People who decorate and remove formaldehyde 99 hav

2022-07-22
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Mixed decoration industry for many years, we can definitely tell you that the so-called zero formaldehyde of businesses does not exist, but is just a publicity gimmick. Unless all choose to use solid wood for decoration, otherwise, it is a common phenomenon that formaldehyde exceeds the standard in decorated houses, especially in summer. Formaldehyde removal in decoration is inevitable. Before decorating and removing formaldehyde, we should not only understand the source of formaldehyde, but also know whether the method of distinguishing formaldehyde is true and effective. Here, I'll give you a detailed summary

mixed decoration industry for many years, we can tell you with certainty that the so-called zero formaldehyde of businesses does not exist, but is just a publicity gimmick. Unless all choose to decorate with solid wood, otherwise, it is a common phenomenon that formaldehyde exceeds the standard in decorated houses, especially in summer. Formaldehyde removal in decoration is inevitable. Before decoration and formaldehyde removal, we should not only understand the source of formaldehyde, but also know whether the method of distinguishing formaldehyde removal is true and effective. Here, I'll give you a detailed summary

the main source of formaldehyde in decoration

generally speaking, various man-made boards, such as plywood, blockboard, particleboard, medium density fiberboard, and adhesives used in the decoration process are the main sources of formaldehyde. These are reflected in home decoration, mainly in furniture. In fact, most of the artificial board furniture contains formaldehyde. See the following figure, the composition of the board:

the main source of formaldehyde in artificial board furniture is the paint layer of the board and the adhesive added in the process of making furniture with artificial board. The formaldehyde in the paint layer doesn't need me to say more, mainly about the adhesive. At present, there are three kinds of adhesives used in the artificial panel process: urea formaldehyde resin, phenolic resin and melamine formaldehyde resin. The name has something to do with formaldehyde. These glues will be constantly released in the process of using furniture

from a professional point of view, the amount of adhesive used varies with the plate structure. In fact, the amount of adhesive density board > Particleboard > Blockboard > Plywood > Multi layer solid wood joint plate > Veneer > Solid wood board

it's not to panic you, but it's true that formaldehyde can't be dissipated for ten or eight years, so choosing environmentally friendly and healthy furniture is really responsible for the health of your family

● choose furniture whose formaldehyde emission meets the national regulations. At present, the health standards used to monitor and define formaldehyde emission in China have two levels: E1, E2 and E3. Choose furniture that meets the E1 level environmental protection standard. The E0 level in the mouth of some businesses is actually equivalent to E1 level, just for publicity, and has no advantages

● ? Whether composite or solid wood furniture has formaldehyde. Composite is multi-layer board bonding, there is glue, so there is formaldehyde. If there is paint on the surface of solid wood, there is formaldehyde. In summer, when the indoor temperature rises in the sun, the taste is more obvious. There's no way. Whether to buy or not, just choose a trustworthy brand as much as possible

in addition, formaldehyde pollution is also serious in paints, textiles, etc. everyone knows the formaldehyde in paints. Now the paint market is relatively transparent. Choosing reliable big brands and seeing the certification clearly can actually be used with confidence

formaldehyde removal in decoration the harm of formaldehyde to human body

although formaldehyde is an irritant gas, it actually has no taste. As the most important and grinding indoor pollution source, it is not that it is toxic, but that it can be released continuously for a long time and slowly, with a release cycle of up to 3-15 years. And if it exceeds the standard by 2-3 times, you usually can't smell it! If you can smell it, it is seriously over standard! The harm of different concentrations of formaldehyde to human body, see for yourself

more than 6 may lead to pulmonary edema. If it reaches 30, it can immediately cause death

here, I really want to persuade you, Jane decoration! More ventilation! Spend more time thinking about choosing home decoration building materials and say no to formaldehyde from the source as much as possible

evaluation of formaldehyde removal methods in decoration

if the source of formaldehyde cannot be eliminated at the source, can we only allow formaldehyde to act recklessly

of course not

formaldehyde removal in home decoration is a long-term operation. When you search the methods of formaldehyde removal in online decoration, you will find various tips, but is it really useful? Let's evaluate one by one

