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1、Designation:D7310?11StardGuidefDefectDetectionRatingofPlasticFilmsUsingOpticalSenss1ThisstardisissuedunderthefixeddesignationD7310thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladoptioninthecaseofrevi

2、siontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thisguideisintendedtoprovidesuggestedapproachescriteriaftheob

3、servationreptingofdefectsinvarioustypesofplasticfilmbymeansofanopticalscanningsystem.1.2Thisstarddoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishap

4、propriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.NOTE1—ThereisnoknownISOequivalenttothisstard.2.ReferencedDocuments2.1ASTMStards:2D883TerminologyRelatingtoPlastics3.Terminology3.1Defin

5、itionsofTermsSpecifictoThisStard:3.1.1defect—fthepurposeofthisguideanyentityinthefilmthatislargeenoughtobedetectedbyanopticalsensiseitherpolymericinnaturecausedbydegradationexternalcontaminationundispersedadditivespigmen

6、tssimilarsources.4.SignificanceUse4.1Defectsinfilmarenotacceptabletotheenduserasthereisareductioninthefitnessfuseinmanyapplications.Thisdocumentisintendedtobeaguidetoassistusersintheinspectionobservationofdefects.4.2This

7、guideisapplicableinalabatyenvironmentasaqualitycontrolasaresearchtool.Itisalsoappropriatefuseinanycommercialprocessusedtoproducefilmincludingcalenderingsolventcasting.4.3Thisguideisalsosuitablefuseasanevaluationscreening

8、toolfmaterialsintendedtobeusedinotherprocesseswheredefectsofthisnaturearealsocriticalsuchasfiberspinningnonwovens.4.4Theindividualusermustestablishtherelationshipbetweenthecriteriaacceptanceffitnessfusetheobserveddefects

9、asitvariesbypolymerapplication.Thisisattainedbythecollectionofdataoveratimeperiodtoestablishacceptablecontrollimits.5.Apparatus5.1Extruder—Adevicefmeltingpolymerthatproducesaflatblown(tubular)filmwithsizesvaryingfromlabs

10、caletoproductionscale.NOTE2—Althoughthistechniqueisutilizedfmanydifferentprocessesusedfproducingfilmstheextrusionsystemsdescribedinthefollowingsectionrepresentthemeprevalentprocessused.Thisisnottoimplythattheguidanceprov

11、idedfutilizingthistypeofinstrumentationcannotbeappliedtootherprocessesotherapplications.5.1.1FlatFilmExtrusion—Anextrusionsystemthatproducesaflatfilmthatisquenchedimmediatelyafterextrusionbymeansofonemecoolingdevicessuch

12、asanairknifechillrollwaterbath.5.1.2Blowntubularextrusion–Anextrusionsystemthatproducesatubular“bubble”offilmfromacirculardieusuallyequippedwithanairringtocoolthepolymer.5.2ScreenPack—Althoughcommonlyusedincommercialsemi

13、commercialenvironmentsscreenpacksarenotgenerallyusedinlabatyunitsintendedfresearchqualityfunctions.5.3DefectDetectionSystem—Anopticalscanningsystemwithalightsourceananalogdigitalcameraanimageprocess.Theopticalacteristics

14、ofthecameraarecriticalfdetectingsmall(30m)defectsitisimptantthattheinstrumentmanufacturerbeinfmedofthedetectionneedswhenchoosingasystem.NOTE3—Othertypesofdetectionsystemsthantheonesdescribedinthisguideareavailablebutareo

15、utsidethescopeoftheguidearenotdefined.1ThisguideisunderthejurisdictionofASTMCommitteeD20onPlasticsisthedirectresponsibilityofSubcommitteeD20.19onFilmSheetingMoldedProducts.CurrenteditionapprovedDec.12011.PublishedJanuary

16、2012.iginallyapprovedin2007.Lastpreviouseditionapprovedin2007asD731007.DOI:10.1520D731011.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothest

17、ard’sDocumentSummarypageontheASTMwebsite.Copyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates1essentiallyservestotrackdeviationsfromtheacceptablelevels.Inthiscasetheacceptablelevel

18、sshallbedeterminedbytheacceptedfitnessfusesetbytheapplicationbyagreementbetweensupplieruser.NOTE7—Itisalsopossibletomonitcommercialqualitybytakingasampleoffilmevaluatingitusinganofflinesystem.Howeverthiswillnotprovidecon

19、tinuousmonitingnwillitnecessarilyberepresentativeoftheentirecommercialproductionquantity.6.2EvaluationofDefectsNOTE8—GeneralbestpracticeguidelinespossiblesourcesoftesterrarefoundinAppendixX1.6.2.1Flabatyevaluationsproduc

20、easufficientquantityoffilmtoensurethedefectfrequencyhasstabilized.NOTE9—Itiscriticalthatthesurroundingareanotbedisturbedduringtheevaluationasdustotherfeignparticulatematterarepronetocausingerroneousmeasurements.Coverthee

21、xtruderhopperduringtheevaluationtopreventtheinclusionofanyfeignmaterials.6.2.2Monitthefilmwiththeopticalscanningsystem.6.2.3Observations6.2.3.1Recdtheresultsofthemeasurementofdefectsasdetectedbythespecificinspectionsyste

22、m.6.2.3.2Categizecountthedefectsaccdingtosizeclassesotherspecificationsasdefinedbyinternalstardsagreementbetweensupplieruser.(a)Typicalunitsfreptingincludedefectspersquaremeter(squarefoot)defectareainpartspermillion(PPMd

23、efectarea=totaldefectareatotalareameasured)anyothermethodasdefinedbyinternalstardsagreementbetweensupplieruser.NOTE10—ExamplesofdatapresentationffilmdefectdetectionmonitingareshowninAppendixX3.Theexamplesofthereptsarefro

24、mthesameopticalscannerareprovidedasameansofdemonstratingthetypeofinfmationavailable.7.Rept7.1Completesampleidentification7.2Dateofsampletesting7.3MethodofEvaluation7.3.1EquipmentType(LabProductionFlatBlownetc.)7.3.2Scann

25、erMode(TransmissionReflection(anglesofcameralightsourcetothefilmfreflection))7.4Filmthickness7.5Areaoffilminspected7.6Defectobservationsize7.6.1MethodofObservations(measurement)basedoninternalrequirementstheacceptedfitne

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