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	Original Value	Comments

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

Mechanical Properties	Original Value	Comments
Hardness, Rockwell R	87	ASTM D785
Tensile Strength	25.0 MPa	ASTM D638
Tensile Strength, Yield	30.0 MPa	ASTM D638
Elongation at Break	12 %	ASTM D638
Tensile Modulus	1.90 GPa	ASTM D638
Flexural Strength	47.0 MPa	ASTM D790
Flexural Modulus	1.60 GPa	ASTM D790
Izod Impact, Notched	0.200 J/cm	ASTM D256
Izod Impact, Unnotched (ISO)	10.0 kJ/m²

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

Thermal Properties	Original Value	Comments
CTE, linear	117 µm/m-°C	ASTM E831
Melting Point	233 °C	DSC Peak; JIS K7121
Deflection Temperature at 0.46 MPa (66 psi)	127 °C	ASTM D648
Vicat Softening Point	174 °C	ASTM D1525

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

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