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Grade: DX845
Formula: PMP TPX®
Form: Coil
Material: Polymethylpentene (PMP, TPX™)
Commodity: Polymers
Surface Finish: Matt/Gloss
Color: Natural
The DX845 PMP Coil is part of Goodfellow's extensive range of polymer film products. With 44 variations available, this polymethylpentene (PMP) film can be customized to meet a specific thickness, width, surface finish and transparency. Its high impact strength, chemical resistance and electrical insulation make DX845 suitable for industrial applications like gaskets, spacers and insulation. The film's moisture barrier properties also allow its use in food packaging. With so many options, Goodfellow's DX845 PMP Coil meets the diverse needs of manufacturing and research.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Coil
Thickness ±20%

Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Good-Fair
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Fair-Poor
Greases and Oils Good-Fair
Halogenated Hydrocarbons Fair-Poor
Halogens Fair-Poor
Ketones Good-Fair
Electrical Properties
Element Value
Dielectric constant @1MHz 2.12
Dissipation factor @ 1kHz 0.0002
Volume resistivity( Ohmcm ) >10¹⁶
Physical Properties
Element Value
Flammability HB
Refractive index 1.463
Resistance to Ultra-violet Poor
Limiting oxygen index( % ) 17
Water absorption - over 24 hours( % ) 0.01
Density( gcm⁻³ ) 0.835
Mechanical Properties
Element Value
Hardness - Rockwell R85
Elongation at break( % ) 15
Tensile modulus( GPa ) 1.5
Izod impact strength( J m⁻¹ ) 49
Tensile strength( MPa ) 25.5
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 100
Heat-deflection temperature - 1.8MPa( C ) 40
Lower working temperature( C ) 20
Upper working temperature( C ) 75-115
Specific heat( J K⁻¹ kg⁻¹ ) 2000
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.17@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 117

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