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Alcohol soluble polyurethane adhesive for green packaging

development prospect of alcohol soluble polyurethane adhesive solvent based adhesives used in plastic flexible packaging are inevitable trends to reduce the toxicity of adhesives and use environmental friendly solvents in order to meet the requirements of social development

at present, the two-component polyurethane adhesive with ethyl acetate as solvent is widely used in China. Although its bonding performance can meet the requirements, its curing agent contains high - NCO group and highly toxic free TDI, which is very harmful to the health of workers in the process of construction operation. During the storage and use of composite products, TDI hydrolysis may also occur, releasing toluene diamine (TDA, TDA is a carcinogen) into food, which is potentially harmful to human health. In addition, the solvent ethyl acetate used by it also has certain toxicity and strong irritation, which is very harmful to workers' health and will also cause pollution to the environment. Therefore, in some developed countries in Europe and the United States, the use of this kind of two-component polyurethane adhesive with ethyl acetate as solvent has been successively restricted or prohibited

eco501 alcohol soluble polyurethane adhesive itself does not contain - NCO gene and highly toxic free TDI component, and the solvent industrial ethanol used in the compounding process is also non-toxic, so it is an environmental friendly adhesive that meets the needs of social development

at present, environmental friendly products have been widely used in the packaging industry in developed countries such as Europe and the United States, and alcohol soluble polyurethane adhesive is one of them. Although some developed countries such as Europe and the United States have begun to use a large number of two-component solvent-free adhesives, due to the use cost, product transition, adaptability and other factors, there is still about 40% of the demand for solvent-based adhesives, of which more than 95% are alcohol soluble adhesives

due to the high viscosity of solvent-free adhesive, the dry laminating machine currently used by most laminating packaging manufacturers in China can't evenly coat it, so solvent-free special laminating equipment must be used, and the renewal of the equipment requires a lot of money and a long time to complete. At present, the drying machine for compounding with solvent-free adhesive cannot be produced in China; While more than 20 solvent-free plastic production lines of the 7th CPRJ Automotive Plastics Technology Forum and exhibition will be grandly opened in Wuhan. All the production lines will be transformed into imported equipment, and all the solvent-free adhesives used also rely on import supply, with large equipment investment and high production costs; The gluing system of solvent-free special composite equipment has complex structure, difficult operation and high technical requirements. Special training must be carried out for operators, and workers are required to have a high level of operation to ensure product quality; Due to the small scale, large number and fierce competition of Chinese flexible packaging enterprises, there is a general problem of insufficient business volume, which can not meet the needs of high-speed operation of solvent-free composite production lines, resulting in some equipment often idle and low equipment utilization. These factors greatly restrict the promotion of solvent-free composite technology in China. Therefore, due to different national conditions, China still has a long way to go to popularize solvent-free composite equipment and solvent-free adhesives

using eco501 alcohol soluble polyurethane adhesive, there is no need to update the existing dry-type composite equipment, so there is no need to update additional equipment and other costs, which can not only improve the product grade, but also meet the environmental protection requirements. At the same time, the main operation method is the same as the current ethyl acetate solvent polyurethane adhesive, and there is no need to carry out special training for operators

previously, alcohol soluble polyurethane adhesives had not been officially produced in China, and the demand was completely dependent on imports. The imported alcohol soluble polyurethane adhesive with a solid content of 70% is sold at a price of 45000 ~ 50000 yuan/ton, which is more than twice the cost of the widely used ethyl acetate solvent polyurethane adhesive. Therefore, only a few foreign-funded and joint venture laminating packaging enterprises use it in China. If the demand takes more complex parameters, it is difficult for most laminating packaging enterprises to accept it, so the imported alcohol soluble polyurethane adhesive is difficult to promote

OMAX Industrial (Shenzhen) Co., Ltd. has a factory in mainland China, which greatly reduces the cost compared with imports, and implements localized operation. Eco501 alcohol soluble polyurethane adhesive has a positive impact on improving the quality of China's food packaging, improving the product competitiveness and economic benefits of food enterprises. Especially after China's accession to the WTO, eco501 alcohol signed a cooperation agreement on Railway polyurethane curing track bed project on May 12, 2014. Soluble polyurethane adhesive will bring new opportunities for the development of plastic flexible packaging enterprises and food enterprises

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