Designation:D3531/D3531M−11StandardTestMethodforResinFlowofCarbonFiber-EpoxyPrepreg1ThisstandardisissuedunderthefixeddesignationD3531/D3531M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationoftheamountofresinflowthatwilltakeplacefromprepregtapeorsheetundergivenconditionsoftemperatureandpressure.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.2.1Withinthetext,inch-poundunitsareshowninbrack-ets.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.SummaryofTestMethod2.1Aweighedspecimenconsistingoftwopliesaminimumsizeof50-mm[2.0-in.]square,orientedina0°/90°crossplyconfiguration,andsandwichedbetweenbleedermaterialandreleasefilm.ThesandwichisplacedinaplatenpressheatedtoeithertemperatureA,120°C[250°F],ortemperatureB,175°C[350°F]oranotherspecifiedtemperature.Thepressisclosedtoprovideapressureof700kPa[100psi].Thepressureisheldfor15minoruntiltheresingels.Thecooledsandwichassemblyisremovedandtheresinthathasflowedtotheedgesofthespecimenisremovedandthespecimenreweighed.Thechangeinweightisexpressedasapercentoftheoriginalweightandreportedaspercentflow.3.SignificanceandUse3.1Thistestmethodisusedtoobtaintheresinflowofcarbonfiber-epoxyprepregtapeorsheetmaterial.Itissuitableforcomparinglotsofmaterialofsupposedlythesamecharac-teristicsandalsoforcomparative...