1. Adsorption of formaldehyde by bamboo charcoal, activated carbon and diatom mud

practicality: ★

can it be adsorbed? Yes, but there are two conditions. One is that air flow is required to make formaldehyde contact these adsorption carriers; Second, the contact area should be large. However, the problem with adsorption is that it will release after saturation, that is, when these materials absorb enough formaldehyde, if the temperature rises, it will release the originally absorbed formaldehyde, causing secondary pollution

2. Green plants absorb formaldehyde

practicality: ★

some green plants can absorb formaldehyde, such as Chlorophytum comosum. Studies have shown that if the formaldehyde concentration is 0.5 mg/m3 in a room of 100 square meters and a floor height of 3 meters, one Chlorophytum comosum needs to work for 1 year to absorb free formaldehyde, which is not the amount of continuous release of plates. In other words, raising dozens or hundreds of Chlorophytum comosum in your family may be a little useful in theory

3. Photocatalytic decomposition of formaldehyde

practicality: ★

if adsorption is not good, can formaldehyde be decomposed? Photocatalyst can decompose formaldehyde into water and carbon dioxide. Not to mention that this thing may have secondary pollution, it may not be able to buy real goods. In addition, Photocatalyst formaldehyde removal requires a necessary environmental condition: ultraviolet light

however

① the number of ultraviolet rays required by photocatalysts is not enough to meet the ultraviolet rays in the sun, and the house needs to be covered with ultraviolet array lamps to meet

② the formaldehyde that photocatalyst can treat is only the formaldehyde around it, which can't be treated beyond a few centimeters

③ photocatalyst particles are the -10 power of PM2.5, which is a new air pollutant for the home environment

④ at present, most domestic photocatalyst products cannot remove formaldehyde for a long time, and can only be maintained for oneortwo months. Japanese photocatalysts are mainly used for building exterior walls, and are not used for formaldehyde removal in homes

4. Formaldehyde removal products

practicality: ★★

there are also special formaldehyde removal products on the market. For example, formaldehyde scavengers rely on chemical reactions “ Get rid of ” Formaldehyde. The essence of this method is to oxidize formaldehyde into formic acid, but it is easy to decompose itself. Spraying it on the wood will damage the wood, not to mention, and it will lose its efficiency within a few hours, which is impossible to achieve “ A spray of Yongyi ”. Moreover, the high concentration of hydrogen peroxide sprayed into the air will cause new pollution hazards to people. Other oxidants and reductants can not effectively remove formaldehyde, and will introduce similar new pollution

5. Ventilation through windows

practicality: ★★★★

in fact, the most useful method is dilution. Low formaldehyde concentration is safe. The most commonly used method of dilution is ventilation

formaldehyde has two characteristics, one is that it releases faster at high temperature, and the other is that it is easily soluble in water. Under the conditions of high temperature, high humidity and negative pressure, the decomposition and emission of formaldehyde will be accelerated. High temperature, such as turning on the air conditioner and heating in summer or indoors; High humidity, turn on the humidifier; Negative pressure, in addition to opening windows for ventilation, you can spend about 300 yuan to buy an exhaust fan to exhaust outside

some people have done tests in their new home, turning on the hot air conditioner, turning on the humidifier, and using the air volume of 520m³/H exhaust fan, 24 hours non-stop, 10 days later formaldehyde concentration reduced by half, and does not rebound. In fact, summer is a good season to remove formaldehyde

5. Fresh air system

practicality: ★★★★

the favorite way of local tyrants. Opening windows for ventilation is very suitable in summer, but in winter, it seems a little unsuitable. If the decoration budget is not tight, it's better to spend twenty or thirty thousand to install a fresh air system, which can not only bring outdoor fresh air into the room continuously, but also pass through PM2.5 filtration and heat exchange to ensure that the indoor temperature is not lost

6. Air purifier (including activated carbon filter screen)

practicality: ★★★★★

the air purifier was not originally aimed at formaldehyde, but formaldehyde pollution has been fried in recent years. The activated carbon filter screen in the air purifier can physically adsorb formaldehyde. Although the adsorption is less, it is still somewhat effective. However, it should be noted that in order to prevent secondary pollution, the activated carbon filter screen should be replaced regularly, generally once every 7-8 months

there are so many methods mentioned above, but personally, I think the most effective way to remove formaldehyde in decoration is ventilation. If there is no condition to install a fresh air system, maybe you can try indoor heating, humidification and ventilation. The budget is small and effective

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