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HOME : M-BOND® ULTRA LOW PERMEATION FUEL AND VAPOR TUBING
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M-Bond® Ultra Low Permeation Fuel And Vapor Tubing
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The Challenge For Automakers
Future production vehicles worldwide will be required to meet ever increasing restrictions on evaporative emissions. Regulations issued by the U.S. Environmental Protection Agency (EPA) and the California Air Resources Board (CARB) approach zero emissions. Aggressive standards are being developed in Europe and Asia. Of total vehicle emissions, gasoline vapors represent 50% and the addition of ethanol in reformulated gasolines which are required in densely populated areas has worsened the problem. The net result of these developments for automakers is a pressing need for durable low permeation systems.
The Markel Solution
M-Bond® Ultra Low Permeation Fuel and Vapor Tubing provides a unique combination of the the lowest permeation rate and the most economical fuel system on the market today. The oligomer particulates common in unlined nylon tubes are eliminated. System integrity is possible in all fuel environments. The M-Bond® solution combines the strength of nylon with the chemical inertness and ultra low permeation of PTFE resin.
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• The conductive inner surface of M-Bond® is an integral part of the PTFE liner.
• M-Bond® provides the strongest nylon-to-liner bond.
• PTFE provides the optimum mechanical, thermal and permeation characteristics of the fluoropolymers tested.
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Performance Advantages Of M-Bond® Ultra Low Permeation Fuel And Vapor Tubing
Of all fluoropolymers tested, PTFE provides superior strength and flexibility, superior thermal performance and the lowest permeation rate. Flexural modulus is half that of ETFE. Stiffness is close to nylon yielding lower interlayer stress when the tube is formed into shapes. Folding endurance is 50 times better that ETFE.
PTFE provides superior thermal performance, delivering a service temperature 50% higher than that of ETFE, and a limiting oxygen index which exceeds that of ETFE by 150%.
PTFE offers the lowest permeation rate of all fluoropolymers.
The evaluation made when selecting material for use in M-Bond® Fuel Hose resulted in the selection of the optimum highly crystalline PTFE resin.
The non-polar structure of PTFE blocks polar fuel molecules better than all other fluoropolymer resins making it the optimum liner material for use with oxygenated fuels.
M-Bond® offers an integral conductive layer making delamination impossible. The conductive PTFE/carbon is an integral part of the PTFE liner. ETFE constructions have an additional boundary layer in dual wall construction. In M-Bond® constructions, the PTFE barrier wall is 50% greater than those in ETFE constructions.
Markel M-Bond® PTFE/nylon interface bond is the strongest commercially available, exceeding that of ETFE/nylon. In pull
strength comparisons, utilizing 6.35 mm contact lengths, M-Bond® averaged 59.5 pound to break versus 36.8 for an ETFE/PA composite control.
M-Bond® not only affords the lowest permeation, it does so while offering the best economy.
M-Bond® Ultra Low Permeation Fuel and Vapor Tubing meets the following automaker specifications:
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• GM 213M- fuel line (conductive)
• GM 6406M - vapor line (non-conductive)
• Ford WSS-M98D33 - A7 vapor line (non-conductive)
• Ford WSS-M98D33 - A8 fuel line (conductive)
• SAEJ2260
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The Market M-Bond® technology is applied to many automotive applications worldwide including jumper lines, fuel rails, evaporation and vapor lines, fuel bundles, OCVR lines, as well as high temperature aggressive fluid applications.
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Markel Corporation
435 School Lane
Plymouth Meeting, PA 19462
610-272-8960
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