Over the past year, many people have detected excessive formaldehyde in wood-based panels and composite flooring.

With the improvement of living standards, people pay more and more attention to environmental protection, if the room decoration is inferior Wood-based panels and their products will release a certain amount of formaldehyde, and the air quality in the room will deteriorate, thus endangering human health. Recently, the Guangdong Provincial Administration for Industry and Commerce released the results of the 2017 annual inspection of the quality of wood-based panel products, and found that the formaldehyde products of the nine wood-based panels were unqualified.

Reporters sorted out the quality inspection of wood-based panel products by market regulators in various provinces and cities in recent years. According to the inspection, one of the main factors for the failure of wood-based panels and their products is that the amount of formaldehyde released exceeds the standard. Concealed behind the mass production and consumption of inferior wood-based panels and their products is the concern of environmental safety.


Multiple detection of unqualified wood-based panels

On October 13 this year, the Guangdong Provincial Administration for Industry and Commerce announced the quality inspection results of the wood-based panel products in the circulation field. On the board side, 9 samples of formaldehyde were found to be exceeding the standard, of which 3 were fine wood floors and 6 were decorative veneer veneered panels.

On October 16, the man-made board products announced in the Jilin Provincial Administration for Industry and Commerce In the spot check test results, it was also found that the emission of formaldehyde in the two eco-boards was unqualified, and the samples were purchased from Changyuan Comprehensive Building of Hongqi Street, Ouhai Street, Dunhua City and Meisong Decoration Material Supermarket of Changbai Mountain.

Not long ago, the Liuzhou Municipal Bureau of Quality and Technical Supervision of Guangxi Autonomous Region The board product quality supervision and spot check also found that there are 11 batches of blockboard which have unqualified water content, formaldehyde emission and transverse static bending strength. The unqualified formaldehyde emission is mainly because the detection value does not meet the nominal value of formaldehyde. In other words, in order to cater to consumers’ pursuit of health and environmental protection, some enterprises arbitrarily label the formaldehyde level and shoddy it. Reasons for failure: First, the use of adhesives with a high content of free formaldehyde, and the use of an unreasonable sizing process and hot pressing process, while not adopting an appropriate post-treatment process.

The results of the 2016 annual quality inspection of the wood-based panel notified by the Guangdong Provincial Administration of Industry and Commerce Of the 167 wood-based panels, 52 were unqualified. A variety of solid wood composite flooring, blockboard, decorative veneer veneer panels have been detected excessive formaldehyde. Among them, the formaldehyde emission of one solid wood composite floor and three blockboards was unqualified. The formaldehyde emission of the 乖乖虎 brand blockboard produced by the nominal Linyi Oriental Ecological Wood Co., Ltd. exceeds the standard value by more than 17 times. In addition, there are two decorative veneer veneer panels that have failed to release formaldehyde.

As early as March of this year, Ningxia Hui Autonomous Region Industrial and Commercial Bureau had 80 batches of The man-made board products were sampled. In the unqualified 25 batches of artificial boards, except for the water content, the immersion peel strength and the static bending strength, all the other formaldehyde emission levels exceeded the standard. The unqualified sample manufacturers include Guangzhou Weizheng Wood Products Co., Ltd., Hebei Xinda Wood Co., Ltd. and Hebei Hengfeng Wood Co., Ltd.

Inferior adhesives cause formaldehyde to exceed

For the hazard of formaldehyde, most people already know. Formaldehyde is a colorless, highly irritating gas. Excessive formaldehyde emission will stimulate the respiratory tract, cause chronic respiratory diseases, reduce the physical condition of the newborn, and be toxic to the nervous system, reproductive system, and immune system. At the same time, formaldehyde is also a carcinogen, easy to induce leukemia.

The formaldehyde hazard is so great, and the quality of the wood-based panels is frequently checked for formaldehyde. What is the reason for the problem of exceeding the standard?

Yang Hongjun, engineer of the Building Materials Laboratory of Shenzhen Institute of Metrology and Quality Inspection, said in an interview with the reporter of China Consumer News that wood-based panels and their products are widely used and widely used to produce wood-based panels. Most of the adhesives used are urea-formaldehyde resin adhesives with formaldehyde as the main raw material. The adhesives have the advantages of low production cost, sufficient raw material source, simple production process and convenient use, and are the main components of artificial board adhesives. Varieties, but products made with urea-formaldehyde resin adhesives continuously release formaldehyde.

