Composite wood flooring formaldehyde content, how long did not formaldehyde?
Composite floor structure is mainly divided into: wear-resistant layer, decorative layer, substrate, balance layer; the four layers are glued together by hot pressing; the wear-resisting layer, decorative layer and balance layer are impregnated paper, and the glue contains formaldehyde;Wherein, the base material is a high-density fiberboard, and formaldehyde containing glue is used during the production process;Therefore, laminate flooring must contain formaldehyde.In the strengthening of the national standard flooring, formaldehyde emissions to measure whether the floor is environmentally friendly; formaldehyde emissions by how much, sub E1, E0 two grades, to E1 environmental protection standards, indicating that the floor environment, you can rest assured that the use of.
The key to the floor substrate used, composite floor structure is divided into 4 layers: 1. surface wear-resisting layer three, two aluminum oxide, 2. grain layer, namely the floor surface pattern veneer paper 25g, 35g, 46g, etc., the paper grams of higher wear resistance; 3. base layer and the base material and not environmental protection floor very large, the use of inferior glue and environment-friendly glue determines the floor formaldehyde release, the release of low formaldehyde glue and short time, and the release of formaldehyde exceed the standard inferior glue and release a long time, some even several decades are harmful; 4. balance layer, also called moisture proof layer, mainly composed of melamine and it can reduce the decomposition of formaldehyde, formaldehyde release. Good domestic flooring substrate used in large substrate as the main representative.
As long as you keep using it, you'll never be able to release it completely.Formaldehyde in composite floor are artificial substrate board, which is the glue material containing formaldehyde after high temperature hot pressing will be fused together, if formaldehyde release finished, the floor also is basically a fee (the glue for bonding substrates, lost). Decoration, formaldehyde is essentially impossible to eradicate, only as much as possible to reduce the release rate and release of formaldehyde.
Different floor formaldehyde content is different, when buying the best look at the identification of the book, at present our country standard of at least E1, of course, can buy E0 better, E1 free formaldehyde content is less than 9mg/100g, the E0 level of formaldehyde content is less than 3mg/100g (another calculation standard: E1 = 1.5mg/L, E0 = 0.5mg/L), as recently out of class F4, E0 (F3) level is better.
