Designation:D578/D578M−05(Reapproved2011)´1StandardSpecificationforGlassFiberStrands1ThisstandardisissuedunderthefixeddesignationD578/D578M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.ε1NOTE—EditorialchangesweremadethroughoutinAugust2011.1.Scope1.1Thisspecificationcoverstherequirementsforcontinu-ousfiberandstaplefiberglassstrands,includingsingle,pliedandmultiplewound.Italsocoverstexturedglassfiberyarns.Thisspecificationisintendedtoassistultimateusersbydesignatingthegeneralnomenclatureforthestrandproductsthatagegenerallymanufacturedintheglassfiberindustry.1.2Glassfibersareproducedhavingvariouscompositions.Generalapplicationsareidentifiedbymeansofaletterdesignation.Theletterdesignationrepresentsafamilyofglassesthathaveprovidedacceptableperformancetotheend-userintheintendedapplication.Forexample,thecompo-sitionlimitsstatedforE-Glassinthisspecificationrepresentingtheglassfiberfamilyforgeneralandmostelectricalapplica-tionsisdesignatedbytheletterE.Militaryspecifications,suchas,MIL-R-60346,recognizethecompositionlimitsdescribedinthisspecificationasmeetingtherespectiverequirementsforE-Glassstrandsusedinreinforcedplasticstructureapplica-tions.1.3Glassfiberstrandshaveavarietyofgeneralusesunderspecificconditions,suchashighphysicalorchemicalstress,highmoisture,hightemperature,orelectricalenvironments.Propertyrequirementsunderspecificconditionsareagreeduponbetweenthepurchaserandthesupplier.Electricalprop-ertyrequirementsvarywithspecificend-useapplications.Forprintedcircuitboardapplications,otherrequirementsmaybeneededsuchastheuseofInstituteforInterconnectingandPackagingElectronicCircuits(IPC)SpecificationEG4412AforfinishedfabricwovenfromE-Glassforprintedcircuitboards,orSpecificationMIL-P-1394...
