800787 HighPerformance FuelLine forEmerging Automotive Needs B.Spoo Commercial Chemicals Division 3M, St.Paul, MN Passenger CarMeeting HyattRegency, Dearborn June9-13,1980 $,~iV1tif%ft#J l'"~(;'f'"*\/ti:t;,'"kJl~'"~t"'*w:!t:'Wfr~ ~Wdr~ ~'",",,:$B""'~#;:;t<'~"'w"{;~~,ri'!'~";:>,.,.,,1:'?iit...):;~"~lt~.i;"~",;>;%.*di·~ W<~'¢:~,.""'" 400 Cf,)r!~Mt)NW¥@E.Atrr4 ftR@V£ ¥jAf:;¥t&~N~)j:%tE~ ~;'~ENNS<\(t",VA,N~A lSfYf*fJDownloaded from SAE International by University of New South Wales, Sunday, August 19, 2018Theappearance ofthecodeatthebottomofthefirstpageofthispaperindicates SAE'sconsentthatcopiesofthepapermaybemadeforpersonal orinternaluse,or forthepersonal orinternaluseofspecificclients,Thisconsentisgivenonthecon­ dition,however, thatthecopierpaythestatedperarticlecopyfeethrough the Copyright Clearance Center,Inc"Operations Center,P,O,Box765,Schenectady, N,Y,12301,forcopyingbeyondthatpermitted bySections 107or108oftheU,S, Copyright Law,Thisconsentdoesnotextendtootherkindsofcopying suchas copying forgeneral distribution, foradvertising orpromotional purposes, for creating newcollective works,orforresale, Paperspublished priorto1978mayalsobecopiedataperpaperfeeof$2,50 undertheabovestatedconditions, SAEroutinely stocksprintedpapersforaperiodofthreeyearsfollowing dateof publication, DirectyourorderstoSAEOrderDepartment. Toobtainquantity reprintrates,permission toreprintatechnical paperorper­ missiontousecopyrighted SAEpublications inotherworks,contacttheSAE Publications Division. ISSN0148-7191 Copyright ©1980SocietyofAutomotive Engineers, Inc.Downloaded from SAE International by University of New South Wales, Sunday, August 19, 2018ABSTRACT Anewcomposite automotive fuellinehoseconstruction hasbeendeveloped usingathinfluorocarbon "veneer" bonded toahydrocarbon outertubeandcover. This reportwilldiscuss laboratory testdatainvolving two suchfluorocarbon compositions' resistance topermeation, "sour"gasoline attack andgasoline/alcohol blends. Lab dataandpreliminary fieldtesting suggests thissystem willprovide, inonehoseconstruction, theanswer for thesethreeemerging automotive fuellinehoseproblem areas. 0148·7191/80/0609-0787$02.50 Copyright ©1980SocietyofAutomotive Engineers, Inc.Downloaded from SAE International by University of New South Wales, Sunday, August 19, 2018Downloaded from SAE International by University of New South Wales, Sunday, August 19, 2018HIGHPERFORMANCE FUELLINEHOSEFOREMERGING AUTOMOTIVE NEEDS INTRODUCTION Thepurpose ofthispaperistodescribe anewcomposite fuellinehoseconstruction thathasbeendeveloped tofulfill several emerging automotive needs. Thiscomposite utilizes a fluorocarbon elastomer veneerinnertubewhichisbondedtoa hydrocarbon elastomer outertube. Conventional reinforcing materials andcoverstocksarethenusedtofinish thehose construction. Thisreportwilldiscuss laboratory testdata involving theperformance oftwofluorocarbon materials asit relates topermeation resistance, sourgasoline resistance and compatibility withfuelextenders andadditives suchaslow molecular weight alcohols andethers. DISCUSSION Elastomeric composites thathavebeenusedinthepastforfuel linehoseare: 1.Nitrile tube/chloroprene cover. 2.Improved nitrile tUbe/chlorosulfonated polyethylene cover, and 3.Epichlorohydrin tube/epichlorohydrin cover. Eachoftheseconstructions filled aneedthatwascurrent in theirtime. Theyeachhavehadtheirperiod of"usefulness". Butasautomotive fuellinehoseneedshavechanged, thematerials ofconstruction havechanged accordingly. Asmoreozoneand oxidation resistance wasrequired, chloroprene wasgradually replaced bychlorosulfonated polyethylene asthecoverstock. Whenimproved resistance tooil,aromatic fuelsandhigher under thehoodtemperatures became afactor, epichlorohydrin replaced nitrile asthetubestockandchlorosulfonated polyethylene as thecoverstockinsomeapplications. Today, automotive design engineers arefacedwiththreenew fuellinehoserequirements, namely, permeation resistance, sour gasoline resistance andcompatibility withvarious fu