What are the causes of peeling, paint stripping and blistering of epoxy flooring?

Discoloration: improper selection of curing agent, uniform grinding of grinding material, wrong choice of pigment.

Peeling: Improper surface treatment, the surface of the substrate is too smooth, the coating is too long apart, and the surface is not treated again when reapplied.

Blistering: Blistering is one of the traces left by the gas trapped in the coating film or the gas produced by the reaction or the gas produced by the volatilization of the internal solvent during the coating process. Slow solvent evaporation, faster drying of the surface layer, too much viscosity of the paint, too much curing dose, too much agitation, and too fast movement of the tool when applying are all causes of foaming.

1. Cause of blistering: The ground contains too much water and does not have a waterproof layer.

Prevention: The first floor must be waterproofed, the wet floor must be baked with a blowtorch, and a moisture-proof system must be used.

Second, the reason for the color blistering: the ground oil is too heavy.

Prevention: It is recommended to knock out the old ground and make a cement floor again, and remove the oil stain first if the oil stain is not too serious.

1. Reason: epoxy floor paint.

Basic surface treatment before painting.

Not good, there are oil, wax, water vapor, dust and chemicals on the surface of the base of the coated object, or the interval between surface pretreatment and painting application is too long.

Treatment: The surface of the coated object should be treated and cleaned before painting, and it should be painted immediately.

2. Reason: Improper selection of primer. If the hardness of the primer is too large, the adhesion between the topcoat and the primer will be lost.

Treatment: A primer with good adhesion and wetting should be selected.

3. Reason: The surface of the coated object is too smooth.

Treatment: The surface of the coated object should be sanded or chemically treated. The old paint surface should be re-sanded.

4. Reason: If the primer is covered with topcoat or varnish before it dries, the coating film is prone to cracking or falling off.

Treatment: Generally, the primer should be completely dried before covering the topcoat.

5. Reason: The coating film is too thick, because the surface layer has dried thoroughly, and the bottom layer dries slowly or not thoroughly, and the topcoat shrinks too much during the drying process, causing cracking and falling off.

Treatment: During construction, it should be noted that the paint film of each paint should not be too thick.

6. Reason: Coating on the surface of damp or mildewed objects makes the paint adhere poorly to the substrate.

Treatment: Masonry, cement and other surfaces should be fully dried and mildew stained before painting.

The main reason for the cracking, peeling and peeling of epoxy floor paint coating is due to poor adhesion and combination between coatings, resulting in problems such as coating peeling, peeling, bulging and peeling.

Causes:1Improper selection of materials results in poor adhesion between the base layers.

2.Improper handling of the foundation ground.

3.The surface of the foundation is unclean, with oil, water or other dirt.

4.The epoxy floor paint base and top coat are not matched, resulting in poor interlayer adhesion.

5.The construction temperature of epoxy floor paint is too low.

6.In the epoxy floor paint primer is not fully dried, the next process is constructed, and the shrinkage rate of the primer surface layer is inconsistent, resulting in cracking, which affects the interlayer adhesion.

The causes of blistering of epoxy flooring are as follows:

1. The cause of the blistering of the surface layer of the epoxy floor may be caused by excessive moisture. If the air humidity is too high during construction and the reaction speed is too fast during the drying process, then large and small bubbles may appear on the surface.

2. There is a very important period in the construction process of epoxy flooring, that is, the curing process. If the viscosity in the mixture is too high, it may cause the gas to not be discharged after application, and bubbles may form.

3. If there is no uniform coating and scraping during the scraping process, bubbles may also appear. Therefore, the construction personnel inspect the construction site after construction, and deal with bubbles in time if they are found to prevent bubbles from appearing after curing. If air bubbles are found, you can use a defoaming roller to eliminate the air bubbles, and then proceed to the next step of construction after the elimination is completed.

Epoxy floor construction precautions are pants

1. Before construction, the ground on the site should be polished to maintain the flatness of the ground. At the same time, the dust on the floor should be cleaned regularly, so that the application effect of epoxy flooring will be better.

2. The coatings, adhesives and other flammable materials of epoxy flooring should be stored away from the fire source or high temperature area, and ensure the dryness of the environment.

3. If there are special circumstances in some places and it is necessary to carry out operations during the construction process, an isolation area with sufficient space should be set up to prevent dust, gravel, etc. from seeping into the ground under construction.

Epoxy floor paint has always been a ground decorative coating with high utilization rate in the floor industry due to its high hardness of paint film, good adhesion, strong adhesion between the coating and cement, wood, metal and tile surface, and good wear resistance and impact resistance. And in the actual use process, supporting primer, middle coat, mortar, etc., in order to achieve a good coating effect.

In a period of time after the construction of the floor paint is completed, there are adhesion problems between some epoxy resin floors and the base layer, such as: epoxy floor coating peeling, peeling, peeling, peeling.

The main reasons for the peeling of epoxy resin floor paint and detachment from the base layer are as follows:

1. Improper treatment of the base layer: there are other impurities on the ground, such as oil stains, water dissolved substances, rust stains, etc., which are not cleaned; or the smoothness of the base surface is too high, no brushing has been carried out or an inferior sealing primer has been chosen.

2. The recoating time between the coating layers is too long: during the construction process, the interval between the construction is too long, resulting in dust impurities continuing to appear on the ground surface.

3. The coating film is too thick: because the surface layer has dried thoroughly, and the bottom layer has dried slowly or not thoroughly, cracking and falling off due to excessive shrinkage of the topcoat during the drying process.

4. The moisture content of the base layer is too high: if the construction is carried out on the ground with too high moisture content, there will be a risk that the epoxy floor paint layer will be separated from the ground, and the lower the moisture content, the better the bonding performance.

5. The base is too loose: for the loose ground, the loose layer should be removed before construction, otherwise the epoxy floor coating will fall off with the loose concrete layer.

6. There is no drying treatment on the base surface: or the drying treatment is insufficient, resulting in the phenomenon of unstable coating falling off when the floor paint manufacturer is carrying out the floor paint construction.

Methods to prevent peeling and peeling of epoxy resin floor paint:

1. The floor paint construction unit needs to clean the surface of the ground that is about to be constructed, and the oil and debris on the foundation ground must be cleaned up.

2. After dealing with the base surface, the time to wait for the construction of the floor paint can not be too long, generally about 3 or 4 hours, and the construction will begin. It is also possible to dry the ground at the same time.

3. It is necessary to choose high-quality primer materials with good adhesion to ensure that its adhesion can adapt to the base material.

4. The strength of the cement floor needs to be above C25, and if the sand and ash phenomenon is serious, it must be reinforced before the epoxy floor paint construction can be carried out.

5. The basement and other places must be made of waterproof layer, and the new cement floor must be maintained for more than 28 days to ensure that the moisture content is not higher than 8% before the epoxy floor paint construction can be carried out.