Designation:D689−17StandardTestMethodforInternalTearingResistanceofPaper1ThisstandardisissuedunderthefixeddesignationD689;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodmeasurestheforceperpendiculartotheplaneofthepaperrequiredtotearmultiplesheetsofpaperthroughaspecifieddistanceafterthetearhasbeenstarted,usinganElmendorf-typetearingtester.Themeasuredresultscanbeusedtocalculatetheapproximatetearingresistanceofasinglesheet.Inthecaseoftearingasinglesheetofpaper,thetearingresistanceismeasureddirectly.NOTE1—SimilarproceduresformakingElmendorf-typetearmeasure-mentsarefoundinISO1974andTAPPIT414.1.2Thistestmethodisnotsuitablefordeterminingthecross-directionaltearingresistanceofhighlydirectionalboardsandpapers.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,healthandenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D646TestMethodforMassPerUnitAreaofPaperandPaperboardofAramidPapers(BasisWeight)D685PracticeforConditioningPaperandPaperProductsforTestingD1749PracticeforInterlaboratoryEvaluationofTestMeth-odsUsedwithPaperandPaperProducts(Withdrawn2010)3E178PracticeforDealingWithOutlyingObservations2.2ISOStandard:4ISO1974Paper—DeterminationofTearingResistance(El-mendorfmethod)2.3TAPPIStandard:5TAPPIT414InternalT...
