Color molding film and production method thereof

Abstract

The invention relates to a color forming film and a production method thereof. The color forming film sequentially comprises a composite base material, an ink layer and a co-extrusion forming materialfrom top to bottom, wherein the ink layer is formed by coating inner printing ink on the surface of the co-extrusion molding material through a roller to form a printing film; and glue is coated between the composite base material and the ink layer of the printing film. The production method comprises the following steps: pre-treating a co-extrusion molding material, and carrying out corona treatment on one surface of the co-extrusion molding material; printing the co-extrusion molding material, namely printing the ink layer on the corona treatment surface of the co-extrusion molding material; curing after printing; compounding: compounding the cured printing film with a composite base material; and curing after compounding, namely fully curing the compounded material to finally form thefilm for color molding. Compared with the prior art, production scheduling is convenient, and production is flexible; the color requirement is met, and meanwhile the use requirement of forming packaging can be met.

Description

technical field [0001] The invention relates to the technical field of packaging films, in particular to a forming film with colorful effects and a production method thereof. Background technique [0002] Formed packaging is widely used in the food packaging industry due to its advantages such as wide application range, high packaging production efficiency, and packaging size and shape that can be designed on demand. Due to its formability requirements, forming packaging generally adopts the film produced by multi-layer co-extrusion method as the bottom film part of the packaging raw material, that is, the part that needs forming treatment. [0003] However, multi-layer co-extruded films are limited by materials, and most of them are transparent or transparent and white, which is not suitable for some packaging whose contents do not need or are not suitable for exposure to light. If it is necessary to obtain a colored multi-layer co-extrusion film, it is often necessary to ...

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Problems solved by technology

[0003] However, the multi-layer co-extruded film is limited by the material, most of which are transparent or transparent and white, and are not suitable for some packaging whose contents do not need or are not suitable for exposure to light.

If it is necessary to obtain a colored multi-layer co-extrusion film, it is often necessary to add color masterbatch additives; if the color masterbatch is added, the addition of color masterbatch will lead to a large loss of production at the beginning of production and cleaning after the end of production, and discharge very inflexible

[0004] At the same time, the production of color masterbatch addition will also have the following shortcomings: 1. It is difficult to control the color difference between batches; 2. Only a single solid color multi-layer co-extrusion film can be produced; 3. The production switching loss of different color multi-layer co-extrusion films is large; 4. The color masterbatch is not bright enough, and many bright colors only have organic pigments, which are not suitable for high-temperature processing (multi-layer co-extrusion requires at least 190 degrees)

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