Waterborne polyurethane cardboard plastic coating and preparation method thereof

Abstract

The invention relates to a waterborne polyurethane cardboard plastic coating and a preparation method. The waterborne polyurethane cardboard plastic coating comprises the following components by weight percentage: 12-22 percent of isocyanate, 2.5-5.0 percent of dimethylolbutanoic acid, 15.5-22 percent of polyester diol, 10-17 percent of hydrophilic solvent, 0.001-0.004 percent of catalyst, 2.5-4 percent of neutral ammonia, 1.5-2.5 percent of chain extender, 50-60 percent of deionized water, 0.02-0.05 percent of antifoaming agent and 0.2-0.5 percent of wetting agent. The waterborne polyurethane cardboard plastic coating contains no harmful solvent and the main solvent of the waterborne polyurethane cardboard plastic coating is water, so that the waterborne polyurethane cardboard plastic coating is environment-friendly in production and application, high in adhesive strength, and excellent in high-temperature and high-humidity back-tacking property when coated on a paper print, and is particularly applicable to thermocompression bonding of the paper print with PET (polyethylene terephthalate) and PVC (polyvinyl chloride) plastic sheets.

Description

technical field [0001] The invention relates to the technical field of water-based polyurethane synthesis and application, in particular to a water-based polyurethane cardboard blister coating and a preparation method thereof. Background technique [0002] At present, with the continuous development of my country's market economy, commodity packaging is increasingly diversified, and people have higher and higher requirements for packaging. In addition to internal quality, there are also special requirements for external appearance. At present, the small commodities displayed on the commodity display racks of the supermarket are generally placed in the PET / PVC blister cover and bonded to the cardboard to make a single-sided blister elevator. When the coating is bonded to the cardboard by hot pressing, its blister fastness is mainly determined by the characteristics of the blister coating on the printed matter. At present, the blister coatings coated on this type of blister e...

AI Technical Summary

Problems solved by technology

At present, the blister coatings coated on this type of blister elevator are generally solvent-based, and this type of coating contains benzene, ketones, esters and other solvents that are harmful to the human body, which will damage the health of the on-site coating personnel. ; A small number of plastic elevators use water-based acrylic plastic oil, but this type of plastic oil has poor high-temperature and high-humidity return viscosity. It is easy to stick together, and the printed graphics and texts on the printed matter will peel off, resulting in a large number of scrapped products and a waste of social resources

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