MEGADYNE，DONGIL环形无缝皮带，UNITTAEV8YU橡胶同步带CLASSIFICATI***：MegalinearTimingBeltsaremanufacturedinthermoplasticpolyurethane,withsingleparallelsteelco***.Thistypeofbelts,developedbyourResearch&Development,offersgoodrunningcharacteristicsandhightractionloads.Theyareespeciallysuitedforpowertran***issionandconveyingwithhighloadsandspeeds.Theadditionofanyloncoatingontheteethduringproductionenhancestherunningpropertiesforspecificapplicati***andreducesthenoiseduetoalowerfrictionalcoefficient.Anextrathicknessofspecialcoatingisalsopossibleonthebackofthebeltofferingextraprotectionagainstaggressiveorhe***yproducts.1)Thebodyofthebeltsiswhitethermoplasticpolyurethane92ShA,characterizedbyhighlevelsofwearresistanceeveninthepresenceofshockandsurgeloading.2)HighstrengthSandZparallelzinkedsteeltensionmembersallowhighbreakingloadandextremelylowelongation.Thecombinationofthesehighgradematerialsimprovesbeltperformanceswhichcanbesummarisedasfollows:•exceptionalresistancetoabrasionandtoothshear•lowcoefficientoffriction•highflexibility•ozoneandtemperatureresistance(-30°C/+80°C)•oil,greaseandgasolineresistanceBODYMEGADYNEbeltsaremanufacturedwithwhitethermoplasticPolyurethane92ShAasstandard.Specialcompounds(differenthardnesses,specialproperties)are***ailableonrequest.HereundersomePUcharacteristics:WaterNoprobleminnormalorseacleanwater,atroomtemperature.Over60ºCthereisafastdecrementofbreakingstrength.AcidsInaciddilutedproporti***,atroomtemperature,thisPUismoderatelyattacked.Inhighconcentrationacidsoluti***,thisPUhasaveryshortlifespan.Over50ºC,acidsarealwaysdangerousforThermoplasticPU.AlkalisInalkalisdilutedproporti***,atroomtemperature,thisPUismoderatelyattacked.Inhighconcentrationacidsoluti***,thisPUhasaveryshortlifespan.DONGILOver50ºC,acidsarealwaysdangerousforThermoplasticPU.SolventsThermoplasticPUisinsolubleinthegreaterpartofsolvents.Onlytheverypolarsolvents(sameastetrahydrofuran,dimethylformamide,n-methylpyrrolidone)candissolveortightdamagePU.TheEstersortheKet***(sameasethylacetateormethylethylketene)canusuallyproduceabulge,decreasingmechanicalcharacteristics.TheHydrocarb***aromaticandtheHydrocarb***aliphaticproduceveryhighbulge.Alltheeffectsincreasebyincreasingtemperature.OilsPUhasahighresistancetomineralpureoils(lubrificants,engineoils,combustibleoils).Usually,highperformancesynteticoils,duetospecialadditivescontained,canbeincompa1)