How to buy a big core board to teach you to distinguish the quality of the big core board
Daxin board, also known as blockboard, is one of the main materials for home decoration. Its core is spliced ​​with natural wood strips, with a layer of wood skin above and below. Consumers generally can only see the appearance of Daxin board. Perhaps they feel that the big core board, whether it is a brand or a non-brand, is not very different from the surface. So, how to identify the quality of Daxinban? In fact, it is not difficult, as long as you master the four characteristics of the big core board - flatness, symmetry, stability and environmental protection, you can help you buy high-quality plate. 1. Smoothness: appearance should be smooth The quality of Daxin board is qualified. The most intuitive inspection method is to look at its appearance. The outermost layer of the big core board is a single board, and the high quality board has a thickness of 0.35 mm or more. The veneers produced by a regular factory are treated with double-side sanding. The appearance is smooth, the surface of the board is smooth, and there is no obvious color difference on the surface. The poor quality of the big core board due to the production process but off, the surface is often rough work, there are glitches, uneven conditions. Reminder: When checking the flatness, consumers should touch by hand, the stronger the smooth feeling, indicating that the surface treatment of the plate is in place. 2. Uniformity: Core board splicing should be symmetrical Whether the big core board is firm and durable depends on the material and process of the third layer core board. When purchasing, it is also important to observe the structure of the large core board from the side. Dr. Shen Liming, general manager of Ninghua Flagship Store of Dehua Bunny Decoration New Material Co., Ltd. introduced that, to get a large core board, it is necessary to carefully observe its side structure, especially the combined wood strip of the core board. The core board of the large core board on the market is mostly fir, and the proportion of the core board of the regular board produced by the regular manufacturers is even. The width of the single board is about 5 centimeters. When the consumer purchases, in addition to checking the width of the core plank, it is also necessary to check whether the two core planks are tightly spliced ​​and there is no obvious gap. The poor quality Daxinban wooden splicing is not tight and the gap is obvious. In order to cover up this defect, some manufacturers fill the cracks in the wood strips with putty, gypsum powder and other materials. Consumers can look at the side of the big core board. If there is a phenomenon of glue repair and putty stuffing, there may be gaps or voids inside. Reminder: If the business allows it, consumers can saw a corner of the big core board and observe the structure of the inner wood core. Bars with bark, boreholes, and dead knots cannot be used for small wood strips that are spliced ​​in the middle. The quality of the large core board, the connection between the wood is very dense. 3. Stability: The thicker the plate, the more stable Daxin board can be divided into core board, middle board and panel three layers from inside to outside. The second layer of the large core board is usually referred to as the middle board, and mainly serves to stabilize the core board. Therefore, the thicker the middle board, the better the stability of the large board. The middle plate of the upper plate is thin, which may cause insufficient bending resistance of the large core plate, and the thickness of the middle plate of the lower plate is appropriate. Since large core boards are multilayer structures, the quality of each layer of material will affect the overall quality. In order to save costs, some small manufacturers produce large core plates that use thin plates, resulting in insufficient bending resistance of the large core plates. If bent hard, such a large core plate is easily split from the gap between the two core strips. In addition, when many merchants sell plates, they are piled up one after the other. When consumers choose large core plates, they can look at the side of each plate in the stack and observe whether the plate thickness is the same. If the thickness is basically the same, it means that the plate processing technology is of higher quality and the quality is also guaranteed. Reminder: To identify the quality of the large core board, you can also tap the surface of the board to hear the difference in sound. If there is a change in the sound, there is a hollow inside the board. The overall strength of such a plate is relatively weak, and uneven long-term stress causes the structure of the plate to be distorted and deformed, which affects the appearance and use. 4. Environmental protection: environmental protection board to see grade Daxinban uses glue to glue the core strips and glue the core and surface veneers, which releases more or less free formaldehyde. When the free formaldehyde content exceeds a certain range, it will affect human health. Therefore, the main difference between environmental blockboard and inferior blockboard is the quality of glue. Experts said that because consumers can not verify on-site whether the formaldehyde release level of large core boards exceeds the standard, they can smell the smell of boards and make preliminary judgments on the environmental protection of large core boards. If the glue used is an eco-friendly glue, the big core board only has a dry woody smell and does not smell the pungent formaldehyde smell. If the big core board emits a pungent odor, it means that the formaldehyde emission is higher. In addition, consumers should not only pay attention to the Daxin board samples provided by the company, but also smell other materials stacked in the store. Because the sample may have been stored for a long time and the odor has been exhausted, consumers should smell the pungent odor near piles of large core plates, especially in the middle. Reminder: To verify whether the Daxin board is environmentally friendly, you can also check the environmental rating on the board or test report. Daxinban is divided into E0 grade, E1 grade and E2 grade according to the environmental protection standard, E0 grade big core board's formaldehyde emission ≤ 0.5 mg/L, E1 grade formaldehyde emission ≤ 1.5 mg/L, E2 grade formaldehyde emission ≤ 5 Mg/l. Among them, the environmental performance of E2 Daxinban is poor and cannot be directly used for interior decoration. Consumers should pay attention to distinguish when purchasing. Building materials knowledge plate entrance decoration formaldehyde decoration interior decoration family decoration decoration company Oil Drilling Machinery,Oil Drilling Hydraulic Elevator,Oil Drilling Tools,Oil Equipment Rugao Yaou Import & Export Trade Co., Ltd , https://www.ntyaoumachinery.com
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