Water-based coated composite environment-friendly packaging material and preparation process thereof

Abstract

The invention provides a water-based coated composite environment-friendly packaging material and a preparation process thereof, and belongs to the technical field of packaging. The composite environment-friendly packaging material comprises a second composite film, the second composite film is obtained by a first composite film and a polyolefin film through a solvent-free extrusion compounding technology, the first composite film comprises a BOPP printing layer and an aluminum-plated PET layer, the BOPP printing layer and the aluminum-plated PET layer are bonded into a whole through a spraying film, the BOPP printing layer and the spraying film are bonded into a whole through an upper adhesive layer, the upper adhesive layer is a water-based primer adhesive, the BOPP printing layer is prepared by printing a BOPP film by adopting a satellite type flexographic printing machine, and the aluminized PET layer is connected with the polyolefin film. Starting from VOCS emission treatment and aluminum layer protection, the green and environment-friendly composite packaging material without VOCS emission and without aluminum layer delamination is prepared by adopting the water-based primer adhesive, optimizing a lamination layer formula, adopting a solvent-free compounding mode and the like, and the requirements of markets and consumers for health, sanitation and environmental protection are met.

Description

technical field [0001] The technical field of packaging of the present invention specifically relates to a water-based coated composite environmental protection packaging material and a preparation process thereof. Background technique [0002] The development of flexible packaging and the development of the food industry complement each other. In recent years, with the strengthening of domestic product quality and environmental protection awareness, green packaging materials and processes are increasingly favored by the composite film packaging industry and flexible packaging end users. The primers of existing packaging materials all use solvent-based adhesives and ethyl ester as a diluent, which leads to large emissions of volatile organic compounds (VOCS), and there is a relatively large environmental risk. [0003] Traditional extrusion coating packaging materials use polyurethane adhesives, which are diluted with ethyl ester as a solvent and coated by anilox rollers. A...

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Problems solved by technology

The primers of existing packaging materials all use solvent-based adhesives and ethyl ester as a diluent, which leads to large emissions of volatile organic compounds (VOCS) and a greater environmental risk

[0003] Traditional extrusion coating packaging materials use polyurethane adhesives, which are diluted with ethyl ester as a solvent and coated by anilox rollers. After curing for 24 hours, the adhesives are cured to form bond strength. This process has the advantages of dissolution discharge and long curing time. and other disadvantages, and it is easy to affect the rate during the curing process of the adhesive, resulting in the transfer of the aluminum layer, resulting in a decrease in the performance of the composite film in terms of water vapor and oxygen barrier.

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