Goodfellow TPX® DX845 Extrusion Grade Polymethylpentene

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Goodfellow TPX® DX845 Extrusion Grade Polymethylpentene
Categories:	Polymer; Thermoplastic; Polymethylpentene (PMP); Polymethylpentene, Molded
Material Notes:	This grade is highly recommended for film extrusion; also for injection molding, fiber extrusion and blow molding. TPX® is semi-crystalline, transparent, very light and - for a polyolefin - expensive. It has good release characteristics and good high frequency electrical and valuable acoustic/ultrasonic properties. Applications include medical and laboratory apparatus, microwave components and cookware and electronic components. Information provided by Goodfellow. TPX® is a trademark of Mitsui.
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Physical Properties	Metric	English	Comments

Density	0.833 g/cc	0.0301 lb/in³	ASTM D1505
Water Absorption	<= 0.010 %	<= 0.010 %	ASTM D570
Linear Mold Shrinkage, Flow	0.015 cm/cm	0.015 in/in	MCI Method 2
Linear Mold Shrinkage, Transverse	0.012 cm/cm	0.012 in/in	MCI Method 2
Melt Flow	9.0 g/10 min @Load 5.00 kg, Temperature 260 °C	9.0 g/10 min @Load 11.0 lb, Temperature 500 °F	ASTM D1238
Spiral Flow	50.0 cm	19.7 in	MCI Method 1

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell R	87	87	ASTM D785
Tensile Strength	25.0 MPa	3630 psi	ASTM D638
Tensile Strength, Yield	30.0 MPa	4350 psi	ASTM D638
Elongation at Break	12 %	12 %	ASTM D638
Tensile Modulus	1.90 GPa	276 ksi	ASTM D638
Flexural Strength	47.0 MPa	6820 psi	ASTM D790
Flexural Modulus	1.60 GPa	232 ksi	ASTM D790
Izod Impact, Notched	0.200 J/cm	0.375 ft-lb/in	ASTM D256
Izod Impact, Unnotched (ISO)	10.0 kJ/m²	4.76 ft-lb/in²

Electrical Properties	Metric	English	Comments
Volume Resistivity	>= 1.00e+16 ohm-cm	>= 1.00e+16 ohm-cm	ASTM D257
Dielectric Constant	2.1	2.1	ASTM D150
Dielectric Strength	65.0 kV/mm	1650 kV/in	ASTM D149

Thermal Properties	Metric	English	Comments
CTE, linear	117 µm/m-°C	65.0 µin/in-°F	ASTM E831
Melting Point	233 °C	451 °F	DSC Peak; JIS K7121
Deflection Temperature at 0.46 MPa (66 psi)	127 °C	261 °F	ASTM D648
Vicat Softening Point	174 °C	345 °F	ASTM D1525

Optical Properties	Metric	English	Comments
Refractive Index	1.46	1.46	ASTM D542
Haze	1.1 %	1.1 %	ASTM D1003
Transmission, Visible	94 %	94 %	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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