DuPont Teijin Films Melinex® ST730 Polyester Film

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DuPont Teijin Films Melinex® ST730 Polyester Film
Categories:	Polymer; Film; Thermoplastic; Polyester, TP; Polyester Film
Material Notes:	Melinex® ST730 is an optically clear, high gloss, heat stabilized polyester film which is differentially treated on both sides. One side provides exceptional adhesion to both solvent based and UV curing inks and lacquers. The other side provides in addition to exceptional adhesion properties, unique UV Multipass exposure resilience. These characteristics make Melinex® ST730 film particularly suited for the graphics layer of membrane touch switches with a multifold exposure to UV. Approvals: UL 94 VTM-2 - for 500, 700, 1000 gauge (0.13, 0.18, 0.25mm) Information provided by DuPont.
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Physical Properties	Metric	English	Comments

Density	1.39 g/cc	0.0502 lb/in³
Thickness	125 - 250 microns	4.92 - 9.84 mil

Mechanical Properties	Metric	English	Comments
Flexural Strength	137.9 MPa	20000 psi
Coefficient of Friction	0.60	0.60

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+8 - 1.00e+12 ohm-cm	1.00e+8 - 1.00e+12 ohm-cm
Surface Resistivity per Square	1.00e+8 ohm	1.00e+8 ohm
Dielectric Constant	2.9	2.9
Dielectric Strength	118 kV/mm	3000 kV/in

Thermal Properties	Metric	English	Comments
CTE, linear	34.2 µm/m-°C @Temperature 20.0 - 50.0 °C	19.0 µin/in-°F @Temperature 68.0 - 122 °F
Melting Point	265 °C	509 °F
Shrinkage, MD	1.0 % @Temperature 150 °C, Time 1800 sec	1.0 % @Temperature 302 °F, Time 0.500 hour	Unrestrained
Shrinkage, TD	1.0 % @Temperature 150 °C, Time 1800 sec	1.0 % @Temperature 302 °F, Time 0.500 hour	Unrestrained

Optical Properties	Metric	English	Comments
Haze	1.0 % @Thickness 0.127 mm	1.0 % @Thickness 0.00500 in	ASTM D1003
	1.0 % @Thickness 0.178 mm	1.0 % @Thickness 0.00700 in	ASTM D1003
	1.2 % @Thickness 0.254 mm	1.2 % @Thickness 0.0100 in	ASTM D1003
Gloss	140 %	140 %
Transmission, Visible	88 %	88 %

Descriptive Properties
Coefficient of Hygroscopic Expansion	0.000006 IN/IN/% RH		40% - 80% RH

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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PDTZ9251 / 139575

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