Covestro Makrolon® Lumen XT sheet Polycarbonate

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Covestro Makrolon® Lumen XT sheet Polycarbonate
Categories:	Polymer; Thermoplastic; Polycarbonate (PC)
Material Notes:	Light diffusing Makrolon® Lumen XT sheet is a translucent polycarbonate product with a textured surface on one side specifically designed for lighting lenses. It features a unique combination of high light diffusion and high light transmission through a combination of optimized surface texture and advanced diffuser technologies. When compared to other light diffusing products such as glass and acrylic, Makrolon Lumen XT sheet has superior impact strength and toughness. Its higher flammability resistance and wider service temperature range provide an additional performance advantage over acrylic diffusers. The wide range of standard diffusion levels offers designers the flexibility to maximize light fixtures’ aesthetics and performance. Other surface textures are available for additional design options. Applications: Interior LED and conventional lighting fixtures Information provided by Covestro
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Physical Properties	Metric	English	Comments

Specific Gravity	1.20 g/cc	1.20 g/cc	ASTM D792
Water Absorption	0.15 % @Time 86400 sec	0.15 % @Time 24.0 hour	ASTM D570

Mechanical Properties	Metric	English	Comments
Tensile Strength, Yield	60.9 MPa	8830 psi	ASTM D638
Elongation at Break	94 %	94 %	ASTM D638
Tensile Modulus	2.31 GPa	335 ksi	ASTM D638
Flexural Strength	97.9 MPa	14200 psi	ASTM D790
Flexural Modulus	2.50 GPa	363 ksi	ASTM D790
Poissons Ratio	0.38	0.38	ASTM E132
Impact Test	66.4 J @Thickness 3.00 mm	49.0 ft-lb @Thickness 0.118 in	ASTM D3763

Electrical Properties	Metric	English	Comments
Volume Resistivity	>= 8.00e+15 ohm-cm	>= 8.00e+15 ohm-cm	ASTM D257
Dielectric Constant	2.88 @Frequency 60 Hz	2.88 @Frequency 60 Hz	ASTM D 150
	2.98 @Frequency 10 Hz	2.98 @Frequency 10 Hz	ASTM D 150
Dielectric Strength	18.1 kV/mm @Thickness 3.00 mm	460 kV/in @Thickness 0.118 in	ASTM D149
Dissipation Factor	0.0020 @Frequency 60 Hz	0.0020 @Frequency 60 Hz	ASTM D150
Arc Resistance	125 sec	125 sec	Tungsten Electrodes; ASTM D495

Thermal Properties	Metric	English	Comments
CTE, linear	67.5 µm/m-°C	37.5 µin/in-°F	ASTM D696
Thermal Conductivity	0.195 W/m-K	1.35 BTU-in/hr-ft²-°F	ASTM C177
Deflection Temperature at 0.46 MPa (66 psi)	142 °C	288 °F	ASTM D648
Deflection Temperature at 1.8 MPa (264 psi)	134 °C	273 °F	ASTM D648
Flammability, UL94	V-2 @Thickness 3.00 mm	V-2 @Thickness 0.118 in

Optical Properties	Metric	English	Comments
Transmission, Visible	55 % @Thickness 3.00 mm	55 % @Thickness 0.118 in	LW9; ASTM D1003
	62 % @Thickness 3.00 mm	62 % @Thickness 0.118 in	LC7; ASTM D1003
	67 % @Thickness 3.00 mm	67 % @Thickness 0.118 in	LW7; ASTM D1003
	73 % @Thickness 1.52 mm	73 % @Thickness 0.0600 in	LW9; ASTM D1003
	77 % @Thickness 3.00 mm	77 % @Thickness 0.118 in	LC5; ASTM D1003
	79 % @Thickness 1.52 mm	79 % @Thickness 0.0600 in	LC7; ASTM D1003
	81 % @Thickness 3.00 mm	81 % @Thickness 0.118 in	LW5; ASTM D1003
	82 % @Thickness 1.52 mm	82 % @Thickness 0.0600 in	LW7; ASTM D1003
	85 % @Thickness 3.00 mm	85 % @Thickness 0.118 in	LC3; ASTM D1003
	88 % @Thickness 1.52 mm	88 % @Thickness 0.0600 in	LC5; ASTM D1003
	90 % @Thickness 3.00 mm	90 % @Thickness 0.118 in	LC0; ASTM D1003
	90 % @Thickness 1.52 mm	90 % @Thickness 0.0600 in	LC3; ASTM D1003
	90 % @Thickness 3.00 mm	90 % @Thickness 0.118 in	LW3; ASTM D1003
	90 % @Thickness 1.52 mm	90 % @Thickness 0.0600 in	LW5; ASTM D1003
	91 % @Thickness 1.52 mm	91 % @Thickness 0.0600 in	LC0; ASTM D1003
	93 % @Thickness 1.52 mm	93 % @Thickness 0.0600 in	LW3; ASTM D1003

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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