Yesterday’s news: The risk monitoring results released by the Shanghai Bureau of Quality Supervision recently showed that 12 batches of solid wood composite flooring and 12 batches of stained-paper laminated wooden flooring selected by the city’s manufacturers, wholesale markets, building materials supermarkets, and building materials malls, There are 19 batches of formaldehyde released at a test temperature of 50°C that exceed the limits specified in the relevant standards. These floors are all designated as being on a geothermal floor or can be used in a warm environment. According to the national compulsory standard "the formaldehyde release limit of interior decoration materials in artificial boards and their products", the concentration of formaldehyde released from the artificial boards and their products under the test temperature of 22°C to 24°C shall not exceed 0.12 mg/m3. However, for the amount of formaldehyde released from geothermal floors, there is no clear limit to the current regulations or standards in China. In fact, the geothermal floor as a partition laying on the floor heating, the operating temperature is generally 35 °C -50 °C, under this environment, the adhesive in the floor is not involved in the reaction of formaldehyde, curing the adhesive layer aging degradation will release formaldehyde and accelerate Incremental release. When the floor is warmed up, the average home user will close the doors and windows. This situation further exacerbates the concentration of formaldehyde in the room and causes a large amount of harmful substances in the air to cause harm to the user's health. In the actual testing process, 19 batches of geothermal floors exhibited a formaldehyde emission of more than 0.12 mg/m 3 in the experimental environment of 50°C. Among them, Shanghai Yixing District Wangshi Wood Industry Sales Department, Suzhou Yishengjia Wood Industry Co., Ltd.'s 'Yili Jia' health fashion floor (specification model: 1222 mm × 202 mm × 12 mm, production date / batch number: 150118) released The formaldehyde concentration reached 0.68 mg/m3, exceeding the limit of 4.67 times. Shanghai Hans Wood Co., Ltd. production and marketing of 'Hans' reinforced laminate flooring (807 mm × 128 mm × 12 mm, 141,226) released formaldehyde concentration also exceeded the limit of 3 times. Other floorboards that emit formaldehyde at levels above the limit have many common geothermal floor brands such as Guanlin, North American Maple, Pinshen, Glinders, Luck, Belinda, Hongpeng, etc., which are mostly produced through the production of flooring. Manufacturers sell directly or enter Baianju market for external sales. Shen Weimin, deputy director of the Municipal Bureau of Quality Supervision, pointed out that although there are no corresponding standards to limit the amount of formaldehyde released from geothermal floors, the data from the risk monitoring shows that most manufacturers of geothermal flooring have not taken measures to release formaldehyde from their products at high temperatures. Effective control measures. According to reports, the 'culprit' of release of formaldehyde in geothermal flooring is glue. Enterprises can reduce the amount of formaldehyde and urea when making glue, or add appropriate additives in the process of making glue or adjusting glue. The moisture content of the raw materials, or the process of processing the finished floor, etc., to reduce the release of formaldehyde in the floor. At present, the Municipal Bureau of Quality and Technical Supervision has informed the product manufacturers and their local quality management departments of the risk monitoring results, and urges the enterprises to improve their quality levels and eliminate product quality and safety risks. It is reported that, in view of the problem of standard blanks, the Bureau of Quality and Technology Supervision will promote related social associations and other social organizations to formulate social group standards for releasing formaldehyde emission limits for geothermal floors and encourage enterprises to actively adopt higher standards and standardize their production and business operations. (For more information on plate, please pay attention to China Plate Trading Network /) Temporary Pool Fence,Temporary Pool Fencing,Temporary Pool Fencing Bunnings,Temporary Swimming Pool Fence Anping County Kairong Wire Mesh Products Co., Ltd. , https://www.krmeshfence.com