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1、ChapterForewordBook9PapermakingPart2,DryingSerieseditorsJohanGullichsen,HelsinkiUniversityofTechnologyHannuPaulapuro,HelsinkiUniversityofTechnologyBookeditorMarkkuKarlsson,MetsoOyjSeriesreviewerBrianAttwood,St.Anne'sPaperandPaperboardDevelopments,LtdBookreviewerJeffreyH.Pu
2、lkowski,BeloitCorporationPublishedincooperationwiththeFinnishPaperEngineers'AssociationandTAPPIForewordJohanGullichsenandHannuPaulapuroPAPERMAKINGSCIENCEANDTECHNOLOGYPapermakingisavast,multidisciplinarytechnologythathasexpandedtremendouslyinrecentyears.Significantadvancesh
3、avebeenmadeinallareasofpapermaking,includingrawmaterials,productiontechnology,processcontrolandendproducts.Thecomplexityoftheprocesses,thescaleofoperationandproductionspeedsleavelittleroomforerrorormalfunction.Modernpapermakingwouldnotbepossiblewithoutapropercommandofagrea
4、tvarietyoftechnologies,inparticularadvancedprocesscontrolanddiagnosticmethods.Notonlyhasthetechnologyprogressedandnewtechnologyemerged,butourunderstandingofthefundamentalsofunitprocesses,rawmaterialsandproductpropertieshasalsodeepenedconsiderably.Thevariationsintheindustry
5、抯heterogeneousrawmaterials,andthesophisticationofpulpingandpapermakingprocessesrequireaprofoundunderstandingofthemechanismsinvolved.Paperandboardproductsarecomplexinstructureandcontainmanydifferentcomponents.Therequirementsplacedonthewaytheseproductsperformarewide,variedan
6、doftenconflicting.Thoseinvolvedinproductdevelopmentwillcontinuetoneedaprofoundunderstandingofthechemistryandphysicsofbothrawmaterialsandproductstructures.Paperhasplayedavitalroleintheculturaldevelopmentofmankind.Itstillhasakeyroleincommunicationandisneededinmanyotherareaso
7、foursociety.Thereisnodoubtthatitwillcontinuetohaveanimportantplaceinthefuture.Papermust,however,maintainitscompetitivenessthroughcontinuousproductdevelopmentinordertomeettheever-increasingdemandsonitsperformance.Itmustalsobeproducedeconomicallybyenvironment-friendlyprocess
8、eswiththeminimumuseofresources.Tomeetthesechallenges,everyoneworkinginthisfieldmustseekso
