The board is divided into four grades according to the processing technology and environmental protection degree: E0, E1, E2, E3, and the environmental protection grade standard of solid wood is common. Among them, E0, E1 and E2 plates are allowed to be used as furniture substrates. E2 grade formaldehyde content is 10-30 mg/100 g. This is in line with domestic environmental protection standards. E1 grade formaldehyde content is less than or equal to 1.5 mg/100 g in line with European environmental standards. E0 grade formaldehyde content of less than or equal to 0.5 mg / 100 g is the world's top environmental standards.

However, the current furniture industry is chaotic and the standards are different. Therefore, although consumers choose environmentally friendly products when purchasing furniture, they may not actually be environmentally friendly,” said a senior expert in the domestic furniture industry. Some furniture standards are industry standards, and some are standards set by local quality supervision departments. Some places carry out random inspections, and some places carry out inspections. How can I judge whether a product is qualified based on such a paper test report?"

According to the indoor environment experts of "Guanwei", in the "Limited Hazardous Substances in Interior Decoration Materials Adhesives" (GB18583-2001) standard, the free formaldehyde, benzene, toluene + xylene, TDI and TVOC in the adhesive were made. Limited edition, however, "Limited Hazardous Substances in Wooden Furniture" only requires the detection of formaldehyde emission in the board, and does not require the detection of free formaldehyde, benzene, toluene + xylene, TDI and TVOC in the adhesive. For the above reasons, the furniture manufacturer only considers the formaldehyde emission amount of the sheet to be qualified for the test data, and considers that the product is environmentally friendly furniture.

Experts believe that the key to solving furniture pollution disputes is to change the testing methods, revise the testing standards, and try to be in line with international standards. Experts said: "In the detection method, the environmental test chamber method can be used to test the concentration of harmful substances in furniture." Some developed countries such as the United States have replaced the dryer method with the environmental test chamber method (climate chamber method). The environmental test chamber testing technology has been basically mature, and the results obtained by this method will be closer to the release of harmful substances under the actual use of furniture.

At present, the domestic furniture industry should revise the current "Limits of Hazardous Substances in Wooden Furniture" as soon as possible. It is necessary not only to carry out pollution testing on finished furniture according to standards, but also to monitor pollution of wooden furniture related materials such as paints and adhesives. "It should be limited to the amount of harmful substances in solvent-based wood coatings for interior decoration materials, "indoor air quality standards", "limited quantities of harmful substances in wooden furniture", "interior decoration materials - formaldehyde in wood-based panels and their products" The standards of release limit are echoed. Only when the standards are unified, can we promote the improvement of the environmental protection level of domestic furniture."

Self Adhesive Whiteboard

The steel sheeting of whiteboard has a certain thickness so that it does install with no wrinkles and no bubbles. At the same time,big size is the feature of soft whiteboard and this whiteboard sticker is consequently becoming increasing popular for the use as Whiteboard Wallpaper.

Self Adhesive Whiteboard

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