Tego film is a dry adhesive film used to create waterproof plywood. The original Tego film was a German-made adhesive infused with phenolic resins, used to create strong and waterproof plywood sheets. Today, plywood made with modern versions of this film is used worldwide in various applications.
Tego film is a type of adhesive used to laminate layers of wood in the process of creating waterproof plywood. It was invented and first used in Germany in the 1930s and for a time the term was used to refer specifically to this product. Over the decades since its introduction, however, the term has been used more loosely to refer to any type of dry adhesive film used in this way.
The original Tego film specifically referred to a type of adhesive made in Germany which was developed for the production of plywood intended for use in aircraft construction, as conventional adhesives produced a product unsuitable for this purpose. It consisted of a sheet of paper infused with phenolic resins. The product was unique and only produced by a German company, Goldmand AG. The only factory that produced Tego’s original film was destroyed in World War II.
Since a sheet of plywood consists of many layers of veneer, many alternating layers of Tego film and wood veneers were stacked together. The pile was then heated and pressed, which bonded the adhesive and wood veneer layers together, resulting in a strong, waterproof plywood sheet. Unlike other adhesives used to make plywood, this adhesive was used in dry rather than liquid form, giving the constructed plywood an advantage in strength, overall structural integrity, and water resistance over other types of plywood.
As of 2011, plywood manufactured for use in conditions requiring water resistance are often constructed using Tego film. This does not refer to the original Tego film but to any one of a family of dry film adhesives that use phenolic resins as a base. Plywood constructed in this way is often referred to as Tego Film Plywood. The term Tego film itself is becoming somewhat archaic and less common as time goes on, but continues to be used colloquially in many parts of the world and even by some manufacturers in product descriptions and trade literature.
Plywood made using modern versions of this film is produced all over the world, much of it sourced from Southeast Asia and Indonesia. This type of plywood is used in a variety of ways, both in interior and exterior applications. Plywood made with phenolic resins is found in building construction, vehicle interiors, tool handles, and many other applications where strength and water resistance are critical.
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