A kind of preparation method of ink support type aluminized paper

Abstract

The invention discloses a method for preparing aluminum-coated paper with ink-carrying function, which is used in label printing and the like. The present invention specifically relates to a kind of innovation of the ink-supporting type coating used for the primer and top coat in the production of vacuum aluminized paper (the coatings mentioned below all include two types of primer and top coat). The ink-supporting type coating that the present invention relates to is mainly characterized in that water-based epoxy resin is used as the main agent, and water and ethanol are used as solvents to dissolve the two-component ink-supporting coating obtained, wherein the epoxy resin adopts a high-quality coating that meets the following standards Molecular weight bisphenol A water-based epoxy resin: ① Epoxy equivalent (g / eq) 1600-2000, ② Viscosity (cps, 150°C) 1300-10000 (5.8), ③ Softening point (°C) 125-142, ④ Color (platinum-cobalt colorimetric method) 100Max-250Max. The invention solves the problem that the aluminum layer and the ink layer of the aluminized paper label fall off during immersion in alkali solution (NaOH), and the aluminized paper produced by the invention and the printed aluminized paper beer label have strong alkali resistance and permeability Well, the aluminum layer and the ink layer do not fall off during immersion in alkaline solution (NaOH). The invention has great environmental protection application value, and also has great significance in reducing the production cost of beer production enterprises and recycling waste.

Description

technical field [0001] The invention belongs to a functional paper, in particular to a method for preparing an aluminized paper with ink-carrying function, which is used for label printing and the like. Background technique [0002] At present, aluminized paper is widely used in many industries such as label printing and food packaging. It is a composite material that is processed by vacuum spraying aluminum on the surface of ordinary raw pulp paper (substrate) to form an aluminum layer with a thickness of 0.025μm±0.005μm. paper material. Its production process mainly includes: (1) Coating (base coating) on ​​the base paper with a layer of polyketone resin solvent coating; (2) Vacuum spraying aluminum on the surface of the primer; (3) Using a layer of polyketone resin solvent coating The ketone resin solvent-based coating is coated on the surface of the aluminum layer (top coating); (4) Finally, post-processing such as rewinding, moisture regain, slitting, and packaging is ...

AI Technical Summary

Problems solved by technology

The aluminum-plated paper used for printing beer labels, because the general primer is easily soluble in alkali and has poor alkali resistance, when cleaning beer bottles with alkaline water, it is easy to cause the ink and aluminum-plated layer on the beer labels to fall off, which is not only serious Contaminate the cleaning solution for cleaning beer bottles, and the peeled ink and aluminum layer will flow into the recycled bottles, causing secondary pollution to the recycled beer bottles

In order to ensure the cleaning effect, the cleaning fluid must be replaced continuously, which puts huge cost pressure on the recycling of beer bottles for beer production enterprises

At the same time, because the peeled ink and aluminum layer dissolve in the cleaning solution, the entire aluminized paper label becomes "fiber fluff" floating in the cleaning solution, which is difficult to filter and recycle.

[0007] The invention solves the problem that the aluminum layer and the ink layer fall off during the immersion of the aluminized paper label in an alkali solution (NaOH), and relates to the coating of the primer and the top coating in the production process of the aluminized paper

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