Device and method for coating OPP film with heat-seal glue in fixed point mode

Abstract

The invention relates to a device for coating an OPP film with heat-seal glue in a fixed point mode. The device comprises a printing film unreeling part, a printer unit, a heat-seal glue coating part, a first drying walkway, a second drying walkway, an air cooling device and a printing film reeling part which are sequentially arranged. The heat-seal glue coating part is provided with an electric engraving gravure roller, and the electric engraving gravure roller is matched with the heat-seal arrangement of a printing film so that the heat-seal arrangement area of the printing film can be coated with the heat-seal glue in the fixed point mode. The length of the first drying walkway ranges from 3 m to 4 m. The length of the second drying walkway ranges from 8 m to 10 m. The correspondingly produced heat-seal OPP printing film is of a single-layer film structure, is used for manufacturing a packaging bag, and has the advantages that transparency is higher, the heat-seal strength is low, and tearing is convenient. The whole coating technology process is simple, operation is convenient, and the production efficiency of the heat-seal OPP film is higher.

Description

technical field [0001] The invention belongs to the technical field of heat sealing of OPP packaging films, and in particular relates to a method and a device for heat sealing by coating an OPP film with a heat sealing adhesive. Background technique [0002] Packaging bags based on OPP film are widely used in the packaging of food and fruit. In the prior art, in order to adapt to the preparation of packaging bags, OPP film is generally covered with a layer of heat-sealing film on the surface after printing to realize the film material. Finally, the edge heat sealing is realized to complete the final forming of the flat plate into the packaging bag. The existing packaging bag based on OPP film is essentially a composite film such as OPP38 / CPP20. The purpose of the composite is to achieve heat sealing. However, the current composite heat-sealing film process is not only complex, the process is too long, the production efficiency is low, and the cost of raw materials is high, b...

AI Technical Summary

Problems solved by technology

However, the current composite heat-sealing film process is not only complex, the process is too long, the production efficiency is low, and the cost of raw materials is high, but also the heat-sealing strength of the packaging bag produced by this composite film is too high, which is not convenient for consumers to unpack. In addition, the double-layer film material will also cause the transparency of the final product packaging bag to fail to meet the preparation requirements of packaging bags with high transparency requirements

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