English
Plywood, commonly known as plywood, is a natural log that is softened by steaming. The log is used to rotate along the annual rings into large sheets (veneers). The thickness is generally 2.7mm-20mm or more. According to the principle of symmetry, it is generally composed of three or more layers with a thickness of one millimeter The thin veneer, which is perpendicular to each other according to the direction of the adjacent layer of wood grain fiber, is a three-layer or multi-layer (usually odd-numbered layer, 3-13 layer) plate-shaped after drying, plate making, gluing, hot pressing and gluing. material. The surface of the high-quality products is flat and smooth, no degumming, sand damage, crushing, no obvious color difference, no stains, good dimensional processing accuracy, small thickness deviation, bonding strength 0.7Mpa, and moisture content 6-14%. Usually used as substrates, but also as panels, which can be used in construction, interior decoration, furniture manufacturing, shipbuilding, packaging and other industrial products.
First, look at environmental protection when buying splints. It depends on whether the amount of harmful gas released meets the national standards, especially whether the free formaldehyde released by the glue exceeds the standard. Second, look at the material. Different tree species have different prices. Consumers can choose varieties of different materials according to different needs. Again, look at the workmanship. The plywood plywood has a difference between positive and negative. When selecting, it depends on whether there is degumming or loose glue. You can tap each part of the plywood with your hands. If the sound is crisp and uniform, the quality is good. If the sound is dull and uneven, it means that the splint has appeared. Loose glue phenomenon. Finally, look at the appearance. When consumers buy, they must see for each piece of plywood whether there are blisters, cracks, worm eyes, bumps, no marks, defects, and too large repair tape. Some plywood has two different lines. The veneers are pasted together, so when choosing whether the splint joints are tight, there is no unevenness.
