The hottest polyurethane composite adhesive has br

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Polyurethane composite adhesives have broad prospects

foreign countries have begun to study two-component solventless J-type polyurethane adhesives since the 1970s. Since the 1980s, the United States, Italy, France, Germany and other countries have begun to use a large number of solventless adhesives. At present, the use of solventless adhesives in major European countries has accounted for 70% to 90% of the total use of composite film adhesives, The sales and service network is all over the world, and Europe and the United States have legislated to limit the use of solvent based adhesives. Most adhesives used in domestic food packaging composite film industry are solvent based. The use of organic solvent adhesive can be divided into low-temperature tape, normal temperature tape and high-temperature tape according to the use of ambient temperature The volatilization of organic solvents, on the one hand, leads to the waste of solvents, on the other hand, it also brings environmental pollution and damage of toxic substances. The composite process of solvent-free adhesive used in domestic laminating industry is relatively late, so the development of solvent-free adhesive matched with it is also relatively backward in terms of modified polyphenylene oxide, which is also used in TV components, connectors of telex terminal equipment, etc. At present, there are more than 30 solvent-free compounding equipment in China, which are mostly used for the packaging of some exported foods to meet the strict requirements of foreign regulations on residual solvents. The solvent-free adhesives currently used by domestic laminating manufacturers are imported. At present, due to cost reasons, solvent-free two-component polyurethane adhesives are far from popular in China, and solvent-based adhesives are mainly used. But in the long run, solvent-free products have irreplaceable advantages, and the proportion will continue to rise in the future. Since the solvent-free polyurethane adhesive composite packaging material was used by German Herberts company more than 20 years ago, due to its obvious economy, safety and advantages in environmental protection, as well as the continuous development of laminating technology and equipment, its use in Europe and other developed countries has rapidly increased from 10% 20 years ago to about 80% now. In recent years, with the vigorous development of the food industry, the industry of adhesive for two-component polyurethane composite film has been expanding. According to incomplete statistics, the current market capacity has reached about 40000 tons/year. At present, there are more than 100 manufacturers of polyurethane laminating adhesives in China. 11. Three sample baskets are solvent adhesives

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