Serving
the World
ComPlex Plastics Serving
the World
GENERAL DESCRIPTION
TPX ® Polymethylpentene is the lightest of all known polymers with a density of 0.83 g/cm³. It's most important property is optical transparency in both the far-infrared and visible parts of the spectrum. TPX ® also has excellent electrical insulating and chemical resistance properties, and offers a very high melting point. It is available in sheet, rod, tube and film forms.
OPTICAL AND ACOUSTIC PROPERTIES
TPX ® is optically transparent in far-infrared and visible parts of the spectrum, allowing the co-transmission of a HeNe laser alignment beam. Index of refraction is 1.46 and is relatively independent of wavelength. Loss is very low at mm-wavelengths and gradually increases until becoming unacceptable in the mid-IR at about 30 to 50 microns wavelength.
Because of its low density, TPX ® has high acoustic efficiency (a high damping factor due to large internal losses.) It also displays exceptionally low distortion and high power handling characteristics.
APPLICATIONS
Sound equipment -- speaker cones, ultrasound scanners
Medical -- instrument handles, petri dishes
Laser lenses
Microwave oven trays
Release paper
TYPICAL PROPERTIES of TPX ® PolyMethylPentene |
||
| ASTM or UL test | Property | TPX |
| PHYSICAL | ||
| D792 | Density (lb/in³) (g/cm³) |
0.030 0.83 |
| D570 | Water Absorption, 24 hrs (%) | 0.01 |
| MECHANICAL | ||
| D638 | Tensile Strength (psi) | 4,100 |
| D638 | Tensile Modulus (psi) | 280,000 |
| D638 | Tensile Elongation at Break (%) | 10 |
| D790 | Flexural Strength (psi) | 6,100 |
| D790 | Flexural Modulus (psi) | 210,000 |
| D695 | Compressive Strength (psi) | - |
| D695 | Compressive Modulus (psi) | - |
| D785 | Hardness, Shore D | D85 |
| D256 | IZOD Notched Impact (ft-lb/in) | 1 |
| THERMAL | ||
| D696 | Coefficient of Linear Thermal Expansion (x 10-5 in./in.- °F) |
6.5 |
| D648 | Heat Deflection Temp (°F / °C) at 264 psi |
212 / 100 |
| D3418 | Melting Temp (°F / °C) | 464 / 240 |
| - | Max Operating Temp (°F / °C) | - / - |
| C177 | Thermal Conductivity (BTU-in/ft²-hr-°F) (x 10-4 cal/cm-sec-°C) |
1.16 4.0 |
| UL94 | Flammability Rating | HB |
| ELECTRICAL | ||
| D149 | Dielectric Strength (V/mil) short time, 1/8" thick | 20 |
| D150 | Dielectric Constant at 1 KHz | 2.12 |
| D150 | Dissipation Factor at 1 MHz | 0.000025 |
| D257 | Volume Resistivity (ohm-cm)at 50% RH | > 1016 |
NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets.
All values at 73°F (23°C) unless otherwise noted.
TPX is a registered trademark of Mitsui Petrochemical Industries, Ltd.
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