
GE Plastics LEXAN 121R Polycarbonate
| Physical Properties | Metric | English | Comments | |
|
|
||||
| Density | 1.2 g/cc | 0.0434 lb/in | ASTM D 792 | |
| Water Absorption | 0.15 % | 0.15 % | 24 hours @ 73F; ASTM D 570 | |
| Water Absorption at Saturation | 0.35 % | 0.35 % | Equilibrium, 73F; ASTM D 570 | |
| Water Absorption at Saturation | 0.58 % | 0.58 % | Equilibrium, 212F; ASTM D 570 | |
| Linear Mold Shrinkage | 0.005 - 0.007 cm/cm | 0.005 - 0.007 in/in | Flow, 0.125 inch; ASTM D 955 | |
| Melt Flow | 17.5 g/10 min | 17.5 g/10 min | 300C/1.2 kgf (O); ASTM D 1238 | |
Mechanical Properties |
||||
|
|
||||
| Hardness, Rockwell M | 70 | 70 | ASTM D 785 | |
| Hardness, Rockwell R | 118 | 118 | ASTM D 785 | |
| Tensile Strength @ Break | 68.9 MPa | 10000 psi | Type I, 2.0 in/min; ASTM D 638 | |
| Tensile Strength @ Yield | 62.1 MPa | 9000 psi | Type I, 2.0 in/min; ASTM D 638 | |
| Elongation at Break | 125 % | 125 % | Type I, 2.0 in/min; ASTM D 638 | |
| Elongation at Yield | 7 % | 7 % | Type I, 2.0 in/min; ASTM D 638 | |
| Flexural Modulus | 2.34 GPa | 340 ksi | 0.05 in/min, 2" span; ASTM D 790 | |
| Flexural Yield Strength | 96.5 MPa | 14000 psi | 0.05 in/min, 2" span; ASTM D 790 | |
| Fatigue Strength | 6.89 MPa | 1000 psi | Fatigue Limit, 2.5 MM cycles; ASTM D 671 | |
| Izod Impact, Unnotched | 32 J/cm | 60 ft-lb/in | 73F; ASTM D 4812 | |
| Gardner Impact @ 23C | 62.1 J | 45.8 ft-lb | Instrumented Impact Energy @ peak, 73F; ASTM D 3763 | |
| Tensile Impact Strength | 546 kJ/m | 260 ft-lb/in | Type "S"; ASTM D 1822 | |
| Falling Dart Impact | 169 J | 125 ft-lb | 73F; ASTM D 3029 | |
| Taber Abrasion, mg/1000 Cycles | 10 | 10 | CS-17, 1 kg; ASTM D 1044 | |
| Izod Impact, Notched | 6.94 J/cm | 13 ft-lb/in | 73F; ASTM D 256 | |
Electrical Properties |
||||
|
|
||||
| Volume Resistivity | Min 1e+017 ohm-cm | Min 1e+017 ohm-cm | ASTM D 257 | |
| Dielectric Constant | 2.96 | 2.96 | 1 MHz; ASTM D 150 | |
| Dielectric Constant | 3.17 | 3.17 | 60 Hz; ASTM D 150 | |
| Dielectric Strength | 15 kV/mm | 380 V/mil | in air, 125 mils; ASTM D 149 | |
| Dissipation Factor | 0.0009 | 0.0009 | 60 Hz; ASTM D 150 | |
| Dissipation Factor | 0.01 | 0.01 | 1 MHz; ASTM D 150 | |
| Comparative Tracking Index | 250 - 400 V | 250 - 400 V | (+/- 0.125 inch); PLC Code 2; UL 746A | |
| Hot Wire Ignition, HWI | 30 - 60 sec | 30 - 60 sec | (+/- 0.125 inch); PLC Code 2; UL 746A | |
| High Amp Arc Ignition, HAI | 60 - 120 arcs | 60 - 120 arcs | Surface (+/- 0.125 inch); PLC Code 1; UL 746A | |
| High Voltage Arc-Tracking Rate, HVTR | 25.4 - 80 mm/min | 1 - 3.15 in/min | (+/- 0.125 inch); PLC Code 2; UL 746A | |
Thermal Properties |
||||
|
|
||||
| CTE, linear 68°F | 68.4 m/m-C | 38 in/in-F | Flow, -40F to 200F; ASTM E 831 | |
| Heat Capacity | 1.26 J/g-C | 0.3 BTU/lb-F | ASTM C351 | |
| Thermal Conductivity | 0.25 W/m-K | 1.74 BTU-in/hr-ft-F | ASTM C177 | |
| Deflection Temperature at 0.46 MPa (66 psi) | 138 C | 280 F | 0.250 inch, unannealed; ASTM D 648 | |
| Deflection Temperature at 1.8 MPa (264 psi) | 129 C | 265 F | 0.250 inch, unannealed; ASTM D 648 | |
| Vicat Softening Point | 154 C | 310 F | Rate B; ASTM D 1525 | |
| UL RTI, Electrical | 130 C | 266 F | UL 746B | |
| UL RTI, Mechanical with Impact | 130 C | 266 F | UL 746B | |
| UL RTI, Mechanical without Impact | 130 C | 266 F | UL 746B | |
| Flammability, UL94 | HB | HB | Tested Thickness = 0.028 in. | |
Optical Properties |
||||
|
|
||||
| Refractive Index | 1.586 | 1.586 | ASTM D 542 | |
| Haze | 1 % | 1 % | 0.100 inch; ASTM D 1003 | |
| Transmission, Visible | 88 % | 88 % | 0.100 inch; ASTM D 1003 | |
Descriptive Properties |
||||
|
|
||||
| Radiant Panel Listing | UL tested | |||
| UL File Number, USA | E121562 | |||
| UV-light, water exposure/immersion | F2 | UL746C | ||