Pure water type gravure black ink for printing PVC (polyvinyl chloride) decorative film and preparation method thereof

Abstract

The invention provides pure water type gravure black ink for printing a PVC (polyvinyl chloride) decorative film. The pure water type gravure black ink is mainly prepared from the following raw materials in parts by mass: 5-20 parts of carbon black, 50-75 parts of aqueous PVC rubber, 20-30 parts of aqueous polyurethane resin, 10-30 parts of aqueous epoxy resin, 15-35 parts of deionized water, 1-2 parts of an antifoaming agent, 1-2 parts of a dispersing agent and 1-1.5 parts of a surface active agent. A preparation method comprises the following steps: mixing and agitating uniformly all the raw materials, grinding and dispersing an obtained mixture, inspecting the quality of the mixture to be qualified, filtering and packing the mixture, and obtaining the pure water type gravure black ink. The pure water type gravure black ink provided by an embodiment of the invention does not contain any organic solvent in a formula by the mutual cooperation among the aqueous PVC rubber, the aqueous polyurethane resin and the aqueous epoxy resin, is safe and environment-friendly, moreover, enhances a wetting effect on the carbon black, and meanwhile, has favorable wear resistance and film formation performance.

Description

technical field [0001] The invention relates to the field of ink processing, in particular to a pure water gravure black ink for printing PVC decorative films and a preparation method thereof. Background technique [0002] PVC decorative film is a widely used surface decoration material. Firstly, it is printed on PVC, which can have various patterns and embossing patterns. On the double stick laminating machine, the completely dried PVC printed face mask and a layer of PVC transparent film are heated and pressed together. The temperature of the vat of the laminating machine is 180-200°C, and then the laminated film is firmly adsorbed on the surface of the building material through the vacuum suction process, so as to decorate and protect the building material. High-end office furniture, cabinet doors, bathroom cabinet doors, home decoration sets of doors, decorative panels and other building materials can be decorated with it to meet people's different daily needs. [0003...

AI Technical Summary

Problems solved by technology

[0004] However, PVC decorative films currently have the following deficiencies: PVC solvent-based inks are often used for printing PVC decorative films. Human body is healthy, so it is better to use water-based ink instead of solvent-based ink to reduce VOCs emissions and be more environmentally friendly

However, there are two problems with the use of water-based inks. One is that the drying rate of water-based inks is low and cannot be dried quickly, which invisibly prolongs the working hours, which is time-consuming and labor-intensive, and also delays the smooth progress of subsequent processes.

The second is that after printing, the peeling strength of PVC and transparent film PVC is poor. When vacuum forming, the two layers of PVC film will be separated, and the purpose of decoration and protection cannot be achieved.

Generally, when PVC is bonded, the temperature is 180-200°C, so the ink is required to maintain good performance under high temperature environment, but it is easy to peel off after using water-based ink.

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