A. The joinery board has the characteristics of good screw grip, high strength, firmness, sound absorption and heat insulation. The moisture content of blockboard is not high, which is between 10%- 13%. Easy to process, widely used in furniture, doors and windows and sleeves, partitions, fake walls, heating covers, curtain boxes and so on.
B, due to the internal use of solid wood strips, the requirements for processing equipment are not high, which is convenient for on-site construction.
Disadvantages:
A, due to the large use of urea-formaldehyde glue in the production process of blockboard, the formaldehyde emission is generally high, and the environmental protection standard is generally low, which is why most blockboards have a pungent smell.
B. At present, most joinery boards in the market cut corners in production, and there are large gaps when the solid wood strips are spliced, and there are holes in the boards generally. If nails are nailed in the gap, there is basically no nail holding force.
C, the solid wood strips inside the blockboard are spliced longitudinally, so the vertical bending and compressive strength is poor, and long-term stress will lead to obvious lateral deformation of the board.
D, the solid wood strips inside the blockboard are made of different materials and have different densities, which are easy to warp and deform after simple drying; The structure is twisted and deformed, which affects the appearance and use effect.
E. Because the surface of the joinery board is rough, carpenters usually use a lot of glue or paint when processing the surface on site, so the furniture made of this board is extremely environmentally unfriendly, which is also the main reason for the pungent smell when decorating. This kind of on-site furniture is the chief culprit of cancer and genetic mutation, which is very harmful to human body.
Second, particleboard is also called particleboard.
Particleboard is a kind of artificial board, which is made by cutting all kinds of branches and buds, small diameter wood, fast-growing wood and sawdust into pieces of certain specifications, drying them, mixing them with rubber, hardener and waterproof agent, and pressing them at a certain temperature and pressure. Because its cross section resembles a honeycomb, it is called particleboard.
Adding certain raw materials such as "moisture-proof factor" or "moisture-proof agent" into particleboard becomes what people usually call moisture-proof particleboard. Because of its strong moisture-proof performance and small expansion coefficient after water absorption, particleboard has a certain moisture-proof effect, which is widely used in cabinets, bathroom cabinets and other environments, but in fact it has become a tool for many inferior particleboards to cover up more internal impurities. Adding green dye into particleboard forms what is called green particleboard on the market at present. Many manufacturers use it to mislead it to become a green environmental protection board, but there is no scientific basis. Most of the top brands of particleboard at home and abroad are natural substrates.
Advantages:
A, with good sound absorption and sound insulation performance; Thermal insulation and sound absorption properties of particleboard
B, the inside is a granular staggered structure, the performance of each part is basically the same, and the structure is relatively uniform, so the nail holding force is good and the lateral bearing capacity is good.
C, strong moisture-proof performance, small expansion coefficient after water absorption, widely used as raw materials for cabinets and bathroom cabinets in humid environment.
C, the particleboard surface is flat, the texture is realistic, the bulk density is uniform, the thickness error is small, it is pollution-resistant, aging-resistant, beautiful, and can be painted and various veneers;
In the production process of F particleboard, the amount of glue used is small, and the environmental protection coefficient is relatively high.
Disadvantages:
A, the internal structure is granular, not easy to grind;
B, it is easy to cause tooth explosion when cutting the board, so it requires higher processing equipment;
Three, fiberboard (also known as density board)
Fiberboard is made of plant fiber as the main raw material through thermal grinding, sizing, paving, hot pressing and other processes. Fiberboard has different densities. The density below 450kg/m3 is called low density fiberboard, the density between 450-800kg/m3 is called medium density fiberboard (MDF), and the density above 800kg/m3 is called hard fiberboard (HDF). Density board is mainly used to produce finished furniture, and also used to strengthen wood floors, door panels, partitions and so on.
Advantages:
A, the surface of fiberboard is smooth and smooth, and the material is exquisite, which is convenient for modeling and milling.
B, fiberboard toughness is good, in the case of small thickness (such as 6MM, 3MM) is not easy to break.
Disadvantages:
A, fiberboard has poor moisture resistance and large expansion coefficient after water absorption.
B, the inside of the fiberboard is in a powdery structure, the nail holding force is poor, and the screws are easy to loosen after being tightened.
