PMMA MOULDING-LG-LH830A
Material Notes:
Highest of all grades in heat resistanceMechanical strength and surface hardnessParticularly recommended for tail lamp, reflectors, and general lighting fixturesFeatures: Excellent transparency and eleganceWeather resistance and chemical resistanceSurface hardness and coloring propertySuperior electrical resistance and mechanical propertiesNo harm causedApplications: Automotive Parts: Rear lamp coverTurn signal lamp coverIndoor lamp coverRear quarter glassAutomotive badgeElectric or Electronic Parts:LCD light guide plateMicrowave oven door/front panelCassette doorVCR cover/front panelCar stereo panelDial scaleLight pipeSheet:SignboardShowcaseLight domeAquariumPicture frameLighting and Miscellaneous:Solid surfaceLighting coverOrnamentsWatch crystalOptical lensPiano keyboardInformation Provided by LG Chem
| Physical Properties | Metric | English | Comments |
| Specific Gravity | 1.18 g/cc | 1.18 g/cc | ASTM D792 |
| Water Absorption | 0.30 % | 0.30 % | 24 hours; ASTM D570 |
| Linear Mold Shrinkage | 0.0020 – 0.0060 cm/cm | 0.0020 – 0.0060 in/in | ASTM D955 |
|
Melt Index of Compound |
2.5 g/10 min
@Load 3.80 kg, Temperature 230 °C |
2.5 g/10 min
@Load 8.38 lb, Temperature 446 °F |
ASTM D1238 |
| Mechanical Properties | Metric | English | Comments |
| Hardness, Rockwell M | 99 | 99 | ASTM D785 |
| Tensile Strength at Break | 75.0 MPa | 10900 psi | ASTM D638 |
| Elongation at Break | 14 % | 14 % | ASTM D638 |
| Flexural Strength | 137 MPa | 19900 psi | ASTM D790 |
| Flexural Modulus | 3.298 GPa | 478.3 ksi | ASTM D790 |
| Izod Impact, Notched | 0.147 J/cm | 0.275 ft-lb/in | ASTM D256 |
| Thermal Properties | Metric | English | Comments |
|
CTE, linear |
60.0 µm/m-°C
@Temperature 20.0 °C |
33.3 µin/in-°F
@Temperature 68.0 °F |
ASTM D696 |
| Deflection Temperature at 1.8 MPa (264 psi) | 103 °C | 217 °F |
ASTM D648 |
| Vicat Softening Point Thermal Properties | 113 °C
Metric |
235 °F
English |
1 kg; ASTM D1525
Comments |
| Annealing Point | 80.0 – 90.0 °C | 176 – 194 °F | 3-5 hours |
| Optical Properties | Metric | English | Comments |
| Refractive Index | 1.49 | 1.49 | ASTM D542 |
|
Haze |
0.50 %
@Thickness 3.20 mm |
0.50 %
@Thickness 0.126 in |
ASTM D1003 |
|
Transmission, Visible |
93 %
@Thickness 3.20 mm |
93 %
@Thickness 0.126 in |
ASTM D1003 |
| Electrical Properties | Metric | English | Comments |
| Volume Resistivity | >= 1.00e+15 ohm-cm | >= 1.00e+15 ohm-cm | ASTM D257 |
|
Dielectric Constant |
4.0
@Frequency 60 Hz |
4.0
@Frequency 60 Hz |
ASTM D150 |
| Dielectric Strength | 20.0 kV/mm | 508 kV/in | 4kV/s; ASTM D149 |
|
Dissipation Factor |
0.050
@Frequency 60 Hz |
0.050
@Frequency 60 Hz |
ASTM D150 |
| Processing Properties | Metric | English | Comments |
| Processing Temperature | 220 – 260 °C | 428 – 500 °F | Injection molding cylinder temperature |
| Mold Temperature | 70.0 – 80.0 °C | 158 – 176 °F | |
| Drying Temperature | 80.0 – 90.0 °C | 176 – 194 °F | |
| Dry Time | 4 – 6 hour | 4 – 6 hour | |
| Injection Pressure | 78.45 – 147.1 MPa | 11380 – 21340 psi |
Specification: PMMA MOULDING-LG-LH830A
|
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