Petroleum resin is used as a tackifier for EVA hot melt adhesive. EVA resin has excellent adhesion, softness, heating fluidity and cold resistance. It has large cohesive force, small surface tension and almost all the adhesion of materials. It has excellent chemical resistance, thermal stability, weather resistance and electrical performance. It is widely used in bookbinding, wood processing, plywood production, packaging, canning and footwear industry. Generally, EVA-based hot melt adhesives are used to blend EVAs of two grades or more as substrates. In addition to petroleum resins, inorganic fillers and antioxidants are added, and pigments such as TiO2 may be added according to user needs. , carbon black and so on. The petroleum resin has good compatibility with EVA having a low content of VA (vinyl acetate) and poor compatibility with EVA having a high VA content. The preparation process of the hot melt adhesive is as follows: the preparation process of the hot melt adhesive is as follows: EVA, talcum powder and antioxidant 1010 are sequentially added to the reaction kettle in a certain proportion, heated to melt, vigorously stirred and raised to a certain temperature, and then Adding a tackifier petroleum resin, stirring in a molten state for a period of time, and then adding DOP (dioctyl phthalate) to adjust the viscosity, the system is in a uniformly viscous molten state, and the solid obtained after cooling is hot melt. gum.
Petroleum resin has good adhesion. Adding petroleum resin to adhesives and pressure-sensitive adhesive tape can improve the adhesive strength, acid resistance, alkali resistance and water resistance of the adhesive, and can effectively reduce the production cost. Especially in hot melt adhesives and pressure sensitive adhesives, petroleum resins are used to enhance adhesion, elasticity and low temperature. The consumption of petroleum resin in China is at a stage of rapid development. In the field of hot melt adhesives and pressure sensitive adhesives, petroleum resins are gradually replacing terpene resins and rosin resins.

   2019-7-14