Why should indoor formaldehyde be released for three years?

Why does the new house decoration and newly bought furniture have to release formaldehyde for three years? Can't the problem of formaldehyde in materials be technically solved?
The answer is actually yes!

Let me first talk about why it takes three years for decoration materials and furniture to release formaldehyde? This starts with the composition of its materials. Most of the decoration materials and furniture are man-made panels, and man-made panels inevitably use adhesives, and now the most widely used adhesive is urea-formaldehyde resin, and the main components of urea-formaldehyde resin are formaldehyde and urea, so formaldehyde is in The content of man-made boards is very large!

So why use urea-formaldehyde resin? Because urea-formaldehyde resin has the characteristics of translucent, weak acid and weak alkali resistance, good insulation performance and excellent wear resistance, more importantly, it is cheap and has sufficient raw materials! Therefore, it has a large market volume in practical applications!

Because urea-formaldehyde resin is widely used in man-made panels, and a large number of man-made panels are inevitably used in decoration materials and furniture, and formaldehyde is hidden in the material, it needs to be released slowly. According to experiments, the release cycle of formaldehyde As long as 3-15 years. Therefore, the indoor formaldehyde problem will inevitably appear!

Is there no adhesive that can replace urea-formaldehyde resin? In fact, there is, that is MDI glue, which can also be called ecological adhesive!

MDI is a general term for diphenylmethane diisocyanate, a mixture containing a certain proportion of pure MDI and polyphenyl polymethylene polyisocyanate, and a modified product of pure MDI and polymerized MDI. MDI glue, namely MDI ecological adhesive, refers to a kind of downstream products of MDI, which can be used to manufacture various boards. One of the main features of man-made panels produced with this adhesive is that they do not contain formaldehyde! However, the production technology of this product is not yet fully mature, and the production cost is much higher than that of urea-formaldehyde resin!

Therefore, probably due to cost considerations, there are not many adhesive applications for artificial boards at present. Therefore, in the interior decoration and furniture, unless pure solid wood decoration materials and furniture are used, it is difficult to avoid the problem of indoor formaldehyde. And the price cost of pure solid wood furniture is often prohibitive!

HD-F801-3 formaldehyde climate chamber
Product manufacturing standard: GB18580-2017 "Limited formaldehyde emission in wood-based panels and their products for interior decoration and decoration materials"
GB18584-2001 "Limits of Hazardous Substances in Wooden Furniture"
GB18587—2001 "Limits of Hazardous Substances Released from Interior Decoration Materials Carpets, Carpet Liners and Carpet Adhesives"
GB17657—2013 "Experimental methods for physical and chemical properties of wood-based panels and veneer wood-based panels"
EN 717-1 "Environmental Chamber Method for Measurement of Formaldehyde Emission from Wood-based Panels"
ASTM D6007-02 "Standard Test Method for Determination of Formaldehyde Concentration in Wood Products Released Gas in Small-scale Environmental Chamber" LY/T1612-2004 "1m Climate Chamber Device for Formaldehyde Emission Detection"