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Permeation and Stress Relaxation Resistance of Elastomeric Fuel Seal Materials
Technical Paper
2001-01-1127
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
Today's fuel systems place many demands on the seals containing liquid and vapor hydrocarbons. California Air Resource's LEV II and EPA's Tier 2 demands require fuel systems which are essentially hermetically sealed with a robust, long term (12-15 year), life. Two properties which are key to long-term seal life are the material's ability to retain it's sealing force, and the ability to resist fuel permeation.
To evaluate these two fuel seal properties, testing was conducted on a number of rubber compounds including HNBR, an HNBR-fluoroplastic alloy, FVMQ (fluorosilicone), an FKM-FVMQ blend, and FKM. To evaluate permeation through a seal, Thwing Albert cups were fitted with stainless steel lids and sealing gaskets prepared from the various test materials. Fuel losses through the gaskets were determined at elevated temperatures. Long term, >1000 hour, stress relaxation testing was conducted in “hot” 60°C fuel and “sour” fuel on these compounds. The results of the permeation though sealing materials and the stress relaxation in fuel will be presented in this paper.
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Citation
Stevens, R., "Permeation and Stress Relaxation Resistance of Elastomeric Fuel Seal Materials," SAE Technical Paper 2001-01-1127, 2001, https://doi.org/10.4271/2001-01-1127.Also In
References
- SAE paper 880022 “Fluoroelastomer Developments for Automotive Fuel Systems” Stevens Ronald D. Thomas Eric. W. 1988
- SAE paper 920163 “Fuel-Alcohol Permeation Rates of Fluoroelastomers, Fluoroplastics, and Other Fuel Resistant Materials” Stahl W.M. Stevens R.D. 1992
- SAE paper 790659 “Effect of “Sour” Gasoline on Fuel Hose Rubber Materials” Nersasian A. 1979
- Rubber Division/ACS paper “New HNBR Polymers for Fuel Contact Applications” Griffin G.J. Gallager M.T. Sept. 21-24 1999
- SAE paper 2000-01-0752 “Compression Stress Relaxation Test Comparisons and Development” Tuckner Paul March 2000
- Detroit Rubber Group paper “Compression Stress Relaxation of Elastomers” Kotz Denise November 1995
- Rubber & Plastics News technical article “Seal industry rediscovers stress relaxation” Smith Kerry January 31 1994