Expanded Cork Isolation


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The corkboard material is a natural product (vegetal) originating from cork. The cells of the expanded cork contain 50% air, are waterproof and are expandable. The corkboard is not only a thermal, but also a phonic and vibratic insulator.

The cork granulates are placed in a pressure cooker, heated to a temperature of 300°C and without any contact with the air. The blocks are then removed and cooled. Afterwards, they are sawn to the dimensions required. After cleaning, the fibres are compressed into sheets.

Applications for the corkboard are insulation of walls, floors, ceilings, refrigerators, pipes, doors. It is also used against steaming condensation and structure and machine vibrations, as gaskets, for acoustic correction, etc.

Expanded cork boards are produced in dimensions 1000 x 500 mm thickness from 10 to 150 mm. In three different density’s. Different sizes of granulates in bags.

Sheets of 1250 x 625 mm, thickness from 10 to 40 mm.
Fabricated combinations with cork insulation 1000 x 500 x 40 mm.
Stripes 1250mm to 80 / 100 / 120 mm

Technical specifications:
Coefficient of thermal conductivity, average temperature 20°C 0,035 Kcal/m.h.C
Specific heat at 20°C 0,40 to 0,50 Kcal/kg°C
Fire resistance acourding DIN 4102 B2
Specific Heat 1,67 KJ/kg°C
Resistance to steam U5-30
Normal working temperatures -200°C to 110°C
Coefficient of thermal expansion at 20°C 25 to 50 – 10-6
Does not disintegrate in boiling water three hour test

Material Properties