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2. Plywood
Plywood is made by laminating several cross-laminated plies of veneer.
There are several grades of plywood, depending on the binders used, which give them greater or lesser resistance to water, depending on whether they are used indoors or outdoors.
2.1 Plywood panels for interior use
There are two types of panel for indoor use.
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Type 1 panels
They are resistant to immersion in cold water at 20°C for 24 hours. These panels are of standard quality and intended for interior use without the risk of humidification. They are laminated with ordinary, inexpensive urea-formaldehyde resins (€0.30/kg), which can be filled with wheat flour or walnut shells, for example....
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Plywood
MDF panels (Medium density fiberboard)
Standardization
French Standards Association (AFNOR)
http://www.afnor.org
- Wood-based panels – Determination of formaldehyde content – Extraction method, also known as the perforator method. - NF EN 120 - 10-92
- Classification des colles thermoplastiques pour bois à usages non structuraux. - NF EN 204 - 04-02
- Thin, long and oriented strand board (OSB) – Definitions, classification and requirements....
Manufacturers
(non-exhaustive list)
Machine manufacturers
Siempelkamp (Germany) http://www.siempelkamp.com
Dieffenbacher (Germany) http://www.dieffenbacher.de
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