Lucky is a film-forming colloidal solutions of substances, resins, bitumen, drying oils (linseed, tung, etc.), cellulose esters or compositions of these materials in specially selected organic solvents (toluene, alcohols, turpentine, etc.). During the drying process of lacquer solvents evaporate out of it, and varnishing the basis of (film-forming substances) occurring physical and chemical processes that lead to hardening of the latter, ie, to the formation of the varnish film. According to the purpose electrical insulating varnishes are divided into impregnating, coating and adhesives. Impregnating varnishes used for the impregnation of windings of electrical machines and devices to improve their isolation, increasing the thermal conductivity of the windings and to increase their water resistance (PL-98 varnish or lacquer ML-92). Coating paints can create a protective (water-resistant, oil resistant, etc.) The surface-treated windings, as well as plastics and other electrical parts. Coating paints are also used to protect metal parts from corrosion.
Adhesives, Coatings are designed for bonding mica leaves together or with paper and fabrics to produce mica insulation materials (Micanites, mikalenty, etc.). Enamels are paints, which are introduced in the pigments – inorganic fillers (zinc oxide, titanium dioxide, iron minium, etc.). Pigmenting substances introduced to increase the hardness, mechanical strength, arc conditions and other properties of enamel films. Enamels are blanket materials. They are used to create on the surface is impregnated windings or insulating components of the protective water resistant, oil-resistant coatings or arc conditions with high hardness. A distinction has emallaki representing special Group paints without pigment introduced.
Emallaki used to create thin (0.03-0.09 mm) and flexible insulation coatings for magnet wires (wires with enamel insulation.) By way of drying varnishes and enamels distinguish hot (Oven) and cold (air) drying. The former demand for its high-temperature curing (80 to 200 C) and the second dry at room temperature. Varnishes and enamels baking, as a rule, have higher electrical, mechanical and other properties.