Someone once asked me why the performance of water-based ink is inferior to that of oil-based ink. Regardless of brightness, physical properties, chemical resistance, water resistance and adhesive strength, oil-based inks are always superior. Do you think right?
If more than 30 years ago, this comment was correct; now, due to advances in science and technology, the performance of new water-soluble synthetic resins has improved, and some are even better than oil-soluble synthetic resins.
The synthetic resins used for water-soluble inks are basically oil-soluble synthetic resins that are emulsified; they are actually of the same family and their properties are not significantly different; they are just one type of solvent that can be dissolved and the other It can be diluted with water. The basic principle of both films is to use a solvent (water is also a kind of solvent) volatile and infiltrating the resin to form a thin film, and adhere to the surface of the substrate.
Emulsification, also known as diffusion (DISPERSING), is the mixing of oil-soluble resins with water. At a certain pH, emulsifiers (EMULSIFYING AGENT) are used to disperse the resin into very fine and stable particles in water and become a A new emulsion resin (EMULSIONRESIN). This emulsion is extremely stable and can be diluted with any proportion of water without the resin particles being repelled. Now many chemical plants have been able to produce various types of resin emulsions, such as N/C Emulsion, Vinyl Emulsion, ACRYLIC Emulsion, Polyamine Emulsion, Epoxy Resin emulsion (EPOXYEMULSION) and so on. Among them, acrylic resin emulsion and vinyl resin emulsion are commonly used emulsion resins in ink factories.
As we all know, the good and bad color ink performance is determined by the resin used, the resin conjunctiva and the thickness of the film. The mechanism of the oily ink conjunctiva is relatively simple; because the oil-soluble resin is basically dissolved in a solvent, the solution thereof is clear without any particles. When the solvent volatilizes and is absorbed, the resin in the solution forms a packaging machine 'target=_blank> and the transparent film adheres to the substrate.
The mechanism of water-based ink film formation is similar to that of oil-based ink. However, emulsion resins used in water-based inks do not dissolve in water, but only the resin turns into fine particles that diffuse in water. Therefore, when the water volatilizes in space or is absorbed by the substrate, the particles of the emulsion resin form large particles due to their own attractive forces (van der Pain's attraction) and adhere to the surface of the substrate.
This kind of large particle is hard to see with the naked eye. In addition, there is a large gap between the particles and the particles, so the dried film is not exactly the same as the film made of a solvent-based ink. Therefore, the mechanical and chemical properties are very poor. The reflectance of light is small and the refractive index is large, so the brightness is not good. Such factors often form water-based inks better than oil-based inks.
To water-based ink as good as oily ink has good mechanical properties, chemical resistance and high gloss, it is necessary to improve the water-based ink film formation. In other words, after the water-based ink is dried, the emulsion resin particles in the ink must be tightly combined with each other to form a uniform, void-free film. This treatment method is chemically called COALEASENT.
The aggregating agent used in the agglomerating action is a high-boiling point solvent. After the agglomerated treatment of the emulsion resin, the prepared water-based paint and water-based ink will have similar properties to that of the oil-soluble series of the resin.
If more than 30 years ago, this comment was correct; now, due to advances in science and technology, the performance of new water-soluble synthetic resins has improved, and some are even better than oil-soluble synthetic resins.
The synthetic resins used for water-soluble inks are basically oil-soluble synthetic resins that are emulsified; they are actually of the same family and their properties are not significantly different; they are just one type of solvent that can be dissolved and the other It can be diluted with water. The basic principle of both films is to use a solvent (water is also a kind of solvent) volatile and infiltrating the resin to form a thin film, and adhere to the surface of the substrate.
Emulsification, also known as diffusion (DISPERSING), is the mixing of oil-soluble resins with water. At a certain pH, emulsifiers (EMULSIFYING AGENT) are used to disperse the resin into very fine and stable particles in water and become a A new emulsion resin (EMULSIONRESIN). This emulsion is extremely stable and can be diluted with any proportion of water without the resin particles being repelled. Now many chemical plants have been able to produce various types of resin emulsions, such as N/C Emulsion, Vinyl Emulsion, ACRYLIC Emulsion, Polyamine Emulsion, Epoxy Resin emulsion (EPOXYEMULSION) and so on. Among them, acrylic resin emulsion and vinyl resin emulsion are commonly used emulsion resins in ink factories.
As we all know, the good and bad color ink performance is determined by the resin used, the resin conjunctiva and the thickness of the film. The mechanism of the oily ink conjunctiva is relatively simple; because the oil-soluble resin is basically dissolved in a solvent, the solution thereof is clear without any particles. When the solvent volatilizes and is absorbed, the resin in the solution forms a packaging machine 'target=_blank> and the transparent film adheres to the substrate.
The mechanism of water-based ink film formation is similar to that of oil-based ink. However, emulsion resins used in water-based inks do not dissolve in water, but only the resin turns into fine particles that diffuse in water. Therefore, when the water volatilizes in space or is absorbed by the substrate, the particles of the emulsion resin form large particles due to their own attractive forces (van der Pain's attraction) and adhere to the surface of the substrate.
This kind of large particle is hard to see with the naked eye. In addition, there is a large gap between the particles and the particles, so the dried film is not exactly the same as the film made of a solvent-based ink. Therefore, the mechanical and chemical properties are very poor. The reflectance of light is small and the refractive index is large, so the brightness is not good. Such factors often form water-based inks better than oil-based inks.
To water-based ink as good as oily ink has good mechanical properties, chemical resistance and high gloss, it is necessary to improve the water-based ink film formation. In other words, after the water-based ink is dried, the emulsion resin particles in the ink must be tightly combined with each other to form a uniform, void-free film. This treatment method is chemically called COALEASENT.
The aggregating agent used in the agglomerating action is a high-boiling point solvent. After the agglomerated treatment of the emulsion resin, the prepared water-based paint and water-based ink will have similar properties to that of the oil-soluble series of the resin.
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