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CLAREX® OPTICAL QUALITY
CELL CAST PRECISION
THIN SHEET
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THICKNESS and SIZES |
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400mm x 550mm available in
following thicknesses, shown as mm:
0.2 |
0.7 |
2.0 |
0.3 |
0.8 |
2.5 |
0.4 |
1.0 |
3.0 |
0.5 |
1.2 |
4.0 |
0.6 |
1.5 |
5.0 |
Please contact us if you require another thickness. |
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APPLICATIONS |
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LCD Protective Windows, Camera and
lens Covers, Fresnel Lens, Dial
Lens, Name Plate, Watch Cover, Architectural Models for Building,
Electronics Displays, etc.
* Machining and printing available
to customer specification. Contact Astra Products for details... |
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PHYSICAL PROPERTIES |
PROPERTY |
METHOD |
UNIT |
Normal
Grade |
Hard Coat
Grade |
SPECIFIC GRAVITY |
ASTM D-792 |
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1.19 |
1.19 |
OPTICAL |
Refractive Index |
ASTM D-542 |
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1.49 |
1.49 (1.54) |
MECHANICAL |
Elongation |
ASTM D-638 |
% |
5 |
5 |
Tensile Rupture Strength |
ASTM D-638 |
kg/cm2 |
750 |
650 |
Flexural Rupture Strength |
ASTM D-790 |
kg/cm2 |
1200 |
800 |
THERMAL |
Heat Distortion Temperature |
ASTM D-648 |
°C |
110 |
110 |
Maximum recommended
continuous temperature |
°C |
80 |
80 |
The factory can now offer these materials upon request with
higher temperature ratings, 90-95ºC.
Please contact us for more info. |
Coefficient of Thermal Expansion |
ASTM D-696 |
cm/cm/°C |
7 x 10-5 |
7 x 10-5 |
Specific Heat |
ASTM D-638 |
cal/gr°C |
0.35 |
0.35 |
DURABILITY |
Hot Resistance |
80°C x 100hr |
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No Change |
No Change |
Cold Resistance |
-40°C x 100hr |
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No Change |
No Change |
Humid Resistance |
60°Cx90%x100hr |
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No Change |
No Change |
Thermal Cycle |
-40°C <-> 80°C
(10 cycles) |
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No Change |
No Change |
ELECTRICAL |
Surface Resistivity |
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W |
>1016 |
>1016 |
PENCIL HARDNESS |
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2H |
6~8H |
CHEMICAL |
Methyl Alcohol (50%) |
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No Change |
No Change |
Ethyl Alcohol (50%) |
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No Change |
No Change |
Soap Aqua Solution |
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No Change |
No Change |
Toluene |
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Dissolved |
No Change |
Acetone |
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Dissolved |
No Change |
Benzene |
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Swollen |
No Change |
Ethylene Dichloride |
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Dissolved |
No Change |
ADHESION |
K-5400 |
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100/100 |
FLAMMABILITY |
UL standard |
>=0.8mm
Thickness |
94HB |
94HB |
* Value
provided cannot be guaranteed in your application due to
circumstances beyond our control.
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