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Resimide® Polyimide Specification

 

  GRADES

Resimide® RM-1

Resimide ® RM-1 is the unfilled base resin grade. 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.

Resimide® RM-21

Resimide ® RM-21  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. RM-21 has the highest mechanical properties of the graphite filled grades.

Resimide® RM-22
Resimide ® RM-22 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  RM-21



Resimide® RM-211
Resimide ® RM-211  has 10% PTFE and 15% graphite by weight added to the base resin for the lowest coefficient of friction over a wide range of operating conditions. It also has excellent wear resistance up to 300°F (149°C). Typical applications include sliding or linear bearings as well as many wear and friction uses listed above.

Resimide® RM-3  
Resimide ® RM-3   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.


TYPICAL PROPERTIES of RESIMIDE®

ASTM or UL test Property RM-1 RM-21 RM-22 RM-211 RM-3
- Filler Material Unfilled 15% Graphite 40% Graphite 10% PTFE,
15% Graphite		 15% Moly
PHYSICAL
D792 Density (lb/in³)
(g/cm³)		 0.051
1.43		 0.055
1.51
1.43		 0.056
1.55		 0.058
1.60
D570 Water Absorption, 24 hrs @ 73°F (%)
48 hrs @ 122°F (%)		 0.24
0.72		 0.19
0.57		  
0.5		 0.21
0.49		 0.23
0.65
MECHANICAL
D638 Tensile Strength, Ultimate @ 73°F (psi)
@ 500°F (psi)		 12,500
6,000		 9,500
5,500		 7,500
3,400		 6,500
3,500		 8,200
-
D638 Tensile Modulus (psi) - - - - -
D638 Tensile Elongation, Ultimate @ 73°F (%)
@ 500°F (%)		 7.5
6.0		 4.5
6.0		 3.0
2.0		 3.5
3.0		 4.0
-
D790 Flexural Strength, Ultimate @ 73°F (psi)
@ 500°F (psi)		 16,000
9,000		 16,000
9,000		 13,000
6,500		 10,000
5,000		 11,000
5,500
D790 Flexural Modulus @ 73°F (psi)
@ 500°F (psi)		 450,000
250,000		 550,000
370,000		 700,000
400,000		 450,000
200,000		 475,000
270,000
D695 Compressive Strength, 10% strain @ 73°F (psi) 19,300 19,300 27,500 resin 14,800 18,500
D695 Compressive Modulus (psi) 350,000 420,000 475,000 300,000 350,000
D785 Hardness, Rockwell E45-60 E25-45 E5-25 E1-20 E40-55
D256 IZOD Notched Impact (ft-lb/in) 0.8 0.8 - - 0.4
  Poisson's Ratio 0.4 0.4 - - -
THERMAL
D696 Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)		 3.0 2.7 2.1 3.0 2.9
D648 Heat Deflection Temp (°F / °C)
at 264 psi
680 / 360
680 / 360		 - - -
- Max Continuous Operating Temp (°F / °C) 500 / 260 500 / 260 500 / 260 500 / 260 500 / 260
C177 Thermal Conductivity
(BTU-in/ft²-hr-°F)
(x 10-4 cal/cm-sec-°C)
2.0
6.9
6.0
20.7
12.0
41.3
5.3
18.3
3.2
11.0
UL94 Flammability Rating V-0 V-0 V-0 V-0 V-0
ELECTRICAL
D149 Dielectric Strength (V/mil) short time, 1/8" thick 560 250 - - -
D150 Dielectric Constant at 1 MHz 3.55 13.2 - - -
D150 Dissipation Factor at 1 MHz 0.0034 0.0106 - - -
D257 Volume Resistivity (ohm-cm)at 50% RH 1014 - 1015 1012 - 1013 - - -

 

GENERAL PROPERTIES

Resimide® is one of the highest performing engineering plastics currently available. Resimide®  will not melt and can operate continuously cryogenic temperatures to 550°F (288°C), with excursions to 900°F (482°C). Resimide®  parts consistently exhibit superior performance in a variety of applications requiring low wear and long life in severe environments.

Resimide®  FEATURES

• Excellent temperature resistance • High wear resistance (especially RM-21) • Dimensionally stable • Resistant to radiation • Extremely low outgassing • Relatively easy to machine

Resimide® 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

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 complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.

 
Resimide® is a registered trademark of  Resinol Plastics Inc.

 

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Last modified: Friday, June 21, 2024 06:44 PM