This is the correct way to close doors and windows after renovation. At this time, if the window is opened for ventilation, it will change the indoor humidity, so that the curing reaction time between the building materials and the base layer is too short, resulting in insufficient bond strength, resulting in empty bulging foaming phenomenon.
When decorating houses, a large number of synthetic resin-based products are used, such as paint, wallpaper glue, white latex, etc., and there are also some products based on cement and rubber powder, such as putty powder, mortar, etc. These products require a slow release of moisture to achieve the strongest bond strength, so curing time is necessary.
If the window is open at this time, the existing indoor humidity environment will be changed. Under the action of ventilation, it will take away some moisture, thereby reducing indoor humidity.
In order to balance the indoor humid environment, water is released from the surface and base layers of various materials and volatilizes into the room. The volatilization of water accelerates the curing time of the bond layer, reduces the bond strength, causes the shrinkage of surface materials such as paint and wallpaper, and produces appearance problems such as dry cracks and wrinkles.
In fact, invisible dangers exist. Cement mortar cement should be used when laying bricks with a long curing reaction time. If the moisture on the surface of the tile evaporates too quickly, the mortar layer will release moisture through the small aperture of the tile, causing the water diversion loss of the bond layer, and completing the maintenance reaction in advance Is also the reason why we often see the tile surface and the bond layer being smoother after the tile is hollowed out.
The curing reaction of organic matter is the source of formaldehyde release. Ventilation can only change the indoor formaldehyde concentration
Urea-formaldehyde resin is the resin with the greatest synthetic value in the decoration process Urea-formaldehyde resin is a polymer compound synthesized under specific conditions of formaldehyde, urea and additives. It is the main raw material for coatings, adhesives and other products.
When the urea-formaldehyde resin in the coating is cured, the surface of the coating will have better toughness and tension; when the urea-formaldehyde resin in the adhesive is cured, the bond strength will be stronger.
When the urea-formaldehyde resin solidifies in the material, it causes a reverse reaction, from which formaldehyde molecules are separated and free formaldehyde is released indoors. The curing reaction is the process of releasing formaldehyde from high to low.
After the initial solid phase reaction, the gum layer reaches a certain binding strength and begins to enter the slow release period of formaldehyde.
The main window is to let free formaldehyde be blown away by the wind, reducing the indoor formaldehyde concentration. In fact, when you buy a material, the formaldehyde content in the material is already there. With the prolongation of the curing time, the release of formaldehyde is slow, and ventilation cannot change the formaldehyde release concentration of the release source.
Since the curing reaction time of each building material is different, the "gas chamber" is correct within a few months after the renovation.
After the decoration is completed, the doors and windows are closed for a few days to balance the indoor humidity and let various materials slowly solidify in the same humidity environment to achieve the most perfect effect.