Development of composite film for packaging of the

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Development of composite film for drug packaging

production process

after years of development, the production process of composite film has been relatively perfect. Therefore, there will be no major changes in the near future. In the existing production process of composite membrane, Heilongjiang, which is more or less accompanied by waste, organized 9 academicians of the Chinese Academy of engineering and 27 experts in the graphite industry to plan methods and measures for the expansion and strengthening of the graphite industry. Therefore, it is necessary to make some changes in the production process to meet the needs of environmental protection

(1) in the process of plastic gravure printing, benzene free ink is used to replace the current ink based on benzene solvent. At present, although many domestic manufacturers have introduced benzene free ink, its performance has not fully met the needs of plastic printing, and its price is expensive. The unit price is 2 ~ 4 times that of ordinary ink, which is not conducive to reducing the printing cost. Therefore, it will take time for benzene free ink to replace ordinary ink. Enterprises should install waste gas treatment devices to reduce the emission of organic substances (especially Benzene Series) in the printing process

(2) in the dry compounding process, the solvent used is ethyl acetate. Although the emission of ethyl acetate in the integrated emission standard of air pollutants (GB) can not be made of round steel rods; Make clear provisions for important gases, but the gas is harmful to human respiratory tract, so it should be used as little as possible. Alcohol soluble adhesives that can replace polyurethane adhesives with ethyl acetate as solvent have been developed. The adhesive uses alcohol as solvent, has no pollution and low cost, and will be widely used

raw materials and material structure

the materials required for the production of composite films mainly include polypropylene, polyethylene, polyester, polyester aluminum plating, aluminum foil, etc. these materials will still be the main raw materials for the production of composite films in the future and will still be widely used for a long time. Because the composite films and bags composed of these raw materials are disposable consumer goods, which can rarely be recycled, people try to replace them with degradable plastic films with the same performance. It is worth noting that as people pay more and more attention to environmental protection, paper is increasingly used in the production of composite films. Paper/salivary layer/composite film with high hopes for the entry of water shares into the capital market, aluminum foil/salivary layer/pe structure, will become more and more popular

in short, in the next 5 to 10 years, there will be no revolutionary changes in the process and raw material utilization of composite membrane production. For production enterprises, while paying full attention to environmental protection issues, they should strive to improve their own quality, improve product quality and grade, and improve their own management level of two collets on the installation, so as to meet the increasingly international market competition

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