S-Plastics Lexan RL7220resin is Renamed ML7220 early December, 2002. LIMITED RAWS. PRODUCT LEADER APPROVAL REQUIRED PRIOR TO SALE. HighViscosity, UV-stabilized PC for ophthalmic lenses.
| MECHANICAL | Value | Unit | Standard |
| Tensile Stress, yld, Type I, 50 mm/min | 62 | MPa | ASTM D 638 |
| Tensile Stress, brk, Type I, 50 mm/min | 72 | MPa | ASTM D 638 |
| Tensile Strain, yld, Type I, 50 mm/min | 6.2 | % | ASTM D 638 |
| Tensile Strain, brk, Type I, 50 mm/min | 137 | % | ASTM D 638 |
| Tensile Modulus, 50 mm/min | 2270 | MPa | ASTM D 638 |
| Flexural Stress, yld, 1.3 mm/min, 50 mm span | 93 | MPa | ASTM D 790 |
| Flexural Modulus, 1.3 mm/min, 50 mm span | 2410 | MPa | ASTM D 790 |
| Purity, particles per gram > 50 microns | 1 | - | S-Plastics Method |
| Tensile Stress, yield, 50 mm/min | 62 | MPa | ISO 527 |
| Tensile Stress, break, 50 mm/min | 74 | MPa | ISO 527 |
| Tensile Strain, yield, 50 mm/min | 6 | % | ISO 527 |
| Tensile Strain, break, 50 mm/min | 145 | % | ISO 527 |
| Tensile Modulus, 1 mm/min | 2420 | MPa | ISO 527 |
| Flexural Stress, yield, 2 mm/min | 95 | MPa | ISO 178 |
| Flexural Modulus, 2 mm/min | 2190 | MPa | ISO 178 |
| IMPACT | Value | Unit | Standard |
| Izod Impact, notched, 23°C | 897 | J/m | ASTM D 256 |
| Instrumented Impact Total Energy, 23°C | 82 | J | ASTM D 3763 |
| Izod Impact, notched 80*10*4 +23°C | 58 | kJ/m² | ISO 180/1A |
| Izod Impact, notched 80*10*4 -30°C | 10 | kJ/m² | ISO 180/1A |
| Charpy 23°C, V-notch Edgew 80*10*4 sp=62mm | 78 | kJ/m² | ISO 179/1eA |
| Charpy -30°C, V-notch Edgew 80*10*4 sp=62mm | 20 | kJ/m² | ISO 179/1eA |
| THERMAL | Value | Unit | Standard |
| Vicat Softening Temp, Rate B/50 | 145 | °C | ASTM D 1525 |
| HDT, 0.45 MPa, 3.2 mm, unannealed | 137 | °C | ASTM D 648 |
| HDT, 1.82 MPa, 3.2mm, unannealed | 127 | °C | ASTM D 648 |
| HDT, 0.45 MPa, 6.4 mm, unannealed | 137 | °C | ASTM D 648 |
| HDT, 1.82 MPa, 6.4 mm, unannealed | 132 | °C | ASTM D 648 |
| CTE, -40°C to 40°C, flow | 7.56E-05 | 1/°C | ASTM E 831 |
| CTE, -40°C to 40°C, xflow | 7.38E-05 | 1/°C | ASTM E 831 |
| Vicat Softening Temp, Rate B/50 | 141 | °C | ISO 306 |
| Vicat Softening Temp, Rate B/120 | 142 | °C | ISO 306 |
| HDT/Be, 0.45MPa Edgew 120*10*4 sp=100mm | 137 | °C | ISO 75/Be |
| HDT/Ae, 1.8 MPa Edgew 120*10*4 sp=100mm | 124 | °C | ISO 75/Ae |
| PHYSICAL | Value | Unit | Standard |
| Specific Gravity | 1.19 | - | ASTM D 792 |
| Mold Shrinkage, flow, 3.2 mm | 0.6 - 0.8 | % | S-Plastics Method |
| Melt Flow Rate, 300°C/1.2 kgf | 8.7 | g/10 min | ASTM D 1238 |
| Density | 1.2 | g/cm³ | ISO 1183 |
| Melt Volume Rate, MVR at 300°C/1.2 kg | 8 | cm³/10 min | ISO 1133 |
| OPTICAL | Value | Unit | Standard |
| Light Transmission | 89 | % | ASTM D 1003 |
| Haze | 1 | % | ASTM D 1003 |
| Refractive Index | 1.586 | - | ASTM D 542 |
| Source GMD, last updated:11/19/2002 | |||
| Parameter | ||
| Injection Molding | Value | Unit |
| Drying Temperature | 120 | °C |
| Drying Time | 3 - 4 | hrs |
| Drying Time (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 |
| Source GMD, last updated:11/19/2002 | ||
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For more information please download the datesheet |
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S-Plastics Lexan Rl7220.pdf |
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