When we choose boards on the market, we will find that there are many boards with English names. We don’t know these English names and what kind of materials they are, so we don’t dare to choose with confidence. If there is hesitation, then , we have to look at what material the mdf board is. Only after knowing this can we know whether this material can be used for decoration. Besides, does the mdf board contain formaldehyde?
What material is mdf
The mdf material is actually a common medium density fiberboard. Medium density fiberboard (English name: Medium Density Fiberboard, abbreviated as MDF, referred to as MDF). Its manufacturing raw materials are mainly plant fibers, and urea-formaldehyde resin or some other types of synthetic resins are applied, and then processed under pressure and heating, and the boards with a density between 0.50 and 0.88g/cm3 can be made.
There are three main categories of MDF materials
One is the medium-density fiberboard used indoors, whose symbol is MDF, which cannot be soaked in water for a short time or withstand high humidity.
The second is the moisture-proof medium density fiberboard used indoors. The symbol mark is MDF.H, which can withstand cold water immersion or high humidity environment. It is generally suitable for kitchens and bathrooms at home.
The third is the outdoor type panel, the symbol mark is MDF.E, which can withstand the diverse conditions of the climate, and can withstand the effects of aging, water immersion, steam humidity and heat, etc.
Features of MDF material (medium density fiberboard)
- The closest to natural wood among all kinds of man-made boards. The structure is uniform, the density is moderate, the board surface is smooth and delicate, and it is easy to carry out various finishing treatments.
- The dimensional stability is good, the core layer is uniform, the surface and edge of the board have good machining and forming performance, and the thickness and size specifications vary widely, which can meet the needs of various manufacturing processes. Therefore, MDF is widely used in furniture. And door products manufacturing and indoor and outdoor decoration industry.
- Medium-density fiberboard is a homogeneous porous material with good acoustic performance. It can enhance the sound-absorbing performance of wooden doors when used in the production of wooden doors.
Advantages of MDF material (medium density fiberboard)
Mdf material has a uniform internal structure, is also extremely moderate in density, and has excellent dimensional stability and is not easily deformed.
It has high internal bonding strength and elastic modulus, and the surface is extremely smooth and flat, which can fully meet the needs of secondary processing. It has a wide range of uses and can be used for rotary cutting veneer, sliced veneer, making paint paper and Impregnated paper can also be directly painted or printed and decorated.
Mdf material also has excellent processing performance, and it can be processed by drilling, tenoning, milling, sanding, etc., and its performance is better than many building materials. In the process of production, some waterproofing agents, fireproofing agents, preservatives, etc. can also be added to optimize its performance.
MDF board technical parameters
MDF board size specification: 2440mm*1220mm, thickness 3mm, 5mm, 9mm, 12mm, 15mm, 18mm, 25mm, etc.
Density: 450-750kg/m3
Moisture content: 4-13%
Static bending strength: 20mpa
Surface bonding strength: 0.5mpa
Internal bonding strength: ≥1.2mpa
Screw holding force: 1540N
Environmental protection level: E1, E0, P2 level
How to choose and buy MDF fiberboard
- Look at the formaldehyde content
Fiberboard will use glue in the production process, and the glue contains formaldehyde. Therefore, when purchasing fiberboard, the amount of formaldehyde released is a very important test item. However, for regular manufacturers, the formaldehyde content of fiberboard can meet the national standard.
- Look at the cleanliness
The cleanliness of the product is very important when purchasing fiberboard. Generally speaking, the fiberboard with better cleanliness should have no obvious particles on the surface, and it feels smooth when touched by hand. If it is astringent, it means that there are impurities in the product. , the quality is not up to standard.
- Look at the overall elasticity
A notable feature of fiberboard is good toughness and strong bendability, so fiberboards that are too hard are generally inferior products.
- Look at the appearance
The fibers of high-quality fiberboard are uniform and delicate, and the surface of the fiberboard has no local depressions or bulges. If there is, the quality is low.
Does MDF board have formaldehyde?
MDF board contains formaldehyde. Formaldehyde mainly exists in the industrial glue of artificial boards. MDF board is a kind of density board, including long fiberboard and short fiberboard. It is a kind of man-made board made of wood fiber or other plant fiber as raw material, after crushing, fiber separation, drying, applying urea-formaldehyde resin or other suitable adhesives, and then hot pressing.
Precautions:
- From the appearance, check whether the thickness and density are uniform, whether the corners are damaged, whether there are layers, bulges, carbonization, etc., and whether there are soft parts.
- When conditions permit, you can saw a small piece of medium density fiberboard and soak it in water with a water temperature of 20°C for 24 hours to observe its thickness change, and at the same time observe whether there are small bulges on the surface of the board. The thickness changes greatly, and there are small bulges on the surface of the board, indicating that the water resistance of the board surface is poor.
- Choose medium-density fiberboard with low emission, and smell it with your sense of smell when choosing. You should choose medium-density fiberboard with less irritating smell, because the greater the smell, the higher the formaldehyde emission and the greater the pollution.
The above article has told everyone what material mdf board is. It is a kind of wooden decoration material. This material will be used in decoration. The Chinese name is medium density fiberboard. It is crushed and pressed after soaking in water. Generally, it is used when making furniture. It has great plasticity. At the same time, I also told you whether there is formaldehyde in mdf board.
