Glued plywood: properties and applications

Glued plywood is a wood-laminated board, which consists of three or more paintings of peeled veneer. The sheets are glued together in such a way that in the adjacent layers the fibers are mutually perpendicular. This allows you to achieve tensile strength and bending strength. The material is durable and resistant to all kinds of external conditions by the type of mechanical loads, the effect of water, etc. Plywood perfectly copes with the effects of moisture. As for its some brands, that they can be used even in shipbuilding. That is why this product of the industry has found wide distribution in many spheres. In everyday life, it is rather difficult to do without this unique in its properties material, with the qualities of which other analogues of modern production can not be compared.

Production features

The veneer used in the production is carefully dried, and afterwards adhesive compounds are applied with the help of rollers. The material undergoes mechanical treatment, which presupposes the impact of the press for carrying out the pasting. After the sheets of the future plywood have been glued together, they are cut off from all sides. Use for this purpose special machine tools, and then the goods are sorted according to the standard. In order to produce gluing of veneer, compositions of vegetable 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, they can be much larger, which greatly 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. For 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 can have the usual qualities of resistance to moisture. At the same time, the marking "FC" is marked. Canvas can have increased water resistance. Plywood in this case is made on the basis of phenol-formaldehyde resin, whereas the marking will look like "FSF". For the production of canvases, imported equipment is used, and the requirements prescribed by the technology are observed. Raw materials must pass the entrance control, and afterwards it is sawn to individual chukraks, the length of which is equal to 1630 millimeters. At the same stage, sorting by diameters and rocks takes place, the sheets are bundled and heat treated. After that, the raw material is supplied to the improved machines, where a veneer is formed, the thickness of which is 1.5 millimeters.

Heat treatment

The received technological waste is used for the manufacture of fiberboard. Glued plywood in the processing of veneer is dried at a temperature of 280-300 degrees. At the moment of passing the press, the web is exposed to temperatures in the range of 115-135 degrees. After 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 produce furniture, as well as to make interior decoration of premises or to produce high-quality packaging, then the plywood of "FK" brand is used. The second of the above mentioned varieties is used for roofing, packaging, and frame house construction. The surface of plywood can be processed in many ways. For example, it may not be affected by grinding, then the marking looks like "NSH". Grinding can be one-sided, and such a product can be recognized by the abbreviation "Ш1". The surface can be processed from two sides, this is indicated by the designation "Ш2". Glued plywood can be transverse and longitudinal, which determines the location of fibers in the upper layers. If soft and hardwoods are used in the production, then the final product can refer to different grades and types, each of which will differ in purpose, price, 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 sheets of plywood by designation. They can be designed for the needs of industry, construction, furniture production, packaging activities or structural purposes. According to the type of processing, the plywood can be laminated.

Main features of the material

The glued plywood (GOST 8673-93 is strictly observed during production) can be made from ash, alder, beech, birch, linden, aspen, maple, spruce, fir, larch, cedar, oak or elm. 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 a plywood slab. This is how it appears on the market. The surface can be lined with valuable wood species, from which the planed veneer is formed. As a coating, decorative paper laminated plastic can be used that perfectly imitates the structure of natural wood of valuable species. If we consider the advantages of this plywood, then, compared with other sawn timber, it is not covered by cracks, it does not warp at all and is almost equal in all directions in terms of strength. Sheets are transportable and well bent, which is very convenient. Glued plywood moisture resistant has found its application in the ship, car and auto industries. It is used in the production of furniture, construction and in economic engineering. Distinguish plywood, which can be evenly layered. In this case, it is glued in such a way that all the sheets are the same in thickness. The canvas can also be non-layered. In this case, the sheets have different thicknesses. As a rule, the middle sheets are more massive. In the latter case, the veneer webs are arranged symmetrically along the thickness of the material, this is done in order to avoid unnecessary warpage.

Cost

Glued plywood, the photo of which is presented in the article, can cost in different ways, which depends on the features of production and brand. For example, polished sheet, whose dimensions are 1525x1525x10 mm, costs 538 rubles per 1 piece. The density is 450 kg per cubic meter. If it comes to unpolished plywood, then its price will be 468 rubles for one painting. The dimensions of the sheet remain the same as its density. As for polished cloth of 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. The sanded sheet, whose thickness is 4 millimeters, will cost 258 rubles per 1 piece. The remaining parameters remain the same. As for unpolished cloth of the same thickness, its price will be somewhat less. It is equal to 228 rubles for 1 sheet. Grinded goods, the thickness of which is equivalent to 6 millimeters, costs 358 rubles (one canvas). This material is based on coniferous wood. Density can reach 700 kg per cubic meter. Eight-millimeter unpolished plywood will cost the buyer 388 rubles for one painting.

Description of the laminated panel of the brand FOF F / F

The material can have the following dimensions: 2440x1220 and 2500x1250. The ends of sheets in the production process are treated with special paint, which provides moisture resistance. If the canvas will be manufactured using technology, it can last for a long time, undergoing several dozen filling cycles. This laminate plywood is still 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, the plywood is highly resistant to all kinds of environmental influences. This makes it possible to use this material in the construction of wear-resistant surfaces. It can be billboards, concrete reusable formwork, flooring, walls and wagons. If necessary, you can purchase a large format of laminated plywood. In this case, the product can be painted in different colors. This allows the material to be used in the production of children's playgrounds. Plywood glued (GOST must be observed in production) has anti-slip characteristics, which makes it possible to use it for the installation of the floors of boats and motor vehicles.

Positive features of laminated plywood

Multilayer plywood has high wear resistance, it can be quickly laid. Among other things, it can be easily processed. It perfectly tolerates aggressive environments, as well as all sorts of cleaning and cleaning products. On sale, you can find options for an embossed and smooth surface. The consumer has the opportunity to choose from a wide range of any color.

Description of brand ФСФ

Plywood glued from wood chips has several layers. They are glued together with special compounds. The variety can be determined by the number of knots per one square meter, as well as the degree of processing and the wood species. The less flaws on the surface, the higher the cost. It is important to pay attention to the density. The higher this is, the higher the quality. For example, beams made of plywood are produced. In general, this material has a wide field of use. It is used for the construction of temporary buildings, with the arrangement of roofs, fences, and also in the production of formwork. The latter will be inexpensive, but its quality will be on top. If it is a coniferous plywood, its surface is not polished and has a natural gumminess, which gives the products a quality of resistance to decay. Thanks to the use of resin glue, you can not be afraid of the fact that the plywood will be delaminated under the influence of rain, wind and sun. The quality-price ratio of this material is comparable.

Plywood brand FBS

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. The production is made from sheets of veneer, which is pre-peeled. The sheets are impregnated with bakelite varnish, made on an alcohol basis.

Conclusion

Furniture made of plywood is durable and durable. This material is widely used in many areas of construction and industry. He took his worthy niche in the market. Its quality does not remain an undervalued consumer.