作者:标准资料网 时间:2024-05-24 02:21:50   浏览:8157   来源:标准资料网

【英文标准名称】:StandardTestMethodsforAbilityofAdhesiveFilmstoSupportorResisttheGrowthofFungi
【原文标准名称】:胶粘膜支持或阻止霉菌生长能力的标准试验方法
【标准号】:ASTMD4300-2001(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D14.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:adhesivefilm;biodegradation;biologicaltesting;fungi;Contamination--adhesives;Fungalinfluence/resistance--adhesives;Biodegradation;Biologicaldataanalysis;Dryadhesives;Microbiologicalexamination;Mineralsaltsagar(MSA);Nuclearreactorves
【摘要】:Thesetestmethodsaredesignedtobeusedtodeterminethesusceptibilityoftheadhesivefilmtobiodegradationandwhethertheadhesivewillcarryintothebondlinesufficientanti-fungalpropertiestopreventgrowthoffungifrequentlypresentonthegluingequipment,onadherends,orintheadhesiveasapplied.Potatodextroseagar(PDA)providesacompletemediumforthegrowthoffungi,whilemineralsaltsagar(MSA)lacksacarbohydratesourceandprovidesalessfavorablemedium.UseofPDAteststheadhesivefilmforitsabilitytoresistthegrowthoffungionitssurfaceaswellasitsabilitytorepelacopiousgrowthoffungiontheadjacentagarsurface.UseofMSAteststheadhesivefilmprimarilyforitsabilitytoresistthegrowthoffungionitssurface.Whenitisused,thereisareducedpossibilitythatthegrowthfromtheagarwillbemis-readascomingfromtheadhesivefilm,sincefungalgrowthontheadjacentagarwillbescant.Note28212;ThemethodgivenhereusingtheMSAisbasedonPracticeG21,adaptedtobeusedwithadhesives.RequirementstomeettheapprovalofgovernmentspecificationsaretheuseoftheMSAdescribedin10.2,andamixedspeciesoffungidescribedin8.2fortheinoculum.Theresultsobtainedwhenusingtheproceduresgiveninthismethodapplyonlytothespeciesusedforthetesting.ThetestspecieslistedinSection8arefrequentlyusedbylaboratoriestotestforantifungalproperties,buttheyarenottheonlyoneswhichcouldbeused.Selectionofthefungalspeciestotestagainstrequiresinformedjudgmentbythetestinglaboratoryorbythepartyrequestingthetests.Thesemethodsareespeciallyusefulwhenspeciesthathavebeenisolatedfromcontaminatedadhesivesareusedasthetestspecies(seeSection8)toaidintheselectionofmoreeffectivefungicides.Theefficacyofsomebiocidesmaychangeinstorageduetothechemicalandthermalenvironmenttowhichtheyaresubjectedascomponentsofcertainadhesives.Thesetestmethodsarenotappropriatefordeterminingtheeffectoffungalcontaminationonadhesivesunderwater-soakingconditions,becausetheyarenotdesignedtocoverthepossibilityofwater-solublebiocidesleachingoutofthebondline.Thesetestmethodsaredependentuponthephysiologicalactionoflivingmicroorganismsunderareportedsetofconditions.Conclusionsabouttheresistanceofthetestadhesivetofungalattackcanbedrawnbycomparingtheresultstosimultaneouslyruncontrolsofknownresistance.SeeX5.2forstatementsregardingtestrepeatability.1.1Thesetestmethodstesttheabilityofadhesivefilmstoinhibitorsupportthegrowthofselectedfungalspeciesgrowingonagarplatesbyprovidingmeansoftestingthefilmsontwoagarsubstrates,onewhichpromotesmicrobialgrowth,andonewhichdoesnot.1.2Thesetestmethodsarenotappropriateforalladhesives.Theactivityofcertainbiocidesmaynotbedemonstratedbythesetestmethodsasaresultofirreversiblereactionwithsomeofthemediumconstituents.Note18212;Asanexample,quaternaryammoniumcompoundsareinactivatedbyagar.1.3Atestmethodisincludedforusewithlow-viscosityadhesivesalongwithanalternativemethodforusewithmastic-typeadhesives.Also,amethodapprovedbythegovernmentisgiven.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheusero......
【中国标准分类号】:G38
【国际标准分类号】:83_180
【页数】:9P.;A4
【正文语种】:英语