PC-Sabic Lexan 141R
PC-Sabic Lexan 141R is an amorphous, non-halogenated polycarbonate resin engineered by SABIC, featuring an integrated internal mold release agent for clean, high-speed ejection. With a stable melt flow rate of 10.5 g/10 min and a density of 1.20 g/cm³, this grade is the global standard for high-transparency optical diffusers, automotive headlamp lenses, and durable electronic connectors. Jucheng Precision, under IATF 16949 and ISO 9001 frameworks, specializes in low-stress injection molding of Lexan 141R. Utilizing our five-axis CNC-machined conformal cooling toolings, we effectively prevent weld lines and eliminate residual thermal stresses, ensuring zero-defect components verified by Zeiss CMM inspection.
SABIC Lexan 141R Optical and Structural Performance
LEXAN™ 141R is an amorphous, non-halogenated polycarbonate resin engineered by SABIC, featuring an integrated mold release agent for optimized, high-yield manufacturing cycles:
| Physical & Optical Property | Lexan 141R Standard Metric | Precision Molding Advantage |
|---|---|---|
| Light Transmission | 88.0% Optical Transmission (2.54 mm) | Provides glass-like transparency directly from mirror-polished core cavities. Ideal for protective covers, light guides, and display lenses. |
| Impact Toughness | Notched Izod Impact 800 J/m | Delivers outstanding mechanical toughness, preventing structural fracturing or cracking under dynamic physical impact. |
| Thermal Softening | Vicat Softening Temperature 141°C | Maintains rigid structural geometry under elevated thermal stress. Suited for automotive headlamps and heavy-duty industrial housings. |
Molding Process Suitability for Easy-Release Lexan 141R
With a Melt Flow Rate of 10.5 g/10 min and built-in release additives, Lexan 141R flows smoothly and releases easily from complex tools:
| Molding Application | Process Compatibility & Setup Details |
|---|---|
| Optical & Clear Molding | Excellent. Fully optimized for high-transparency protective face shields, light guides, optical diffusers, and automotive outer lenses. |
| Precision Electrical Connectors | Excellent. The internal mold release agent ensures high-efficiency release of complex multi-pin connectors with high-density features. |
| Heavy-Duty Enclosure Molding | Excellent. Well-suited for heavy-duty industrial housings, protective meter covers, automotive engine brackets, and helmets. |
PC-Sabic Lexan 141R Tooling & Demolding Optimization Guide
While Lexan 141R contains an internal release agent, its high melt viscosity and amorphous nature require precise engineering parameters to prevent stresses and drag marks:
- Compensating for Amorphous Shrinkage: Polycarbonate has low, uniform shrinkage (typically 0.5% to 0.7%). Jucheng’s tooling division uses 5-axis CNC machines to mill precise mold cavities with conformal cooling loops, preventing uneven cooling and thermal warping.
- Rigorous Pre-Drying: PC is highly hygroscopic. Moisture levels must be kept strictly below 0.02% to prevent hydrolytic degradation, splay, and bubbles. We dry the raw resin in desiccant hopper dryers at 120°C (248°F) for 3–4 hours prior to molding.
- Melt and Mold Temperature Control: Processing barrel temperatures are maintained between 280°C and 320°C (536°F to 608°F). Mold temperatures are kept at 80°C to 120°C (176°F to 248°F) to ensure maximum gloss and reduce residual internal molding stresses.
- Optimizing Draft & Ejection: Because PC contracts tightly onto cores during cooling, deep-draw parts require draft angles of at least 1.5° to 2°. S136 stainless steel mold cavity blocks, mirror-polished, are used to prevent drag marks.
Key Application Fields for PC-Sabic Lexan 141R
- Automotive Lighting & Exteriors (IATF 16949): Automotive headlamp lenses, interior ambient light guides, rear light covers, sunroof frames, and side mirrors.
- Electrical & Smart-Grid Hardware: High-voltage connector blocks, electricity meter housings, transparent cover panels, switch boxes, and LED diffusers.
- Consumer & Safety Equipment: Safety helmets, protective goggles, face shields, clear food containers, and structural drone components.
Properties
| Density | 1.19 - 1.20 g/cm³ |
| Melt Mass-Flow Rate (MFR) (300°C/1.2kg) | 10.5 g/10 min |
| Tensile Strength at Yield | 62 MPa |
| Tensile Strength at Break | 68 MPa |
| Tensile Elongation at Break | 110 - 130 % |
| Flexural Strength at Yield | 96 MPa |
| Flexural Modulus | 2,340 MPa |
| Izod Notched Impact Strength (23°C) | 800 J/m |
| Light Transmission (2.54 mm) | 88 % |
| Rockwell Hardness (R-Scale) | 188 - |
| Vicat Softening Point (Rate B/50) | 141 °C |
| Heat Deflection Temperature (HDT @ 1.82 MPa) | 132 °C |
| Linear Mold Shrinkage | 0.50 - 0.70 % |
| Flammability Rating (1.6mm) | UL 94 HB - |
| Maximum Part Size | 1000 x 800 mm |
| Minimum Part Size | 1 x 1 mm |