Water-based coating oil is mainly composed of three main components: a main agent, a solvent, and an auxiliary agent.
1, the main agent. The main agent of waterborne coating is a film-forming resin, usually a synthetic resin, which influences and dominates the physical properties of the deep layers and the glazing qualities of the film, such as gloss, adhesion, and drying properties.
There are many types of aqueous film-forming resins, but the most common ones at home and abroad are acrylic resin copolymer resins. The properties of its copolymer resins depend on the composition of the monomers and the synthesis process. Waterborne acrylic copolymer resin has a series of excellent properties such as good film forming property, good glossiness, high transparency, fast drying speed, abrasion resistance and water resistance, and is widely used in waterborne coating oils.
2, additives. Additives are used to improve the physicochemical properties and processing characteristics of aqueous coatings. Commonly used additives are: curing agents, surfactants, defoamers, desiccants, adhesion promoters, wetting and dispersing agents and other additives.
There are many types of additives, depending on the type of topcoat. However, the amount of all types of additives should not exceed 5% of the total amount, otherwise it will affect the processing flexibility of coating oil.
3, solvent. The main role of the solvent is to disperse or dissolve synthetic resins and various additives. Water-based coating oil is mainly composed of three main components: a main agent, a solvent, and an auxiliary agent.
1, the main agent. The main agent of waterborne coating is a film-forming resin, usually a synthetic resin, which influences and dominates the physical properties of the deep layers and the glazing qualities of the film, such as gloss, adhesion, and drying properties.
There are many types of aqueous film-forming resins, but the most common ones at home and abroad are acrylic resin copolymer resins. The properties of its copolymer resins depend on the composition of the monomers and the synthesis process. Waterborne acrylic copolymer resin has a series of excellent properties such as good film forming property, good glossiness, high transparency, fast drying speed, abrasion resistance and water resistance, and is widely used in waterborne coating oils.
2, additives. Additives are used to improve the physicochemical properties and processing characteristics of aqueous coatings. Commonly used additives are: curing agents, surfactants, defoamers, desiccants, adhesion promoters, wetting and dispersing agents and other additives.
There are many types of additives, depending on the type of topcoat. However, the amount of all types of additives should not exceed 5% of the total amount, otherwise it will affect the processing flexibility of coating oil.
3, solvent. The main role of the solvent is to disperse or dissolve synthetic resins and various additives.
In short, whether they are water-based varnishes or other water-based materials, they are not ideal for the printing of non-absorbent substrates (printability is better on paper with good absorbency), and they need to be further improved. And perfect.
The flexo printing machine is finished by the printing unit, so it can also be called "printing light". Can use water-based varnish, or add UV drying system, use UV varnish. There is also a dedicated glazing unit for light on both sides of the front and back, and it can also be used for coating operations on adhesives, which can be combined into stickers for printed products. The gloss coating is thicker than the printing ink layer for better gloss or other effects.
There are quite a few varieties of glazing (printing) materials, and the selection of compatible varnish is a major factor in improving the quality of flexographic products.
Flexographic printing usually involves the addition of a water-based or UV ink at the end of the color sequence to be completed by the printing unit. In addition to enhancing the glossiness of the prints, it is also intended to enhance the physical properties of the print surface to meet the need for on-line processing after printing, as well as the practical requirements of commodity packaging, and become an indispensable process. Flexographic printing inks are available in both waterborne and UV varnish depending on the product requirements.
Printing ink full version of the printing and local printing.
1 Full-page printing is printed by a special printing roller (rubber roller seam printing plate).
2 Partial printing needs to be made into a printing plate, and it will be applied to the required parts of the printing product.
It should be pointed out that many printed packaging must use partial printing in order to meet the requirements of post-press processing.
A brief analysis of the composition of waterborne coatings and their respective uses
January 05 11:05:52, 2020
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