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Floor epoxy mechanical analysis of epoxy floor coating from the "prickly heat" reason
Release time:
2023-11-10 16:49
MeichengeFloor epoxy machineryTo tell you, and epoxy floor coating surface blistering is very similar to the ills of the coating "prickly heat", because the "prickly heat" shape and blistering is very similar, but generally small, the cause is also somewhat similar to the secluded slightly, there are different.
The main causes of prickly heat are:
A, paint on the substrate wetting ability is not enough, or the substrate treatment is not clean;
B, solvent volatilization too fast, use too fast thinner or heating too fast;
C, single-layer construction is too thick or each interval is too short;
D, polyurethane paint contains moisture or dry in a humid environment;
E. Baking paint shall be constructed below 5 ℃;
F, the film is not completely dry that is exposed to a humid environment (completely dry may also occur).
MeichengeFloor epoxy machineryTell you, the formation of prickly heat is more complex, the most likely to cause prickly heat is the solvent retention and moisture. In a higher temperature environment, severe solvent volatilization and strong solvent retention will cause solvent vapor to stay in the coating film, thus forming prickly heat. At a lower temperature, the wet coating film has poor fluidity, especially the surface temperature is lower due to solvent volatilization, which makes the fluidity worse, and it is better to cause solvent vapor to stay. In addition, moisture is also easy to cause prickly heat. The moisture in the paint and the moisture in the construction environment are uniform prickly heat, however, prickly heat caused by moisture erosion of the coating is often uneven and has a certain pattern like insect crawling.
Precautions:
A, improve the film dry, so as to improve the film solvent release;
B, avoid the bottom temperature under the construction of dry;
C, reduce the solvent polarity, thereby reducing the ability of the film to retain the solvent;
D, the use of the correct surface additives, improve the surface permeability;
E, use the correct diluent and curing agent.
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