Covestro Makrolon® SK1 sheet Polycarbonate

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Covestro Makrolon® SK1 sheet Polycarbonate
Categories:	Polymer; Thermoplastic; Polycarbonate (PC)
Material Notes:	Skylight prismatic Makrolon® SK1 sheet‘s prismatic pattern is optimized to diffuse and distribute light while maintaining high light transmission, making it the material of choice for daylighting applications. The product is available with a UV enhanced cap layer in both clear and white. Makrolon SK1 can be drape or thermoformed for use in contoured applications such as domed skylights. In either flat or contoured geometries, it has a higher impact resistance compared to acrylic or glass. Makrolon SK1 has a Limited Product Warranty against breakage, yellowing, and loss of light transmission. Applications: Awnings, entryway canopies, skylights, barrel vaults, glazed archways, covered pedestrian walkways, and sloped, vertical, and curved glazing 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 at Break	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
Poissons Ratio	0.38	0.38	ASTM E132
Shear Modulus	0.786 GPa	114 ksi	ASTM D732
Shear Strength	41.4 MPa	6000 psi	Yield; 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	32.0 J/cm @Thickness 3.17 mm	60.0 ft-lb/in @Thickness 0.125 in	no failure; ASTM D256
Impact Test	>= 63.7 J @Thickness 3.17 mm	>= 47.0 ft-lb @Thickness 0.125 in	ASTM D3763

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

Optical Properties	Metric	English	Comments
Refractive Index	1.586	1.586	ASTM D542
Transmission, Visible	72 % @Thickness 3.00 mm	72 % @Thickness 0.118 in	B72 White; ASTM D1003
	92 % @Thickness 3.00 mm	92 % @Thickness 0.118 in	Clear; 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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