Interesting about plywood : the most unusual and little-known facts
The oldest thing in the world, which is made of a material that looks like plywood, is currently considered the one found by archaeologists in Egypt - a box. The age of the product is large, because the manufacture dates back to the 15th century BC.
The material of manufacture is cedar, which is inlaid with thin plates of ebony. In ancient Egypt, wood was exclusively imported, so its cost was incredibly high.
But black and mahogany were especially valued.
This explains that such a laborious one was chosen for the manufacture of the casket, but it makes it possible to save the use of wood mass.
Plain plywood (in the form we are accustomed to) appeared much later. But at that time, to save wood in conditions of material shortage, much later the Romans and Greeks used methods that resemble veneering. Usually plywood was used for the manufacture of furniture and various household items.
A little later, individual veneer elements, which were called veneers, began to be used for decorative purposes.
In the Ancient World, Ancient Egypt, and even in medieval Europe, plywood was made by hand. Various natural adhesives were used as a binder type for bonding veneer or veneer layers, and as a rule, they were made on the basis of natural resins.
The industrial production of such material as plywood using special machines did not develop until the 18th century, when the Englishman S. Bentham began to develop and patent several machines that were intended for veneering solid wood and for subsequent gluing layers of veneer.
Plywood that was industrially made , was much cheaper than what they did with their own hands, and in terms of quality it turned out even better, and therefore quickly enough was able to completely displace hand-made products from circulation.
At the same time, the quality of cheaper plywood furniture has increased.
At the same time, such a piece of furniture has become more affordable. There are several types of plywood that can be seen in the photo, but film faced plywood is in great demand and interesting, since due to the fact that it is contained in FSF and is covered with a film layer that gives greater resistance to moisture and strength, such excellent results are achieved. It is film faced plywood that is used in difficult working conditions - at high temperatures and high levels of humidity.
The world's first and uniform standard for plywood sheet size was 1.
2 * 2. 4 meters, and it was accepted in 1928. As for the thickness, there is still no single standard, almost 100 years later - every large manufacturer tries to produce plywood according to its own sheet thickness range.For this reason, on sale you can find plywood sheets of various thicknesses ranging from 6 to 76 mm
On the territory of great and mighty Russia, plywood began to be produced at the beginning of the 19th century, and talin became the center of its production. D.
M. Luther (who is German by nationality), was the owner of the Tallinn pencil manufactory "Luther and K", decided to pay attention to the peculiarities of the technology for turning a pencil case and decided to try a similar method to cut veneer from a thick log, and then glued the sheets, and thus got plywood.
The experiment turned out to be even more than successful, and in 1819 he received the patent needed for production. But for some reason, plywood was not popular on the Russian market until the end of the 19th century, and then the heir to the inventor of plywood in the Russian way used plywood as a material for creating the bottom of Viennese chairs, which were supplied in huge quantities to Moscow and St. Petersburg.
The demand for such chairs was so great that Luther needed an urgent expansion of production, including for plywood, and the material itself became so popular that other Russian furniture manufacturers began to pay attention to it. not only them. Interestingly from the facts about plywood, the beginning of the "boom" in this material was facilitated by another invention, which Luther also invented and introduced.
One of the laboratory employees in this company managed to obtain for the first time (and, of course, to patent) a waterproof adhesive composition. After it was introduced into plywood production, the FSF grade appeared, which became very popular in many industries.
And the manufactory "Luther and Co" gradually became an incredibly large Tallinn furniture and plywood factory.
Manufacturers try to pack plywood sheets in piles that form packages, and pull everything with a strong rope. The material should be stored strictly horizontally on special pallets.
The number of sheets in such a package can be different, and it will depend on the thickness of the sheets in the package, as well as on other factors. In the storage room for plywood, certain conditions must be met, namely that the air humidity should be no more than 80%, the temperature range, which is allowed from -40 to +50 degrees.
Plywood must be protected from the effects of atmospheric precipitation, and also from direct sunlight.
In addition, there must be ventilation. If all the conditions listed above are met, plywood can be stored without losing its characteristics at any time.
Interestingly, plywood, which is a component of furniture, was actually used for more than just this. During the Second World War, it was used in aviation, and was made of the material for the skin, as well as the fuselage of aircraft.
And during the lack of materials, such building material successfully played the role of fuel tanks.
In Soviet times, plywood was a material for the manufacture of pipelines, which is needed to transport hydrocarbons. At the moment, the material is even used for the skin of sailing and motor yachts. This makes the ships lightweight and gives excellent technical performance. Another building material is used to create hockey sticks, and it is also a self-lubricating material for bushings and bearing shells, sometimes parts and machine elements.
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