Introduction of ten major plates

Introduction of ten major plates

2022-11-02
Introduction of ten major plates
Introduction of ten major plates
1. MDF
1. Concept: MDF is divided into medium density fiberboard (medium density board) and hard fiberboard (high density board), etc., the density of 450-800 kg/m3 is medium density fiberboard, and the density is above 800 kg/m3 It is hardboard. MDF is made of plant wood fiber as the main raw material, which is made by hot grinding, paving, hot pressing and other processes.
2. Features: MDF has a smooth surface, fine material, stable performance, firm edges, and good decorative properties on the surface of the board. However, the MDF has poor moisture resistance, and in contrast, the MDF has a worse nail-holding force than particleboard. If the screw is loosened after tightening, it is difficult to fix it due to the low strength of the MDF.
3. Uses: Mainly used for laminate flooring, door panels, partition walls, furniture, etc. MDF is mainly used for surface treatment of mixed oil process in home decoration.
4. Selection: MDF mainly detects the formaldehyde emission and structural strength. The MDF is divided into E1 and E2 grades according to the formaldehyde emission, and the formaldehyde emission exceeds 30mg/100g, which is unqualified. Generally speaking, most of the density boards of the scale of the production plant are qualified. Most of the MDF on the market are E2 grade, and E1 grade is less.

2. Blockboard
 
1. Concept: Blockboard (commonly known as large core board and wood board) is a plywood with a solid wood core. Its vertical (distinguished by the direction of the core board) has poor flexural and compressive strength, but its lateral flexural and compressive strength is relatively high. Most of the blockboards on the market are solid, glued, double-sided sanding, and five-layer blockboards, with a size of 1220 mm × 2440 mm.
2. Features: Blockboard has good screw holding power, high strength, firm quality, sound absorption, heat insulation, etc., and the moisture content is not high, between 10%-13%, easy to process, and the most widely used.
Blockboard is more stable than solid wood board, but it is afraid of moisture, so attention should be paid to avoid using it in kitchen and bathroom during construction.
The processing technology of blockboard is divided into two types: machine-made and hand-made. Hand-made is to manually insert wooden strips into the plywood. The extrusion force of the wooden strips is poor and cannot be processed according to cutting. It is only suitable for sub-projects of partial decoration. , such as the cushion wool board for solid wood floors. The machine-assembled plates are subject to large extrusion force, extremely small gaps, smooth splicing, uniform bearing capacity, and are not easily deformed after long-term use. The price of a good blockboard is between 70-140 yuan per sheet, and the poorer one is between 40-60 yuan. There are many kinds of materials for the inner core of blockboard, such as poplar, birch, pine, paulownia, etc. Among them, poplar and birch are the best, the texture is dense, the wood is not soft or hard, the nail holding force is strong, and it is not easy to deform. The texture of paulownia is soft, the water absorption is large, and it is not easy to dry. The hardwood is hard, not easy to be pressed, the splicing structure is not good, the nail holding force is not bad, and the deformation coefficient is also large.
3. Uses: furniture, doors and windows and covers, partitions, false walls, heating covers, curtain boxes, etc.
4. Selection: The surface of the blockboard should be flat, without warping, deformation, blistering and depression; the core strips are arranged evenly and neatly, the gap is small, and the core strips are free from decay, fracture, wormholes, knots, etc. Some blockboards cut corners, and the gap between the solid wood strips is large. If nails are nailed in the gap, there is basically no nail holding force. When consumers choose, they can look at the sun, and the gaps of the solid wood strips will be white. If the bonding strength of the blockboard is not good, there will be a "squeaking" sound of glue opening. If the large core board emits a fragrant wood smell, it means that the amount of formaldehyde released is less; if the smell is pungent, it means that the amount of formaldehyde released is more.
The quality of blockboard varies widely, and should be carefully checked when purchasing. First, check whether the core material is dense, whether there are obvious seams and decayed wood strips, and whether there are obvious seams and decayed wood strips. There may be insect eggs in the decayed wood strips, which are prone to moth-eaten in the future; then check whether there is any glue around. , The phenomenon of filling putty, this phenomenon is generally to make up for internal cracks or voids; secondly, tap the surface of the plate with a sharp-nosed appliance, and listen to whether there is a big difference in the sound. If the sound changes, it means that there is a void inside the plate. These phenomena will weaken the overall bearing capacity of the plate, and the uneven force for a long time will cause the plate structure to be distorted and deformed, affecting the appearance and use effect.

