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What is KEVLAR®?
Dry Friction Product Specifications* - Clutchtex® P-7
Description:
KEVLAR® fiber composite material is a non-molded and non-asbestos, textile-reinforced polymer for industrial clutch and brake applications. Offers uniquely high wear resistance and low opposing surface wear. Available bonded to carrier plates in thicknesses as required (often laminated over a cork-nitrile substrate), or as a flexible laminate up to 10 mm (3/8") thick.
Physical and Mechanical Properties
Composition:
100% long KEVLAR® fibers and proprietary polymer binders. Includes no metal, no abrasives, no cotton, and no fillers.
Density: 0.91 g/cu. cm (0.033 lb./cu.in.)
Thermal conductivity: Extremely low
Shock resistance: Excellent (does not crack, or break)
Lubricant contaminant resistance: Does not degrade
Abrasiveness: Non-abrasive to opposing iron, steel, and copper
surfaces
Operating Conditions
Static pressure: Up to 6900 kPa (1,000 p.s.i.), (or as limited by
substrate)
Dynamic pressure: 140 - 3100 kPa (20-450 p.s.i.)
Temperature: Ambient to 315° C (600° F)
Surface speed: Static to 40 m/s (8,000 ft./min.)
Opposing surface: Machined and unfractured surface required, no
fine finishing necessary
Surface speed, temperature, and pressure are interdependent energy parameters. Values represent typical conditions and are not the ultimate limits of the material. Burnish time to achieve full mating surface contact can be three to five times that of conventional materials.
Approximate Dry Friction Properties (after extended burnish)
Wear rate: 1/5 to 1/10 that of asbestos materials, 1/2 to 1/3 that
of sintered bronze materials
Dynamic coefficient of friction: 0.36 µ ± 0.1 in the 95 - 345° C
range (200° F - 650° F).
Approximately 25% higher than
molded asbestos, glass -fibered,
and graphitic materials
Static to dynamic ratio: 1.05
Fade: Significant fade to 260° C
(500° F), accelerating at 370°C
(700° F)
*All values shown are approximations derived from a variety of tests and field applications.
No warranty or implied liability assumed herein. Friction values shown are for guide purposes only, as actual values can deviate with individual design and operating conditions.
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*All values shown are approximations derived from a variety of tests and field applications. No warranty or implied liability assumed herein. Friction values shown are for guide purposes only, as actual values can deviate with individual design and operating conditions.
Information courtesy of TRIBCO, Inc Cleveland, Ohio
Braketex® and Clutchtex® are registered trademarks of Tribco, Inc. of Cleveland, Ohio, USA.
No warranty or implied liability assumed herein. Patented.
©2001 Tribco, Inc. All rights reserved.
ZOOM's KEVLAR® facings and buttons are made with DuPont™ KEVLAR® brand fiber.
DuPont™ and KEVLAR® are trademarks or registered trademarks of E.I. du Pont de Nemours and Company.
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