What is varnish? What is the main ingredient is?-Iota

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Service > What is varnish? What is the main ingredient is?

What is varnish? What is the main ingredient is?

Varnish is a colorless, clear lacquer, and its role is twofold: 1. As a transparent protective lacquer, its hardness and wear resistance properties better than paint, play a protective role; 2 as hand paint, its luminosity and brightness are. good, feels feel good. Silicone pieces on the PU spray paint and plastic parts spray paint UV Varnish is this. Ingredients: UV Varnish Varnish on 1.UV mainly by the oligomer, reactive diluent, light initiator and other auxiliary. (1), also known as oligomer oligomer prepolymer, is the most basic of UV coatings components. It is a film-forming material, its performance and the nature of the curing process the cured film plays an important role. From a structural point of view, both oligomers containing unsaturated C = C double bond of the low molecular weight resin, mostly acrylic resin. (2) a reactive diluent is also called cross-linking monomer, a functional monomer. Its role in the regulation of the coating viscosity, cure speed and cured film properties. (3) a photoinitiator The photoinitiator is capable of absorbing radiant energy, through a chemical change to produce a substance having the ability to initiate the polymerization of reactive intermediates, is the main component of any UV curing systems are needed. (4) additive used to improve the performance of the ink. UV coatings commonly used additives are: 1) a stabilizer / thermal polymerization to reduce storage, improve storage stability Varnish; 2) leveling agent / used to improve the film surface leveling prevent shrinkage of production, but also increase the gloss coating coating; 3) defoamers / used to prevent and eliminate air bubbles generated in the manufacture of coatings and use. 2. water-based varnish coatings are composed of two parts water, 45% of synthetic resins and synthetic resin and 55% water. (1) Main agent: film-forming resin, film-forming substance polish synthetic resin is generally affect the drying, adhesion, gloss, and other quality glazing. (2) adjuvants: 1) a curing agent, to improve the film-forming properties of water-based main agent, to enhance the degree of the cohesive strength of the film formation; 2) a surfactant, to reduce surface tension, improve leveling; 3) defoamers, control blistering, needle, orange peel, pitting; 4) desiccant dry glazing increase speed and improve the adaptability of printed materials; 5) an adhesion promoter to improve the adhesion of coatings of printed materials; 6) wetting and dispersing agents prevent sticking dirty improve wear resistance; 7) plasticizer to improve folding performance. (3) solvent: dispersed and dissolved synthetic resins, additives, the main ingredient is water (which can add some ethanol, improve dry performance). Second, the varnish dry 1.UV main supporting general drying UV drying, infrared drying, cooling the exhaust. 2. The main use of infrared drying water-based varnish, hot air drying.

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