GENERAL MOTORS ENGINEERING STANDARDS

</script>GENERAL MOTORS ENGINEERING STANDARDS
Thisspecificationcoverstheadhesion
requirementsofpressuresensitiveadhesivecoatedpartswhich
aresubjectedtolowornostressonthebondedsu**ceduring
shippingorafterassembly.Thesepartsareusuallymechani-
callyfastenedduringassemblyoperations.
1.1IfnoTypeisspecified,TypeIisassumed.
nopiu024 (2006-9-26 08:08:04)substrateinitiallyandaftereachstepoutlinedinthetestcycles
in4.3.5.
4.3.3ImpactTest.Samplesaretobetestedafteradwelltime
of20minutes.Assembliesmustwithstandtwo0.8Jimpacts
initiallyandaftereachstepoftheappropriatecycle.Faceor
reverseimpactshallbedeterminedbytheapplication.
4.3.4EdgeAdhesionTest.Samplesaretobetestedaftera
dwelltimeof20minutes.Edgesofadherendmustbesecurely
bondeddifficulttoliftinitiallyandaftertheappropriatecycle.
4.3.5CyclesGM9505P.Onecycleshallberun,unlessother-
wisespecified.
CycleD..........Forinteriorapplicationsabovethebeltline
CycleE..........Forinteriorapplicationsbelowthebeltline
CycleC..........Forexteriorapplicationsabovethebeltline
CycleF.........Forexteriorapplicationsbelowthebeltlinenopiu024 (2006-9-26 08:08:39)4.1RELEASELINER.Thereleaselinershalladheretothe
partsduringshipmentandstoragetoinsureprotectionofthe
adhesivecoating.Atthetimeofusage,thelinershallbe
readilyremovedwithouttearingordeformationofthepart.
4.2STORAGE.
4.2.1Theadhesivecoatedpartmustbeabletobebonded
afterstorageat40蔆for90days.
4.2.2Additionally,theadhesivecoatedpartmustwithstand
storageat60蔆for3days.
4.3ADHESION.Dependentuponthespecificapplication,
thedesignengineeristospecifywhichofthefollowing
requirementsareapplicable.
4.3.1CreepResistance.Oncebondedtotheappropriatesub-
strate,thepartmustremaininpositionwithoutshiftingfor7
daysat40蔆.Asamplesetshallbeinspectedforcompliance
withthisrequirementaftereachofthefollowingconditions:
AInitial,bondedasreceived,standardconditions(25
2蔆,50%RH)
BBonded#16蔆,

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