For consumers, most wood-based panels are not directly directed to consumers. Sales, but as raw materials for building materials, wood-based panels have flowed into the consumption of personal homes through manufacturers and decoration companies. Most manufacturers of cabinets, wooden doors and windows, wooden furniture, etc. do not produce sheets, but reprocess them by purchasing materials from upstream sheet production companies. Therefore, the environmental performance of the products of the upstream wood-based panel industry directly affects the safety and health of the consumer’s home environment.

According to industry insiders, the current wood-based panel market is unbalanced due to supply and demand, cost The rapid rise and other reasons lead to serious competition at low prices. In the market, the quality of wood-based panel products is shoddy. It is common for enterprises to sell formaldehyde over-standard products with the “zero formaldehyde” scorpion. The use of plates with unqualified key indicators such as formaldehyde to produce wood flooring, wooden doors, furniture, cabinets and other products will endanger the safety of consumers. In the mandatory national standard GB18580-2001 “modern decoration materials, wood-based panels and their products in the formaldehyde release limit”, although the release concentration is specified, but the total amount of formaldehyde emission control is not specified, when the amount of artificial board reaches a certain level The amount of formaldehyde released will still exceed the standard.

New national standard formaldehyde limits are in line with international

Reporter learned that the mandatory national standard GB18580-2001 “interior decoration materials wood-based panels The formaldehyde emission limit in its products is the only mandatory national standard in the wood-based panel and its products industry. This standard means the “bottom line” of state regulation and the “red line” of industry production. That is to say, the state requires that the formaldehyde emission of wood-based panels and their products must meet the requirements of this product, which is also the basis for testing whether the formaldehyde emission of the products is qualified. For more than a decade, this standard has played an important role in regulating the development of the industry, improving the environmental performance of products, and protecting the health of consumers.

However, due to the development of the industry and the improvement of people’s living standards, the old standard is more The more it comes to meet the people’s production and living requirements. Compared with other countries, countries around the world, especially developed countries, attach great importance to the release of formaldehyde from wood-based panels and their products. The International Organization for Standardization (ISO), the European Union, the United States and Japan have continuously updated the formaldehyde emission limit standards for wood-based panels and their products. Higher requirements are placed on formaldehyde release limits. At present, the standard has been revised for the first time. One of the important amendments is to increase the formaldehyde emission limit value, cancel the original standard E2 level, and change the limit mark E1. The new standard will be officially implemented on May 1, 2018. The most obvious change of the revised new standard GB18580-2017 is to increase the formaldehyde emission limit requirement. The uniform formaldehyde emission limit value is 0.124mg/m3, the limit mark is E1, the original E2 level is cancelled, and it is in line with international standards.

The head of the Consumer Protection Department of the Guangdong Provincial Administration for Industry and Commerce said that at present, the relevant standards are During the formulation, the supervision of man-made boards by the industrial and commercial departments is also increasing. Under the fierce market competition, the wood-based panel industry will also have a market reshuffle, small enterprises will accelerate its demise, industrial concentration will become higher and higher, and industry transformation and upgrading will accelerate. In an environment where relevant standards are gradually improved and supervision is becoming more and more important, relevant enterprises must also increase their product quality and service construction to cope with market tests.

The head of the Consumer Protection Department of the Guangdong Provincial Administration for Industry and Commerce reminded that for consumers In the current market environment, we must learn to distinguish the quality of the products when purchasing wood-based panels and related products. Wood-based panels are substrates for laminate flooring, wooden doors, cabinets, panel furniture, veneers, etc. The quality of wood-based panels is determined by formaldehyde release, static bending strength, and impregnation. When purchasing products such as panel furniture, it is necessary to ask whether the formaldehyde emission of the board meets the requirements of the national standard and obtain the certificate from the merchant. In addition, when purchasing household products based on wood-based panels, be careful not to place too much furniture in the same space to avoid indoor air pollution.

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