Development of polyurethane adhesive market for th

Development of polyurethane adhesive market for packaging

at present, although the general development trend of adhesive is non organic solvation, polyurethane solvent adhesive can not fully reach the solvent level at present due to its excellent process and bonding performance, especially the performance of non organic solvent adhesive. Solvent polyurethane adhesive will still exist for a long time

in Europe, the United States, Japan and other developed countries or regions, the amount of solvent based polyurethane adhesive in the field of dry compounding is more than 60%. Since 1980, China has introduced Japanese composite film production technology and equipment. Up to now, it is estimated that there are more than 300 dry composite film production lines, and the usage of polyurethane adhesive is more than 35000 tons/year. The first solvent based two-component polyurethane adhesive used in the composite packaging industry in China was produced by Beijing Institute of chemical industry in 1984, which introduced technology from the former Federal Republic of Germany. The main agent product is polyurethane adhesive with low viscosity and high solid content (75%). When the load can no longer rise, various types of domestic composite equipment entered the market. Domestic manufacturers and research institutes have successively developed various suitable solvent based two-component polyurethane adhesives, mainly products with low solid content (15%-50%) and high viscosity

generally speaking, products with low viscosity and high solid content can be coated at a high speed at a concentration of more than 40% because of their low viscosity, low solvent consumption, environmental friendliness, low comprehensive cost, high transparency and good strength of their products, but they have high requirements for equipment, process and raw material control, and are prone to various defects such as poor strength when applied improperly. This product is suitable for composite manufacturers with a certain scale. Low solid content (15%-50%), high viscosity products have high initial viscosity, good adaptability to domestic compounding machines, but the transparency is slightly poor, too many solvents are used, which is not friendly to the environment, and the comprehensive cost is high. These products are suitable for medium and small-scale compounding manufacturers

at present, from the perspective of China's overall adhesive market, it has the following characteristics:

multinational companies not only promote their functional and non organic solvent products in China to seize the high-end market, but also directly sell or cooperate in the production of ordinary polyurethane drying agent to compete for the general market. After years of digestion, absorption and independent development, many domestic enterprises have mastered the production technology of ordinary polyurethane adhesive and produced it. The current output is estimated to be 30000 tons/year, with about 30 varieties. These manufacturers have become the main raw material suppliers. Some domestic companies with strong technical capabilities have been able to produce high-performance functional or non organic solvent products. Domestic production of functional solvent based adhesives, For example, Claire Perry, the UK Minister of energy and clean development, said: "Seek innovative solutions to reduce our use of harmful plastics. Products such as high-temperature cooking type, medium resistant type, and slippery resistant type have been introduced one after another, making up for the gap. In terms of non organic solvent based polyurethane adhesives, although new products have been launched, there is a certain gap between the process operation and application performance of solvent based products, and the cost is also at a disadvantage. The application and promotion situation is still far behind that of developed countries 。

with China's entry into WTO and the improvement of domestic environmental protection awareness, technical barriers in environmental protection and other aspects will be highlighted. Composite film manufacturers and adhesive manufacturers should work together to improve the technical level of composite products

comprehensively investigate and analyze the current domestic polyurethane adhesive industry. The next development trend of polyurethane adhesive is: the production technology of domestic general composite solvent based two-component polyurethane adhesive has been completely "white pollution", which has a serious impact on the ecological environment. Some manufacturers have mature processes and stable quality, and can completely replace imported products; Some domestic manufacturers have passed the production technology of solvent based two-component polyurethane adhesive for cooking resistant composite. Years of promotion and application have shown that the product quality is stable and the price is reasonable, which can replace imported products; Products such as special glue for aluminizing film and functional glue for anti slippery agent have strong pertinence and outstanding performance, which should be vigorously promoted