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Formaldehyde Emission New Standard For The Promotion Of Plywood Industry
Jul 03, 2017

Formaldehyde emission new standard for the promotion of Plywood industry

Plywood is by the logs by wood square plane rotary cut veneer or cut it into two sub-companies named seaport, reoccupy adhesive agglutination of three layer or layers of plate material, usually with an odd number of veneer, veneer and the adjacent layer fiber direction perpendicular agglutination. Plywood eucalyptus wood as the main raw material to produce the Plywood because of its rationality and structure of production in the process of fine processing, can overcome the defects of wood substantially improve greatly and improve the physical and mechanical properties of wood, eucalyptus Plywood production is fully rational use of eucalyptus wood, an important method to improve the performance of wood.

With the improvement of living standards, people pay more and more attention to the health problems in daily life. And not only the industry is paying attention, the country is also in step by step adjustment policy. A news a few days ago, the national standard committee is the mandatory national standard GB18580-2001 "interior decoration decorates material, man-made board and its products in formaldehyde to release a set limit to" make revisions, the original standard of E2 standard will be removed.

There is no reason why the E2 standard is excluded. The protection level of Plywood is divided into E0, E1, and E2. There are two levels of formaldehyde release in China for man-made boards and their products: E2 is less than or equal to 5.0 mg/L, E1 is less than or equal to 1.5mg/L. The more stringent E0 level (less than 0.5 mg/L) appears as the recommended standard in the Plywood (GB/T9846.1 ~ 9846.8), which is not mandatory. The difference between E0 and E1 is an order of magnitude. E2 to E1 is an order of magnitude of 3.5. The magnitude of the difference between grades is one of the reasons that the industry considers the standard unscientific.

According to introducing, domestic Plywood industry enterprises, the current in the pursuit of "zero - formaldehyde" technology, formaldehyde release a quantity is small or negligible, Europe, Japan and so on also in this respect development, especially the big brand enterprises pay more attention to environmental protection index of the about health. "E2 grade Plywood is more suitable for outdoor and packaging applications, excluding also within reason," one prominent floor manufacturers responsible person Mr Li said, "will this level, is actually more strict with formaldehyde emission of Plywood."

The industry believes that if the new revision of the evaluation standard, formaldehyde to release a affect production floor and floor glue, originally meet E2 standard of adhesive bans the use, increase the part of the enterprise production cost. But formaldehyde to release more and more strict limit, is the trend of The Times, the industry development is that the industry as a whole floor performance is good, most of the enterprise production standards already reached E1, E0 grade even. There is no further information on when the new national standard will be revised.

Formaldehyde hazards mainly comes from the base material of wooden floor and furniture, and adhesive is the key to formaldehyde to release a overweight or not, the price is low, poor quality of urea formaldehyde glue, can evaporate more formaldehyde, Plywood furniture especially, low density board is more terrible, small workshops is unqualified adhesive application areas.

Experts point out, the woodiness material of household building materials itself contains formaldehyde, "zero formaldehyde" is the concept that sells propaganda, actually have no absolute "zero formaldehyde" product. However, the main culprit of high formaldehyde content is the adhesive, which is low cost but harmful.

Domestic some furniture, floor manufacturer commonly used glue adhesive is urea formaldehyde glue. Improving the ratio and synthesis of urea-formaldehyde glue is one of the main ways to reduce the formaldehyde emission. At the same time, the development of a new type of non-aldehydes adhesive has become a key issue in the forestry research department. Relatively speaking, the recent rise of non-aldehyde thermoplastic resin adhesive has some advantages. This kind of adhesive does not contain formaldehyde component, in the process of production and use free formaldehyde release, safe and environmental protection, the technology is simple, cost-effective. At the same time, thermoplastic resin as adhesive material can isolate the moisture flow between the slab, good water resistance and high stability of Plywood.

"Because consumers to furniture formaldehyde content is more and more attention, so now the vendors are committed to the production of low formaldehyde products", Mr Li said that this is the trend of the industry, "low formaldehyde is not technical problem, a lot of time in the final analysis is the cost, give up is not willing to buy better adhesive", he thinks, E2 level standard, will encourage industry to speed up the ascension process.

However, as a consumer trust of wood-based Plywood mall, the strict quality control of the products sold is the main means of controlling formaldehyde household. It is not a product of the E2 level. For your health home, woodland will do better.