Die pressing coating capable of being transferred onto composite metal surface and laser film comprising die pressing coating

Abstract

The invention discloses a die pressing costing capable of being transferred onto a composite metal surface. The die pressing costing comprises 6-10% of cellulose acetate butyrate, 4-8% of acrylic resin, 2-6% of nitrocotton liquid, 25-35% of butanone, 10-20% of propylene glycol monomethyl ether and 28-32% of ethyl acetate, and is 1.3-1.5 micrometers in thickness. The die pressing coating is compact in surface, not easy to erode by solvent utilized in follow-up processing, suitable in strength for die pressing, good in stripping, and particularly suitable for being transferred onto an aluminum foil surface of composite aluminum foil paper to be colored and embossed after the die pressing, so that the composite aluminum foil paper with laser effect can be obtained. The invention further provides a laser film comprising the die pressing coating. The laser film comprises a basic film, and the die pressing coating which is provided with laser patterns after die pressing treatment is coated on the basic film, and a vacuum aluminum coated layer is arranged on the die pressing coating. The composite aluminum foil paper with bright, smooth and massive laser effect can be obtained by compositing the laser film with the composite aluminum foil paper and peeling the same off, and the process is easy to control.

Description

technical field [0001] The present invention relates to a coating, in particular to a molded coating which can produce a laser effect on a substrate through transfer and molding, and more particularly to a molded coating which can be transferred to a composite metal surface and then molded to produce a laser effect. layer. The present invention also relates to a laser film containing the above molded coating. Background technique [0002] At present, the materials used as the lining paper of cigarette packs on the market mainly include three traditional materials: aluminum foil composite paper, transfer paper, and direct-plating lining paper; aluminum foil composite paper is made by wet or dry compounding of pure aluminum foil and base paper Composite wrapping paper; transfer paper is based on PET and BOPP, coated with color, vacuum aluminized and compounded with base paper, and then the substrate is peeled off to transfer the aluminized layer to the base paper; direct plat...

AI Technical Summary

Problems solved by technology

[0002] At present, the materials used as the lining paper of cigarette packs on the market mainly include three traditional materials: aluminum foil composite paper, transfer paper, and direct-plating lining paper; aluminum foil composite paper is made by wet or dry compounding of pure aluminum foil and base paper Composite wrapping paper; transfer paper is based on PET and BOPP, coated with color, vacuum aluminized and compounded with base paper, and then the substrate is peeled off to transfer the aluminized layer to the base paper; direct plating backing paper The coated base paper is directly placed in a vacuum aluminum coating machine for aluminum spraying; aluminum foil composite paper is used most because of its sealing performance, forming performance, and barrier properties compared with the other two traditional materials, but aluminum foil composite paper is due to The appearance is not bright enough, there is no laser visual effect produced by transfer paper for molding, the grade is low, and it cannot be used for high-end cigarette packaging

In order to solve this problem, those skilled in the art carry out compound transfer by adopting the aluminum plating effect base film containing the molded layer and the aluminum layer of the aluminum foil composite paper, and then coloring and embossing, although this method can obtain a laser effect Aluminum foil composite paper, but the production process of this method is difficult to control, and the products obtained are often unsatisfactory. The reasons are: 1. The existing molded layer has poor penetration resistance and corrosion resistance. Because the molded coating needs to be coated before composite transfer The adhesive layer needs to be colored after transfer, and the solvent contained in the adhesive layer and the color layer will penetrate into the molded coating, causing the molded coating to be eroded and become uneven, affecting the subsequent embossing effect ; 2. The existing molded layer is relatively thin. Because the molded coating and the glue layer are sandwiched between the aluminum foil and the base film during the composite transfer process, the compactness of the aluminum foil and the base film is very good, so the molded coating The solvent contained in the glue layer and the glue layer has no place to volatilize when drying, causing defects such as air bubbles, white spots, roughness, and no brightness on the surface of the molded layer, which greatly affects the appearance of the product

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