In the daily decoration process, many people pay more attention to the effect of home improvement. The chief engineer of a decoration company said that they always explain to customers that the MDF has a high formaldehyde content, but some customers always don't believe it. Other customers think his explanation is alarmist. So which plates should I choose for home improvement? What are the criteria for environmental classification of various boards?

Type of plate and formaldehyde content

One of the city's decoration companies, Mr. Pan said that the plates used by the general brand decoration company in the home decoration are all low-cost plywood to ensure that the home after renovation meets indoor environmental requirements. The content of formaldehyde in plates made of different raw materials and glues varies greatly.

For example, a common MDF, also known as a fiberboard or a particleboard, is a wood-based panel in which wood, bamboo, straw, bagasse, and the like are bonded together by high temperature and high pressure using a glue containing formaldehyde. The veneer after the veneer is also called melamine board, solid wood particle board, granular solid wood board, and has various names, and the appearance looks more beautiful. The amount of formaldehyde glue contained in each cubic meter of MDF is generally 200-250 kg, which is the highest formaldehyde content of all plates. Because of its good edge sealing, formaldehyde is difficult to disperse and the discharge process is very long. If the glue of MDF is glued with melamine, it is also environmentally friendly, but the price of this glue is more than 10 times that of formaldehyde glue. At present, no domestic manufacturer will use such expensive glue for the production of MDF.

Multi-layer fir finger joint board, other multi-layer solid wood finger joint board using formaldehyde glue. The fir is softwood and cannot be deep degreased and steamed. The formaldehyde-free glue cannot be used on the fir fingerboard. Generally, the multi-layered fir finger joint plate is three layers, and two layers of the three layers must be coated with a large amount of formaldehyde glue. However, since the "finger joints" of the finger joints of the fir are exposed to the air, formaldehyde is more volatile than the "blockboard". Relative to blockboard, the formaldehyde content is higher, it is more volatile, and the natural environmental protection is worse than the blockboard.

Blockboard, also known as a large core board, is a wood-based panel in which small pieces of wood are spliced ​​together in a form of glue, and then two layers of veneer are attached to the top and bottom. The large core board is easily deformed and must be stacked in multiple layers. The formaldehyde content is low and environmentally friendly.

The splint is a widely used plate, which has various specifications such as 3, 5, 9, and 12 centimeters. It is cross-stacked with pine boards, and has a pulling force between each other, which is not easily deformed. Low formaldehyde content and relatively environmentally friendly.

Solid wood finger joint board: It is also a finger joint board using solid wood board as raw material, but it uses less glue in the production process. It is an ideal wood board, which is a solid wood door material with a solid wood dosage of 95~98%. But the price is expensive.

In home decoration, the health of the family is more important than anything else. Never buy those products with high formaldehyde content.

How to choose environmentally friendly plates

So how do you choose environmentally friendly plates? At present, the formaldehyde limit level is divided into three levels of e2, e1, and e0, that is, e2≤5.0mg/l, e1≤1.5mg/l, and e0≤0.5mg/l. In the national standards, the quality standard for formaldehyde content is gb18584-2001 "interior decoration materials, limit of harmful substances in wood furniture". The standard stipulates that the amount of formaldehyde released should be ≤1.5mg/l. The e1 environmental standard is a national mandatory health standard, and it is a mandatory “safety standard line”. Therefore, it is very necessary to maintain the ventilation of the renovated house. In the case of normal decoration, the release period of indoor formaldehyde will last for 3 to 15 years.

There are many reasons for the decoration pollution, including unqualified building materials, improper decoration methods, etc. Among them, unqualified building materials are the most harmful to the human body, and paint furniture, paints, synthetic fiberboards, etc. are the main indoor pollutants. According to Mr. Pan, the formaldehyde release cycle in artificial boards takes at least 3 to 15 years. Ventilation of the window, placement of activated carbon and green plants can only eliminate or absorb the pollution in the air, and the problem of lurking at the source is not solved.

Not long ago, the Provincial Administration for Industry and Commerce notified the quality inspection of the quality of wood-based panels in the circulation field in 2015-2016. According to the results of the inspection, 52 of the 167 samples failed, and the rate of unqualified discovery was 31.1%. The main quality problem is that the amount of formaldehyde released and the burning performance are unqualified.

Therefore, General Manager Pan said that when purchasing plates, first of all, it depends on the environmental protection of the wood-based panels, that is, whether the formaldehyde content of the products meets the requirements of national standards. At present, the standard of formaldehyde emission of wood-based panels that consumers often contact on the market is e1 grade and e0 grade. The e1 level environmental protection standards are basically no threat to the human body.

Secondly, when purchasing, pay attention to the product identification information. At the same time, wood-based panels are production license management products, and consumers need to check whether they have obtained a production license when purchasing products.

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