工艺技术_不干胶的动作原理

不乾胶的定义DefinitionofPSA 拥有持久的高黏度Aggressivelyandpermanentlytacky应用时只需用手或手指施压Adhereswithfingerorhandpressure不需水 溶剂或加热过程Requiresnoactivationbywater solventorheat有牢靠的粘黏力Exertsastrongholdingforce有足够的内聚力和弹性Hassufficientcohesivenessandelasticity PressureSensitiveTapeCouncil 不干胶的好处AdvantagesofPSA抯 不须涂布 混合等预处理步骤Readytouse nomixingorbrushingisrequired一贯性的胶量Consistentamountofadhesive使用上方便 快捷Lessmessythansuperglueandcontactcement可以模切成各种形状Canbediecutintospecificshapes持久的黏弹性可以避免脆化 断裂等现象Staysviscoelasticwhicheliminatesbrittlefracturepossiblewithepoxies hotmeltsandcyanoacrylates无臭 无味和溶剂Lessodorduringuse 粘黏力和内聚力AdhesionandCohesion 内聚力Cohesion材料自身的力量Internalstrengthofmaterial 粘黏力Adhesion存在两种表面之间的力量Forcebetweendissimilarsurfaces 黏性与剪力ViscosityandShearStrength 低黏性材料LowViscousMaterials e g Water水 高流动性Floweasily不须施加压力Donotneedrubdownpressure无剪力Noshearstrength 高黏性材料HigherViscousMaterials e g Oil Honey油 蜂蜜 只需少许压力便可以流动Requiremoderatepressuretoflow低剪力Littleshearstrength无法持久承受荷重Failundercontinuousshearload 黏性与剪力ViscosityandShearStrength 黏弹性材料Visco elasticMaterials e g PressureSensitiveAdhesive不乾胶 使用时须施加压力Requireconsiderablerub downpressure需驻留时间发挥效能Requiredwelltime有优良的剪力Wellbalancedshearproperties 非黏性材料Non viscousMaterials e g curedadhesives作用后的粘黏剂 无流动性Noflowcharacteristics无黏性Notsticky有极高的剪力Maximumshearstrength 黏性和黏弹性ViscosityandVisco elasticity 粘黏性AdhesionProperties 内聚力特性CohesionProperties 不乾胶的运作原理HowPSABonds 不乾胶具有流动性 能与背材紧密接合AdhesivemustFLOWtoCONTACTsubstrate不乾胶与背材间的相互作用Adhesive SubstrateINTERACTION 初期与最终粘黏力InitialandUltimateAdhesion 初期粘黏力无驻留时间InitialAdhesionNoDwellTime 最终粘黏力驻留时间 UltimateAdhesion72小时 70癈 软性与韧性的不乾胶SoftandFirmAdhesives 韧性不乾胶FirmAdhesive较小的初期接触面积Lessimmediatecontact较低的初期粘黏力Lowinitialbondstrength须较长的驻留时间Requireslongerdwelltime软性不乾胶SoftAdhesive良好的初期接触面积Goodimmediatecontact较高的初期粘黏力Highinitialbondstrength较短或不须驻留时间Needslittleornodwelltime 软性与韧性的不乾胶SoftandFirmAdhesives 驻留时间DwellTime AdhesionLevel 粘黏力 软性胶Soft 韧性胶Firm 如何取得最大的接触面积MaximisationofContactArea 时间Time胶需要时间流动Foradhesivetoflow温度Temperature高温可以减低胶的黏性Decreaseadhesiveviscosity促进胶的流动性Acceleratesadhesiveflow促进胶的Improvewetting压力Pressure促进胶的流动性Acceleratesadhesiveflow促进胶的Improvessurfacewetting避免汽泡的产生Eliminatestrappedair 表面能SurfaceEnergy 高表面能HighSurfaceEnergy 容易黏接Easy to adhere 金属Metals聚碳Polycarbonate聚酯Polyester聚氯乙烯PVC聚氨Polyurethane丙烯酸Acrylic PolyvinylAcetate聚乙烯Polyethylene聚苯Polystyrene聚丙烯Polypropylene聚氟Teflon 低表面能LowSurfaceEnergy 难以黏接Hard to adhere 表面结构与不乾胶的厚薄度SurfaceTexture 粗糙的表面TexturedSurface 薄ThinAdhesive有限度的接触LimitedContact 厚ThickAdhesive最大接触面积MaximumContact 不乾胶的化学构成PressureSensitiveAdhesive 