Do you know how to identify high-quality boards

2022-07-22
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The boards involved in home decoration mainly include: big core board (i.e. Blockboard), fir finger joint board (also known as fir integrated board), decorative panel, plywood, fireproof board, etc. Due to the wide variety, uneven quality and great price difference of these plates in the market, we need to master some basic identification methods in order to prevent the situation of shoddy products from happening

the boards involved in home decoration mainly include: large core board (i.e. Blockboard), fir finger board (also known as fir integrated board), decorative panel, plywood, fireproof board, etc. Due to the wide variety, uneven quality and great price difference of these plates in the market, we need to master some basic identification methods in order to prevent the situation of shoddy products from happening

(1) how to identify high-quality large core board. The professional term of big core board is called blockboard, which is usually made of two layers of plywood, with small pieces of wood in the middle, which are mechanically glued, pressed and spliced. Because there is a gap in the middle of the core material, it can resist thermal expansion and cold contraction and is not easy to deform. The standard specification of large core board is 2440mm× 1220mm, 12mm, 15mm and 18mm thick, with great hardness and strength. The total thickness of veneer glued on both sides of high-quality large core board shall not be less than 3mm; The same interlayer must be spliced with the same tree species or wood with similar physical properties, and it is not allowed to splice cork and hardwood together; The board must be dry, with a moisture content between 6% and 12%, without glue opening and bubbling, and the board surface must be flat without natural bending; The board core is neat and uniform, and the splicing is tight. Generally, the quality of the inner core can be accurately identified by sawing. Smell the smell, smell the glued part on the side. If there is a strong smell that stimulates the smell and eyes, it indicates that the environmental protection standard of the plate is not up to standard. The lower the formaldehyde emission, the smaller the smell, and the smaller the pungent taste, the better. The side and back of the Board shall be marked with clear and fadeless marks 30mm away from the board edge, including category, production date, manufacturer code and inspection code. If it is a paper mark, it does not conform to the national standard

(2) how to identify high-quality fir fingerboard. The specification of fir finger joint board is the same as that of blockboard, which is 2440mm× 1220mm, with a thickness of 18mm, 15mm and 12mm. The Chinese fir finger board is generally made of high-quality Chinese fir, which is peeled, cut and mechanically pressed. Unlike blockboard, the Chinese fir finger board has no glue layer, so it is relatively environmentally friendly and suitable for making furniture. The way to identify the Chinese fir finger joint board is roughly the same as that of the blockboard. The board must be dry, with a moisture content between 6% and 12%, and the board surface is flat, not rough, and free of natural bending (there will be some natural knots on the surface of the Chinese fir finger joint board, which is determined by the natural properties of its wood); The board core is neat and uniform, and the splicing is tight. The side and back of the plate shall be marked with clear and fadeless marks 30mm away from the plate edge, including category, production date, manufacturer code and inspection code

(3) how to identify high-quality decorative panels. First of all, we should distinguish between artificial decorative panels (also known as technological wood) and natural decorative panels. Generally speaking, the texture of artificial decorative panels is straight, regular and consistent in color, while the texture pattern of natural decorative panels is naturally variable, irregular (each board is different) and has subtle natural color changes

secondly, the decorative appearance of the decorative panel is good. The high-quality decorative panel has fine and uniform material, clear color, beautiful wood grain and similar wood color. The texture of the scientific and technological board is arranged according to certain rules, with clear grain and consistent color. The surface of the panel should be flat and smooth, without scratches and scars

third, the bonding structure of the high-quality decorative panel is stable, without glue opening, and the joint between the veneer and the substrate is tight, without blistering and delamination. You can use the knife pry method to test the bonding strength, and pry it along the bonding layer with a sharp blade. If the bonding layer is damaged, but the wood is intact, it indicates that the bonding strength is poor

fourth, smell the odor. If the irritating odor is strong, it means that the formaldehyde emission exceeds the standard, which will seriously pollute the living environment. Generally, the products of regular manufacturers are marked with the category, grade, manufacturer name, etc. of the decorative panel on the lower right corner of the back of the plate

(4) how to identify high-quality splints. The standard specifications of plywood and decorative panel are consistent with Blockboard. Plywood, also known as plywood, is usually 3mm/5mm/9mm/12mm thick, that is, we often say three centimeter board, five centimeter board, nine centimeter board and twelve centimeter board. There are front and back sides of the plywood. The front side of the high-quality plywood is bright and smooth, not rough, the surface is flat, the texture is consistent, the color is uniform, the bonding quality is good, there is no degumming, and there is no inner space. We can use a wooden stick about 50 cm long to stand up the plywood and gently tap each part. The sound is uniform and crisp. Basically, the superior plywood, such as “ Shell shell ” The dull sound is likely to be caused by internal quality problems caused by degumming and internal space. The splint shall be free of damage, worm grooves, row nail holes, dead joints, burrs, grooves and other defects. (5) How to identify high-quality fire boards. Fireproof board is a kind of expensive decorative board. Its surface material is a kind of indoor decorative decorative decorative material produced by impregnating kraft paper in resin and after high temperature and high pressure treatment. Its surface protective film has the characteristics of heat resistance, fire resistance and water resistance, so it is called fireproof board. When choosing a fireproof board, it depends on whether the color and texture of the whole board are consistent, whether there are color differences and defects, and whether there are bumps and blisters when touching it with your hand. The thickness of high-quality fireproof board has several specifications, such as 0.3mm, 0.6mm, 0.8mm, 1mm, etc. if the thickness is too thin, the waterproof and fireproof effect is correspondingly poor. Therefore, the fireproof board with qualified thickness and consistent thickness is the high-quality fireproof board. Inferior fireproof board has several characteristics: uneven color, simple design and color, fragile and easy to burst. Such fireproof board is also relatively poor in heat resistance, acid alkalinity resistance and wear resistance

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