Popular science: What is the source of formaldehyde pollution from indoor decoration?
Speaking of decoration, for the health and safety of the family, it usually takes several months to move in. Therefore, the problem of home decoration pollution has to be faced, and it is worthy of attention. Toxic substances such as formaldehyde, benzene series, ammonia, radon, TVOC, etc. will remain in the air after the storage time.
One of the biggest sources of formaldehyde is the paint used in interior decoration. Wall coatings are frequently used in home decoration. Walls are a large source of formaldehyde.
1. Wall paint
The first step of wall treatment is to apply a layer of glue to the cement wall. The purpose is to improve the bonding strength and adhesion between the mortar and the base of the wall, so that the base of the wall is fully moistened, more dense, firm and reliable; a house of 100 square meters About 40 kg can be brushed.
The second step is to brush the ordinary paint three times and then paint the latex paint. The content of volatile organic solvents and formaldehyde adhesives in the paint is very high: about 30 kilograms can be used for a house of 100 square meters, and the glue content in latex paint is about 3 kilograms.
(Science: In 2001, because the formaldehyde content in 107 glue seriously exceeded the standard, the Ministry of Construction included it in the list of eliminated building materials and banned its use in home decoration. However, due to the low cost and special performance of 107 glue , Is still used.)
The wallpaper itself contains formaldehyde, and in the process of pasting the wallpaper, you must first brush a layer of base film with a high formaldehyde content to prevent mildew; then brush the unknown glue before you can paste it.
(Popular science: Some merchants promote the use of glutinous rice glue, which is edible and definitely does not have formaldehyde. Then why can the shelf life of the glue made from glutinous rice be as long as several years? The reason may be the addition of formaldehyde with anti-corrosion function. The longer the shelf life, the higher the formaldehyde content.)
3. Colored paint
Some people don’t like white walls very much. In order to increase the warmth and creativity of the room, they will paint the walls with different tones. These paints not only contain formaldehyde, but also benzene series. Generally speaking, benzene series are harmful. Far more harmful than formaldehyde.
The content of formaldehyde in wooden furniture is high. If you want to install wooden furniture at home, you must pay attention to the environmental protection of the board. Furniture is a long-term source of formaldehyde:
4. Sheet furniture
Because the cost of solid wood furniture is too high, most of the furniture will be made of relatively cheap density board, veneer, melamine board, baking varnish board, particle board, etc. These boards are generally made of wood residues as the main raw material. After crushing, harmful urea-formaldehyde resin glue and additives are added to high-temperature compression. Finally, the finished boards are pasted with glue and edge-sealing. These artificial boards are made into various types of artificial boards. All kinds of furniture. (The release cycle of formaldehyde in board furniture can be as long as 3-15 years)
Some merchants will choose to use inexpensive urea-formaldehyde resin glue in the process of making board bonding. When these toxic glues are bonded to the board, the formaldehyde cannot completely react, and they will exist in the board and glue in a free state; With the change of time and surrounding environment, the glue will also age and split, resulting in the secondary release of formaldehyde.
Solid wood furniture
The solid wood furniture itself does not contain any pollution sources. But the surface needs to be varnished or painted to produce harmful substances such as formaldehyde and benzene.
The source of indoor formaldehyde is mainly decoration materials. In the final analysis, it is the glue containing formaldehyde used in the material. Even if the environmental protection material is not equal to zero formaldehyde and no formaldehyde, even if all environmental protection materials are used in the decoration process, the superimposition of formaldehyde cannot be avoided, which will cause harm to the human body in the long run.
The hazards of formaldehyde pollution caused by indoor decoration must be paid attention to. If necessary, professional indoor formaldehyde pollution control agencies can measure the concentration of formaldehyde and treat the formaldehyde in time to reduce it to the safe concentration specified by the state. Especially if there are pregnant women and babies at home, don't rush into the new house decoration.