本論文主要探討聚醋酸乙烯酯(簡稱EVA)系熱熔膠,通常以180~200℃的高溫操作加工使用。現鑒於能源取得不便,故計畫研究一能以較低加工溫度(約140~150℃)就能操作使用的熱熔膠取代之,但其機械強度特性需與原高溫加工的熱熔膠相近。 本研究發現,EVA的MI值越高,以DSC設備測得的熔解熱值會越低,但其機械強度特性卻隨之越差。而當以低熔解熱的EVA當配方基礎時,調整EVA與增黏劑的添加比例後,實驗得知兩者的比例不同對機械強度特性並沒有太大的影響。但最後改以添加結晶蠟的方式,當固定EVA的比例及改變蠟與增黏劑的比例後,在結晶蠟添加量為10%的配方時,可以得到機械強度特性的最大值,而其熔解熱亦會低於其他較低MI值之EVA配方的產品。
The paper is concerned about Ethylene Vinyl Acetate Copolymer(abbr. EVA) base hot melt adhesives (HMA), which is applied at high temperature between 180 to 200℃. Regarding to the short of energy, this study ‘s main goal is to develop a new hot melt adhesives applied by lower temperature (i.e. 140~150℃) and which can hold the similar prosperities as the traditional high-temperature-applicative HMA. This study presents that the higher melt index (MI) of the EVA, the lower of melting enthalpy and total strength. The strength is similar while we adjust the relative percent of the low melting enthalpy and tackifier; when we fix the ration of low-temperature-applicative HMA, introducing the crystalline wax and change the ratio of tackifier and wax. The maximum strength is obtained by adding10% crystalline wax, which has the lowest MI value of all low-temperature-applicative HMA products.