Glued plywood is a wood-laminated panel, which consists of three or more canvases of peeled veneer. The sheets are glued together so that in adjacent layers the fibers are arranged mutually perpendicularly. This allows for tensile and bending strength. The material is durable and resistant to all kinds of external conditions according to the type of mechanical stress, the influence of water, etc. Plywood copes well with moisture. As for its some brands, that you can use them even in shipbuilding. That is why this product of the industry has found wide distribution in many areas. In everyday life, it is quite difficult to do without this material, unique in its properties, with the qualities of which other analogues of modern production are not able to compare.
Production Features
The veneer used in the production is thoroughly dried, and then adhesive compositions are applied to it using rollers. The material undergoes mechanical processing, which involves the impact of the press for gluing. After the sheets of the future plywood were glued, they are cut from all sides. They use special machine equipment for this, and then the goods are sorted according to the standard. In order to glue veneers, compositions of plant and animal origin are used, synthetic resin substances are sometimes used. Glued plywood, as a rule, consists of an odd number of layers, which can vary from 3 to 5. However, there can be many more, which significantly increases the strength characteristics of the final product.
GOST
In the production process are guided by GOST 8673-93, which involves the use of seven or more layers. On sale you can find sheets of the following sizes: 1525x1525, 1220x2440, 2440x1220, 1500x3000, 3000x1500, 1525x3050, 3050x1525 mm. Depending on the level of water resistance of the adhesive joints, the material may have the usual qualities of resistance to moisture. At the same time, the FC marking is affixed. The canvas may have increased water resistance. In this case, the plywood is made on the basis of phenol-formaldehyde resin, while the marking will look like “FSF”. For the production of paintings, imported equipment is used, and the requirements prescribed by the technology are observed. Raw materials must pass input control, and then sawn into individual churaks, the length of which is exactly 1630 millimeters. At the same stage, sorting by diameters and rocks takes place, the sheets are bundled and heat treated. After this, the raw material goes to improved machines, where veneer is formed, the thickness of which is 1.5 millimeters.
Heat treatment
Received technological waste is used for the manufacture of fiberboard. Glued plywood during the processing of veneer is dried at a temperature of 280-300 degrees. At the time of passage of the press, the web is exposed to temperatures in the range of 115-135 degrees. After the plywood has been obtained, it is cut to the desired size, polished, and then sorted. Then the material passes quality control, and then goes on sale. The thickness of the sheet can vary from 4 to 22 millimeters.
Varieties of plywood
When there is a need to make furniture, as well as make interior decoration or produce high-quality packaging, then plywood of the FC brand is used. The second of the above varieties is used in the arrangement of the roof, the production of packaging, as well as in frame housing construction. The surface of the plywood can be processed in many ways. For example, it may not be exposed to grinding, then the marking looks like "NS". Grinding can be one-sided, and such a product can be recognized by the abbreviation "1". The surface can be processed on both sides, this is indicated by the designation "2". Glued plywood can be transverse and longitudinal, which determines the location of the fibers in the upper layers. If soft and hard wood species are used in the production , the final product can belong to different grades and types, each of which will differ in purpose, price, duration of life, and appearance. Among other things, the material is classified by source of raw materials. It can be birch or coniferous wood. It is important to distinguish plywood sheets for their intended purpose. They can be designed for the needs of industry, construction, furniture production, packaging activities or structural purposes. According to the type of processing, plywood can be laminated.
The main features of the material
Glued plywood (GOST 8673-93 is strictly observed during production) can be made of ash, alder, beech, birch, linden, aspen, maple, spruce, fir, larch, cedar, oak or elm. The breed of the final product is determined by the wood from which the outer layers are formed. If the sheet thickness exceeds 12 millimeters, then this material is already called plywood board. That is how it appears on sale. The surface can be revetted with valuable species of wood, from which planed veneer is formed. As a coating, decorative paper-laminated plastic can be used , which perfectly mimics the structure of natural wood of valuable species. If we consider the advantages of this plywood, then, in comparison with other lumber, it is not covered with cracks, does not warp at all and is almost equivalent in all directions in terms of strength. Sheets are transportable and well bent, which is very convenient. Water-resistant glued plywood has found its application in ship, car and auto construction. It is used in furniture manufacturing, construction and in economic engineering. They distinguish plywood, which can be equal. At the same time, it is glued so that all the sheets are the same in thickness. The canvas can be uneven. In this case, the sheets have different thicknesses. As a rule, middle sheets are more massive. In the latter case, the veneer sheets are arranged symmetrically across the thickness of the material, this is done in order to avoid excessive warping.
