Transparent packaging film and preparation method thereof

Abstract

The invention relates to a transparent packaging film and a preparation method thereof. The transparent packaging film comprises an NY (nylon) film layer, an adhesive layer and a PE-NY (polyethylene-nylon) co-extrusion film which are tightly bonded, wherein the PE-NY co-extrusion film layer consists of a corona layer, a first adhesive layer, a middle layer, a second adhesive layer, a first heat sealing layer, a second heat sealing layer and a third heat sealing layer which are sequentially adhered together; the corona layer comprises 66.7 to 66.8wt% of linear low density polyethylene, 33.1 to33.3wt% of high-pressure low density polyethylene and 0.04 to 0.05wt% of fluoride processing additive; the first adhesive layer and the second adhesive layer comprise polyethylene bonding resin; the middle layer comprises copolymerizing nylon; the first heat sealing layer and the second heat sealing layer comprise metallocene polyethylene; the third heat sealing layer comprises 95 to 97wt% of metallocene polyethylene, 2 to 3wt% of smoothing agent and 1 to 2wt% of opening agent. The transparent packaging film is a composite film with good heat sealing and packaging adaptability.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a transparent packaging film and a preparation method thereof. Background technique [0002] At present, the films mainly used for food packaging include polyethylene, polyester, polypropylene, etc., but as far as the current situation is concerned, the use of food packaging films is large and there are many types. These simple polymer films are very important for the high temperature resistance of food packaging films Sex, walking adaptability, curling and other aspects are not up to the requirements. This requires improving the structure of the existing single film to increase the properties of the film for food packaging, such as compounding, heat sealing and high-speed automatic packaging adaptability. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a transparent packaging film and a ...

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Problems solved by technology

[0002] At present, the films mainly used for food packaging include polyethylene, polyester, polypropylene, etc., but as far as the current situation is concerned, the use of food packaging films is large and there are many types. These simple polymer films are very important for the high temperature resistance of food packaging films Sex, machine adaptability, curling and other aspects are not up to the requirements

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