GENERAL PROPERTIES
Plavis ® polyimide shapes provide superior high-temperature resistance, excellent wear and friction properties, good electrical and physical properties, and chemical inertness.
Plavis polyimide delivers outstanding resistance to creep and lubricated or unlubricated performance, ultra-low outgassing, excellent mechanical strength and impact resistance. PLAVIS polyimide is applied in the industries of aircraft and aerospace, automotive, electrical and electronics, chemical and mechanical engineering, semiconductors, etc.
NOTE: Plavis may be compared favorably to Vespel ® polyimide produced by DuPont.
PLAVIS ® FEATURES • High-temperature performance. • Wear-Resistance • Chemical Resistance • Easy to Machine • Good Electrical Properties - Insulative • Creep Resistant • Radiation Resistance • Ultra Low Outgassing • Isostatically molded for uniform multidirectional performance.
PLAVIS ® APPLICATIONS • Rotary seal rings • Thrust washers and discs • Bushings • Flanged bearings • Plungers • Printer wire guides • Spline couplings • Wear strips • Valve seats • Thermal and electrical insulators • Wafer clamping, polishing and grinding rings • Wafer guides & carriers • Vacuum pads • Die pickup collets
PLAVIS ® SIZE AVAILABILITY Plavis ® polyimide is available in isotactically molded shapes as follows:
• Rods ... up to 2.5" (63mm) diameter by up to 17.7" (450mm) long
• Plates ... up to 2" thick x 12" x 12" (50mm thick x 304mm x 304mm)
PLAVIS ® GRADES Plavis ® N (comparable to Vespel ® SP-1)
Plavis ® N is the unfilled base resin grade. Plavis N provides maximum physical strength, elongation, and toughness as well as the best electrical and thermal insulation values. Typical applications include spacers, high-temp fixtures, valve seats, balls, gaskets, insulators, and seals.
Plavis ® G15 (comparable to Vespel ® SP-21)
Plavis ® G15 has 15% graphite by weight added to the base resin for increased wear resistance and reduced friction in applications such as bearings, thrust washers, bushings, seal rings, slide blocks and other wear applications. G15 has the highest mechanical properties of the graphite filled grades.
Plavis ® G40 (comparable to Vespel ® SP-22)
Plavis ® G40 has 40% graphite by weight for enhanced wear resistance, lower friction, improved dimensional stability (low coefficient of thermal expansion), and stability against oxidation. Typical uses are the same as those for G15.
Plavis ® MS (comparable to Vespel ® SP-3)
Plavis ® MS is 15% moly-filled (molybdenum disulfide solid lubricant) for wear and friction resistance in vacuum and other moisture-free environments where graphite actually becomes abrasive. Typical applications include seals, bushings, bearings, gears, and other wear surfaces in outer space, ultra-high vacuum or dry gas applications.
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TYPICAL PROPERTIES of PLAVIS ® | |||||
| ASTM or UL test | Property | N | G15 | G40 | MS |
| - | Composition / Filler Material | Unfilled | 15% Graphite | 40% Graphite | 15% Moly |
| PHYSICAL | |||||
| D792 | Density (lb/in³) (g/cm³) |
0.050 1.39 |
0.052 1.44 |
0.059 1.62 |
0.056 1.55 |
| D570 | Water Absorption (%) @ 50% RH | 0.95 | 0.90 | 0.80 | 0.90 |
| MECHANICAL | |||||
| D1708 | Tensile Strength, Ultimate @ 73°F (psi) @ 500°F (psi) |
13,300 7,300 |
11,400 6,800 |
10,600 5,900 |
11,400 - |
| D638 | Tensile Modulus (psi) | - | - | - | - |
| D1708 | Tensile Elongation, Ultimate @ 73°F (%) @ 500°F (%) |
12.8 8.9 |
11.2 7.4 |
9.5 5.7 |
6.3 - |
| D790 | Flexural Strength, Ultimate @ 73°F (psi) @ 500°F (psi) |
18,200 8,500 |
12,500 7,800 |
12,400 7,000 |
12,400 7,400 |
| D790 | Flexural Modulus @ 73°F (psi) @ 500°F (psi) |
443,000 247,000 |
397,000 334,000 |
683,000 400,000 |
426,000 341,000 |
| D695 | Compressive Strength, 1% strain @ 73°F (psi) 10% strain @ 73°F (psi) |
3,300 24,000 |
3,400 15,400 |
4,100 14,300 |
4,300 15,000 |
| D695 | Compressive Modulus (psi) | 336,000 | 410,000 | 411,000 | 355,000 |
| D785 | Hardness, Rockwell | M75-85 | M68-78 | M66-70 | M70-75 |
| D256 | IZOD Notched Impact (ft-lb/in) | 0.94 | 0.84 | 0.67 | - |
| THERMAL | |||||
| D696 | Coefficient of Linear Thermal Expansion (x 10-5 in./in./°F) |
3.1 | 1.9 | 1.4 | 2.2 |
| D648 | Heat Deflection Temp (°F / °C) at 264 psi |
680 / 360 | - | - | - |
| - | Max Continuous Operating Temp (°F / °C) | 465 / 240 | 465 / 240 | 465 / 240 | 480 / 250 |
| C177 | Thermal Conductivity (BTU-in/ft²-hr-°F) (x 10-4 cal/cm-sec-°C) |
- - |
- - |
- - |
- - |
| UL94 | Flammability Rating | - | - | - | - |
| ELECTRICAL | |||||
| D149 | Dielectric Strength (V/mil) short time, 1/8" thick | - | - | - | - |
| D150 | Dielectric Constant at 1 MHz | 2.91 | - | - | - |
| D150 | Dissipation Factor at 1 MHz | 0.0036 | - | - | - |
| D257 | Volume Resistivity (ohm-m) | 1013 - 1014 | 1012 - 1013 | 103 - 104 | - |
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.
©
Copyright Boedeker Plastics, Inc.
2008