Designation:D7559/D7559M−09(Reapproved2014)StandardTestMethodforDeterminingPressureDecayofInflatableRestraintCushions1ThisstandardisissuedunderthefixeddesignationD7559/D7559M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisintendedtodeterminetheabilityofaninflatablerestraintcushiontoretainairpressureatelevatedpressuresforaspecifiedtimeinterval.1.2Proceduresandapparatusotherthanthosestatedinthistestmethodmaybeusedbyagreementofpurchaserandsupplier,providedthespecificdeviationsfromthestandardacknowledgedinthereport.1.3Theresultsofthistestmethodshouldnotbeusedtopredicttheactualinternalpressuredecayofacushionduringadeployment.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodD6799TerminologyRelatingtoInflatableRestraints3.Terminology3.1ForallterminologyrelatingtoD13.20,Inflatablerestraints,refertoTerminologyD6799.3.1.1Thefollowingtermsarerelevanttothisstandard:deployment;inflatablerestraint.3.2Forallothertermsrelatedtotextiles,seeTerminologyD123.4.SummaryofTestMethod4.1Afterinflationwithairtoaspecificinitialinternalpressure,aninflatablerestraintcushionistestedtoforitsabilitytoretainaspecifiedresidualpressure(allowingforsomepressurelos...
