperature | 110‑120 | °C | ‑ |
| Drying Time | 4‑6 | h | ‑ | |
| Recommended Dew Point | ＜‑40 | °C | ‑ | |
| Allowable Moisture Content | ＜0.02 | % | ‑ | |
| Injection Temperature | Rear Barrel Temperature | 260‑280 | °C | ‑ |
| Middle Barrel Temperature | 280‑300 | °C | ‑ | |
| Front Barrel Temperature | 290‑310 | °C | ‑ | |
| Nozzle Temperature | 280‑300 | °C | ‑ | |
| Mold Temperature | 80‑100 | °C | ‑ | |
| Injection Pressure & Speed | Injection Pressure | To be adjusted according to specific product and mold | MPa | ‑ |
| Holding Pressure | 50%‑80% of injection pressure | MPa | ‑ | |
| Injection Speed | Medium | ‑ | ‑ | |
| Other Parameters | Screw Speed | Medium (40‑70 recommended) | rpm | ‑ |
| Back Pressure | Moderate (0.3‑0.6 recommended) | MPa | ‑ |
Disclaimer: All above data is for reference only.
