CLAREX Hard Coat Sheet
CLAREX Hard Coat is applied to 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.
- A variety of standard substrate colours or bespoke colour matching is available.
- Versatile substrate suitable for laser cutting, milling, printing, forming etc.
Contact us: 01296 622180
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 |
Speak To Us Today About Your Acrylic Requirements
We are happy to answer technical product questions that you may have, including application usage. Further product technical data can also be provided upon request.