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Rulon Bearings

Chemours Teflon™ 7A X Granular PTFE Resin
Categories: Polymer; Thermoplastic; Fluoropolymer; Polytetrafluoroethylene (PTFE); Polytetrafluoroethylene (PTFE), Molded

Material Notes: Teflon™ PTFE 7A X is a white powder with a small particle size. Its small particle size helps to minimize voids, even at relatively low molding pressures. High bulk density increases the size of moldings possible from a given mold or press opening. Teflon™ PTFE 7A X is preferred for large moldings requiring optimum mechanical and electrical properties. It offers an excellent combination of properties that are characteristic of Teflon™ fluoroplastic resins. Properly processed products made from neat Teflon™ PTFE.7A X provide the superior properties typical of fluoroplastic resins. It’s easy to process, handle, and machine. Many end products are fabricated from billets, which include skived film and sheet. It can be used for applications, such as: Gaskets, Packings, Mechanical seals, Bridge or pipeline bearing pads, Shaft bearings, Electrical insulators, Piston rings, Expansion bellows, Diaphragms, Chemical linings. The use of fillers provides a wide choice of modified, mechanical properties.

Information provided by Chemours.

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Physical PropertiesMetricEnglishComments
Specific Gravity 2.16 g/cc2.16 g/ccASTM D4894
Bulk Density 0.460 g/cc0.0166 lb/in³ASTM D4894
Water Absorption <= 0.010 %
@Time 86400 sec
<= 0.010 %
@Time 24.0 hour
ASTM D570
Particle Size 38 µm38 µmAverage; ASTM D4894
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 50 - 6550 - 65ASTM D2240
Tensile Strength 48.3 MPa
@Thickness 0.130 mm
7010 psi
@Thickness 0.00512 in
skived tape; ASTM D4894
Elongation at Break 375 %
@Thickness 0.130 mm
375 %
@Thickness 0.00512 in
skived tape; ASTM D4894
Flexural Modulus 0.496 GPa71.9 ksiASTM D790
Flex Crack Resistance >= 1.00e+6>= 1.00e+6Cycles MIT Folding Endurance; ASTM D2176
Izod Impact, Notched 1.87 J/cm3.50 ft-lb/inASTM D256
Coefficient of Friction 0.050 - 0.100.050 - 0.10ASTM D1894
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity >= 1.00e+18 ohm-cm>= 1.00e+18 ohm-cmASTM D257
Surface Resistivity per Square >= 1.00e+18 ohm>= 1.00e+18 ohmASTM D257
Dielectric Constant 2.1
@Frequency 1e+6 Hz
2.1
@Frequency 1e+6 Hz
ASTM D150
Dielectric Strength 18.0 kV/mm
@Thickness 0.100 mm
457 kV/in
@Thickness 0.00394 in
ASTM D149
Dissipation Factor <= 0.00010
@Frequency 1e+6 Hz
<= 0.00010
@Frequency 1e+6 Hz
ASTM D150
Arc Resistance >= 300 sec>= 300 secASTM D495
 
Thermal PropertiesMetricEnglishComments
Melting Point 327 °C621 °FASTM D3418
 327 °C621 °FSecond Peak; ASTM D4591
 344 °C651 °FInitial Peak; ASTM D4591
Flammability, UL94 V-0V-0
Oxygen Index >= 95 %>= 95 %ASTM D2863
 
Processing PropertiesMetricEnglishComments
Moisture Content <= 0.040 %<= 0.040 %ASTM D4894
 
Descriptive Properties
Chemical/Solvent ResistanceExcellentASTM D543
Detergent Resistance (hours)24On grit blast aluminum
 264
 624On aluminum
Heat of Combustion5.1 MJ/kgASTM D240
Salt Spray Resistance Coatings (hours)192ASTM B117. 5% NaCl at 35 °C (95 °F). On aluminum.
 744+ASTM B117. 5% NaCl at 35 °C (95 °F).
Thermal Instability Index3ASTM D4894
Weather Resistance (years unaffected)20Florida Exposure

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PDU8831 / 268758

Aluminum Castings

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