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羽绒的物理性能与服用性研究(英文).docx

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羽绒的物理性能与服用性研究(英文) ResearchonthePhysicalPerformanceandWearabilityofDown Introduction Downisanaturalmaterialthathasbeenwidelyusedinclothingandbeddingproductsduetoitsexcellentthermalinsulationproperties.Theuseofdownproductshasincreasedsignificantlyinrecentyears,anditisnecessarytoconductresearchonthephysicalperformanceandwearabilityofdowntoimproveproductqualityandusersatisfaction.Thispaperwilldiscussthephysicalpropertiesofdown,suchasthermalinsulation,moistureabsorption,andventilation,aswellasitswearability,includingcomfort,durability,andmaintenance. PhysicalPerformanceofDown ThermalInsulation Thethermalinsulationofdownisoneofitsmostimportantpropertiesandisdeterminedbyitsabilitytotrapair.Themoreairadownproductcantrap,themoreinsulationitprovides.Thethermalinsulationpropertyofdownisusuallydefinedbyitsfillpower,whichisthemeasureofthevolumethatoneounceofdownoccupies.Higherfillpowerdownhasmoreloftandismoreinsulatingthanlowerfillpowerdown.Downproductswithahigherfillpowerarealsomoreexpensivethanthosewithlowerfillpower.Thethermalinsulationofdowncanbeaffectedbymoisture,compression,andwear. MoistureAbsorption Downishygroscopic,meaningitcanabsorbmoisturefromthesurroundingenvironment.Itcanabsorbupto30%ofitsweightinwaterbeforelosingitsinsulatingproperties.Moisturecanreducetheloftandthermalinsulationofdownbydecreasingtheamountofairitcantrap.Therefore,downproductsshouldbeprotectedfrommoisturetomaintaintheirthermalinsulation.Downneedstobedriedthoroughlyonceitgetswettomaintainitsinsulatingproperties. Ventilation Ventilationistheabilityofamaterialtoallowairtocirculatethroughit.Goodventilationisessentialfordownproductstomaintaintheirthermalinsulationandpreventthebuild-upofmoistureinsidetheproduct.Downproductsaredesignedtotrapairtoprovideinsulation,buttheyalsoneedtobebreathabletoallowairtocirculate.Theadditionofbreathablefabricsandmeshpanelsindownproductscanhelpensuregoodventilation. WearabilityofDown Comfort Thecomfortofdownproductsisdeterminedbythequalityofthedownusedandthedesignoftheprod