The plates are divided into finished wood (floats), plywood, blockboard, trim panels. Due to environmental problems, the proportion of sheet metal in the amount of home decoration has declined from the previous 5% to about 3% now.
① into the material in the white pine, in cubic meters as a unit. An irregular plate measuring the length of the shortest by the width of the board to take the 1/2 of the board. The formula for calculating the volume is the long multiply ride. General household white pine is 0.5-0.8 cubic meters.
② plywood has three percent, five percent, nine percent, twelve percent of the points. Three plywood is often said that the three plywood.
③ Blockboard grade standard E1 and E2 points. E1 ≤ 1.5 ㎎ / L, E2 ≤ 5.0 ㎎ / L. Blockboard pass rate is low, and now is better integrated board. Thickness is generally 18 mm, usually only about 17.2.
Consumers Association suggested that the vast number of consumers to buy the best time to buy a good reputable, large scale, logo complete building materials market or store, do not buy irritating smell large plate. Consumers at the time of purchase to see the plate marked on the level of formaldehyde emission, E1-class board can be used directly for indoor, E2-class board must be treated after finishing can be used indoors. In accordance with the requirements of national standards, the board grade is divided into excellent products, first-class goods, qualified three grades, such as the discovery of premium, preferred, special and other non-standard grade name, please do not buy. In the selection of blockboard, do not be smooth and smooth table and surrounded by tidy trimming of the confusion, we must pay attention to see whether the core plate rotten, moist wood and large empty. Good quality decorative board surface smooth, no burr, groove marks, no plastic and board pollution phenomenon.
Environmental protection level E0, E1, E2, etc., E0 most environmentally friendly, home decoration is best not to use E2 level
According to state regulations, the environmental protection level of wood is divided into three categories: E0, E1 and E2.
Environmental protection level E0 level: E0 level is the current national standards and related to the detection of ecological sheet of the highest environmental standards. Because the 0.5mg / l formaldehyde content is already a very safe numerical standard. According to relevant information, the formaldehyde content of drinking water is 0.9mg / l, that is, E0 grade formaldehyde content is less than drinking water.
Environmental level E1 level: in accordance with state regulations, the indoor plate environmental protection level must be achieved E1 level was considered standard, that is safe and environmentally friendly, the human body will not cause harm. In recognition of the quality of the plate at the same time, the most concerned about the furniture used by the formaldehyde emission of sheet metal. E1-level environmental standards are mandatory national health standards, is mandatory "safety standard line." E1 <= 1.5mg / l, that is, 1.5mg / l formaldehyde content is in line with national standards, is environmentally friendly, harmless to the human body.
Environmental level E2: E2 <= 5mg / l, E2 level of formaldehyde content has exceeded the national standard, the current production industry in the plate industry is very few E2 grade, E2 grade products must be treated after finishing to be used Interior decoration.
