C5 petroleum resin has low production cost and large use. It can be made into block or granular form and used as tackifier in pressure-sensitive adhesives. Hot melt adhesive is an adhesive that is heated and melted to generate fluidity, coated on the object to be bonded, and solidified and bonded after cooling.

EVA has excellent adhesion, softness, heating fluidity and cold resistance, its cohesion is large, the melting surface tension is small, and it has adhesion to almost all substances, chemical resistance, thermal stability, weather resistance and electrical properties. Excellent, widely used in book binding, wood processing, plywood production, packaging, canning, shoemaking, etc.

Usually, the hot melt adhesive with EVA as the base material needs to be blended with two or more grades of EVA as the base material. In addition to petroleum resin, inorganic fillers, antioxidants, and pigments can also be added according to user needs, such as: TiO2, carbon black, etc.

Petroleum resin has good compatibility with EVA with low VA (vinyl acetate) content, but has poor compatibility with EVA with high VA content.

The preparation process of this hot-melt adhesive is as follows: add EVA, talc, and antioxidant 1010 to the reaction kettle in sequence in a certain proportion, heat to melting, stir vigorously and raise to a certain temperature, then add tackifier petroleum resin, stir for a period of time in the molten state, and then add DOP (dioctyl phthalate) to adjust the viscosity to moderate. At this time, the system is in a uniform and viscous molten state. After cooling, a yellow solid is obtained, which is a hot melt adhesive.