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Lecture Hall on Formaldehyde and Environmental Standards

by:Jinlon Furniture     2022-01-13
Definition of formaldehyde Formaldehyde (HCHO), also known as formic aldehyde, is a colorless gas with a pungent and pungent odor. The gas has a density of 1.067 kg/m3 and is easily soluble in water and ethanol. It is a gaseous state at room temperature, usually in the form of an aqueous solution. It is a very strong bactericide with antiseptic, sterilizing and stabilizing effects. The 35-40% formaldehyde aqueous solution is commonly known as 'formalin'. Determined by the World Health Organization as carcinogenic and teratogenic substances. Reasons for the generation of formaldehyde in wood-based panels (1) The glue used for the bonding of the board substrate is one of the main reasons for the generation of formaldehyde. At present, the main glues on the market are urea-formaldehyde glue and melamine glue. The production process of urea-formaldehyde glue is simple and does not require high equipment. Most of them are produced by many small workshops. However, the amount of formaldehyde released is large, but because of its low price , Mainly used by wood board, medium and low-density fiberboard, which use a large amount of glue when the substrate is bonded. The content is lower, but the price is much more expensive than urea-formaldehyde glue, and it is generally used for high-end sheets. (2) When the wood itself is dry, formaldehyde is generated due to internal decomposition. The lower the wood density, the stronger the formaldehyde emission ability. The effects of formaldehyde on human health are mainly manifested in abnormal sense of smell, irritation, allergies, abnormal lung function, abnormal liver function and abnormal immune function. When its concentration reaches 0.06-0.07 mg per cubic meter of air, children will have mild asthma. When the indoor air content of formaldehyde is 0.1 mg per cubic meter, there will be peculiar smell and discomfort; when it reaches 0.5 mg/m3, it can irritate the eyes and cause tearing; when it reaches 0.6 mg per cubic meter, it can cause throat discomfort or pain. At higher concentrations, it can cause nausea and vomiting, coughing, chest tightness, wheezing and even pulmonary edema; when it reaches 30 mg per cubic meter, it can cause immediate death. Extended reading: Five major detection methods to check whether the formaldehyde in the home exceeds the environmental protection standard for wood-based panels. The environmental protection detection method for wood-based panels is to use the perforation method to measure the amount of formaldehyde taken out of the panel after a certain number of holes are passed through the panel. At present, the standards referenced by plates on the market are roughly divided into national environmental protection standards and European standards. The parameters are: national standards (GB 18580-2001, GB/T 17657-1999) European environmental standards E0 level. Formaldehyde content per 100 grams of product ≤5mg (≤5mg/100g) Formaldehyde content in each 100g product of E1 ≤5-10mg (≤5-10mg/100g) Formaldehyde content in each 100g product of E2 ≤10-30mg (≤10-30mg) /100g) Digression: Here are a few standards for everyone: 1. The formaldehyde content specified by the World Health Organization (WHO) in the drinking water quality and safety guidelines is less than 0.9 mg/L; 2. The highest formaldehyde in the room air The allowable concentration is 0.08 mg/m3; (Reference material: GBT 16127-1995 Hygienic standard for formaldehyde in indoor air) 3. The formaldehyde content specified by the national standard for drinking water in China is less than 0.9 mg/L; (Reference material: mandatory National standard GB5749-2006) 4. The formaldehyde content specified in the national standard 'Hygienic Standard for Fermented Wine' is less than 2 mg/L; (Reference: National Standard GB2758-2005) 5. The National Standard of the People's Republic of China 'Solid Composite Flooring' stipulates :The formaldehyde emission of type a parquet is less than or equal to 9 mg/100 g; the formaldehyde emission of type b parquet is 9 mg-40 mg/100 g; (examination data: national standard GB/T 18103-2000) 6 The 'Technical Requirements for National Environmental Labeling Products-Artificial Wood Panels' stipulates that the formaldehyde emission in artificial panels should be less than 0.20 mg/m3; the formaldehyde emission in wood floors should be less than 0.12 mg/m3. (Reference: HJBZ 37-1999) So, although formaldehyde is a toxic substance, you don’t have to talk about formaldehyde and its color changes. According to scientific reports, even the apples we eat contain a certain amount of formaldehyde. Further reading: What factors determine the amount of formaldehyde released? There are a few small ways to decorate the air: 1. If it is purely to deodorize, you can use onions, peppers and other heavy odors to put them in the meantime. 2. In addition to deodorizing but also to remove formaldehyde pollution, you can use the more widely used activated carbon, including bamboo charcoal, charcoal, etc., which are sold in the market, and the price ranges from a few to dozens of yuan. 3. Ask a professional air management company for governance. No matter which of the above methods is adopted, it is impossible to completely remove the formaldehyde brought by decoration and furniture products, but it can reduce the pollution until it reaches the environmental protection standard. I suggest that you must maintain ventilation for newly decorated houses. It is best to move in after the renovation is finished vacant for a few months. During the vacant period, all windows should be opened to allow ventilation to accelerate the volatilization of formaldehyde. In addition, before purchasing furniture products, you must carefully choose products that meet environmental protection standards to fundamentally reduce formaldehyde emissions.
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