PC Covestro 2807
PC Covestro 2807
Material Introduction: PC Covestro 2807 is a medium‑viscosity general‑purpose polycarbonate material widely used in multiple industries. It is well‑recognized for favorable impact resistance, high transparency, good mold‑release performance and UV‑stabilized property. It also features high toughness, good heat resistance, high dimensional accuracy & stability and excellent electrical insulation performance.
Main Applications
- Electronic & Electrical Components: Household‑appliance housings, switches, sockets, wiring boards, capacitors, telephone housings, telephone exchangers, signal relays and other parts.
- Automotive Industry: Lamp housings, interior trim parts, instrument panels, etc.
- Industrial Equipment & Parts: Protective covers, frames, gears, bearings, safety helmets for mechanical equipment.
- Consumer Goods & General‑Purpose Parts: Toys, models, tableware, LED lamp housings and so on.
- Optical Lighting: Large‑size lamp housings, protective glazings.
Key Characteristics
| Characteristic Category | Description | Reference Data (Test Standard) |
|---|---|---|
| Physical Properties | Medium‑viscosity, easy‑release, UV‑stabilized | MVR: 9.0 cm³/10min (300°C/1.2kg, ISO 1133) Density: 1.20 g/cm³ |
| Mechanical Properties | High impact resistance, high rigidity | Notched Impact Strength: 65‑85 kJ/m² Flexural Modulus: 2350 MPa |
| Thermal Properties | Good heat resistance | HDT (1.8 MPa): 125‑130°C (alternative source: 135°C) Vicat Softening Temperature: 145°C |
| Optical Properties | High transparency | Light Transmittance: 88‑89% |
| Safety Properties | Flame retardancy | UL 94: HB (1.5 mm), V‑2 (0.75 mm, to be verified) |
| Processing Properties | Injection‑molding grade; sufficient pre‑drying required to prevent hydrolytic degradation | Recommended moisture content ＜0.02% |
Injection Molding Processing Parameters
| Processing Stage | Parameter Item | Suggested Range / Operation Notes | Unit / Remarks |
|---|---|---|---|
| Pre‑drying | Drying Temperature | 110‑120 | °C |
| Drying Time | More than 4 hours (extend to 8‑10 hours as required) | h | |
| Allowable Moisture Content | ＜ 0.02% | Critical requirement | |
| Injection Temperature | Rear Barrel Temperature | 210‑240 (or 250‑260) | °C (adjust according to equipment and product structure) |
| Middle Barrel Temperature | 230‑280 (or 270‑280) | °C | |
| Front Barrel Temperature | 240‑285 (or 280‑290) | °C | |
| Nozzle Temperature | 240‑250 (or 270‑300) | °C | |
| Melt Temperature | 270‑320 (do not exceed 320°C) | °C (actual melt temperature shall be confirmed by air‑shot test) | |
| Mold Temperature | 80‑100 (or 50‑80) | °C (higher mold temperature reduces internal stress, improves filling and surface appearance) | |
| Injection Settings | Injection Pressure | 80‑130 (adjust according to product and mold design) | MPa |
| Holding Pressure | 40%‑60% of injection pressure | MPa (general PC recommendation) | |
| Back Pressure | Approx.10 bar (≈1 MPa; may decrease without silver streaks or color‑mixing defects) | MPa/bar | |
| Screw Speed | 40‑70 (or 28) | rpm | |
| Others | Injection Speed | Relatively fast injection speed commonly adopted (e.g. electrical switch parts); slow‑to‑fast injection profile is typical | ‑ |
Disclaimer: All above data is for reference only.
