Shandong Landun Petroleum Resin Co., Ltd.
Add：Guyun Industrial Park, Liaocheng City, Shandong Province
Application of Petroleum Resin in Hot Melt Adhesive
The main components of hot-melt pressure-sensitive adhesives are thermoplastic elastomers, tackifying resins, softeners, anti-aging agents and other additives. Petroleum resins are used as tackifiers for hot-melt adhesives. According to the product application substrate, they are divided into: EVA (ethylene- Vinyl acetate copolymer), SIS (styrene-isoprene-styrene block copolymer), SBS (styrene-butadiene-styrene block copolymer), etc. These substrates can be used alone, most In this case, it is used as a hot melt adhesive base material after blending.
1.1 Hot melt adhesive with EVA as the base material
EVA has excellent adhesion, flexibility, heating fluidity and cold resistance, its cohesive force is large, the melting surface tension is small, it has adhesion to almost all substances, chemical resistance, thermal stability, weather resistance and electrical properties Better, widely used in book binding, wood processing, plywood production, packaging, canning, shoemaking, etc. Generally, hot melt adhesives with EVA as the base material need to blend more than two grades of EVA as the base material. In addition to petroleum resin, inorganic fillers and antioxidants are also added. Pigments can 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 poor compatibility with EVA with high VA content. The preparation process of this hot melt adhesive is as follows: The preparation process of this hot melt adhesive is as follows: add EVA, talcum powder, and antioxidant 1010 into the reactor in a certain proportion, heat to melt, stir vigorously and raise to a certain temperature, then Add tackifier petroleum resin, stir for a while in the molten state, and then add DOP (dioctyl phthalate) to adjust the viscosity to be moderate. At this time, the system is in a uniform and viscous molten state. After cooling, a yellow solid is obtained, which is hot Melt glue.