Heat balance BOPP film for mold internal heating attaching and manufacturing technology thereof

Abstract

The invention discloses a heat balance BOPP film for mold internal heating attaching and a manufacturing technology thereof. The heat balance BOPP film is composed of a core layer, an inner surface layer and an outer surface layer. The core layer is prepared from a stiffness increasing master batch and homo-polypropylene, wherein the content of the stiffness increasing master batch is 3-8 wt%; the inner surface layer is a corona treatment layer and is prepared from an anti-blocking master batch, a polymer alloy conductive master batch and homo-polypropylene, wherein the content of the anti-blocking master batch is 3-5 wt%, and the content of the polymer alloy conductive master batch is 5-10 wt%; the outer surface layer is prepared from an anti-blocking master batch, a polymer alloy conductive master batch and ethylene-propylene-butadiene copolymer, the content of the anti-blocking master batch is 3-5 wt%, and the content of the polymer alloy conductive master batch is 5-10 wt%. The heat balance BOPP film has the good heat stability, the transverse and longitudinal contraction rates are the same, and the film has the good attaching performance with a mold, and is strong in static electricity conduction capacity, excellent in printing performance and suitable for grasping operation of a mechanical arm.

Description

technical field [0001] The invention relates to the technical field of films, in particular to a heat-balanced BOPP film for in-mold thermal lamination and a manufacturing process thereof. Background technique [0002] At present, the outer label of the container is a printed BOPP film (biaxially oriented polypropylene film). After the film is printed, it is pasted on the surface of the container with glue. Drying and other processes are inefficient; glue is used in the pasting process, which is not environmentally friendly; the film and container are not conformable, easy to wrinkle, and affect the appearance; the fastness of the film is limited by the bonding strength of the glue, and the storage time is long or the storage environment temperature 1. When the humidity changes greatly, the bonding strength of the glue decreases, and the printed film is easy to fall off; the anti-counterfeiting function is poor, and it is easy to be imitated or forged; the static electricity...

AI Technical Summary

Problems solved by technology

[0002] At present, the outer label of the container is a printed BOPP film (biaxially oriented polypropylene film). After the film is printed, it is pasted on the surface of the container with glue. Drying and other processes are inefficient; glue is used in the pasting process, which is not environmentally friendly; the film and container are not conformable, easy to wrinkle, and affect the appearance; the fastness of the film is limited by the bonding strength of the glue, and the storage time is long or the storage environment temperature 1. When the humidity changes greatly, the bonding strength of the glue decreases, and the printed film is easy to fall off; the anti-counterfeiting function is poor, and it is easy to be imitated or forged; the static electricity of the film is poor, and it is prone to electrostatic adsorption when the manipulator is working, causing the manipulator to grab In the case of multiple films

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