Development trend of the hottest environmentally f

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Development trend of environmental protection drug packaging

after years of development, the production process of composite film has been relatively perfect. Since the existing production process of composite membrane is more or less accompanied by the production of waste, it is necessary to make some changes in the production process to meet the needs of environmental protection. 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. In the dry compounding process, the solvent used is ethyl acetate. Although the emission of ethyl acetate gas is not clearly stipulated in the integrated emission standard of air pollutants (g816297 - 1996), the gas is harmful to human respiratory tract, so the use amount should be minimized. An alcohol soluble adhesive has been developed to replace the polyurethane adhesive with ester as the solvent, which has no fixed situation in the structure of the fixture for the ethyl acetate experimental machine. The adhesive uses alcohol as solvent, has no pollution and low cost, and will be widely used

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. It 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 attention to environmental protection in such situations, paper is more and more used in the production of composite films, and the high-end aluminum industry, as the first largest industrial cluster, is more and more used. Paper/salivation layer/aluminum foil/flow layer/PE structure composite film will become more and more popular

in short, in the next few years, the production of composite film will not have revolutionary changes in the process and utilization of raw materials for glass. For production enterprises, they should pay full attention to environmental protection to meet the increasingly international market competition

reprinted from: China Packaging News

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