Lesson 31　Calendering

    Calenderingistheprocessofsqueezingasoftenedthermoplasticmaterialbetweentwoormorerollstoformacontinuousfilm.Theprocess,originallyadaptedfromtherubberindustry,isamajormethodofproducingplasticfilmandsheet.Thematerialgenerallyusedinthecalenderingprocessisflex......查看详细>>

标签:聚合物科学与工程

Lesson 32　Plastic Foam Molding

    Foamedplastics(alsocalledexpandedorcellularplastics)aremadebyaddingairorgastoaplasticresintoformasponge-likematerial.Moderndevelopmentsinplasticfoammoldinghaveplacedthisamongthemajorprocessingtechniquesoftheindustry.Resinscommonlyusedintheproductionofplas......查看详细>>

标签:聚合物科学与工程

Lesson 33　Thermoforming

    Thermoformingplasticsheetmaterialinshortthermoformingisoneofthemajorprocessingtechniquesoftheplasticsindustryandalsooneoftheoldest.Sinceearlyattempts,abouttheturnofthecentury,toshapecellulosicsheet,theprocesshasgrownrapidly.Muchofthegrowthisduetoinnovativ......查看详细>>

标签:聚合物科学与工程

Lesson 34　Rubber Mixing

    Mixing,beingthefirststepinasequenceofoperations,determinestheefficiencywithwhichsubsequentprocessesmaybecarriedoutandexertsaconsiderableinfluenceonproductperformance.Adequateandconsistentmixingisaprerequisiteforsuccessfulmanufacture.Thetypeofsystemusedfor......查看详细>>

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Lesson 35　Rubber Extrusion and Continuous Mixing

    Extrudersarewidelyusedintherubberindustryinavarietyofapplications.Inlargemixingsystems,dumpextrudersareusedtoacceptthebatchofmaterialfromaninternalmixerandtogiveitashapesuitableforfurtheroperations.Againinthemixingsystem,mixingextrudersorcontinuousmixersa......查看详细>>

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Lesson 36　Fiber Spinning of Polymer

    Thefirsteffortsofmanufacturingartificialfiberswereconnectedwiththeattemptstoutilizenaturalpolymers,primarilycelluloseandcasein,asrawmaterials.Althoughsyntheticpolymerswerealreadyknownatthattime,theywereconsideredmerelyascuriosawithoututilitarianvalue.Macr......查看详细>>

标签:聚合物科学与工程