Excessive formaldehyde is a problem that many Sumitomo residents who have just completed renovations are very worried about. According to public information:
When the formaldehyde concentration reaches 0.08~0.09mg/m? per cubic meter of air, children will develop mild asthma; when it reaches 0.6mg/m?, it can cause throat discomfort or pain in adults. . When the concentration is higher, it will cause nausea and vomiting, coughing, chest tightness, asthma and even pulmonary edema; when it reaches 30mg/m?, it will cause death immediately.
So for the sake of our living health, it can be said that it is urgent to remove formaldehyde. So today, let’s talk about how to remove formaldehyde quickly and effectively.
1./ How to remove formaldehyde quickly and effectively? Residents have their own tips
I believe we have all heard of some "homespun methods" for eliminating formaldehyde: for example, the older generation will put some orange peels or grapefruit peels at home, and they think these peels can absorb formaldehyde; Otherwise, place a lot of green plants at home to purify the air. However, these methods have actually been proven experimentally and have no effect on the elimination of formaldehyde. So, are there any auxiliary methods that can eliminate formaldehyde more quickly and effectively?
Earlier, we launched the topic "What are your methods for removing formaldehyde?" on the Haohaozhu APP. Many residents shared with us their tips for removing formaldehyde at home:
Sumitomo@Taotao Xiaoniu:
I just finished the renovation and found a formaldehyde treatment company, which cost 3,000 yuan. After the treatment was completed, I found a professional formaldehyde company for testing. All the indicators were normal and there was no The problem of exceeding the standard.
▲ Professional company processing
If you don’t know anything about formaldehyde removal, or you have less free time, it is better to seek professional help. The picture comes from Sumitomo@errui
Sumitomo@ElaineZhang:
I went to a testing agency for testing 4 months ago, and the result was 4 times higher than the standard... The testing agency told me that ventilation is the most effective, and Formaldehyde is easily soluble in water, so wash everything that can be washed. Now I have opened the doors and windows for four months on a hot day, and there is still a bit of decoration smell. I am going to test for formaldehyde again. Before testing, you can buy an industrial blower and put it in the window to speed up air convection.
▲Industrial Fan
If you want to eliminate formaldehyde in the house as soon as possible, you can put a floor fan at home after the decoration is completed, and open the windows for ventilation. This is how formaldehyde can be eliminated as quickly as possible. Volatilization is the most effective and cheapest way. The picture comes from Sumitomo @cozywen
Sumitomo @Kel131:
I bought a photocatalyst because it can be left for a few days after spraying, but be careful when spraying furniture, especially wood furniture. A little higher, and the water sprayed out must be finer, otherwise it will damage the furniture!
▲ Photocatalyst
Photocatalyst is currently the most widely used method to eliminate formaldehyde. This catalyst from Japan can undergo a catalytic reaction under ultraviolet irradiation and can decompose formaldehyde in the air. formaldehyde. The picture comes from Sumitomo@小璞璞目达Purify. Theoretically, the effect of formaldehyde removal is: open windows for ventilation; fresh air; purifier; activated carbon bags, green plants and other soil methods. The evaporation period of formaldehyde can be as long as 10 years. Based on the current outdoor air quality and winter and summer temperatures, simply opening windows for ventilation is not a sustainable method.
▲ Fresh air system
I believe everyone knows the working principle of the fresh air system, which is to purify outdoor air and suck it into the house, and at the same time exhaust indoor air. Of course, the exhausted air contains air contaminated by formaldehyde. This method is the same as ventilation, which is a way to discharge formaldehyde outside the house. The picture comes from Sumitomo @ Bloomberg slash_bo
Sumitomo @ElaineZhang:
I bought a formaldehyde purifier, but I didn’t know if it was useful at first. Later it turned out that the effect was pretty good, there was almost no smell in the house.
The bedroom and study room have the most cabinets. The sponges in these two rooms have shrunk the most and have become very small. Compared to a larger living room, the sponge in this jar does not shrink much. It should still have some effect!
