Sabic LEXAN™ PC Resin OQ3420
SABIC Lexan OQ3420 UV-stabilized
LEXAN™ OQ3420 resin is a 11 MFR polycarbonate. UV stabilized. Medium viscosity. Designed for ophthalmic lenses.
Associated Documents
TDS Americas
Typical property data
Physical Properties
- Specific Gravity: 1.2 (ASTM D792)
- Mold Shrinkage (flow, 3.2 mm): 0.5 – 0.7% (SABIC method)
- Melt Flow Rate (300°C/1.2 kgf): 10.5 g/10 min (ASTM D1238)
Mechanical Properties
- Tensile Stress, Yield: 62 MPa (ASTM D638)
- Tensile Stress, Break: 65 MPa (ASTM D638)
- Flexural Stress, Yield: 93 MPa (ASTM D790)
- Flexural Modulus: 2340 MPa (ASTM D790)
Impact Properties
Izod Impact, Notched (23°C): 747 J/m (ASTM D256)
Thermal Properties
- Vicat Softening Temperature (Rate B/50): 152°C (ASTM D1525)
- Heat Deflection Temperature (HDT), 0.45 MPa, Unannealed: 137°C (ASTM D648)
- Heat Deflection Temperature (HDT), 1.82 MPa, Unannealed: 132°C (ASTM D648)
Optical Properties
- Light Transmission (2.54 mm): 89% (ASTM D1003)
- Haze (2.54 mm): 1% (ASTM D1003)
- Refractive Index: 1.586 (ASTM D542)
Injection Molding
- Drying Temperature: 120°C
- Drying Time: 3 – 4 hours
- Cumulative Drying Time: 48 hours
- Maximum Moisture Content: 0.02%
- Melt Temperature: 295 – 315°C
- Nozzle Temperature: 290 – 310°C
- Mold Temperature: 70 – 95°C
- Back Pressure: 0.3 – 0.7 MPa
- Screw Speed: 40 – 70 rpm
- Shot to Cylinder Size: 40 – 60%
- Vent Depth: 0.025 – 0.076 mm
Features & Benefits
Superior Optical Clarity & Purity
With 89% light transmission and extremely low haze, LEXAN OQ3420 ensures crystal-clear vision for end-users, critical for ophthalmic lens applications.
Durability and Impact Resistance
Its high impact strength significantly reduces the risk of lens breakage during use and handling, enhancing product safety and longevity.
Excellent Thermal Stability
The high heat deflection temperature and consistent flow allow for stable, precise injection molding, resulting in reliable production of complex lens geometries.
