Ultralow temperature heat-sealing tape-casting polypropylene aluminum plating film

Abstract

The invention discloses an ultralow temperature heat-sealing tape-casting polypropylene aluminum plating film, wherein a base film of the aluminum plating film is produced by adopting a three-layer co-extrusion tape-casting method, the three layers are a corona layer, an intermediate layer and a heat-sealing layer respectively; through performing vacuum aluminum plating on the surface of the corona layer of the base film, the ultralow temperature heat-sealing tape-casting polypropylene aluminum plating film is obtained; due to the adoption of the ultralow temperature heat-sealing tape-casting polypropylene aluminum plating film, the heat-sealing temperature can be effectively reduced, the aluminum plating adaptability is preferable, the crystal point and the stratification are avoided, the production efficiency is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to an ultra-low temperature heat-sealed cast polypropylene aluminized film used in the fields of printing, compounding, and packaging, and is suitable for the fields of rapid packaging of food, medicine, and daily chemical products. Background technique [0002] With the advancement of technology, it is the general trend for flexible packaging machinery to develop towards high speed, automation and integration. As a flexible packaging material - ordinary copolymerized polypropylene, its heat sealing temperature is difficult to meet the high-speed instantaneous heat sealing of the new generation of packaging machinery need. Therefore, reducing the heat-sealing temperature has become an urgent requirement for upstream film suppliers in the printing and packaging industry. Since the ordinary polypropylene aluminized film uses copolymerized polypropylene as the heat-sealing layer, although the types of copolymerized polypropylene...

AI Technical Summary

Problems solved by technology

Since the ordinary polypropylene aluminized film uses copolymerized polypropylene as the heat-sealing layer, although the types of copolymerized polypropylene are different, the heat-sealing temperature of the film is also different, but the heat-sealing temperature of the film is far lower than that of polyethylene.

If polyethylene is simply selected as the heat-sealing layer, the produced film will have crystal points and delamination due to the incompatibility of polyethylene and polypropylene, and the interlayer strength will not meet the requirements.

Moreover, as the heat-sealing temperature decreases, the adhesion of the film during aluminum plating is also more serious, which brings serious adverse effects to the film aluminum plating.

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