This kind of adhesive has excellent performance, mature process and many varieties, but the toxicity is large and the cost is high, and a large number of solvents are discharged to pollute the environment.Composite materials for a long time, may hydrolyze, release a carcinogenic substance TDA(diacetic acid), serious harm to the health of operators with the enhancement of environmental awareness, the use of this kind of adhesive is declining.Now developed countries in Europe and the United States using this kind of adhesive packaging from 10 years ago 80% sharply reduced to the present 30% alcohol-soluble polyurethane adhesive advantage is to use industrial alcohol as a solvent production cost low health performance is good to workers harmless to the environment pollution-free Its disadvantage is intolerance to high temperature, can not package corrosive products, the production process of the mix of glue can only be used up on the same day, such as the remaining can only be diluted and preserved, the next day when the production, as a diluent, if the glue has become white or thickened can not be used Water-soluble or water-dispersible solvent based adhesive called waterborne polyurethane adhesive, its advantage is water instead of organic solvent, there is no potential danger of combustion explosion, and low cost But the performance of this adhesive is poor, the adhesive is not good for the base material, because the surface tension of the water is 72mN/m, and the surface tension of the base material is only 40mN/m, the difference is large, incompatible, and the adhesive force is not high In addition, the heat capacity of water is large, the need to dry, so as to consume more energy, the cost is increased, the production speed is low, some performance is poor in solvent-based adhesives Medical composite adhesive to the solvent-free direction, solvent-free adhesive is basically composed of two-component polyurethane adhesive, the main agent and curing agent at room temperature high viscosity, with liquidity, composite agent and curing agent proportionally mixed, after heating roller coated to the base material Because there is no organic solvent, the cost is reduced, there is no pollution to the environment caused by the volatilization of organic solvent, it eliminates the huge drying, heating and air exhaust gas discharge device, reduces the production speed of energy consumption products without residual solvent damage, improves the maintenance cost, low efficiency, and has a promising application prospect in the field of drug packaging.

Sinograce chemical produces all kinds of water-based glue, acrylic glue, water-based polyurethane glue, welcome to consult, the company email is sales@sinogracechem.com