Designation:D2923–01StandardTestMethodforRigidityofPolyolefinFilmandSheeting1ThisstandardisissuedunderthefixeddesignationD2923;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethoddescribestwoproceduresformeasur-ingtherigidityofpolyolefinfilmandsheeting.1.2ProcedureAprescribesaprocedureusinghigh-voltagestaticeliminatorsandtheuseofTFE-fluorocarbon2-coatedplatestoovercomethespuriouseffectsofstaticelectricityandfriction.1.3ProcedureBprescribestheuseofafinepowderonuncoatedplatestoachieveasimilareffect.NOTE1—Althoughthetwoproceduresaredesignedtoachievesimilareffect,theymaynotachievethesameresults.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE2—ThereisnosimilarorequivalentISOstandard.2.ReferencedDocuments2.1ASTMStandards:D618PracticeforConditioningPlasticsforTesting3D1898PracticeforSamplingofPlastics43.Terminology3.1Definitions:3.1.1rigidity—thatcombinationofthicknessandinherentstiffnessofapolyolefinfilmorsheetwhichresistsflexure.4.SummaryofTestMethod4.1Theresistancetoflexureofthesampleismeasuredbyastraingageaffixedtotheendofabeam,theoppositeendofwhichflexesthesamplebyforcingitintoagrooveorslotinahorizontalplatformuponwhichthesamplerests.Anindicatingmicroammeter,wiredtothestraingage,iscalibratedingramsofloadsensedbythestraingage.Therigidityisreaddirectlyfromthemeterandexpressedasgramspercentimetreofsamplewidth.5.SignificanceandUse5.1Therigidityofapolyolefinwebcanaffectitsmachin-ability,particularlyonthosepackagingmachineswhereacutportionofawe...
