Sabic LEXAN™ PC Resin 191
Plastic Granules
SABIC PC Lexan 191 General Purpose Grade
LEXAN™ Resin 191 is a durable, high-performance 9 MFR polycarbonate. It offers an excellent balance of impact strength, heat resistance, and improved chemical resistance, all while meeting the UL94 HB safety standard. It is an ideal, reliable material for robust opaque components.
Associated Documents
TDS Americas
Typical property data
Physical Properties
- Specific Gravity: 1.19 (ASTM D792)
- Specific Volume: 0.84 cm³/g (ASTM D792)
- Water Absorption, 23°C/24hrs: 0.19% (ASTM D570)
- Water Absorption, 23°C/Saturated: 0.37% (ASTM D570)
- Water Absorption, Equilibrium, 100°C: 0.54% (ASTM D570)
- Melt Flow Rate, 300°C/1.2 kg: 8.5 g/10 min (ASTM D1238)
- Mold Shrinkage (Flow, 3.2 mm): 0.5–0.7% (SABIC Method)
Mechanical Properties
- Tensile Stress, Yield: 58 MPa (ASTM D638)
- Tensile Stress, Break: 63 MPa (ASTM D638)
- Tensile Strain, Yield: 7% (ASTM D638)
- Tensile Strain, Break: 115% (ASTM D638)
- Flexural Stress, Yield: 81 MPa (ASTM D790)
- Flexural Modulus: 2130 MPa (ASTM D790)
- Rockwell Hardness (R): 118 (ASTM D785)
- Rockwell Hardness (M): 68 (ASTM D785)
- Taber Abrasion (CS-17, 1 kg): 20 mg/1000 cycles (ASTM D1044)
Impact Properties
- Izod Impact, Notched, 23°C: 747 J/m (ASTM D256)
- Izod Impact, Unnotched, 23°C: 3204 J/m (ASTM D4812)
- Tensile Impact Strength (Type S): 420 kJ/m² (ASTM D1822)
- Falling Dart Impact, 23°C: 169 J (ASTM D3029)
Thermal Properties
- HDT, 0.45 MPa, 6.4 mm, Unannealed: 137°C (ASTM D648)
- HDT, 1.82 MPa, 6.4 mm, Unannealed: 126°C (ASTM D648)
- CTE, -40°C to 95°C, Flow: 6.48E-05, 1/°C (ASTM E831)
- Relative Temperature Index (Elec): 100°C (UL 746B)
- Relative Temperature Index (Mech w/impact): 100°C (UL 746B)
- Relative Temperature Index (Mech w/o impact): 100°C (UL 746B)
Electrical Properties
- Volume Resistivity: 2.5E+17 (ASTM D257)
- Dielectric Strength (3.2 mm): 16.3 kV/mm (ASTM D149)
- Relative Permittivity, 1 MHz: 3 (ASTM D150)
- Dissipation Factor, 50/60 Hz: 0.0009 (ASTM D150)
- Dissipation Factor, 1 MHz: 0.01 (ASTM D150)
- Arc Resistance (Tungsten): PLC 5 (ASTM D495)
Flame Characteristics
- UL Recognized, 94HB Flame Class Rating: 1.47 mm (UL 94)
- Hot Wire Ignition: PLC 2 (UL 746A)
- High Voltage Arc Track Rate: PLC 2 (UL 746A)
- High Ampere Arc Ignition, Surface: PLC 1 (UL 746A)
- Comparative Tracking Index (UL): PLC 3 (UL 746A)
Injection Molding
- Drying Temperature: 120°C
- Drying Time: 3–4 hrs (Max cumulative: 48 hrs)
- Maximum Moisture Content: 0.02%
- Melt Temperature: 310–330°C
- Nozzle Temperature: 305–325°C
- Front-Zone 3 Temperature: 310–330°C
- Middle-Zone 2 Temperature: 300–320°C
- Rear-Zone 1 Temperature: 290–310°C
- Mold Temperature: 80–115°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 Impact & Toughness
With exceptional notched Izod impact strength, LEXAN 191 resists cracking and breaking from sudden force, perfect for protective housings and durable tool bodies.
High Heat Resistance & Stability
Featuring a Heat Deflection Temperature (HDT) of 126°C at 1.82 MPa, this resin maintains structural integrity in high-temperature applications.
Enhanced Chemical Resistance
Formulated for improved resistance to a range of chemicals, LEXAN Resin 191 protects components from degradation when exposed to cleaning agents, fuels, or industrial fluids.
Use & Applications
- Electrical Enclosures & Housings
- Automotive Interior & Under-hood Components
- Power Tool Housings
- Industrial Machine Parts and Guards
- Consumer Appliance Housings
- Medical Device Components
- Lighting Components