High level resistance water-based matt varnishing for plastic film and preparation method of high level resistance water-based matt varnishing

Abstract

The invention discloses high level resistance water-based matt varnishing for plastic film. The high level resistance water-based matt varnishing for the plastic film is prepared from, by mass, 75%-85% of water-based matt resin, 3%-10% of deionized water, 0.1%-1% of antifoaming agents, 0.3%-3% of flatting agents, 0.05%-0.5% of pH stabilizers, 0.5%-5% of slipping agents, 1%-6% of scraping resistance agents, 0.1%-1% of thickener, 0.05%-2% of antiseptic and 0.5%-3% of cross-linking agents; the water-based matt resin is polycarbonate type water-based polyurethane dispersion. The invention further discloses a preparation method of the high level resistance water-based matt varnishing. The high level resistance water-based matt varnishing has the advantages of solvent type matt varnishing and the water-based matt varnishing and is green and environmentally friendly, free of VOC discharge, high in solid content, high in viscosity, resistant to abrasion and scratch, stable in heat sealing and storage and wide in application range.

Description

technical field [0001] The invention relates to a matte finish and a preparation method thereof, in particular to a high-resistance water-based matte finish for plastic films and a preparation method thereof. Background technique [0002] The outer film of the composite packaging bag is mainly polypropylene (OPP) and polyester film (PET). Although the gloss is very bright, the vision is monotonous. In order to improve the layering and touch of the product packaging appearance, the new process is designed as the reverse side (inner side) of the film. Printing ink, the front (outside) is partially printed with matte surface oil (also called matte oil), so that the layer contrast of matte / bright light appears on the outside of the packaging bag at the same time, and the parts to be displayed are set off or embellished. This type of packaging has become more and more popular in high-end products. Hair and fashion, such as food bags, facial mask bags, gift boxes, personal care pr...

AI Technical Summary

Problems solved by technology

Resin-type dummy oil based on organic solvents, mainly polyamide and polyurethane, organic solvents exceed 70% on average, plus solvents that are continuously replenished during the printing process, the total VOC volatilization is not less than 5 times that of the film-forming solids, It has caused serious harm to the ecological environment and human health. At the same time, due to the low solid content (≦30%), the film is thinner after printing, and the wear resistance and scratch resistance are extremely poor, and scratches and scratches are easy to occur

Dull oil in polyamide system, heavy amine or sour taste, low crosslink density between film-forming molecules, difficult to form macromolecular network structure, poor chemical resistance and high temperature disinfection; dumb oil in polyurethane system, strong adhesion to OPP film Low hardness (only applicable to PET), coupled with high overall cost (twice higher than polyamide dumb oil), is not conducive to promotion and application

[0004] The acrylic emulsion matte oil based on the water-based system has no VOC emissions, but it is only suitable for absorbent substrates, such as paper or primer-coated films, and has poor heat resistance, rubbing resistance, and disinfection resistance. Ordinary paper box coating, such as cigarette and wine boxes, small daily-use or electronic product cartons