1, Daxinban comparison:
The national standard stipulates a number of quality standards for large core boards, including thickness dimension, web size, warpage, physical and mechanical properties, material defects, processing defects, moisture content, bonding strength, board surface defects, and formaldehyde emission limits.
Most of these rigorous inspections of quality indicators need to be performed in the laboratory, but consumers can judge their quality with simple and intuitive methods.
Appearance: Appearance should be flat and flawless, logo must be complete. The quality blockboard panel should be smooth and free from defects such as dead knots, digging and leaking. The thickness of the middle plate is uniform, there is no overlap, the phenomenon of sew-off, the splicing of the core board is tight, and especially the blockboard cannot be at both ends. There is chapped phenomenon. When erected, the corners should be straight and the diagonal error should not exceed 6 mm. The whole package of blockboards should fit completely between each board.
Touch: Touch the surface of the blockboard by hand. The high-quality blockboard should be dry, smooth and smooth.
Intrinsic quality: With good appearance quality, we should pay more attention to internal quality. Otherwise, the seemingly clean and clean core board looks like it is open, but the inside is not quite as good as it is—black dead wood, dead wood or lots of big gaps. The intrinsic quality must first check whether the filling materials are dense, whether there are obvious gaps and decayed wood, there may be eggs in the decaying wood, and insects will easily occur in the future. Look at the phenomenon of whether there is glue or putty in the surrounding area. This phenomenon is generally to compensate for internal cracks or voids.
Since the internal quality of the Daxin board cannot be known from the appearance, consumers can also judge it by a simple method - look at the Daxin board against bright light, such as the transparent white, the wooden strip is not closely stitched; when you pick up, you can hear the sound. The å± å± å± å± sound indicates that the gluing strength is not good; raise the end of a piece of blockboard and squat it. The high-quality blockboard should have a sense of integrity and heavyness. Of course, such a heavy feeling should be a good thing if the hand feels dry. Otherwise, it is not dry enough. Then, tap the surface of the plate with a sharp-nosed device to hear if there is a big difference in the sound. If there is a change in the sound, there is a hollow inside the plate. These phenomena will reduce the overall bearing capacity of the plate, and the long-term stress will cause the plate structure to be distorted and deformed, affecting the appearance and use effect.
Decoration materials knowledge decoration materials list cement decoration home decoration paint formaldehyde
Pvc Sterilizer For Water,Pvc Ultraviolet Sterilizer For Disinfection,Uvc Pvc Sterlizer,Uvc Pvc Sterlizer For Aquarium
Guangdong Kingrate Optoelectronic Technology Co., Ltd. , https://www.kingrateuv.com