What Is Plwood?
Plywood known as board and thin core board. It is one of the earliest artificial boards used in the decoration industry. Plywood is a slab that is and staggered in the direction of wood grain after glue. They pressed to each other without heating. The classification of plywood based on the thickness of the plywood. It is generally divided into 3 PCT, 5 PCT, 9 PCT, 12 PCT, 15 PCT and 18 PCT. Six specifications.
Performance Category, Panel Thickness. and Span Ratings are key categories that need to considered together.
US PS 1 specifies thickness tolerances and Performance Categories for plywood grades. and requires a thickness label in 1000ths of an inch. We have listed the minimum and maximum allowable panel thickness. and recommended thickness label for each relevant Performance Category.
The timber trade have been vocal. about their concerns over their ability to source marine plywood. that meets the BS1088 standard. that a marine product that does meet the standard. will be too costly for the applications that the product required for.
The H Range Performance Plywood is a reliable alternative to Marine Plywood. offering full classification and performance in all conditions. Performance Plywood is generally used in the construction industry. and all other uses that need compliance with exterior classification standards.
Glue bond: EN314-2 Class 3 (Exterior)
Formaldehyde release: 0.21-0.23 mg/m2h - Class E1 (Tested to EN 717-2)
Moisture content: 10% (±2)
Veneers: High Quality Face and Core
European Timber Regulation (EUTR) status: Compliant
CE Marked: BS EN 13986
Chain of Custody: FSC® Certified – FSC 100%
Performance Plywood tested and certified to meet EN 636 Service Class 3. making it suitable for use in structural components in exterior conditions.
Plywood advantages and disadvantages:
1. In the process of making plywood, no sawdust generated, and the log resources can used. which improves the use rate of natural wood and is an important way to save wood.
2. The plywood has light bulk density, good bending resistance, convenient transportation. and construction, and beautiful texture. which makes up for some natural defects of wood and has good decoration. In some structural parts that need load bearing, the use of a thin core plate will be more intense.
3. The boiled plywood has strong weather resistance, high temperature resistance and durability. It can used in airplanes, ships, trains, cars, home improvement. construction and containers where it is necessary to use panels.
4.The surface of the plywood is free of MDF and solid wood panels. It is not suitable for single-sided parts, such as cabinet facades and window sashes.
5. Without dried plywood. there may be problems such as unqualified quality and production process. which will cause serious deformation of the sheet during use. and it is difficult to adjust the external force.
6. There is also a kind of plywood, which uses a board as a base layer. and a decorative material such as a fireproof board. or an aluminum-plastic board attached to the surface thereof. This type of plywood structure is not as strong as an ordinary density board.
Today, plywood is an industrial material manufactured using a controlled technological process. It known to have been in use since the antiquity. Indeed, the first evidence of thin sheets of wood bonded together dates back3,000 years. to Ancient Egypt. Ancient Rome also exploited the virtues of one of plywood’s forerunners. which used to manufacture shields.
A few thousand years later, in 1881, Fitzland L. Wilson filed a patent in the United States for a new machine. the veneer lathe was born. It would go on to rationalise timber peeling and intensify the production of thin sheets of wood. But the real turning point occurred a few years later, in 1884.
A further patent filed in the United Kingdom by Witkowski. relating to the use of casein glue to bond sheets of wood together with the grains of adjacent layers. arranged at right angles to one another. This invention paved the way for the manufacture of large industrial panels.
Between the end of the 19th century and the start of the 20th century, plywood began to make its mark in Russia. Finland and Central Europe. Why? Because these countries blessed with vast quantities of easy-to-peel wood, such as spruce. and birch.
In France, the industry’s development began very early in the 20th century with the peeling of poplar. which used for packaging. The sector took off a few years later with the arrival of another tree species: the okoume.
Plywood began to take off in France during the second world war. this lightweight and stable material raised a great deal of interest. in the aeronautical sector for the construction of plane. Why? Because plywood boasts excellent mechanical properties without adding weight to aeroplanes.
Having gained experience in the peeling process (with poplar), manufacturers improved. their industrial facilities to achieve ever greater performance. Meanwhile, their resources diversified with the cultivation of a particularly strong. and lightweight tree species. the okoume.
A technology transfer enabled the peeling process to applied to this exotic species. allowing the plywood industry to conquer new markets, exterior applications in particular. Constant advances in glue technologies. innovations in the manufacturing process and continuous improvements to industrial facilities. allowed for greater diversification. leading to an ever wider range of plywoods with a multitude of uses.
Today, plywood has made its mark as an effective, reliable and versatile material. It can as found in building structures. in home interiors. in crates used for the transportation of parts and industrial products. and in boat furnishings.It has countless applications.
Plywood VS OSB
Plywood and OSB (oriented strand board) structural panels. are durable and manufactured to resist uniform loads perpendicular. to their surfaces as well as high loads parallel to their surfaces. Different panel types and grades resist impact loads to different degrees. Moisture and sunlight can affect the long-term performance of all wood products. and APA recommends that untreated. or unprotected structural wood panels have limited. or controlled exposure to either high moisture levels. or direct sunlight.
While many wood structural panels. have significant exposure to moisture over their service life. those periods limited in time. and followed by opportunities. for the wood fiber to dry to moisture content levels below 20 percent. The service life of wood structural panels can be long term. if temperatures are below 230° F. exposure to moisture and direct sunlight minimized. and loads are within design levels. See APA Technical Topic Service Life of Oriented Strand Board, Form TT-052. for more information.
Crane with plywood binPlywood. and OSB structural panels have varying degrees of impact resistance. based on the panel construction. Plywood improves on wood's well-known ability to absorb shock. Its cross-laminated construction helps to distribute impact loads. and makes it split resistant. Plywood holds up well to sharp blows, fork tine impact and other in-service abuses. which in turn means lower replacement costs.
Surfaces of plywood panels with thicker face veneer. or more solid veneers next to the face. such as found in Underlayment grade panels . are more able to withstand surface impacts. See the Surface Durability section of the web site. or APA publication Data File: Selection, Installation. and Preparation of Plywood Underlayment, Form L335, for more information.
Plywood and OSB structural panels have varying degrees of resistance to wear. Other considerations for wear resistance. are the species of wood in the surface layer. the construction of the panel. and the finish or overlay on the panel's surface. See the Surface Durability section of the web site. or APA publications Caster Loadings. on Plywood, or Materials Handling. for more information
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