Polyurethane composite adhesive can not be replaced

From the 1970s on, foreign countries began to study the two-component non-solvent J-type polyurethane adhesive. Since the 1980s, the United States, Italy, France, Germany and other countries have begun to use a large number of solvent-free adhesives, currently in major European countries. The use of the compound film adhesive has accounted for 70% to 90% of the total amount, and Europe and the United States have legislation to limit the use of solvent-based adhesives.
Most of the adhesives used in the domestic Food Packaging composite film industry are solvent-based. The use of organic solvent-based adhesives has the problem of volatilization of organic solvents. On the one hand, it causes the waste of solvents, and on the other hand it also brings about environmental pollution and damage to toxic substances.
The compounding process using solvent-free adhesives in the domestic laminating industry is relatively late. Therefore, the development of the solvent-free adhesives that are matched with them is also lagging behind. At present, there are more than 30 solvent-free composite equipments in China, which are mostly used for the packaging of some exported foods in order to meet the stringent residual solvent regulations in foreign countries. The solvent-free adhesives currently used by domestic laminating manufacturers are imported.
At present, due to cost reasons in China, solvent-free two-component polyurethane adhesives are far from universal, and solvent-based adhesives are mainly used. However, from a long-term point of view, solvent-free products have irreplaceable advantages and will continue to increase in the future.
Since the use of solvent-free polyurethane adhesive composite packaging materials by German HERBERTS company more than 20 years ago, due to its obvious economics, safety and environmental protection advantages, as well as the continuous development of laminating technology and equipment, it has been developed in Europe, etc. The country has rapidly increased from 10% of its usage 2O years ago to about 80% of the current level.
In recent years, with the vigorous development of the food industry, the industry for making two-component adhesives for polyurethane composite films has been continuously expanding. According to incomplete statistics, the current market capacity has reached about 40,000 tons/year. Now there are more than 100 manufacturers of polyurethane laminating adhesives in China, all of which are solvent-based adhesives.