Used diatom mud formaldehyde is exceeded? lie?

With the improvement of living standards, people’s consumption concepts have undergone major changes. Environmental protection and low carbon have become the trend of modern home improvement. Among them, an environmental protection coating called diatom mud has become the focus of many young people.

Diatom mud originated from Japan and entered the Chinese market in 2003. It is said that this kind of natural interior wall decoration material, which was specially developed for the purpose of controlling indoor pollution, uses diatom soil formed for millions of years as a raw material, has strong adsorption and ion exchange properties, has odor eliminating, fire retardant, Modulation of humidity, decomposition of formaldehyde, sterilization, heat insulation, energy saving, noise reduction and other functions, so greatly sought after.

However, diatom mud products on the market are uneven, not only the price gap, but also difficult to distinguish between true and false, so that consumers want to buy and dare not buy. Many people doubt that the so-called "green paint" is just a beautiful lie?

Diatom mud was used but formaldehyde exceeded three years ago, Chen Xinwen home renovation, in order to protect the environment, he specifically chose diatom mud as a wall paint. "At that time, there were not many people who used diatom mud, the price was not cheap, and they were a lot more expensive than wallpapers, but I wanted to spend money for family health and it was worth it, so I bought it."

Chen Xinwen told reporters very remorsefully: "I never expected that after painting the diatom mud, I went to a professional agency to test it. Formaldehyde was seriously exceeded, and I asked the seller. The seller said that the diatom mud itself was formaldehyde free. But in the process of putting on the wall, the glue is needed. The glue contains formaldehyde. Is this not a pit person? In order to put an end to the troubles, he finally had to find someone to remove all of the diatom mud and redo the latex paint.

"Diatom mud need glue wall?" Reporter with Chen Xinwen's doubts, ran several Hangzhou diatom mud brand stores. Some sellers said that diatom mud itself is mud, not sticky, on the wall requires glue, but not much use, will not exceed formaldehyde; some sellers said that Chen Xinwen is to buy fakes.

The sales staff of the "Lan Shee Diatom & Mud Store" on Gudun Road in Hangzhou told reporters categorically: "That must be false! The diatom mud really does not need glue on the wall." The salesman said that the diatom mud It contains diatomaceous earth, just like cement, as long as you add a little water, it is sticky and can be painted directly on the wall. You can watch it on the spot while the worker is working.

The sales staff of the “Keluosiwei diatom mud store” in Hangzhou New Era Decoration Plaza also confirmed this view: “The real diatom mud is directly added with water and can be put on the wall without adding glue.” But the sale Personnel also revealed that about 80% of the diatomaceous earth is diatomaceous earth, and the remaining 20% ​​added special chemical materials such as Titanium dioxide and other photocatalysts. “Only a reasonable amount of photocatalyst can be added to allow diatom mud to fully exert the decomposition of formaldehyde. In addition, there will be some gelatin, which is animal glue, non-toxic, just to increase the viscosity."

“The fake diatom mud is made of diatomaceous earth adhered to the wall with chemical binders of different compositions. This practice seriously blocks the molecular structure of diatomaceous earth, and it cannot exert the diatom mud to adsorb and clean the air. And adjust the role of humidity, diatom mud will lose the 'healthy and environmental protection' performance." "Qian Jiamei diatom mud," the sales staff said, more seriously, a thick layer of chemical bonding The mixture of diatom mud walls, will continue to release a variety of harmful gases pollute the indoor environment, and the release time is longer than the traditional latex paint, "So we are using no glue on the wall technology."

The domestic diatom mud market chaos reporter interviewed a large number of renovation building materials market, found a wide range of diatom mud, all brands say that their own is the best, but what brand of diatom mud is best? Diatom mud in the end is Not really environmental protection? These have become consumers' questions.

The current chaos in the diatom mud market has caused many consumers to "not pay for it." For example, although they all claim to be diatomite from Changchun, Jilin Province, the price difference is three or four times. The cheaper 890 yuan is one square meter, and the expensive one is two or three hundred or even four or five hundred square meters. There is an ultra-low price of 50-60 yuan a square meter.

Moreover, although diatom mud merchants have all played the banner of “breathable walls,” “natural and pollution-free,” and “one wall is better than a green forest,” they advertised the environmental protection function of their own products, but none of the above-mentioned effects of the products can be realized. To provide evidence, many sales staff just said, “There is no way to demonstrate on the spot, but you can rest assured that after the house is completed, you can find a professional testing agency to detect it. If there is a problem, our business is fully responsible.”

Between each brand, it is also a “stuphold”. Some brands have added a photocatalyst to allow diatom mud to fully play its role in the decomposition of formaldehyde; while other brands have expressed that high-purity diatom mud can release itself negatively. Oxygen ions, which can decompose and adsorb formaldehyde, do not require chemical additives, and claim that “chemical additives will block the gaps in the diatom mud and also release formaldehyde, causing secondary pollution.”

Even more confusing is that some of the interviewed brands such as "Dajin" and "Quanjiamei" and other businesses said that as long as it can be scraped and reused is real diatom mud, otherwise it is mixed with putty powder or shell powder. “Keluosiwei” and other brands claim that their diatom mud cannot be reused after being on the wall, because diatom mud is a natural and non-preservative agent. After adding water, it will degenerate and produce bacteria and stink.