物流专业英语公开课获奖课件.pptx

Keypoint:theknowledgeofpackagingmaterials,packagingtechnologyandatrendtowardpackaginginnovationDifficultpoints:thetermsofpackagingmaterialsandpackagingtechnologyRequirementsPARTⅠPackagingmaterialsNewWords物流专业英语物流专业英语物流专业英语物流专业英语物流专业英语SentenceExplanations[Para.9]Itisamongthemostimportantandversatileofthehundredsofmercialplastics.
（聚乙烯）它是最重要并且用途最多商业用塑料。
[Para.11]HDPEisusedformostconsumerandindustrialblow-mouldedcontainers,andwhenstrengthisrequired.
在生活和工业中当需要一定强度容器时，用高密度聚乙烯来作为吹模容器。[Para.12]LDPE(Low-DensityPolyethylene)isthemostmonlyusedplasticpackaging,inparticularwhengoodclarityisdemanded.
低密度聚乙烯是一种常用塑料包装材料，尤其是规定透明包装时。
[Para.19]Purealuminiumisasoft,silverywhite,relativelylightmetal,whichconductsheatandelectricityeasily.
纯铝比较柔软，展现银白色，是相对较轻金属，它轻易导电和导热。[Para.13]Polypropylene(PP)isusedasaclear,whiteormetallisedfilm(metallisingiswherea99.9%purealuminumwireisheatedtoavaporandvacuumedontoaplasticorpapersurfacetoformalayerthinnerthanone1/1000ofamm).
聚丙烯作为白色金属薄膜材料（金属镀膜就是将铝加热成蒸汽然后覆盖在塑料或纸表面形成薄薄一层）。[Para.21]Glassisclear,rigid,chemicallyinert,heatresistant,resistanttointernalpressure,andapletebarriertowatervaporandgases.
玻璃是一种透明，坚硬、不活泼、不导热、能抵御内部压力不透水和气材料。
[Para.25]Claycoatingisaveryfinewashofclaythatfillsinanyunevennessonsomecartonboardsothatthesurfaceissmoothtoprinton.
粘土涂料是一种很好清洗材料，将它填在不平坦纸箱表面使表面光滑轻易印刷。Maincontents（1）PolyethyleneTerephthalate(PET)
PETislight,clearortransparentwithhighgloss,hardandwear-resistant.
（2）Polyethylene(Polythene)Polyethyleneisusuallytranslucent,toughandunaffectedbywaterandalargerangeofchemicals.（3）Polypropylene(PP)
PPisusedasaclear,whiteormetallizedfilm.Itcanalsobemoldedintobottles,jarsandcaps.
（4）Polyvinylchloride(PVC)
PVCisnaturallytransparent,heat-sensitive,hasexcellentresistancetooilsandalcohol,andexcellentstretchproperties,butasabarriertomoistureitcanbepoor.
（5）Polystyrene(PS)
PSisharderandmorebrittlethanpolyethyleneorpolypropylene,andhasasuperioropticalclarityandgoodchemicalresistancetofoodacidsandalkalis.
2.Multilayers
Frequentlydifferentmateria