3. Plywood
 
1. Concept: Plywood is made by hot pressing of three or more layers of solid wood veneer or thin plate adhesive stickers of about one millimeter. Nine-point board, twelve-point board).
2. Features: good structural strength and good stability. Plywood contains a large amount of glue, so edge sealing should be done during construction to reduce pollution during the day.
3. Uses: Plywood is mainly used for various wood product processes such as the bottom plate of decorative panels and the back panel of panel furniture.
4. Selection: The selection of plywood mainly depends on its formaldehyde emission and bonding strength. If the bonding strength of the plywood is not good, it is easy to fall apart. When choosing, pay attention to whether the nominal thickness of the plywood matches the actual thickness.
When choosing plywood, pay attention to the following points:
①Plywood has the difference between the front and the back. When selecting, the plywood should have a clear wood grain, a smooth and smooth front, not rough, and should be smooth and non-stagnant.
② The plywood should not have defects such as damage, bumps, hard wounds, and scars.
③The whole board has no degumming phenomenon.
④Some plywood is made by pasting two veneers with different textures together, so in the selection, it should be noted that the joints of the plywood should be tight and there should be no unevenness.
⑤ When choosing plywood, you should pay attention to selecting plywood that does not loose glue. If the sound is brittle when knocking on each part of the plywood, it proves that the quality is good, and if the sound is dull, it means that the plywood has been loose.

4. Decorative panel
1. Concept: Decorative veneer veneer plywood (decorative panel, veneer panel) is a thin veneer with a thickness of more than 0.2 mm that is precisely sliced ​​from solid wood. Decorative plate for surface decoration.
2. Features: Decorative panels are generally used for clear oil decoration. The surface layer is thin and the board is a precious wood species, with natural and gorgeous texture. The base material is generally plywood, with stable and reliable performance.
3. Uses: Decorative panels are commonly used decorative materials for home decoration nowadays.
4. Choice: Some unscrupulous merchants make a fuss on the surface panel. The surface panel is too thin, with a thickness of only about 0.1. In order to prevent the color of the bottom plate from revealing, first paint a layer of paint with the same color as the surface panel on the bottom plate, and then paste the surface panel. Due to the poor adhesion between paint and glue, the bonding strength of the surface panel is poor, and it is easy to bulge. Consumers choose to use a razor blade to scrape the surface layer. If the paint is scraped, the thickness of most of the surface panels does not meet the standard.
High-quality decorative panels will make the room sparkle. After a period of use of inferior decorative panels, the surface will bulge and crack. Before purchasing decorative panels, you should pay attention to the following points:
①Recognize the difference between artificial veneer veneer and natural wood veneer veneer. The texture of the former is basically a straight texture, and the texture pattern is regular; while the latter is a natural wood pattern, and the texture pattern has a relatively large natural variability and is irregular.
② better decorative. The appearance of the decorative panel should have a good aesthetic feeling, the material should be meticulous and uniform, the color and luster should be clear, and the wood grain should be beautiful. The texture of the matching board and the parquet should be arranged according to a certain rule, the natural color is similar, and the patchwork is almost parallel to the edge of the board.
③ The surface should be free of obvious flaws. The surface of the selected decorative board should be smooth and clean, without burr groove marks and planer marks; there should be no glue penetration and board surface pollution (such as local yellowing and blackening); the surface should be selected as far as possible without cracks, cracks, knots, The natural warpage of the whole board should be as small as possible to avoid the phenomenon of sand penetration caused by improper sanding process operation.
④No glue opening phenomenon. It should be noted that bulging and delamination cannot occur between the surface veneer and the substrate, and between the layers inside the substrate.
⑤ The knife prying method is the most intuitive method to test the bonding strength. Use a sharp flat blade to pry it open along the rubber layer. If the rubber layer is damaged but the wood is not damaged, it means that the bonding strength is poor.
⑥ To choose the plate with low formaldehyde emission. When choosing, decorative boards with a pungent odor should be avoided.
⑦Choose good products with clear production enterprises. Most of the products with clear factory name, factory address and trademark have good performance.