A kind of water-based transfer direct-plating laser coating for cigarette packs and its preparation method

Abstract

The invention relates to an aqueous-transfer direct-plated laser coating material for cigarette packets and a preparation method. The coating material is prepared from the following ingredients in parts by weight: 45-65 parts of styrene-acrylate copolymer emulsion, 20-40 parts of polyurethane emulsion, 0-20 parts of dissolvent, 3-10 parts of mica powder, 2-5 parts of calcium carbonate, 0.1-0.5 part of rheologic auxiliaries, 0-0.2 part of humectant and 0-0.2 part of antifoamer. According to the coating material, the calcium carbonate is used for filling base paper, and platy structures of the mica powder are used for decelerating the infiltration of resin in the paper, so that the base paper coverage of the product is greatly improved, and thus, laser-aluminized paper is high in surface flatness and clear in laser effect; and the range of use to base paper of different absorptivity is wider.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-based transfer direct-plating laser coating for cigarette packs and a preparation method thereof. Background technique [0002] Laser aluminized paper is a kind of flexible packaging printing material with laser anti-counterfeiting effect and metal "aluminum luster" and good barrier properties. It has been widely used in high-end cigarette lining paper, beer label paper, health care products, medicine, cosmetics and other products. Inner packaging and trademark labels. In order to make paper obtain laser and metallic luster effects, the surface of paper must be coated to meet the requirements of laser molding and vacuum aluminum plating. Currently, laser paper appearing on the domestic and foreign markets is produced by the following four methods: [0003] 1. Compositing the laser film on the paper, the laser paper produced by this method has the disadvantages of being ...

AI Technical Summary

Problems solved by technology

[0003] 1. Compositing the laser film on the paper, the laser paper produced by this method has the disadvantages of being difficult to degrade and not environmentally friendly;

[0004] 2. Transfer the laser to the paper by transferring the laser transfer film. This method has complex process, difficult production quality control, large waste of raw materials, low production efficiency, high production cost and other defects;

This invention has the following disadvantages: (1) paper is an absorbent substrate, and the use of solvent-based laser coatings will cause the VOC of the cigarette pack lining paper to exceed the standard, and the coating itself does not meet environmental protection requirements; (2) direct coating of paper will cause coating The mirror effect of the first layer is poor, and the laser effect is weak after molding, which reduces the visual effect of the product

[0007] The currently used transfer laser coatings have poor film-forming toughness, the coating is brittle after aluminum plating, and the aluminum layer is easy to fall off; the surface compactness of the base paper is high, and the current product cannot completely cover the base paper with high absorption. On the surface, there are defects such as aluminum-plated blooming, laser effect decline, etc.

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