Covestro Makrolon® LD sheet Polycarbonate

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Covestro Makrolon® LD sheet Polycarbonate
Categories:	Polymer; Thermoplastic; Polycarbonate (PC)
Material Notes:	Light diffusing Makrolon® LD sheet is a polycarbonate product designed with an advanced light diffusion technology that provides excellent light uniformity without sacrificing light transmission. The proprietary diffuser technology eliminates visible hot spots from pinpoint LED lights in typical flat and formed sign applications. LD is available in a range of standard sign colors and can be custom matched to any color. Makrolon LD is easy to form, fabricate, and decorate, and has excellent impact strength and dimensional stability. The product’s UV resistance technology assures long lasting outdoor weathering performance. Makrolon LD is offered with a ten (10) year limited product warranty against breakage. Applications: Flat and formed sign faces, channel 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
Hardness, Rockwell M	70	70	ASTM D785
Hardness, Rockwell R	118	118	ASTM D785
Tensile Strength, Ultimate	65.5 MPa	9500 psi	ASTM D638
Tensile Strength, Yield	62.1 MPa	9010 psi	ASTM D638
Elongation at Break	110 %	110 %	ASTM D638
Tensile Modulus	2.34 GPa	339 ksi	ASTM D638
Flexural Strength	93.1 MPa	13500 psi	ASTM D790
Flexural Modulus	2.38 GPa	345 ksi	ASTM D790
Compressive Strength	86.2 MPa	12500 psi	ASTM D695
Compressive Modulus	2.38 GPa	345 ksi	ASTM D695
Shear Modulus	0.786 GPa	114 ksi	ASTM D732
Shear Strength	41.4 MPa	6000 psi	Yield; ASTM D732
	68.9 MPa	10000 psi	Break; ASTM D732
Izod Impact, Notched	8.54 J/cm @Thickness 3.17 mm	16.0 ft-lb/in @Thickness 0.125 in	ASTM D256
Izod Impact, Unnotched	NB @Thickness 3.17 mm	NB @Thickness 0.125 in	ASTM D256
Impact Test	>= 63.7 J @Thickness 3.17 mm	>= 47.0 ft-lb @Thickness 0.125 in	ASTM D3763

Electrical Properties	Metric	English	Comments
Volume Resistivity	8.20e+16 ohm-cm	8.20e+16 ohm-cm	ASTM D257
Dielectric Constant	2.96 @Frequency 10 Hz	2.96 @Frequency 10 Hz	ASTM D 150
	3.17 @Frequency 60 Hz	3.17 @Frequency 60 Hz	ASTM D 150
Dielectric Strength	15.0 kV/mm @Thickness 3.17 mm	381 kV/in @Thickness 0.125 in	ASTM D149
Dissipation Factor	0.00090 @Frequency 60 Hz	0.00090 @Frequency 60 Hz	ASTM D150
Arc Resistance	10 sec	10 sec	Stainless Steel Strip Electrode; ASTM D495
	120 sec	120 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)	132 °C	270 °F	ASTM D648
Brittleness Temperature	93.3 °C	200 °F	ASTM D746
Flammability, UL94	V-2 @Thickness 1.52 mm	V-2 @Thickness 0.0598 in
	V-0 @Thickness 5.59 mm	V-0 @Thickness 0.220 in

Optical Properties	Metric	English	Comments
Transmission, Visible	27 % @Thickness 3.00 mm	27 % @Thickness 0.118 in	B27 white; ASTM D1003
	50 % @Thickness 3.00 mm	50 % @Thickness 0.118 in	B48 white; ASTM D1003

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PCOVEST0838 / 202621

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