At present, some of the wood-based panel products circulating in the market contain formaldehyde, and even high-concentration formaldehyde is no longer an industry secret.
Why do high-grade formaldehyde in wood-based panel products? Why do producers bring such problem products to market smoothly? Why do regulators sit idly by? Professor Wang Zheng, deputy director of the Institute of Wood Industry of the Chinese Academy of Forestry, gave the answer behind this series of questions.
Wang Zheng believes that many wood-based panel products contain high concentrations of formaldehyde, which is closely related to China's current national standard "indoor decoration materials, wood-based release limits in wood-based panels and their products."
"Objectively speaking, the formulation and implementation of the national standard GB18580-2001 in the past played a positive role in promoting the development of China's wood-based panel industry. As a result, China has become a major producer and consumer of wood-based panels in the world. The improvement of environmental requirements, this standard has been seriously lagging behind, and needs further revision and improvement." Wang Zheng said.
It is understood that the standard stipulates that the formaldehyde limited release value of China's wood-based panels is divided into two levels, namely E1 and E2, E2 5.0/L, and E1 1.5/L.
"This standard specifies the concentration of formaldehyde released from wood-based panels, but does not specify the total amount of formaldehyde in the room, that is, only the control of unit release, but does not use the control of the total amount of wood-based panels. When the amount of wood-based panels reaches a certain level The amount of formaldehyde released will exceed the standard." Wang Zheng said.
While Wang is interpreting the GB18580-2001 standard, he also expressed his opinion: "Objectively speaking, the current national standard has become a protective umbrella for formaldehyde legality. This has led to the loss of many consumers and manufacturers. The enterprise is profitable. As long as it meets the national standard, you can't say that it exceeds the standard. As for the excessive formaldehyde caused by the total amount of use, the enterprise is not illegal. From another perspective, the fault is not in the enterprise, but in the formulation of national standards. The problem."
Not only that, but the limitations of GB18580-2001 national standards still have other drawbacks.
For example, in order to meet the so-called standard requirements, some manufacturers of wood-based panel products adopt a method of sealing and sealing wax to seal the appearance of the product. This method has a greater impact on the human body. On the surface, formaldehyde is locked inside, and when the temperature rises, those formaldehydes are released. Without a closed method, the formaldehyde concentration will actually decrease gradually in a well ventilated condition.
Wang Zheng said that the core technology of formaldehyde emission in wood-based panel products lies in adhesives. If you use environmentally friendly adhesives, you can reach European, American, and Japanese standards, but the cost will increase. At present, the technology of environmentally friendly adhesives is relatively mature. If environmentally friendly adhesives can be used in large quantities, the cost will be reasonably reduced.
At present, China is the world's largest producer and consumer of wood-based panels. China exports a large number of panels that meet international environmental standards every year. In China, limited to the low-cost competitive industrial environment, 80% of domestically produced wood-based panel products are produced using unnatural urea-formaldehyde glue. As a result, the status quo has become environmentally friendly products for export to foreign countries. Most of the people use the products that are not environmentally friendly.
Wang Zheng revealed that in fact, the first revised draft of GB18580-2001 was reported to the National Standardization Management Committee two years ago, but it has not yet been released. The reason is that there is a lot of controversy about the new standard. Although the new standard may cancel the E2 level, there are still no corresponding usage quotas and restrictions for different environmental protection products. At the same time, it is not excluded that interest groups are reluctant to see environmental standards improve because they will â€œharmâ€ their inherent interests.
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