Cork

A versatile material that is extracted from bark and has been used for thousands of years, still occupying a strong position as a high-tech material in the early part of the 20th century. Tree peel has been used in space shuttles because it protects the fuel tanks on re-entry into the Earth’s atmosphere – a result of 1cm of cork containing 40,000,000 cells of air.

 
 
  • The harvesting of cork takes place in the summer when the bark expands and naturally comes away from the inner layer of the tree.

  • Machine, routed, lathe-worked, cut using similar techniques to woodworking and can be formed using a process similar to compression-moulding plastics. It can be turned into a sheet, woven as a textile and even combined with other flecks of different types of cork to make composites. Also formed into placemats, dartboards, shoe liners, anti-vibration pads, handles for sporting goods, contemporary furniture, fabrics.

  • Rapidly renewable and biodegradable. Cork trees absorb 5x more C02 than other trees while producing a new harvest of cork bark every nine years. Each mature cork tree produces enough cork bark to make 4,000 bottle stoppers every nine years.

  • Good weight to strength ratio. Very lightweight, impermeable to liquids and gases, elastic, vibration/shock dampening and good thermal insulation properties.

    One of the few materials that has a Poisson ration of 0, which means that it does not get thinner when stretched, unlike most other springy materials.

    Water resistant. Cork trees can easily withstand fires. As a result, they are planted to act as fire barriers.

 
 
 
 

Resources

Lefteri, C. (2014). Materials for design. Laurence King.

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Fungus Based Materials

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Cotton