水胶&热熔胶基础知识.ppt
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1、Water Borne&Hot Melts Adhesives热熔胶和水基胶简介,ADHESIVES 粘合剂,Water borne 水基胶-以水为载体 Solvent based 溶剂胶-以溶剂为载体 Hot Melts 热熔胶-100%热可塑性固体 Reactive Glue 反应型粘合剂,機械粘合力(Mechanical Adhesion),粘合劑,基材,特性粘合力(Specific Adhesion),基材,粘合劑,Bonding Mechanics(胶结原理),WBA Film(水基胶膜),Penetrating Layer(渗透层),HMA Film(热熔胶膜),Porous Su
2、bstrate(多孔材质),Porous Substrate(多孔材质),CHANGE TO SPEED OF SET,INTERNAL STRENGTH,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),INTERNAL STRENGTH(内聚强度),材破現象(Substrate Failure),胶,基材A,基材B,WATERBORNE ADHESIVES水基胶,Natural Adhesive天然胶Synthetic Adhesive合成胶,SYNTHETI
3、C ADHESIVES(合成胶),EMULSION(乳液),SOLUTION(溶液),NATURAL ADHESIVES(天然胶),Starch(淀粉)Dextrin(糊精)Animal Glue(动物胶)Casein(酪蛋白),Natural Rubber Latex(天然橡胶乳液),Polyvinyl Alcohol聚乙烯醇,Polyvinyl Acetate(聚醋酸乙烯)Homopolymer(同聚物)Copolymer(共聚物)Acrylic(丙烯酸类),TYPES OF WBA ADHESIVE水基胶形态,NATURAL ADHESIVES天然胶,STARCH-DERIVED(淀粉胶
4、)PASTES(浆糊)DEXTRINS(糊精)JELLY GUMSPROTEIN BASED(蛋白胶)ANIMAL GLUE(动物胶)CASEIN(酪蛋白),ADVANTAGES OF STARCH/DEXTRINS(淀粉/糊精的优点),LOW COST(低成本)EASY CLEAN UP(易清洗)NON-TOXIC(无毒)LONG OPEN TIME(开放时间长)HIGH VISCOSITY/LOW SOLID(高粘度/低固含),LIMITATIONS OF STARCH/DEXTRINS(淀粉/浆糊的缺点),LIMITED BONDING(粘力有限)POOR STABILITY(稳定性差)
5、SLOW SETTING(慢干)BACTERIA PRONE(霉),RETURN TO WBA STATUS,USAGE OF STARCH/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,RETURN TO WBA STATUS,SYNTHETIC ADHESIVES(合成胶),VINYL ACETATE MONOMER(醋酸乙烯单体),HOMOPOLYMER-PVAc(醋酸乙烯同聚物),INITIALIZE(反应),POLYVINYL ACETATE(聚醋酸乙烯),SYNTHETIC ADHESIVES(合成胶),COPOLY
6、MER-EVA(乙烯-醋酸乙烯共聚物),INITIALIZE,VINYL ACETATE MONOMER(醋酸乙烯单体),ETHYLENE MONOMER(乙烯单体),ETHYLENE VINYL ACETATE COPOLYMER(乙烯-醋酸乙烯共聚物),SYNTHETIC ADHESIVES(合成胶),ADVANTAGES(优点)WIDE RANGE OF ADHESION(粘性宽)HIGH MOLECULAR WEIGHT(分子量高)VISCOSTY/SOLIDS NOT RELATED(粘度与固含量无关)FAST SET(快干)WATER/RESISTANT OR EASY CLEAN
7、(耐水,易清理)GOOD MACHINING(上机性好)WIDE FORMULATING LATITUDE(应用范围广),SYNTHETIC ADHESIVES(合成胶),LIMITATIONS(缺点)SPEED VS.HOT MELTS(比热胶慢干)MUST HAVE ABSORBENT SURFACE(只适合有孔表面)CLEAN-UP VS.DEXTRINS(比糊精难清洗)FINITE SHELF LIFE(保质期有限),SYNTHETIC ADHESIVES(合成胶),USAGE OF SYNTHETIC ADHESIVES(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
8、购物袋粘合香烟制作卫生纸卷制作,书本装订:皮壳/上衬/书脊再湿标签纸箱/纸盒成型贴标覆膜木材粘接喷胶棉/静电植绒,General Properties of WBA(水基胶一般性能),Wet Tack(湿粘性)Stickiness,strength of a wet adhesive between two surfaces(湿态下的粘性,强度)Tack Build-up(粘力形成过程)Speed at which an adhesive increases its wet tack as it dries(随胶干燥形成粘性的过程)Setting speed(固化速度)Time it take
9、s for an adhesive to become stronger than the surface it is bonding by drying.(胶产生足够强度所需时间),General Properties of WBA(水基胶一般性能),Open time(开放时间)Time which the adhesive has useful tack/bonding capability(胶具有粘性/结合性的最长时间)Filminess(膜性能)Resistance of wet adhesive to horizontal shear(胶膜抗剪切能力)Wettability(润湿性
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