Wood-based panel products are products that implement the production license management system. When consumers purchase, they must first see whether they have the “QS†mark and whether the production license number is clearly marked. How to choose specifically, as follows:
First, the selection of plywood
The adjacent layers of ordinary plywood have wood grain which is "vertical" to each other, and the number of layers is odd. The grades are classified into four grades: special grade, first grade, second grade, and third grade.
1, the appearance of the selection of the table smooth and smooth wood grain clear, the glue layer can not have bubbling, stratification. Avoid selecting the panel splicing seams, laminations and core panels. Plywood larger than 6 mm should also determine whether the warpage exceeds the standard. The warpage of the special board should not exceed 0.5%, the first and second boards should not exceed 1%, and the third board should not exceed 2%.
2. Do not buy plywood with a thickness of less than two pounds.
3, pay attention to the release of formaldehyde in the plywood, the state prohibits the sale of formaldehyde emission of more than 5.0mg / L of the board for indoor decoration.
4. While paying attention to the limit of harmful substances, do not neglect the bonding strength of the plywood itself. In the selection, the plywood can be tilted along the glue layer with a small knife to observe the traces of the residual wood on the adhesive layer. If there is more wood left on the peeling surface, the quality of the plywood is better. For example, the veneer of the plywood is peeled off along the rubber layer, and the residual wood is not seen on the adhesive surface, which proves that the strength of the wood has not been fully exerted and the rubber layer has been destroyed. Therefore, the bonding strength is poor.
Second, the selection of decorative veneer veneer plywood
1. It is necessary to distinguish whether the decorative veneer is a natural wood veneer or an artificial veneer veneer. The natural wood veneer is made of precious natural wood, which is made of sliced ​​processing method. The natural wood veneer pattern is natural and has certain variability. The artificial thin wood texture is basically straight and the pattern has certain rules.
2, select decorative veneer veneer plywood should pay attention to decorative, decorative material should be fine and uniform, clear color, beautiful wood grain, texture should be arranged according to a certain rule, the seam and the edge of the board should be parallel. The surface of the selected decorative board must be smooth, free of burrs, groove marks, no penetration and surface contamination, and the surface must be free of knots, cracks, resin-free bladders, resin channels and skins.
3, do not choose a plate with irritating odor, see the level of formaldehyde emission clearly, E1 level indicates that the formaldehyde emission should be less than 1.5mg / L, E2 level means that the formaldehyde release should be less than 5.0mg / L.
4. After understanding the level of formaldehyde emission, do not neglect the surface bonding strength of the veneer veneer and the bonding strength of the substrate. The decorative veneer is not too thin, and there should be no peeling and delamination between the surface veneers and the substrate. The veneer veneer of the veneer is divided into: superior products, enamel, etc. Three grades of qualified products.
Third, the selection of blockboard
1. The blockboard is usually a five-layer symmetrical structure, which is made up of a surface plate, a core plate, a core of a core, a blank, and a hot press. The core splicing split core strip glue fights and does not glue fight and checkered core. The products are divided into three grades: excellent grade, enamel and so on.
2, the selection of blockboard, must not be confused by the smooth and smooth cutting of the surrounding sides of the table, must pay attention to the inner "core" beauty, the quality of the core strip material and whether the stitching is dense and directly affect the blockboard Strength, if available, it is best to randomly take a saw from a large stack of sheets to see if the width of the core strip is greater than 2.5 times its thickness, and whether the distance between the two ends of the adjacent two rows of core strips is More than 50mm, whether the length of the core strip is greater than 100mm, whether the gap on the side of the core strip is less than 2mm, whether the gap of the end face is less than 4mm, and whether the core of the core is rotten, wet wood strips and large hollow holes, which directly affect the lateral static of the blockboard The problem of strength is difficult to identify from the outside.
3. Since the blockboard is made of wood and urea-formaldehyde resin as the main raw material, the product must have a certain formaldehyde release. If the index exceeds a certain limit, it will have a certain impact on personal health. A plate with a pungent taste. E1 grade plates with a formaldehyde emission of not more than 1.5 mg/L can be directly used indoors, and E2 grade plates of not more than 5.0 mg/L must be treated after finishing.
4. Selection of veneered wood-based panels (medium density fiberboard, particleboard)
1. Check whether the thickness and density are uniform, whether the corners are damaged, whether there are delamination, bulging, carbonization, etc., and whether there is a soft part.
2. When conditions permit, a small piece of artificial board can be sawed and immersed in water with a water temperature of 20 ° C for 24 hours to observe the thickness change, and observe whether there is a small drum kit on the board surface. The thickness varies greatly, and there are small drums on the board surface, indicating that the board surface is poor in water resistance.
3, select the artificial board with low release, choose the smell to smell, should choose the artificial board with less stimulation, because the greater the smell, the higher the amount of formaldehyde emission, the greater the pollution.
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