预览加载中，请您耐心等待几秒...

PE桶泄漏原因失效分析.docx

预览
1/3
2/3
3/3

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

PE桶泄漏原因失效分析 Introduction Polyethylene(PE)bucketshavebeenwidelyusedforvariousindustrialandhouseholdapplicationsduetotheirexcellentpropertiessuchaslowcost,lightweight,durability,andresistancetochemicalsandUVradiation.However,theleakageofPEbucketsisacommonproblemthataffectsthesafety,functionality,andeconomicviabilityoftheproducts.ThecausesofPEbucketleakagecanbemultifacetedandcomplex,involvingfactorsincludingmaterialproperties,processingconditions,designfeatures,andenvironmentalfactors.ThispaperaimstoexplorethereasonsforthefailureofPEbucketsandprovideanoverviewofthecurrentsolutionsandchallengesinpreventingormitigatingtheleakageissue. MaterialProperties ThequalityandpropertiesofthePEmaterialusedformanufacturingthebucketsplayacriticalroleindeterminingtheleakresistanceandintegrityoftheproduct.PEisclassifiedintoseveraltypesbasedontheirdensity,branching,andmolecularweightdistribution.Low-densitypolyethylene(LDPE)isacommonlyusedmaterialforbucketsduetoitsflexibility,toughness,andprocessability.However,LDPEcanexhibitslowcrackgrowth(SCG)andenvironmentalstresscracking(ESC)whenexposedtocertainchemicalsorstressconditions.BothSCGandESCcaninitiatefissuresorfracturesinthematerial,leadingtotheformationofleakpathsovertime.Therefore,itiscrucialtoselecttheappropriatetypeandgradeofPEmaterialthatcanwithstandtheintendeduseandexposureconditionsofthebuckets. ProcessingConditions TheprocessingconditionsofPEbucketscanalsoaffectthemechanicalandleakagepropertiesoftheproducts.Theprocessingparameterssuchastemperature,pressure,coolingrate,andshearstresscaninfluencethemolecularorientation,crystallization,andmorphologyofthePEmaterial,whichinturnaffecttheresistancetostressanddeformation.Forexample,highcoolingrateorinsufficientcoolingcancauseresidualstressesandresidualstraininthematerial,leadingtostresscrackingordeformationunderload.Similarly,highshearstressduringtheinjectionmoldingorblowmoldingprocesscaninducemolecularalignmentororientation,whichcanaffectthemechanicalpropertiesandbarrierpropertiesofthem