C, because the strength of fiberboard is not high, the height of furniture should not be too high, mostly 2100 mm.
E, in the production of fiberboard, due to its internal structural characteristics, the amount of glue used is large, and the environmental protection coefficient is low to some extent.
Fourth, solid wood fingerboard
Finger joint board, also known as integrated board, integrated board and finger joint board, is a kind of board made of small pieces of solid wood after deep processing like "fingers". Because the interface between plates is serrated, similar to the cross joint of two fingers, it is called finger joint plate. Because the logs are cross-glued, the gluing structure itself has a certain adhesive force, and because there is no need to stick panels up and down, the amount of glue used is extremely small.
Advantages: Because there are few seams and less glue used in solid wood jigsaw puzzle, the environmental protection coefficient is relative.
Higher. Easy processing, cutting, drilling, sawing and molding.
Disadvantages: the solid wood finger joint plate is easy to deform and crack. The quality of good solid wood finger joint board is guaranteed, but the cost is higher.
Five, solid wood particle board
The so-called solid wood particleboard is actually the board produced by the process of particleboard, and it is also a kind of particleboard belonging to homogeneous particleboard.
Homogeneous particleboard, scientifically called oriented structure particleboard, is a product made of small diameter wood, thinning wood, wood core, veneer and branch wood. And processed by special equipment to grow 40 mm, 70 mm, 5 mm, 20 mm wide, 0.3 mm thick and 0.7 mm thick. After drying, sizing and special equipment, the surface layer and core layer are laid crosswise and directionally, and then hot-pressed and formed. After the shavings are dried by advanced single-channel dryer, the expansion coefficient of homogeneous particleboard is small and the moisture-proof performance is very good. Its shavings are spread layer by layer, so the internal texture is uniform, and it is superior to ordinary particleboard and powder density board in nail holding force, bending resistance and stability.
As a high-grade environmental protection substrate, oriented structure particleboard has been widely used by European and American furniture manufacturers, and also widely used in the domestic high-grade panel furniture market.
Six, multilayer solid wood board
Multi-layer solid wood board is made of criss-crossing multi-layer plywood as the base material and high-quality solid wood veneer or technical wood as the fabric on the surface, through cold pressing, hot pressing, sanding, curing and other processes.
Because the multilayer solid wood board has the characteristics of difficult deformation and good indoor temperature and humidity adjustment performance, the surface solid wood veneer material has the texture and feel of natural solid wood and has stronger selectivity. Therefore, it is favored by consumers.
Multi-layer solid wood board structure has good stability, difficult deformation and strong quality. Due to vertical and horizontal gluing and high temperature and pressure, the deformation defect of solid wood board is solved from the aspect of internal stress. Self-made high-quality environmental protection glue is used in the production process, so that the formaldehyde emission limit of the product meets the requirements of national standards and is green and environmentally friendly.
Major domestic plate brands
Board: Fuhan Board, Tengfei, Peng Hong, Qiu Jin.
Domestic particleboard: Daya and Lushuihe
Imported particleboard: kronos Aige Company.
Patch Panel: Lucky, Robin.
Multilayer board: Meiya
General specification for furniture plates
Common specifications: L2440*W 1220
Common thickness: 3mm, 5mm, 6mm, 9mm, 12mm, 15mm, 16mm, 18mm, 25mm.
After understanding the board, we also need to understand another aspect that is closely related to the environmental protection that we are most concerned about at ordinary times-the veneer of the board.
We usually refer to Daya plate, Lushuihe plate of Jilin Forest Industry, Iger plate and so on. We went to the furniture factory before surface treatment, but what we usually see is the effect achieved by different surface treatment processes. The following mainly talk about several common finishing methods besides painting.
Melamine finishing
Because last year's "milk powder door" incident made melamine really popular, most ordinary people still don't know what melamine is, so that Shunshui was almost regarded as an accomplice of a milk powder brand when introducing melamine to customers. After coming back, he felt a lot. Baidu scribbled this article "Melamine Readme", and interested friends can step on it again. Well, it's far. Pull it back.