Cost
Glued plywood, photos of which are presented in the article, can cost differently, depending on the characteristics of the production and brand. For example, a sanded sheet, the dimensions of which are equal to 1525x1525x10 mm, costs 538 rubles per 1 piece. The density is 450 kg per cubic meter. If we are talking about unpolished plywood, then its price will be equal to 468 rubles per sheet. The dimensions of the sheet remain the same, as well as its density. As for the sanded canvas of a more impressive thickness, it costs 868 rubles per 1 sheet. The dimensions are 1525x1525x18 mm. The density remains the same. If you need to purchase polished material, the thickness of which is 20 millimeters, then for 1 sheet you will have to pay 978 rubles. The length and width remain the same as the density. A sanded sheet, whose thickness is 4 millimeters, will cost 258 rubles per 1 piece. Other parameters remain the same. As for an unpolished canvas of the same thickness, its price will be slightly less. It is equal to 228 rubles per 1 sheet. A polished product, the thickness of which is equivalent to 6 millimeters, costs 358 rubles (one canvas). The basis of this material is coniferous wood. Density can reach 700 kg per cubic meter. Eight-millimeter unpolished plywood will cost the buyer 388 rubles per sheet.
Description of the laminated panel of the FOF F / F brand
The material may have the following dimensions: 2440x1220 and 2500x1250. The ends of the sheets during the production process are treated with special paint, which provides moisture resistance. If the canvas will be manufactured using technology, then it can last a long time, undergoing several tens of pouring cycles. This laminated plywood is also known as Finnish. Today, this variety is produced on domestic equipment. However, in the course of work, imported films are used. Thanks to the laminated surface, plywood is highly resistant to all kinds of environmental influences. This allows the use of this material in the construction of wear-resistant surfaces. It can be billboards, concrete reusable formwork, sheathing of floors, walls and wagons. If necessary, you can purchase a large format of laminated plywood. In this case, the product can be painted in various colors. This allows you to use the material in the production of children's playgrounds. Glued plywood (GOST must be observed during production) has anti-slip characteristics, which allows it to be used for the installation of boat floors and motor vehicles.
Positive features of laminated plywood
Multilayer glued plywood has high wear resistance, it can be laid quite quickly. Among other things, it is easy to process. It perfectly tolerates aggressive environments, as well as all kinds of cleaning and detergents. On sale you can find options for embossed and smooth surfaces. The consumer has the opportunity to choose any color from a wide range.
Description of the brand FSF
Glued plywood from wood chips has several layers. They are glued together with special compounds. The variety can be determined by the number of knots per square meter, as well as the degree of processing and the type of wood. The fewer flaws on the surface, the higher the cost. It is important to pay attention to density. The higher this indicator is, the higher the quality. For example, beams made of glued plywood are made. In general, this material has a wide area of use. It is used for the construction of temporary buildings, in the arrangement of roofs, fences, as well as in the production of formwork. The latter will be inexpensive, but its quality will be on top. If we are talking about coniferous plywood, then its surface is not polished and has a natural resinity, which gives the products a quality of resistance to decay. Thanks to the use of resin glue, you can not be afraid that the plywood will delaminate under the influence of rain, wind and sun. The ratio of quality and price of this material are comparable.
FBS brand plywood
This bent-glued plywood has the qualities of increased moisture resistance. This allows you to use it in the manufacture of yachts, boats and boats. Production is made from veneer sheets, which undergo preliminary peeling. The sheets are impregnated with bakelite varnish made on an alcohol basis.
Conclusion
Glued plywood furniture is durable and durable. This material is widely used in many areas of construction and industry. He occupied his worthy niche in the market. Its quality does not remain underestimated by consumers.