Clarex Precision Thin Sheet

Available in clear and many colors - see standard colors.
Clear available 0.2mm thick and up.
Colors available 0.5mm thick and up.

Scratch Resistant (Hard Coat) Grade:
Available one side scratch resistant and both sides scratch resistant.

CLAREX® PRECISION THIN SHEET (poly-methyl methacrylate) affords unsurpassed optical properties, excellent uniform thickness (from .008 inch) and surface smoothness with high transmissive rates. Several surface options are available. Thicknesses as low as 0.008".
Many colors, including neutral grays, are available.

FEATURES:

•	Smooth surface - roughness less than 0.02 µ
•	Excellent uniform thickness
•	High light transmission 92 - 94%
•	Isotropic transmission
•	No double refraction - no retardation
•	High molecular weight - > 2 million
•	Excellent optical characteristics
•	Excellent weatherability
•	Available scratch-resistant, 6H - 8H pencil hardness

See transmission and reflectance charts

THICKNESS and SIZES

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.

APPLICATIONS

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		1.19	1.19
OPTICAL
Refractive Index	ASTM D-542		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		No Change	No Change
Cold Resistance	-40°C x 100hr		No Change	No Change
Humid Resistance	60°Cx90%x100hr		No Change	No Change
Thermal Cycle	-40°C <-> 80°C (10 cycles)		No Change	No Change
ELECTRICAL
Surface Resistivity		W	>10¹⁶	>10¹⁶
PENCIL HARDNESS			2H	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
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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