▲ Formaldehyde purifier (air sponge)
Air Sponge is a formaldehyde purifier that has only emerged in the past two years. It is said to be able to absorb and decompose formaldehyde in the air. Many Sumitomo users have tested it with a formaldehyde meter after using it, and found that it can indeed reduce the formaldehyde content in the air to a certain extent, and has a significant effect on eliminating decoration odors. The picture comes from Sumitomo@Qiu Miaomiao
2./ How to choose environmentally friendly decoration building materials? See what professionals say
Although there are various methods to remove formaldehyde through post-treatment, according to the principle of formaldehyde treatment-when the formaldehyde content in a closed space is certain, through Later treatment can indeed remove more than 99% of the indoor formaldehyde. This treatment method is to react with formaldehyde to form a relatively stable polymer, but it is difficult to reach the depth of the board.
In addition, indoor formaldehyde is constantly released year after year, so the best way to remove formaldehyde must be to eliminate formaldehyde from the source. Haozhu APP decoration brand user @Jorya Jiuya described in detail how to choose more environmentally friendly decoration and building materials. Let’s take a look below.
1./ Board
From the perspective of the use of adhesives in the product manufacturing process, the smaller the internal parts of the board are, the more adhesive will be used, and the environmental protection will be lower. The worse it gets. The following is a theoretical ranking of the environmental protection of building materials based on their internal structure. (Of course, there are big differences due to different processes and different manufacturer standards.)
▲ No.1 solid wood board
No chemical components, 0 formaldehyde, the most environmentally friendly board. However, due to the relatively high construction technology requirements, the places where it can be used are relatively limited, and it is mostly used on wooden floors, doors, and furniture.
▲ No.2 Finger-jointed board
Finger-jointed board is also a very environmentally friendly board. There is no need to stick plywood up and down, and the amount of glue used is greatly reduced. The glue used for finger-jointed boards is generally milky white glue, which is non-toxic and odorless. Even if it decomposes, it is acetic acid, which is very safe. The environmental index is second only to solid wood.
▲ No.3 Large core board/blockboard
A layer of veneer is pasted on each of the upper and lower surfaces of the board core, and the wooden strips are bonded to each other in the middle. Even E1-level large core boards, if used in excessive amounts, will cause the overall formaldehyde content in the room to exceed the standard. Therefore, even if it meets the standards, it is not necessarily absolutely harmless to the human body.
The quality of large core boards on the market varies. It is recommended to buy from regular manufacturers. Comparing the craftsmanship of the same two large-core boards, the wood block in the middle is finely crushed and has a high glue content, which is very different in terms of environmental protection and functionality.
▲ No.4 Plywood
Multiple layers of single boards are glued perpendicularly to each other in fiber directions, and the amount of glue used is slightly larger than that of large core boards. Environmental protection is second only to large core board.
▲ No.5 Particleboard
The raw materials of particleboard are completely crushed into granules, also known as shavings. The particles in the middle are coarse, and the particles in the upper and lower layers are finer, and then glue is added and pressed together. Both the surface layer and the core layer have glue, so it is difficult to control the release of formaldehyde. Due to its relatively uniform structure and good processing stability, it is widely used in interior decoration.
▲ No.6 Density Board
Density board is made by completely crushing raw materials such as wood into fibers and then adding glue and pressing them together. The particles are smaller than particle board. Since the fiber units can be connected by hydrogen bonds, the bonding strength is compensated. Therefore, the amount of glue applied is not much different from that of particleboard. Environmentally friendly and the same as particle board.
According to density, it is divided into high, medium and low density boards, which are used for laminate flooring, door panels, partition walls, furniture, etc. They are as easy to process as particleboard and have a wide range of uses.
2./ ?Coatings
Indoor coatings are mainly divided into water-based coatings and solvent-based coatings, and water-based coatings are more environmentally friendly than solvent-based coatings.
Currently, most interior wall paints on the market use water-based latex paint, while wood paint used for wooden furniture uses water-based wood paint.
▲ When purchasing wall paint, you should not only choose regular products, but also pay attention to the quality inspection report of the product. There are three key environmental indicators of wall paint: VOC, free formaldehyde, and heavy metals. The above are the limit values ??for the content of each compound.
When purchasing paint: First, purchase regular products through regular channels and check the quality inspection report.
Secondly, pay attention to the outer packaging of water-based wood paint. It is generally marked with the words water-based or water-soluble, and the instructions for use also indicate that it can be diluted directly with water. Fake water-based wood paint cannot be diluted with water due to the addition of solvent components.
Furthermore, look at the color of the wood paint. There are roughly two types of water-based wood paint based on different ingredients: one is light milky white or translucent, and the other is translucent light yellow.
