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Factors affecting coating quality of imitation aluminum alloy door and window coatings
Editor: liefan, November 10, 2019 17:00:01

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The imitation aluminum alloy door and window coating has excellent decoration and reliable safety, but improper material selection and nonstandard construction often cause the coating to bloom and crack. The correct selection of coating materials is the primary factor to ensure the success of the coating of imitation aluminum alloy doors and windows, and the key to prevent film cracking and blooming is to improve the selection and proportion of putty. The multi-layer putty with different functions is prepared to enhance the adhesion, flexibility and smoothness of the putty. The method of multiple leveling and gradual change layer by layer is adopted to release the deformation of cracks layer by layer, so that the coating surface is difficult to crack. The formation of high evenness putty surface can prevent uneven luster of aluminum alloy doors and windows decorative surface.

Shanghai liefan decoration materials Co., Ltd.: factors affecting coating quality of imitation aluminum alloy door and window coatings?

Coating Cracking

The coating of imitation aluminum alloy doors and windows has a high requirement for flatness, which greatly increases the thickness of putty layer. However, ordinary putty and thicker putty layer are more likely to crack after wind blowing, rain and alternation of dry and wet. Cracks not only affect the quality of decoration, but also affect the performance and life of imitation aluminum alloy door and window coatings.

In order to prevent the cracking of the coating surface, the putty for exterior wall coated with imitation aluminum alloy doors and windows should have certain flexibility to cover the fine cracks in the base course, eliminate the stress between the wall and the coating, release the crack deformation layer by layer, so as to make the coating surface difficult to crack.

1 coating peeling off

Coating peeling off may be due to improper treatment of the base course, such as the dirt, rust and chemicals on the surface are not cleaned up; or the coating is applied before the primer is completely dry; or the coating is too thick, and the coating is applied on the wet or moldy base, and the adhesion between the coating and the base is poor, which may cause serious cracking of the coating, or even peeling off.

Uneven gloss of film

Smooth base surface is the most basic requirement of coating, but in the actual construction, the base surface of coating is often not smooth, and it shows wavy shape under sunlight, especially after coating high gloss coating, this phenomenon is more obvious. The unevenness of the base causes the uneven luster of the coating, which has become a common quality problem in the coating of imitation aluminum alloy doors and windows.

The method of secondary plastering with common putty can not meet the requirements of high evenness base course, but should be realized by selecting various putty with different functions and adopting multiple leveling method.

Blistering, pinholes, wrinkles and other defects appear in the film

The coating defects also have certain influence on the decorative effect of imitation aluminum alloy door and window coatings,

Shanghai liefan decoration materials Co., Ltd.: do you understand the above analysis and have any questions? If you have any questions, please consult our online customer service or call us!


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