During the home decoration process, many people choose wooden flooring for its natural beauty and durability. However, what many don’t realize is that some types of wooden flooring can emit harmful gases, particularly formaldehyde, which poses a serious threat to indoor air quality. Formaldehyde is a volatile organic compound (VOC) commonly found in wood-based panels and adhesives used in furniture and construction.
According to formaldehyde detection data, different types of wood products rank differently in terms of their pollution levels. The first in the ranking is **MDF (Medium Density Fiberboard)**. MDF is made from wood fibers, sawdust, and other small wood particles, combined with urea-formaldehyde resin under high pressure and temperature. It's widely used in furniture and interior design due to its smooth surface and ease of painting. However, because of the large amount of adhesive required—typically 200-250 kg per cubic meter—it’s one of the biggest sources of formaldehyde emissions.
Next on the list is **Blockboard**, also known as **large core board**. This material consists of a central core made of small wood strips bonded together with urea-formaldehyde resin, and then covered with thin veneers on both sides. Blockboard is popular for making cabinets, doors, and furniture due to its strength and moisture resistance. But like MDF, it also releases significant amounts of formaldehyde over time.
The third place goes to **Plywood**, which is made by layering thin wood sheets at right angles and bonding them with urea-formaldehyde adhesive. Plywood is commonly used in furniture and structural applications. While it's more stable than MDF or blockboard, it still contains formaldehyde, especially if low-quality adhesives are used.
Following closely is **Multi-layer Finger Joint Board**, which is made by joining small pieces of wood with finger joints and using urea-formaldehyde resin. Since the joints are often exposed, this type of board tends to release more formaldehyde into the air.
Then comes **Veneer**, which is a thin layer of wood applied to surfaces like particleboard or MDF. Veneers are often used for decorative purposes in furniture and cabinetry. Although they don’t emit as much formaldehyde as the previous materials, they can still contribute to indoor pollution when used with lower-quality substrates.
Finally, **Solid Wood Finger Joint Board** ranks sixth. Made from solid wood pieces joined with adhesive, it’s often used in solid wood furniture. Despite being "natural," the use of urea-formaldehyde glue during the finger-jointing process can still lead to formaldehyde emissions, especially if not properly sealed.
In conclusion, while wooden flooring and related products offer aesthetic and functional benefits, it's essential to be aware of the potential health risks associated with formaldehyde emissions. Choosing low-emission materials, ensuring proper ventilation, and using certified eco-friendly products can significantly reduce indoor air pollution.
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