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    Home > Coatings News > Paints and Coatings Market > Paint common sense: solution to paint falling

    Paint common sense: solution to paint falling

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: the phenomenon of paint dropping, sagging and uneven film on the base surface can be called paint sagging

    The main reasons are that the prepared paint is too thin, the adhesion is poor, part of the paint flows under the action of gravity; the paint film is too heavy and falls due to too thick painting or spray painting; the construction environment temperature is too low, the paint film dries slowly; the paint contains too many heavy pigments, some of the paint sags; the surface of the object base is uneven, the thickness of the paint film is uneven, the drying speed is different, and the parts with too thick paint film are easy to fall There are oil, water and other pollutants on the surface of the base course of the object which are not compatible with the paint and affect the adhesion, resulting in the sagging of the paint film

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    The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: paint in the basic surface of the drop, sagging, uneven film phenomenon can be called paint sagging

    The main reasons are that the prepared paint is too thin, the adhesion is poor, part of the paint flows under the action of gravity; the paint film is too heavy and falls due to too thick painting or spray painting; the construction environment temperature is too low, the paint film dries slowly; the paint contains heavy pigments Too much, part of the paint is sagging; the surface of the object base course is uneven, the thickness of the paint film is uneven, the drying speed is different, and the parts with too thick paint film are easy to flow down; the surface of the object base course has oil, water and other pollutants which are incompatible with the paint, affecting the adhesion, causing the paint film sagging

    What measures can be taken to prevent paint from falling? First of all, we should choose the paint with good quality and diluent with proper volatilization speed, and control its penetration

    Secondly, the surface of the object shall be treated flat and smooth, and the surface oil, water and other dirt shall be removed

    The ambient temperature of the re construction shall meet the standard requirements of the type of paint

    For example, the varnish should be painted within 3 hours at 20-27 ℃

    When painting again, it shall be carried out according to the process procedure: first, vertically, horizontally and obliquely, and then vertically level the paint to make the thickness of the paint film uniform

    Finally, the moving speed of the spray gun and the distance from the object shall be controlled evenly

    The spray shall be carried out according to the specified process procedure, with vertical spray, circular spray and horizontal spray first, so as to form a uniform film with the same thickness

    The surface roughness of the paint film is characterized by uneven surface, sand like protrusion or small air bubble after the paint film is formed

    The main reasons are that there are too many pigments or too thick particles in the paint; the paint itself is not clean and mixed with sundries, so it can be used without sieving; the ambient temperature when preparing the paint is low, and the bubbles in the paint are not completely scattered and discharged; the object surface is not cleaned up, there are sundries such as sand particles, which are mixed into the paint film when painting; the containers (brush, paint barrel, spray gun, etc.) used are not clean and there are residual sundries Into the paint; construction environment cleaning and protection are not enough, there are dust, sand and other debris stuck to the brush or fell on the paint film

    To prevent the rough surface of the paint film, we also have several precautions: first of all, we need to select the paint with good quality

    Before use, we must sift it carefully, mix it evenly, and use it after there is no bubble

    Next, the surface of the object shall be cleaned to keep it flat, smooth and dry

    Then it is very important to arrange the construction sequence of each type of work reasonably to ensure that the construction environment for painting is free of sundries and dust

    Finally, it must be noted that it is not allowed to reuse the utensils filled with different models and different performance paints

    If necessary, the residues shall be removed before reuse

    The prevention methods for the sticky feeling of the paint: 1

    Mix the paint in strict accordance with the requirements of the instructions, and mix it fully before use

    2

    One time brushing should not be too thick, generally 0.5mm

    3

    Each painting must be dried and polished before the second painting

    4

    Pay attention to the change of environmental conditions, and do a good job of moisture-proof and low temperature prevention

    5

    Thoroughly remove the greasy dirt, turpentine, etc

    on the surface of the coating

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