Sealed boards (such as density boards) do contain formaldehyde. The main reason is that formaldehyde-containing adhesives, such as urea-formaldehyde resin, are used in their production process. The following is a specific analysis:
Source of formaldehyde
Density boards are made of wood fiber materials and glue by heating and pressurizing, and the glue usually contains formaldehyde. The greater the amount of glue used, the higher the formaldehyde content.
Formaldehyde release cycle
The formaldehyde release cycle of density boards is longer, and it usually takes more than 3 years to completely volatilize. This is because formaldehyde exists inside the board and releases slowly.
Formaldehyde content level
According to national standards, density boards are divided into E0, E1 and E2 grades according to formaldehyde content:
E0 grade: formaldehyde release ≤0.5mg/L
E1 grade: formaldehyde release ≤1.5mg/L
E2 grade: formaldehyde release ≤5mg/L.
How to reduce the harm of formaldehyde
Ventilation: Open the window for ventilation for 2-3 months after installation to accelerate the volatilization of formaldehyde.
Activated carbon adsorption: Suitable for confined spaces such as wardrobes, drawers, etc.
Professional treatment: You can ask a professional company to handle it and quickly remove formaldehyde.
Summary: Sealed boards contain formaldehyde, but its harm can be reduced by choosing products with low formaldehyde levels and taking effective formaldehyde removal measures.
