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
PropertiesMethodUnitNormal GradeHard Coat Grade
Specific GravityASTM D-7921.191.19
Refractive IndexASTM D-5421.491.49 (1.53)
ElongationASTM D-638%55
Tensile Rupture StrengthASTM D-638MPa7045
Flexural Rupture StrengthASTM D-790MPa11860
Impact Strength (Izod)ASTM D-256KJ/m22-----
Rockwell HardnessASTM D-785100-----
Heat Distortion TemperatureASTM D-648110110
Maximum Recommended Continuous Temperature8080
Coefficient Of Thermal ExpansionASTM D-696cm/cm/℃7 x 10-57 x 10-5
Coefficient Of Thermal ConductivityASTM D-177W/m℃0.170.17
Specific HeatJ/℃1.471.47
Hot Resistance80℃ x 100hrNo ChangeNo Change
Cold Resistance-40℃ x 100hrNo ChangeNo Change
Humid Resistance60℃ x 90% x 100hrNo ChangeNo Change
Thermal Cycle-40℃ ⇔ 80℃No ChangeNo Change
(10 cycles)
Surface ResistivityASTM D-257Ω>1016>1016
Volume ResistivityASTM D-257Ωcm>1016>1016
Pencil Hardness2~3H6~8H
Methyl Alcohol (50%)No ChangeNo Change
Ethyl Alcohol (50%)No ChangeNo Change
Soap Aqua SolutionNo ChangeNo Change
TolueneDissolvedNo Change
AcetoneDissolvedNo Change
BenzeneSwollenNo Change
Ethylene DichlorideDissolvedNo Change
Ethylene DichlorideDissolvedNo Change
FlammabilityUL standardThickness ≧0.8mm94HB94HB

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.

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