PVA (Polyvinyl Acetate) vertical dip coating pattern printing film and preparation method and printing technology thereof

Abstract

The invention relates to a printing film which comprises a carrier layer and a pattern layer which is printed on the carrier layer, wherein the pattern layer is provided with three layers of structures; the first layer is a polyurethane ink layer containing double-component polyurethane ink; the second layer is a pattern covering ink layer containing acrylate resin and a mixed solvent; the third layer is an ink layer containing double-component polyurethane ink and other ink connecting materials; and specific components of each layer of ink and proportions of the special components enable the film provided by the invention to have a larger stretching ratio and uniform stretching and enable the pattern layers to have the characteristics of water insolubility and no fracture. By applying a printing technology of an article dip-coated with the film provided by the invention, double-surface one-step printing for the article and particularly plate type products can be realized; and printing efficiency is greatly enhanced.

Description

technical field [0001] The invention relates to a printing film, in particular to a film for one-time printing on both sides of a plate in a vertical dipping manner in water, a preparation method thereof and a printing process using the film. Background technique [0002] The past dip coating technology is collectively referred to as the "water printing" process. Using water printing technology, patterns can be transferred and printed in water on products of various materials, such as PVC materials, ABS materials, metals, etc. The water printing film used generally includes a printing carrier PVA film layer and a pattern layer printed on the PVA. [0003] Water printing includes laying the printing film on the water surface. After the water-soluble PVA film is degraded, spray a reducing agent on the surface of the patterned film to make the pattern into a liquid state, and press the workpiece obliquely at an angle of 20-30 degrees. In water, if it is to print the pattern on...

AI Technical Summary

Problems solved by technology

This water printing film also has high surface hardness, toughness and fragility, poor rubbing resistance, and the film layer is easy to crack and brittle due to the properties of the ink selected for the ink layer. Therefore, when the film enters water, the PVA absorbs water and the ink layer is also easy Disperses quickly in water, resulting in a low success rate of printing in water, and the printing film has no tension and no stretch rate, and the object can only be pressed into the water from top to bottom in parallel and horizontally. The printing film consumption is more than 300%, and the processing cost is high. Due to the high rate of film breakage, the printing success rate is only 20%, and it is necessary to print on both sides of the plate products twice, and the one-time printing on both sides of the plate cannot be completed by vertical dip coating, resulting in extremely low printing efficiency

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