China board trading network news:
The formaldehyde release limit is more stringent
Recently, news came out that the National Standards Commission will soon make amendments to the mandatory national standard GB18580-2001 "Decoration of indoor decoration materials, wood-based panels and their products in the release of formaldehyde," the original standard of E2 standards will be removed.
China's formaldehyde emission limits for wood-based panels and their products are divided into two levels: E2 ≤ 5.0 mg/L, and E1 ≤ 1.5 mg/L. A more stringent E0 rating (≤ 0.5 mg/L) appears as a recommended standard in "Plywood" (GB/T9846.1 ~ 9846.8) and is not mandatory. Compared to an order of magnitude difference between E0 and E1, E2 to E1 differ by 3.5 orders of magnitude. The large difference between levels is a major reason why the industry believes that standards are not scientific.
According to reports, the domestic plate industry companies are currently pursuing "zero-formaldehyde" technology. Formaldehyde emissions are small or negligible. Europe, Japan and other countries are also developing in this area, especially large-brand enterprises pay more attention to health-related environmental indicators. . “The E2 grade plate is actually more suitable for outdoor and packaging applications, and rejection is also within reason,†said Mr. Li, a responsible person for a well-known flooring manufacturer. “Excluding this grade is actually a requirement for formaldehyde emission from the plate. More strict."
Industry improvement soon
The industry believes that if the new revised formaldehyde release limit standard is introduced, it will affect the enterprises that produce floor and floor adhesives. The original adhesives that meet the E2 standard are forbidden to use and increase the production cost of some enterprises. However, the formaldehyde emission limit is increasingly strict, which is the trend of the industry. At present, the performance of the entire floor industry in this area is still good, most companies have already reached the E1 and even E0 production standards. Specifically, when the new national standard is revised and published, no further news has been obtained.
The hazards of formaldehyde mainly come from the wood floor and the substrate of the furniture, and the adhesive is the key to the over-determination of formaldehyde. The urea-formaldehyde rubber with lower price and poor quality will volatilize more formaldehyde, especially the furniture on the plate, and the low-density board is more terrible. Small workshops are hard-hit areas for substandard adhesive applications.
Experts pointed out that the wood materials of home building materials themselves contain formaldehyde. “Zero formaldehyde†is just a concept of sales promotion. In fact, there is no absolute “zero formaldehyde†product. The main culprit causing high formaldehyde content is actually adhesives. The use of low-quality adhesives is low in cost but harmful.
The adhesives commonly used by some domestic furniture and flooring manufacturers are urea-formaldehyde adhesives. To improve the ratio and synthesis technology of urea-formaldehyde rubber is one of the main ways to reduce formaldehyde emission from wood-based panels. At the same time, the development of new non-aldehyde adhesives has also become a key issue for the forestry research sector. Relatively speaking, the rise of non-aldehyde thermoplastic resin adhesives in recent years has certain advantages. The adhesive does not contain formaldehyde, and no free formaldehyde is released during production and use. It is safe and environmentally friendly, and the process is simple and cost-effective. At the same time, the thermoplastic resin as a bonding material can isolate the flow of moisture between the slabs, has better water resistance, and has high stability of the sheet.
"It is precisely because consumers attach more and more importance to the formaldehyde content of furniture, so manufacturers are now committed to the production of low-formaldehyde products." Mr. Li said that this is already the general trend of the industry. "Low formaldehyde is not a technical issue at all, but in the final analysis it is The issue of cost is not willing to buy better adhesives.†He believes that the elimination of the E2 standard will accelerate the process of industry upgrading.
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