Eurotec catalogue fastening technology Page 275
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Timber engineering 6 mm 12,5 mm © ah_fotobox – istockphoto.com 25 mm Properties of cork The cork bark has a honeycomb-shaped cell structure with over 40 million cells per cm³. The cells have a high proportion of an air-like gas mixture, which results in the cork’s low weight on the one hand and the high compression capacity and elasticity on the other. The cork can therefore be compressed by up to half its size and can return to its original shape after compression. Almost half of the cork bark is made up of suberin, a non-combustible biopolymer. The substance lines the individual cells and makes them impermeable to liquids and gases. The bark’s structure and thickness protect the cork oak from heat, drying out and infections. This natural protective insulation makes cork oak an ideal insulating and sealing material for technical purposes. Advantages • Very good sound and thermal insulation • Impermeable to liquids and gases • Good resistance to fire and high temperatures • High frictional resistance • Compressible and elastic • Good wear resistance • Low weight – floats on water • Hypoallergenic and anti-static – does not absorb dust • High flexibility – comfortable and soft 275
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