水膠 熱熔膠基礎(chǔ)知識(shí).ppt

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1、WaterBorne&HotMeltsAdhesives熱熔膠和水基膠簡(jiǎn)介ADHESIVES粘合劑Waterborne水基膠---以水為載體Solventbased溶劑膠---以溶劑為載體HotMelts熱熔膠---100%熱可塑性固體ReactiveGlue反應(yīng)型粘合劑機(jī)械粘合力(MechanicalAdhesion)粘合劑基材特性粘合力(SpecificAdhesion)基材粘合劑BondingMechanics(膠結(jié)原理)WBAFilm(水基膠膜)PenetratingLayer(滲透層)HMAFilm(熱熔膠膜)

2、PorousSubstrate(多孔材質(zhì))PorousSubstrate(多孔材質(zhì))CHANGETOSPEEDOFSETINTERNALSTRENGTH內(nèi)聚力(Cohesion)內(nèi)聚力是物質(zhì)本身的強(qiáng)度當(dāng)膠水固化時(shí)其內(nèi)聚力增加通常的希望是膠的內(nèi)聚力與對(duì)基材的粘合力能高過(guò)基材本身的內(nèi)聚力,因此能產(chǎn)生材破的現(xiàn)象(但並非所有狀況皆如此)INTERNALSTRENGTH(內(nèi)聚強(qiáng)度)基材A基材BADHESIVE(膠層)材破現(xiàn)象(SubstrateFailure)膠基材A基材BWATERBORNEADHESIVES水基膠NaturalAd

3、hesive天然膠SyntheticAdhesive合成膠SYNTHETICADHESIVES(合成膠)EMULSION(乳液)SOLUTION(溶液)NATURALADHESIVES(天然膠)Starch(淀粉)Dextrin(糊精)AnimalGlue(動(dòng)物膠)Casein(酪蛋白)NaturalRubberLatex(天然橡膠乳液)PolyvinylAlcohol聚乙烯醇PolyvinylAcetate(聚醋酸乙烯)Homopolymer(同聚物)Copolymer(共聚物)Acrylic(丙烯酸類)TYPESOFWBA

4、ADHESIVE水基膠形態(tài)NATURALADHESIVES天然膠STARCH-DERIVED(淀粉膠)PASTES(漿糊)DEXTRINS(糊精)JELLYGUMSPROTEINBASED(蛋白膠)ANIMALGLUE(動(dòng)物膠)CASEIN(酪蛋白)ADVANTAGESOFSTARCH/DEXTRINS(淀粉/糊精的優(yōu)點(diǎn))LOWCOST(低成本)EASYCLEANUP(易清洗)NON-TOXIC(無(wú)毒)LONGOPENTIME(開(kāi)放時(shí)間長(zhǎng))HIGHVISCOSITY/LOWSOLID(高粘度/低固含)LIMITATIONSO

5、FSTARCH/DEXTRINS(淀粉/漿糊的缺點(diǎn))LIMITEDBONDING(粘力有限)POORSTABILITY(穩(wěn)定性差)SLOWSETTING(慢干)BACTERIAPRONE(霉)RETURNTOWBASTATUSUSAGEOFSTARCH/DEXTRINS(淀粉/漿糊的應(yīng)用)瓦楞紙板成型紙管成型紙張層合食物袋粘合香煙制作等等需要環(huán)保、安全的地方RETURNTOWBASTATUSSYNTHETICADHESIVES(合成膠)VINYLACETATEMONOMER(醋酸乙烯單體)HOMOPOLYMER----P

6、VAc(醋酸乙烯同聚物)INITIALIZE(反應(yīng))POLYVINYLACETATE(聚醋酸乙烯)SYNTHETICADHESIVES(合成膠)COPOLYMER----EVA(乙烯-醋酸乙烯共聚物)INITIALIZEVINYLACETATEMONOMER(醋酸乙烯單體)ETHYLENEMONOMER(乙烯單體)ETHYLENEVINYLACETATECOPOLYMER(乙烯-醋酸乙烯共聚物)SYNTHETICADHESIVES(合成膠)ADVANTAGES(優(yōu)點(diǎn))WIDERANGEOFADHESION(粘性寬)HIGH

7、MOLECULARWEIGHT(分子量高)VISCOSTY/SOLIDSNOTRELATED(粘度與固含量無(wú)關(guān))FASTSET(快干)WATER/RESISTANTOREASYCLEAN(耐水，易清理)GOODMACHINING(上機(jī)性好)WIDEFORMULATINGLATITUDE(應(yīng)用范圍廣)SYNTHETICADHESIVES(合成膠)LIMITATIONS(缺點(diǎn))SPEEDVS.HOTMELTS(比熱膠慢干)MUSTHAVEABSORBENTSURFACE(只適合有孔表面)CLEAN-UPVS.DEXTRINS(比

8、糊精難清洗)FINITESHELFLIFE(保質(zhì)期有限)SYNTHETICADHESIVES(合成膠)USAGEOFSYNTHETICADHESIVES(合成膠的部分應(yīng)用)瓦楞紙板成型紙管成型紙張/紙板層合信封制作購(gòu)物袋粘合香煙制作衛(wèi)生紙卷制作書(shū)本裝訂：皮殼/上襯/書(shū)脊再濕