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Showing posts from December, 2020

Common problems and preventive measures in coating construction

  "Inexperienced construction workers often have problems such as peeling, pinholes, and blistering when spraying paint .  What is causing such a problem? How to prevent and solve?" Stop Corona Virus,Stay safe,Hand wash frequently ! 1. Peeling  Undercutting refers to the phenomenon of peeling and peeling caused by the solvent in the upper coating that softens and swells the bottom paint film, resulting in poor adhesion of the bottom paint film. Causes: (1) The topcoat film is too thick, swelling the underlying primer, causing the primer coating to wrinkle and cause biting;  (2) The topcoat is sprayed before the primer coating is not dry; (3) The primer does not match the top coat. For example, the primer uses polyurethane paint series, and the top paint uses acrylic paint or epoxy paint;  (4) If the bottom putty is not dry, start applying the primer, then when applying the top paint, the primer It will be melted up, resulting in a "bottom biting" phenomenon. Preven