水胶 热熔胶基础知识.ppt

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1、WaterBorne&HotMeltsAdhesives热熔胶和水基胶简介ADHESIVES粘合剂Waterborne水基胶---以水为载体Solventbased溶剂胶---以溶剂为载体HotMelts热熔胶---100%热可塑性固体ReactiveGlue反应型粘合剂機械粘合力(MechanicalAdhesion)粘合劑基材特性粘合力(SpecificAdhesion)基材粘合劑BondingMechanics(胶结原理)WBAFilm(水基胶膜)PenetratingLayer(渗透层)HMAFilm(热熔胶膜)

2、PorousSubstrate(多孔材质)PorousSubstrate(多孔材质)CHANGETOSPEEDOFSETINTERNALSTRENGTH內聚力(Cohesion)內聚力是物質本身的強度當胶水固化時其內聚力增加通常的希望是膠的內聚力與對基材的粘合力能高過基材本身的內聚力,因此能產生材破的現象(但並非所有狀況皆如此)INTERNALSTRENGTH(内聚强度)基材A基材BADHESIVE(胶层)材破現象(SubstrateFailure)胶基材A基材BWATERBORNEADHESIVES水基胶NaturalAd

3、hesive天然胶SyntheticAdhesive合成胶SYNTHETICADHESIVES(合成胶)EMULSION(乳液)SOLUTION(溶液)NATURALADHESIVES(天然胶)Starch(淀粉)Dextrin(糊精)AnimalGlue(动物胶)Casein(酪蛋白)NaturalRubberLatex(天然橡胶乳液)PolyvinylAlcohol聚乙烯醇PolyvinylAcetate(聚醋酸乙烯)Homopolymer(同聚物)Copolymer(共聚物)Acrylic(丙烯酸类)TYPESOFWBA

4、ADHESIVE水基胶形态NATURALADHESIVES天然胶STARCH-DERIVED(淀粉胶)PASTES(浆糊)DEXTRINS(糊精)JELLYGUMSPROTEINBASED(蛋白胶)ANIMALGLUE(动物胶)CASEIN(酪蛋白)ADVANTAGESOFSTARCH/DEXTRINS(淀粉/糊精的优点)LOWCOST(低成本)EASYCLEANUP(易清洗)NON-TOXIC(无毒)LONGOPENTIME(开放时间长)HIGHVISCOSITY/LOWSOLID(高粘度/低固含)LIMITATIONSO

5、FSTARCH/DEXTRINS(淀粉/浆糊的缺点)LIMITEDBONDING(粘力有限)POORSTABILITY(稳定性差)SLOWSETTING(慢干)BACTERIAPRONE(霉)RETURNTOWBASTATUSUSAGEOFSTARCH/DEXTRINS(淀粉/浆糊的应用)瓦楞纸板成型纸管成型纸张层合食物袋粘合香烟制作等等需要环保、安全的地方RETURNTOWBASTATUSSYNTHETICADHESIVES(合成胶)VINYLACETATEMONOMER(醋酸乙烯单体)HOMOPOLYMER----P

6、VAc(醋酸乙烯同聚物)INITIALIZE(反应)POLYVINYLACETATE(聚醋酸乙烯)SYNTHETICADHESIVES(合成胶)COPOLYMER----EVA(乙烯-醋酸乙烯共聚物)INITIALIZEVINYLACETATEMONOMER(醋酸乙烯单体)ETHYLENEMONOMER(乙烯单体)ETHYLENEVINYLACETATECOPOLYMER(乙烯-醋酸乙烯共聚物)SYNTHETICADHESIVES(合成胶)ADVANTAGES(优点)WIDERANGEOFADHESION(粘性宽)HIGH

7、MOLECULARWEIGHT(分子量高)VISCOSTY/SOLIDSNOTRELATED(粘度与固含量无关)FASTSET(快干)WATER/RESISTANTOREASYCLEAN(耐水，易清理)GOODMACHINING(上机性好)WIDEFORMULATINGLATITUDE(应用范围广)SYNTHETICADHESIVES(合成胶)LIMITATIONS(缺点)SPEEDVS.HOTMELTS(比热胶慢干)MUSTHAVEABSORBENTSURFACE(只适合有孔表面)CLEAN-UPVS.DEXTRINS(比

8、糊精难清洗)FINITESHELFLIFE(保质期有限)SYNTHETICADHESIVES(合成胶)USAGEOFSYNTHETICADHESIVES(合成胶的部分应用)瓦楞纸板成型纸管成型纸张/纸板层合信封制作购物袋粘合香烟制作卫生纸卷制作书本装订：皮壳/上衬/书脊再湿