PC-Covestro Makrolon 2407
PC-Covestro Makrolon 2407 is a low-viscosity, UV-stabilized polycarbonate resin developed by Covestro, featuring an integrated easy mold release package for high-speed, automated production. Boasting a melt volume-flow rate (MVR) of 19 cm³/10 min (at 300°C/1.2kg) and outstanding structural toughness (notched Izod of 65 kJ/m²), this grade is optimized for thin-walled outdoor housings, transparent lenses, and electrical enclosures exposed to sunlight. Jucheng Precision, operating under IATF 16949 and ISO 9001 frameworks, specializes in molding Makrolon 2407 with zero cosmetic defects. Powered by 5-axis CNC-machined mirror S136 tool cavities, we prevent polymer degradation and eliminate weld lines, verified by Zeiss CMM inspection.
Makrolon 2407 Optical and UV Performance Profile
Makrolon® 2407 is a low-viscosity, UV-stabilized general purpose polycarbonate resin engineered by Covestro to deliver glass-like clarity, high impact strength, and weathering resistance:
| Performance Parameter | Makrolon 2407 Typical Value | Molding & Outdoor Use Advantage |
|---|---|---|
| UV Stabilization | Inherent Weather-Stable Package | Incorporates specialized UV absorbers, preventing long-term yellowing, embrittlement, and loss of clarity under direct sunlight exposure. |
| Low Melt Viscosity | MVR 19 cm³/10min (300°C x 1.2kg) | Ensures a highly fluid flow, allowing molten polymer to fill long and extremely thin-walled visual sections without flow marks. |
| Impact Toughness | Notched Izod Impact 65 kJ/m² | Delivers outstanding mechanical toughness and shatterproof safety, ideal for outdoor protective domes and lenses. |
Process Compatibility for Low-Viscosity Makrolon 2407
With a low-viscosity melt behavior, Makrolon 2407 flows smoothly to produce highly precise, glass-clear outer components:
| Molding Technology | Process Compatibility & Operational Details |
|---|---|
| Thin-Wall Outdoor Housings | Excellent. Fully optimized for high-transparency surveillance camera domes, thin-walled sensor covers, and outdoor light pipe conduits. |
| Clear Protective Shields | Excellent. Ideal for heavy-duty industrial control screens, safety shields, marine lighting covers, and agricultural machine visors. |
| Multi-Cavity Optical Lenses | Excellent. The easy mold release additives combined with low melt viscosity prevent part sticking and stress cracking in multi-cavity tool runs. |
PC-Covestro Makrolon 2407 Tooling & UV Cosmetic Integrity Guide
Molding an amorphous, low-viscosity resin like Makrolon 2407 requires tight parting-line clearances to prevent flashing, alongside highly uniform mold temperature profiles:
- Micro-Gap Flash Control (Tooling Precision): Because Makrolon 2407 has low viscosity, molten resin can seep easily into mold parting line gaps, causing unsightly flashing. Jucheng’s tooling division uses 5-axis CNC machines to achieve micro-tolerances, keeping mold parting clearances strictly within 0.01mm on premium S136 stainless steel mold cavity blocks.
- Desiccant Drying & Splay Prevention: Wet polycarbonate is highly susceptible to hydrolytic polymer chain fracture, destroying mechanical strength and causing splay or silver streaks. We dry raw resin in desiccant hopper dryers at 120°C (248°F) for 3–4 hours, keeping moisture strictly below 0.02%.
- Molding Temperature Controls: Processing barrel temperatures are maintained between 280°C and 320°C (536°F to 608°F). Mold temperatures are kept at 80°C to 110°C (176°F to 230°F) to ensure maximum gloss and reduce residual internal molding stresses.
- Low & Stable Shrinkage: Makrolon 2407 exhibits low and highly uniform shrinkage (0.5% to 0.7%). We machine balanced, conformal cooling circuits directly into core blocks to speed up heat dissipation, further reducing cycle times and preventing thermal warpage.
Key Application Fields for PC-Covestro Makrolon 2407
- Outdoor Lighting & Infrastructure: Transparent surveillance camera dome covers, solar panel housings, high-efficiency light pipes, marine signal covers, and streetlamp refractors.
- Electrical & Smart-Grid Hardware: High-voltage outdoor circuit breakers, transparent power meter covers, industrial switch boxes, and LED outdoor panel diffusers.
- Automotive & Public Infrastructure: High-impact safety face shields, tractor cabin window visors, outdoor charging dock screens, and structural public transit lenses.
Properties
| Density | 1.2 g/cm³ |
| Melt Volume-Flow Rate (MVR) (300°C/1.2kg) | 19 cm³/10min |
| Tensile Modulus | 2,400 MPa |
| Tensile Stress at Yield | 66 MPa |
| Nominal Tensile Strain at Break | >50 % |
| Tensile Strain at Break | 120 % |
| Flexural Strength | 98 MPa |
| Flexural Modulus | 2,350 MPa |
| Izod Notched Impact Strength (23°C, 3mm) | 65 kJ/m² |
| Glass Transition Temperature (Tg) | 143 °C |
| Vicat Softening Point (50N, 50°C/hr) | 144 °C |
| Heat Deflection Temperature (HDT @ 0.45 MPa) | 136 °C |
| Heat Deflection Temperature (HDT @ 1.80 MPa) | 124 °C |
| Linear Mold Shrinkage | 0.50 - 0.70 % |
| Flammability Rating (0.75mm) | UL 94 V-2 Class |
| Maximum Part Size | 800 x 600 mm |
| Minimum Part Size | 1 x 1 mm |