Tackifier is one of the main auxiliaries of EVA hot melt adhesive. If only * basic resin melt under a certain temperature with the cohesive force, when the temperature drops, it is difficult to on paper were wetting and penetration, lose the ability to bond, is unable to achieve the bonding effect; tackifier can improve colloidal mobility and the adherend embellish wet, improve the bonding performance, achieve the desired bond strength. General tackifier rosin, modified rosin (138 or 145), C5 petroleum resin, C9 petroleum resin, terpene resin etc..