BOPP film capable of being directly used for paper-plastic compounding and preparation method thereof

Abstract

The invention discloses a BOPP film capable of being directly used for paper-plastic compounding and a preparation method thereof, and relates to the technical field of films. The BOPP film comprisesan upper surface layer, a core layer and a lower surface layer. The upper surface layer is made of homo-polypropylene and anti-sticking master batch, and the anti-sticking master batch is composed ofhollow ceramic microbeads and homo-polypropylene; the core layer is made of homo-polypropylene; and the lower surface layer is made of an ethylene-ethyl acrylate copolymer and low-density polyethylene. The BOPP film prepared by the method is good in brightness, and can be directly compounded with paper under a hot pressing condition, so that a procedure and a tool for applying a hot melt adhesiveare omitted, and the pollution of a primer to the environment is avoided; and besides, in the preparation process, the core layer melt is distributed into a plurality of die heads, and a multi-layer co-extrusion structure is adopted, so that the requirements of production equipment for different film thicknesses can be flexibly met, and the burden of the equipment is reduced.

Description

technical field [0001] The invention relates to the technical field of films, in particular to a BOPP film which can be directly used for paper-plastic composite and a preparation method thereof. Background technique [0002] Film lamination, also known as "laminated plastic", "mounted glue", "film sticking", etc., is a processing technology that combines plastic film and paper products with heat and pressure to form a paper-plastic product. The coated printed matter has a smoother and brighter surface due to the addition of a thin and transparent plastic film on the surface. The transparent brightness of the film is high, the graphic color is more vivid, full of three-dimensional effect, and the gloss and fastness of paper products are improved. , At the same time, it also plays the role of waterproof, antifouling, wear resistance, pleat resistance, chemical corrosion resistance, etc. It is especially suitable for the packaging of green food and other commodities, and can a...

AI Technical Summary

Problems solved by technology

Roughly divided into two types: instant coating process and pre-coating process, that is, the volatilization and overflow of toxic substance benzene in the coating process, it is easy to form air bubbles between the film and paper to affect the appearance, the adhesive strength is low, and there are safety hazards in the production process , has been gradually replaced by the pre-coating process, but most of the films used in the pre-coating process currently have a primer, that is, the primer is coated on the surface of the base film, dried and then combined with a hot melt adhesive

In the later stage of the product, the primer will precipitate and pollute the film surface, and the primer will also affect the brightness of the pre-coated film. In addition, the application of the primer will increase the energy consumption of the pre-coated film process, making the processing process difficult to control

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