Manufacturing method of colour printed composite paper board for packaging box

Abstract

A chromatographic composite paperboard for packing case (or box) is composed of chromatographic layer, non-transparent polypropylene layer, adhesive layer and single-or multi-layer paperboard. Its advantages are low cost, high performance, and beautiful appearance.

Description

technical field [0001] The invention relates to a method for making composite cardboard for packaging boxes. Background technique [0002] Traditional paper packaging box forming cardboard is divided into two types: non-color printing and color printing. The former material basically uses yellow kraft paper as the surface material, which is compounded with ordinary cardboard paper (including tea board paper, gray board paper, white board paper, etc.) by a compound machine. The latter is made of high-cost and high-cost wood pulp white board paper, white cardboard, art paper, etc., which are printed in single-sheet lithographic color and then laminated with ordinary single-piece boxboard paper with yellow kraft paper as the surface material. , made of color-printed cardboard, and then laminated with corrugated cardboard to make cartons; or directly laminated with ordinary cartons and cartons that have already been made. Non-color printed cardboard has low manufacturing cost ...

AI Technical Summary

Problems solved by technology

The traditional color printing cardboard manufacturing method cannot solve the two key problems of continuous color printing in rolls and continuous lamination with ordinary cardboard paper

Due to the above reasons, the manufacturing cost of color-printed carton boxes is very high, which also leads to higher prices for high-end packaging products.

[0003] With the development of new materials, there is a kind of packaging box board that uses biaxially stretched polypropylene film as the outer layer and is printed on the concave wheel machine. Although it has waterproof and color printing effects, it still has the following shortcomings: 1. Biaxially stretched polypropylene film Even if the acrylic film (OPP film for short) is compounded on the white board paper, it cannot show the writing characteristics of the paper

2. Printing on the gravure printing machine can only be back printing (also known as bottom printing), not front printing (also known as surface printing). After back printing, the film itself only leaves a mark, and the imaging effect cannot be displayed alone, so compounding can only be selected white board paper contrast

3 Can only be printed first and then compounded, but not compounded and then printed

4 When laminating with white board paper, solvent-based glue (also known as water-based glue) is used. Therefore, some small air bubbles are prone to appear during wet composite molding, which will affect the imprinting and imaging of the OPP film

5. Since the OPP film is not paper, its back printing effect will continue to appear overlapping or drifting due to the horizontal and vertical extension of the film itself.

6 Due to the selection of OPP film and water-based glue, it cannot meet the conditions for automatic box-making assembly line operations

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