In the past 16 years, the only mandatory national standard in the field of man-made board and its products in China, “Limited Release of Formaldehyde in Interior Decoration Materials, Wood-based Panels and Products†(GB18580-2001) has been revised for the first time, including one core revision. The content is to increase the formaldehyde emission limit value, cancel the original standard E2 level, and only keep the limit mark E1. The new standard will be formally implemented on May 1, 2018.
In the 2001 implementation of the standard, the formaldehyde release limit level was divided into E1 and E2, E1 requirements more stringent than E2. The new standard canceled the E2 level, retaining only the E1 level and increasing the formaldehyde release limit. Its provisions of formaldehyde emission limit value of 0.124 mg / cubic meter, limited identification E1.
At present, the industry has implemented different standards such as European standards and Japanese standards. This has made many people, especially consumers, unclear. Today, the elder sisters have organized relevant knowledge. A picture allows you to understand!
To speak of standards, we must first talk about the test methods produced by various standards. Different test methods will have different results and measurement units.
Climate Chamber Method -mg/m3
The amount of formaldehyde released by the wood-based panel in a cubic meter climate chamber is controlled at a constant temperature and humidity. The internal air circulation system The air in the climate chamber is repeatedly extracted and filtered by an aqueous solution tube to determine the content of the solution. Plate formaldehyde emission.
Perforation -mg/100g
Method: The amount of formaldehyde released per unit weight of the artificial board was measured: mg/100 g.
Principle: Drilling a sample, extracting the formaldehyde of the sample with benzene solvent, determining the amount of formaldehyde contained in the extract by titration, and then determining the weight ratio of the sample. General applicable object: MDF, particleboard.
Dryer method -mg/L
Method: The ratio of the weight of formaldehyde dissolved in the fixed dryer in the closed dryer to the weight of the corresponding solution in mg/L.
Principle: take a certain size, a certain number - artificial board sample, 24h, infrared spectrophotometer. General applicable object: plywood, blockboard.
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