Introduction of low price hot melt adhesive products related little knowledge about resin!
Low price hot melt adhesive products are plastic adhesives. Within a certain temperature range, its physical state changes with temperature, while its chemical properties remain unchanged. It is non-toxic and tasteless, and is an environmentally friendly chemical product. So do you know the resin knowledge of Low price hot melt adhesive products? Let's follow the editor to understand it briefly!
The basic resin of Low price hot melt adhesive products is the copolymerization of ethylene and vinyl acetate under high temperature and high pressure, namely EVA resin. This resin is the main component for making Low price hot melt adhesive products. The ratio and quality of the basic resin determine the basic properties of Low price hot melt adhesive products, (such as adhesive bonding ability, melting temperature, and bonding strength). VA content is 18-33, melt index (MI) is 6-800, low VA content, the higher the crystallinity, the higher the hardness, under the same circumstances, the higher the VA content, the lower the crystallinity, the greater the elasticity, and the choice of EVA melt index is also very important. The smaller the melting finger, the poorer the fluidity, the higher the strength, and the higher the melting temperature is, and the wettability and permeability of the adherend is also poor. On the contrary, if the melting finger is too large, the melting temperature of the glue is low, and the fluidity is better but the bonding strength is reduced. The choice of its additives should choose the appropriate ratio of ethylene and vinyl acetate.
In summary, it is a brief introduction to the resin knowledge of Low price hot melt adhesive products.