EVA hot melt gum, which is a solid soluble polymer that does not require a solvent and does not have water in it, is mainly composed of EVA resins formed by the copolymerization of polyethylene and ethylene acetate under high temperature and pressure. It determines the basic performance of hot melt gum. EVA burns high and is harmless to the human body.
High-temperature gum seal gum low-temperature gum EVA hot melt glue, at room temperature is a solid, heated to a certain temperature, dissolved and melted into a light brown translucent, sticky liquid flow. EVA plus adhesives that increase bond strength, adhesive viscosity and freezing speed regulators and a small amount of antioxidants, after melting at high temperatures, cool and solidify into massive solid glue. EVA is not heat-resistant, the softening point is low, and it must be heated when used to melt solid EVA resin. When heated to 80-100 °C, the colloid slowly moves, and as the temperature increases, the flow gradually accelerates. EVA colloidal curing process is done by cooling, is an excellent curing performance of the bond material, its drying speed is not comparable to any kind of bond material. And no need to dry or add other curing agents, fully adapt to the requirements of high-speed automation, so it has become one of the best adhesive materials for paperback wireless binding lines.

Points to note for using EVA hot melt glue:
The glue surface should not be too large, otherwise it will not be able to bond, because the glue curing time is only a few seconds at most. When using, store enough glue in advance and heat it more than 2 hours in advance so that it gradually becomes the desired fluid.
The fluidity of the colloid can be controlled by temperature. The temperature of Gaoze is low(thin), while the temperature is low(thick). In order to ensure the quality of the wireless glue, we must pay attention to the strict control of the temperature used in the processing of hot melt glue.
According to practice, the best bond temperature is 150 ~ 180 °C when coated on the rubber binder, but the preheating temperature of the preheating rubber pot is usually lower than the working temperature of 15 ~ 20 °C; The temperature of the secondary coating is about 30 °C higher than the first glue temperature. According to the thickness of the book core and the quality of the paper, the rubber temperature is also different. The book core is thick and the paper is good. The working temperature of the glue can be increased to 175. ~ 185 °C. The higher the colloidal temperature, the faster the flow. When the temperature exceeds 200 °C, the colloidal fluid begins to age in color, the length of solidification becomes longer, and the bond quality of wireless colloidal is reduced. When the temperature rises to 250 °C, the colloidal body ages., the color becomes darker, The viscosity is seriously reduced. The heat melt curing time is generally 7 to 13 seconds, and the cooling time is generally about 30 seconds. In a certain period of time, the colloid should be guaranteed to have good conditions for cooling and drying, in order to ensure that the book bond solid, beautiful and flat. In addition, the appropriate ambient temperature to ensure the normal use of adhesives, the temperature too low adhesives will be due to premature drying, adhesive bond and fall off. When binding fine books and periodicals, the adhesive fluidity used in bookbinding must be very good when binding to achieve full contact with the uneven surface of the sticky object. Choose binding glue, please buy regular manufacturers glue, make your books and periodicals more attractive.