橡胶类RubberAdhesives天然胶NaturalRubber人造胶SyntheticRubber丙烯酸类AcrylicAdhesives纯丙烯酸类StandardAcrylic改良丙烯酸类ModifiedAcrylic矽胶类SiliconeElastomerAdhesives RubbervsAcrylicAdhesivesBondBuildUp 驻留时间DwellTime 丙烯酸类Acrylic AdhesionLevel 粘黏力 RubbervsAcrylicAdhesivesBondBuildUp 驻留时间DwellTime 丙烯酸类Acrylic AdhesionLevel 粘黏力 橡胶类Rubber 丙烯酸胶的化学AcrylicAdhesiveChemistry 交连结构Crosslinking增粘处理Tackification不同的聚合物基体Variouspolymerbackbones IncreasingCrosslinking ImprovestemperatureresistanceProvidesshortdwellrepositionabilityonplasticsIncreasessolventresistanceImprovesdiecuttingandhandling Crosslinking Tiepolymerstrandstogether IncreasingTackifier IncreasesadhesionDecreasestemperatureresistanceDecreasessolventresistanceIncreasessoftness oozing Tackification Addingresinstoincreasetheadhesiontolowsurfaceenergymaterials StaticShearArea 0 5 X1 Load 1 000g roomtemp 500g 158deg F CrosslinkingvsShear 200 220 100 4009502 9505 200MP1 0006 00010 000 204 00010 000 CrosslinkingvsShear 310 300 350 300LSE1 0001 0002 500 10102 500 StaticShearArea 0 5 X1 Load 1 000g roomtemp 500g 158deg F ASTMD3330 90degree 72hourroomtempdwell Typicalvalues notforspecificationpurposes AdhesiveStainlessABSPolypropylene 2mil Steel 100927313 200MP1035722 350636139 300LSE737270 300728352 AdhesivePeelPerformance 粘接不牢的各种因素WhatCausesBondFailure 不乾胶与背材的相互作用Adhesive SubstrateIncompatibilty表面结构TexturedSurface表面污染SurfaceContamination离型剂MoldRelease 尘埃DustParticles增塑剂的迁移PlasticiserMigration软质聚氯乙烯FlexiblePVC 橡胶Rubber残留水份OutgassingofMoisture聚碳Polycarbonate 表面污染SurfaceContamination 油脂 指纹 水 油和注塑用的离型剂Grease FingerPrint Moisture Oil MoldReleaseChemicals防止胶与背材接合Createabarrierbewteenadhesiveandsubstrate尘埃 石粉 纤维持等Dust Talc Fiber ParticleContamination影响胶的黏性Affectstackinessofadhesive减少有效的接触面积Reducecontactsurfacearea 剥离力与剪力的测试PeelvsShearTest 剥离力Peel衡量measures粘黏力Adhesion 剪力Shear衡量measures内聚力Cohesion 剪力ShearStrength ShearmeasuresCohesion theinternalstrengthofadhesiveTypicallySoftAdhesive LowShearFirmAdhesive HighShearThickAdhesive LowShearThinAdhsive HighShear 静态剪力StaticShearStrength TimeRequiredtoshearadefinedareaoftapefromatestpanelatconstantloadVariablesLoadTestPanelMaterialandSurfaceConditionsTemperature Load Tape TestPanel 动态剪力DynamicShearStrength ForceRequiredtoshearastandardareaoftapefromatestpanelatconstantspeedVariableSpeedTestPanelMaterialandSurfaceConditionsTemperature 剥离力PeelStrength PeelmeasuresAdhesion thebondingstrengthofadhesiveTypicallySoftAdhesive HighPeelFirmAdhesive LowPeelThickAdhesive HighPeelThinAdhsive LowPeel 静态剥离强度StaticPeelAdhesion TimeRequiredtopeeladefinedlengthoftapefromatestpanelatspecif