Melamine decorative paper is made by printing patterns on the surface of decorative paper, dipping in melamine glue, and then hot pressing on the board substrate at high temperature. Because of its high requirements for the surface smoothness of the substrate, it is usually used for the surface decoration of particleboard and medium density fiberboard. This kind of board with melamine veneer is usually called melamine board. Its surface texture is realistic, wear-resistant, scratch-resistant and waterproof. Suitable for production, mainly used in the manufacture of panel furniture.
The decorative paper of melamine board can be divided into thickness (gram weight), imported paper and domestic paper, and the ink printed on the surface can be divided into imported ink and domestic ink, and its effect is also very different.
According to the different dipping process, it can be divided into three types: total triamine glue and semi-triamine glue, and the wear resistance coefficient of semi-triamine is not as good as that of total triamine.
According to the different steel plates when decorative paper is hot pressed, it can be divided into smooth surface, pitted surface, embossed surface, cloth pattern, corrugated surface and rain silk surface.
Wood veneer wood veneer: Wood veneer is bonded to medium density fiberboard/particleboard/multi-layer solid wood by high-temperature hot pressing to become wood veneer wood veneer. Because wood veneer can be divided into imported and domestic products, and precious wood can be divided into ordinary wood, the selection range is very wide, so the grade of wood veneer is determined according to the material type and thickness of wood veneer.
The surface of solid wood veneer must be painted, because veneer and painting process are different, and the same veneer is easy to make different effects, so the veneer of solid wood has higher requirements on veneer and painting process.
Solid wood veneer has become the main decoration method of high-end furniture at home and abroad because of its true and natural feel and high grade, but its related materials and manufacturing costs are high.
At present, a kind of scientific and technological wood veneer is popular in China, which is favored by consumers because of its true and natural texture, diverse patterns, no color difference and large format.
Cat's eye paper is a relatively thin decorative paper (also called Boeing film), mostly made of PVC, which is sealed with paint after being stuck on the surface of furniture with white latex. Because of its easy grinding and molding, it is mainly used for surface decoration of medium density fiberboard. At the same time, cat's eye paper veneer has poor wear resistance, easy to leave scratches and easy to be discolored by bubbles, but the cost is relatively low, which is the preferred veneer method for many finished furniture in China at present.
Boeing film:
Solid wood veneer and fireproof board facing
Sticking solid wood board (the surface needs to be painted on site) and fireproof board on the above-mentioned base material is mainly used for wood surface decoration made by hand on site. Due to the large amount of adhesive, all-purpose adhesive has a pungent taste and is extremely environmentally friendly. At the same time, due to the different glue quality, sizing and pasting process, it is easy to bubble and fall off.
Fireproof board and solid wood board:
Attachment: Fire-proof board: Fire-proof board is a decorative board made of siliceous or calcareous materials as the main raw materials, mixed with a certain proportion of fiber materials, lightweight aggregate, adhesive and chemical additives, and autoclaved. Fire boards have good high temperature resistance, wear resistance and chemical resistance, and some fire boards can bend after being heated. Fire boards cannot be used alone. Generally, it should be pasted on the surface of man-made board or wood. Because the fireproof board is dry-shrunk, it is easy to open the glue without paying attention to the process when pasting, so the requirements for viscose are higher during construction, and the price of the fireproof board with better quality is more expensive than that of the ordinary decorative board. Generally, the thickness of fire protection board is 0.8 mm, 1 mm and 1.2 mm. ..
Several small methods of air treatment in decoration;
1, if it is pure deodorization, you can put it in with strong smells such as onions and peppers.
2. Besides deodorization, it can also remove formaldehyde pollution. Activated carbon can be used, including bamboo charcoal and charcoal. There are some in the outside market, and the prices range from a few to dozens. You can also raise some green plants to purify the air, but you can't completely eliminate them.
3. Please ask a professional air treatment company to handle it.
No matter which of the above methods is adopted, it is impossible to completely remove the formaldehyde brought by decoration and furniture products, but it can reduce its pollution until it reaches the environmental protection standard. It is suggested here that newly-installed and repaired houses must be kept ventilated, and it is best to leave them vacant for several months after renovation, and then move in. During the vacant period, open all the windows and let them ventilate to accelerate the volatilization of formaldehyde. In addition, before buying furniture products, we must carefully choose products that meet environmental protection standards to fundamentally reduce the release of formaldehyde.
I hope the above knowledge can help everyone. . . . . .