One、Formaldehyde emission standards for plywood
According to the "Ten Mandatory National Standards for Limiting Harmful Substances in Interior Decoration and Construction Materials," particleboard (plywood) and related board products must have formaldehyde emissions of ≤1.5 mg/L to meet environmental standards. Particleboard that meets this standard is classified as E1-grade. The new national recommended standard specifies that the formaldehyde emissions for particleboard have increased to the E0-grade standard – formaldehyde emissions of ≤0.5 mg/L. This allows for control of formaldehyde emissions in wood products to reduce pollution in living spaces and protect consumer health.
Two. Does particleboard have high levels of formaldehyde?
"Plywood meeting national E1 grade standards has relatively low formaldehyde content. However, some plywood manufacturers produce plywood that does not meet the standards, with formaldehyde levels exceeding national regulations. Plywood typically consists of a thick layer made of synthetic material composed of wood chips and urea-formaldehyde adhesive. As urea-formaldehyde adhesive gradually decomposes and releases formaldehyde, the initial indoor air quality in newly renovated rooms can be significantly affected. Therefore, we recommend that if you choose to use plywood, you should select products from reputable manufacturers that meet the required standards."
III. How to Avoid Formaldehyde Pollution from Plywood
1. Accurately determine the usage amount. For residential spaces of approximately 100 square meters, the use of plywood should not exceed 20 sheets. In particular, avoid using plywood as a subfloor beneath the flooring, as this can lead to a significant increase in formaldehyde levels in the indoor air.
2. Apply a finish to the plywood according to the requirements of the Chinese national standard "Limits of Harmful Substances in Indoor Decorative and Decorative Materials for Wood-based Panels and Products," which stipulates that plywood with a formaldehyde emission level of less than and equal to 5 micrograms per liter must be finished before use indoors.
3. For particleboard that cannot be finished, perform cleaning and sealing treatment, especially for various furniture back panels, cabinet interiors, and radiators made with particleboard. Currently, there are some products available on the market that eliminate and seal formaldehyde. Using these products in conjunction with the finishing process is the most effective approach.
4. After renovation, conduct thorough inspection before moving in. If formaldehyde pollution is detected, it is essential to implement remediation measures.