Diatom mud environmentally-friendly wall materials have been increasingly sought after in recent years, but due to the lack of standards in the industry, some unscrupulous companies have taken the opportunity to speculate and the market is chaotic, and this situation is expected to be contained. The reporter got news from the China Building Materials Federation Ecological Building Materials Branch, China's first diatom mud industry standard - "diatom mud decorative wall material." Experts pointed out that after the introduction of the standard, the production of enterprises will be standardized, the consumption of the people will be more understandable, and the supervision of the quality inspection department will be based on evidence, and the diatom mud market is expected to be more standardized.

â–¡ Market status

Product popularity is chaotic

Director of the Environmental Functional Materials Research Office of the China Building Materials Science Research Institute and Secretary-General of the China Building Materials Federation Ecological Environment Building Materials Branch, Zhi Zhijiang, has been committed to the promotion of diatom mud, a new type of wall material and the formulation of industry standards. According to its introduction, diatom mud, as a new type of decorative material, has outstanding environmental protection characteristics. It has been favored by many consumers since its inception, and the market has developed rapidly.

However, due to the lack of standards before, there have been many chaos in the market. He introduced that the most typical ones are some companies that detach from the actual propaganda or exaggerate the function of diatom mud: Many merchants have put the diatom mud on the unneeded functions, such as reusable, can decompose formaldehyde for life, etc. Self-technical innovations, such as “no glue on the wall”, are actually difficult to justify; some companies have added other concepts to diatom mud, but in fact “adding kelp powder to diatom mud has no practical effect.” Many companies have added gimmicks to their products and even applied for patents, but they have no practical effect.

â–¡New standard interpretation

New standard strict function is more clear

“A promising new product must have relevant regulations in order to develop healthily, and the industrial and commercial supervision department also needs the basis for supervision. This has given birth to this industry standard.” Introduction to Zhi Zhijiang, “Diatomite Decorative Wall Materials” (JC/2177 -2013) As the first diatom mud industry standard in China, it was officially approved by the Ministry of Industry and Information Technology in May 2011, and will be officially implemented on September 1 this year. The standard has a clear definition of diatom mud, and its use, functionality, and environmental protection have clear regulations.

■正名

In this standard, the diatom mud is clearly defined for the first time: “The inorganic cement material is the main bonding material, the diatom material is the main functional filler, and the dry powder interior wall decoration coating material is prepared.”

The definition defines the main components of the product so that the consumer can clearly understand what the diatom mud is. Zhai Zhijiang explained that although the regulations indicate that inorganic gelling materials are the main bonding materials (white cement, gypsum, white lime powder, etc.), organic additives may also be added for the consideration of construction performance (organic addition is also added to concrete). Agent), but volatile organic compounds cannot exceed the standard.

Another important point in the standard is the provision of diatomaceous earth in diatom mud products. “The so-called diatom mud produced by some manufacturers does not have diatomite components at all.” The standard states that diatom components should be “detectable”. Qi Zhijiang explained that the reason why the specific quantity is not marked is because if the diatom composition can be detected in the unit quality product, it means that it accounts for at least 10%. "This is in line with the basic requirements."

â– Performance explanation

Qi Zhijiang said that diatom mud, as a functional wall material, needs to meet the four points of usability, decoration, functionality and environmental protection. In the standard, most of the above properties are also clearly defined.

Usability: First of all, diatom mud must have a certain bonding strength. Therefore, inorganic gelling substances must be added to the material. Secondly, the product also needs to have certain temperature and humidity resistance, mainly to ensure that after the diatom mud is applied to the wall, it will not age or fall off after periodic temperature and humidity changes in the actual use environment.

Decorative: diatom

The shape of the mud is varied, so there are no special requirements for the standard.

Functionality: Many merchants in the market will blow the function of diatom mud in the market, environmental protection, decomposition of formaldehyde, humidity control, noise reduction, antibacterial, fresh air and so on. In this standard, the specific functions of diatom mud are clarified and quantified. The standard has clear regulations on the purification performance of formaldehyde and the durability of formaldehyde purification.

Anti-fungal: The standard must be level 0. Qi Zhijiang explained that this regulation has a lot to do with the formulation of diatom mud. If there is organic rubber powder or other organic substances in the formula, the possibility of growing mold is relatively large. Therefore, the anti-fungal properties of the product are defined in the standard. The diatom component itself does not grow mold.

Humidity control performance: Because the diatom mud has good respiration performance, when the air humidity is high, it can absorb some moisture in the air, and when the air is dry, it will release part of the moisture to adjust the indoor humidity. This feature also has quantitative provisions. “Simply, it is to see how much the moisture absorption and desorption is in a certain environment within 24 hours.”

Environmental protection: Diatomaceous earth itself is free of harmful substances such as formaldehyde and benzene. However, after adding other substances to make diatom mud, the standard limits strict limits on harmful substances. The standard states that harmful substances are below the detection limit, ie volatile organic compound content <1g/kg; total benzene, toluene, ethylbenzene and xylene <50mg/kg; free formaldehyde <5mg/kg; soluble heavy metal <10mg/kg .

Qi Zhijiang explained that for the laboratory environment and the natural environment, free aldehydes may exist, and there is no guarantee that formaldehyde and other substances are not present in the diatom mud products. Therefore, the limit is also regulated. Soluble heavy metals may also be present due to the possible presence of mineral powder in the wall material. For indicators of hazardous substances, the standards must be specified.

â–¡ Prospects

New standard to promote consumption more peace of mind

Qi Zhijiang said that after the implementation of "Diaphragm Decorative Wall Materials", it has an important role in the regulation and healthy development of the diatom mud industry. Most of the mainstream companies in the industry have participated in the drafting and formulation of standards. Because the definition and function of diatom mud in the standard are relatively well-described, consumers can understand this product more thoroughly, and the quality supervision department has the basis for supervision. Although the diatom mud standard will inevitably be refined and enriched in the future, it has already taken an important step, “building up the framework.”

The magazine once reminded consumers that when purchasing diatom mud products, all kinds of statements made by the merchants should be confirmed by the corresponding test reports. After the implementation of the standard, consumers only need to see if the product meets industry standards. “As long as the products called diatom mud must follow this standard.” Consumers are more comfortable to buy and understand. It is understood that the presentation and training of the standard will also begin.

â–¡ Related links

What is diatom mud?

Diatomaceous earth is a single-celled aquatic planktonic organism that lived millions of years ago. After the death of diatoms, it was deposited on the bottom of the water. After hundreds of millions of years of accumulation and geological changes, it became diatomaceous earth. Diatomaceous earth is porous and has many pores. The special structure of this mineral determines that diatom mud has strong breathability and adsorption. The diatom mud respirably adsorbs water molecules, and the size and radius of the formaldehyde molecules and water molecules are basically the same, so it can adsorb pollutants in the air, especially formaldehyde.

The surface of diatom mud has active mineral spots, which also react with harmful substances to decompose some harmful substances. However, Qi Zhijiang pointed out that the adsorption of diatom mud is also limited. If the interior is already full, it will stop adsorbing pollutants and can be used together with other active catalytic materials.

Because diatom mud has breathability, it not only absorbs pollutants in the air, but also has a unique effect in regulating indoor humidity, which can maintain indoor humidity balance.

Noise reduction is not an inherent function of diatom mud, which is not reflected in the logo, which is also illustrated. However, the diatom mud itself is rough, and if the thickness reaches 1-2 cm, the noise reduction performance may be more obvious than ordinary wall paint and wallpaper.

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