METHOD OF PRODUCING POLYMER POWDER COATINGS ON ARTICLES OF COMPLEX GEOMETRICAL SHAPE Russian patent published in 2016 - IPC B05D3/02 F26B3/30 

FIELD: materials.

SUBSTANCE: invention relates to methods of polymer powder coatings application with combined thermal treatment thereof at surfaces of products of complex geometry. Method of producing polymer powder coatings involves application of powder compositions as thermosetting, and thermoplastic in electrostatic field on article surface. That is followed by heating the deposited layer up to melting of the particles and their spreading on article surface and baking the coating. Then, applied layer is heated by infrared radiation with simultaneous blowing of the product with hot air flow in a closed volume. After formation of viscous-current layer, article surface is additionally exposed to infrared radiation until baking temperature for this type of the polymer composition. IR-radiation is scanned along the whole surface of the article. After disconnection of infrared radiation in response to electronic control unit of operation mode parameters of the process the article is additionally subjected to near infrared radiation up to final baking of the coating.

EFFECT: invention technical result is possibility of reducing stage of formation of polymer powder coatings and their quality increase on articles of complex geometrical shape.

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