CLAREX Hard Coat Sheet
CLAREX Hard Coat is applied to the either side of the Cell-Cast PMMA sheet to provide scratch resistance.
- Clarex Optical Grade Precision Sheet with a Hard Coat applied on one (RH10) or both sides (RH20).
- Pencil Hardness of 6-8H.
- Light transparency of 92-93%.
- No birefringence or double refraction, ideal for optical sensor cover application.
- Outstanding optical characteristics.
- Close tolerance and uniform thickness.
- Ultra smooth glass-like surface.
- Excellent weather resistance.
- Non-Glare surface texture can also be applied
- Anti-Reflection Coating surface treatment also available for improved light transmission
- Many standard substrate colours available or colour matching also available.
- Versatile substrate suitable for laser cutting, milling, printing, forming etc.
CLAREX Hard Coat Sheet Product Specification Data:
- Optical Filters
- Sensor Filters
- Display Protection Window
* Machining and printing available to customer specification. Please see out Machining and Fabrication page or Contact Us for more information
Please see below for a selection from our standard colour range. Please note we offer colour matching available to meet your requirements, contact us to learn more.
- 0.2mm to 5.0mm (in 0.1mm increments)
Please contact us if you require another thickness.
- 400 x 550mm
| Properties | Method | Unit | Normal Grade | Hard Coat Grade |
| Specific Gravity | ASTM D-792 | 1.19 | 1.19 | |
| Optical | ||||
| Refractive Index | ASTM D-542 | 1.49 | 1.49 (1.53) | |
| Mechanical | ||||
| Elongation | ASTM D-638 | % | 5 | 5 |
| Tensile Rupture Strength | ASTM D-638 | MPa | 70 | 45 |
| Flexural Rupture Strength | ASTM D-790 | MPa | 118 | 60 |
| Impact Strength (Izod) | ASTM D-256 | KJ/m2 | 2 | ----- |
| Rockwell Hardness | ASTM D-785 | 100 | ----- | |
| Thermal | ||||
| Heat Distortion Temperature | ASTM D-648 | ℃ | 110 | 110 |
| Maximum Recommended Continuous Temperature | ℃ | 80 | 80 | |
| Coefficient Of Thermal Expansion | ASTM D-696 | cm/cm/℃ | 7 x 10-5 | 7 x 10-5 |
| Coefficient Of Thermal Conductivity | ASTM D-177 | W/m℃ | 0.17 | 0.17 |
| Specific Heat | J/℃ | 1.47 | 1.47 | |
| Durability | ||||
| Hot Resistance | 80℃ x 100hr | No Change | No Change | |
| Cold Resistance | -40℃ x 100hr | No Change | No Change | |
| Humid Resistance | 60℃ x 90% x 100hr | No Change | No Change | |
| Thermal Cycle | -40℃ ⇔ 80℃ | No Change | No Change | |
| (10 cycles) | ||||
| Electrical | ||||
| Surface Resistivity | ASTM D-257 | Ω | ＞1016 | ＞1016 |
| Volume Resistivity | ASTM D-257 | Ωcm | ＞1016 | ＞1016 |
| Pencil Hardness | 2~3H | 6~8H | ||
| Chemical | ||||
| Methyl Alcohol (50%) | No Change | No Change | ||
| Ethyl Alcohol (50%) | No Change | No Change | ||
| Soap Aqua Solution | No Change | No Change | ||
| Toluene | Dissolved | No Change | ||
| Acetone | Dissolved | No Change | ||
| Benzene | Swollen | No Change | ||
| Ethylene Dichloride | Dissolved | No Change | ||
| Adhesion | K-5400 | 100/100 | ||
| Ethylene Dichloride | Dissolved | No Change | ||
| Flammability | UL standard | Thickness ≧0.8mm | 94HB | 94HB |