Finally, smell. No peculiar smell is the most obvious feature of water-based wood paint. The smell emitted after opening the lid is very small, with a slight oily aroma. Poor-quality water-based wood paint has a strong pungent solvent smell, while expired and deteriorated water-based wood paint has a more obvious sour smell.
3./ ?Wallpaper
Glue is an important factor in wallpaper pollution. Wallpaper glue should be chosen carefully. Currently, there are three common types of more environmentally friendly wallpaper glues on the market: starch glue, glutinous rice glue and barrel glue.
Starch glue and glutinous rice glue are both processed from natural raw materials and are highly environmentally friendly. However, starch glue is a synthetic glue of starch and glue, while glutinous rice glue is extracted from glutinous rice, so the adhesion of starch glue is weaker than that of glutinous rice glue. However, glutinous rice glue is not easy to mix evenly under low temperature conditions, and small lumps will appear, affecting the effect of the wallpaper.
The price of barreled glue is generally relatively expensive, because most of it is imported from Europe and the United States, and the product quality and environmental performance are very reliable. Compared with other wallpaper glues, barrel glue is more sticky.
4./?Decoration textiles
You can start from the following three aspects when purchasing decorative textiles:
First, look at the labels. When purchasing textiles with anti-wrinkle, anti-shrink and other properties, be sure to check the formaldehyde content on the fabric label. If there is no label or the content exceeds the standard, it is not advisable to purchase.
The second is to choose the suit. Do not buy textiles with bright colors or paint prints. It is better to buy light-colored textiles. The risk of formaldehyde exceeding the standard will be smaller.
The third is to smell. When buying textiles, you can open the outer packaging and smell it. If there is a strong pungent smell, it may be that there is too much formaldehyde residue and you should not buy it.
Scan the QR code to read @Jorya 玖亚 More ways to identify environmentally friendly materials → How to choose environmentally friendly boards during decoration and control formaldehyde from the source? - Live well
3./ Don’t be fooled by merchants! Are E0-level environmentally friendly materials reliable?
When purchasing decoration and building materials, we often hear merchants introduce their product grades as E0, E1, etc. In fact, these confusing codes are different limited edition labels. The so-called E0 level is the most stringent formaldehyde release standard. So if you only recognize E0 when buying building materials, will everything be fine?
In fact, this is not necessarily the case. You must know that different products in different countries have different standards for the amount of formaldehyde released. Sumitomo @NOIDEA has conducted in-depth research on the formaldehyde release standards of different countries and how the current domestic formaldehyde limits are stipulated. Let’s take a look at his survey results:
The domestic standards for formaldehyde release are based on It comes from European standards and Japanese standards. Currently, the formaldehyde emission level written into the national standards has three indicator levels: E0, E1, and E2. At present, the domestic standards related to formaldehyde release mainly include the following:
▲ Click to see a larger image.
?"GB 18580 Formaldehyde release limits in artificial panels and products for interior decoration materials" (2001 standard)
The latest version of this standard is GB 18580-2017 (implemented on May 1, 2018). , made such adjustments to the amount of formaldehyde released:?
▲ Click to see a larger image. ?"GB 18580-2017 Formaldehyde Release Limits in Artificial Panels and Products of Interior Decoration Materials" (2018 Standard)
Yes, the new standard only has one level of E1, and the measurement method has been revised According to the regulations, the climate chamber method is used to measure, and the limit value is 0.124mg/m3. The new standard is increasingly in line with international standards. ?Since E0 does not appear in GB 18580-2001 and GB 18580-2017, in which standards does E0 appear?
▲ Click to enlarge the image. ?"GB/T 5849-2006 Blockboard" ▲ Click to see a larger image. ?"GB/T 18102-2007 Impregnated paper laminated wooden floor"
Impregnated paper laminated wooden floor is what we usually call laminate flooring. Among the formaldehyde release requirements for laminate flooring in the standard, it is The E0 level appeared, stipulating that E0≤0.5mg/L. The E0 level also appears in the formaldehyde emission limit for blockboards.
In other words, E0 in the above two standards has its own specific boards - laminate flooring and blockboard. The E0 level claimed by other boards such as ecological boards and solid wood particle boards we see is actually just a marketing tool for merchants and brands and has no basis in national standards.