Physical Properties
- Specific Gravity: Tested per ASTM D792, the material’s specific gravity is 1.20 g/cc, indicating its density relative to water.
- Density: In line with ISO 1183, the density measures 1.20 g/cc (0.0434 lb/in³), reflecting consistent mass-to-volume properties.
- Water Absorption: At 23°C/saturated (ISO 62), the material absorbs 0.35%, showing moderate moisture uptake under fully saturated conditions.
- Moisture Absorption: Under 23°C/50% RH (ISO 62), the material exhibits a 0.150% moisture absorption rate, suitable for standard environmental conditions.
- Moisture Absorption at Equilibrium: Per ASTM D570, equilibrium moisture absorption is 0.35% at room temperature and 0.58% at 100°C (212°F).
- Linear Mold Shrinkage, Flow: With the SABIC method for 3.20 mm (0.126 in) thick samples, flow – direction shrinkage is 0.0050–0.0070 cm/cm (in/in).
- Melt Flow: ISO 1133 records 2.0 g/10 min (1.20 kg load) and 4.0 g/10 min (2.16 kg load) at 300°C; ASTM D1238 shows 2.5 g/10 min under a 1.20 kg load.
Polymer Properties:
- Base Material: Polycarbonate (PC)
- Modification Features:
- High viscosity and branched structure for high melt strength in blow molding.
- High impact resistance to withstand rough handling.
- Complies with FDA and European food contact regulations.
Applications:
Due to its unique combination of high heat resistance and optical clarity, LEXAN PK2870 PC is commonly used in:
- LED Lighting Components: Lenses, reflectors, and light guides for high-power LED applications where heat from the LED chip is a concern.
- Automotive Headlamp Lenses: The inner and outer lenses of automotive headlamps, which are exposed to heat from both the light source and the engine compartment.
- Optical Lenses: Lenses for projectors, cameras, and sensors that are located in high-temperature environments.
