When you hear the word "formaldehyde," many people are basically "talking about aldehydes." Hence, many furniture manufacturers to cater to the needs of the public to claim that their furniture is "zero formaldehyde". `, of course, because of the wood itself contains trace amounts of formaldehyde, coupled with the wood will be used in the process of machining materials such as rubber adhesion agent, furniture to truly achieve zero - formaldehyde, basically just a legend.
So, someone asked, besides the trace formaldehyde that comes from lumber, other formaldehyde can hide in furniture where?
Solid wood paint furniture formaldehyde pollution source
Real wood paint furniture frame is solid wood, the cabinet door plank is also real wood in most cases, but the side board, the partition board, the back board of the backboard is to point to the board, joiner board, plywood and so on board. Therefore, the formaldehyde source of the paint furniture comes from two parts: first, there is no wood-spray panel; Second furniture has less internal spray paint, the paint film is incomplete, can not completely seal the free formaldehyde release in the man-made board, it is also a long-term pollution source.
The formaldehyde pollution source of European furniture
European style furniture modelling is luxuriant, colour and lustre is dominated by light color. High-grade European furniture is made of solid wood carving, common European furniture is pressed by the density board, after lacquer or baking lacquer is made. Therefore, European furniture is based on density board, the surface is sprayed with oil and gas furniture, the most common is white, milky white and other light colors.
The long-term formaldehyde emission source in European furniture comes from the urea formaldehyde resin in the substrate density plate. Film complete, therefore, will be completely closed free-formaldehyde in density board furniture surface, does not produce formaldehyde pollution for a long time, only small amounts of paint in the short term (generally) within 6 months of formaldehyde release.
Of Europe type furniture formaldehyde emission source mainly in the furniture inside for a long time, especially on the back plate, the back after the lateral (wall), drawer box and so on to the places where we usually don't pay attention to, these places no spray paint, or spraying quantity is little, therefore, cannot be closed free formaldehyde volatilization of density board.
The formaldehyde pollution source of plate furniture
The formaldehyde pollution source of plate type furniture has several cases:
First, do not take the element board that adorn the skin, it is common see the outside of drawer bottom board, furniture hind board outside, bottom board and so on; The second unsealing side, common in the partition of household; The quality of the third skin is unqualified, or the sealing side is unqualified. These three situations can cause the free formaldehyde in the substrate to evaporate into the air and form pollution.
In addition, some of the work is rough, or melamine is decorated with the skin to use inferior materials, can not completely close off the particle board free formaldehyde release, thus form the long-term formaldehyde pollution source.
Thinner of board type furniture accessories, such as drawer after floor, backplane, box bottom bed, cabinet type back and so on, these thinner match the veneer board in leather material is often not melamine face plate, are some of the material, relatively poor sealing performance cannot completely closed the free formaldehyde in density board, forming a long-term pollution.
But the quality of these match the tin plate material, it is hard to identify with the naked eye, so have to rely on the detection, placed test kits in the furniture inside, if the formaldehyde concentration is greater than 0.6 mg, explain the facing material may have a problem, it is a long-term formaldehyde pollution sources (testing condition is: indoor temperature more than 33 ℃.)
What needs to be noted is that plank furniture is often neglected formaldehyde release source -- the wooden line in bed. Use iron frame to fix wooden bar, upward slightly curved, it is multi-layer plywood, for long-term formaldehyde pollution releases source, this is the furniture that is closest to the body, must not ignore.
Besides solid wood paint furniture, European style furniture and plank furniture, the furniture that decorates makes and soft pack furniture also should pay attention more.
The formaldehyde pollution source that decorates furniture
The furniture of the decoration is divided into two categories: one is to use the finger plate (the dental plate), the joiner board (the large core board), the plywood (multi-layer board, the solid wood multi-layer board) to make; One type is made with a thin woodworking board or plywood (commonly known as a "painless board" or "eco-plate") with a veneer of veneer.
Use thin wood board, plywood, finger plate and so on furniture
The interior of the furniture without any treatment is the largest source of long-term formaldehyde pollution. Furniture surface using the processed decoration panel, or spray paint, furniture interior does not make any processing, and for the joiner board, the exposed surface of the plate, such as plywood formaldehyde volatile without any resistance, is one of the biggest long-term a pollution source.
Some furniture inside is decorated with PvC adornment paper, but because PvC sealing effect is not good, the swim of formaldehyde in man-made board still can volatilize. The inside of the PvC veneer material is to be tested to determine whether it is a source of pollution. Indoor air temperature above 23 ℃, test results in the furniture is more than 0.4 to 0.6 mg, and there is no doubt is formaldehyde pollution for a long time.
Warm tip: the finger plate is often mistaken for the solid wood that does not have formaldehyde pollution, it is actually formaldehyde pollution relatively few man-made board. The pressure plate is less than the thin board, and the formaldehyde release is nearly half of the joiner plate.
Furniture made of lacquered panels
The furniture that is made of lacquer board is similar to PVC face furniture, need to pass detection to verify whether it is formaldehyde dye source.
Also avoid lacquer board has "single facing" (only stick a face, the other side not stick, plywood or carpentry board directly exposed) and "double face", if it is a single veneer, best when decorate with strong aldehyde agent did not act the role of addition to the side.
Formaldehyde pollution source in soft bag furniture
The frame of soft package furniture is solid wood, in addition to frame, a lot of place will have lining board, the lining board general case is man-made board, with multilayer plywood, thin woodwork board, density board is given priority to. The liner is generally not treated as a decorative surface, so it is exposed as a plain plate, which is the source of long-term formaldehyde pollution. The man-made board liner is usually concentrated in the armrest, back to back and so on, the percussion listening can be distinguished.
In addition, some have store content function sofa, man-made board usage is even greater, as in the figure above under the cushion, armrest is made of joinery board, plywood, locker, is a long-term source of formaldehyde pollution.