Cork is the bark of an oak tree known botanically as QUERCUS SUBER. It is an evergreen which grows in commercial stands only in areas bordering the Mediterranean Sea. Of the important cork producing countries, Portugal supplies approximately 50%, Spain 25%, with the balance being divided between Algeria, France, Morocco, Italy and Tunisia. As early […]
Benefits of Cork
What Are the Benefits of Using Cork Material for Flooring?
Cork is a natural product with remarkably unique qualities unmatched by any other material. Cork is superior because it is:
- Quiet & Acoustic
- Warm & Insulating
- Soft & Comfortable
- Environmentally Friendly
- Hypoallergenic & Anti-Fungal
These are the key benefits cork is famous for, and what puts it in a category all its own. But what makes cork so remarkable? The unique physical properties listed below are what gives cork its natural advantages!
Unique Physical Properties of Cork
These physical properties provide cork all its famous advantages:
More than 50 % of the cell volume of cork consists of air. It is one of the lightest solid substances, with a specific gravity of .25.
ABILITY TO ABSORB VIBRATION
Every cubic inch of cork has more than 200 million completely enclosed air cells, each measuring 1/1000″ in diameter. These minute cells have 14 sides, virtually eliminating empty spaces between the cells. Since 50% of cork is filled with air, it essentially acts as an “air cushion”, absorbing vibrations and direct impacts. This makes it an excellent acoustic and soundproofing material for floors, walls and ceilings.
LOW THERMAL CONDUCTIVITY
Next to a vacuum, “dead” air space is one of the most efficient non-conductors of heat. Thanks to the cell construction of 200 million completely enclosed air cells mentioned above, cork has this property inherently.
A cubic inch of cork can withstand up to 14,000 lbs of pressure per square inch without breaking, and retain 90% of its original form after the pressure is released. Cork returns to 97% to 100% of its original form after a more typical pressure is released.
Heavy pressure does not break down the tiny air cells in cork. On the contrary, compressed air within the cells spring back when the pressure is removed. A roll or sheet of composition cork can be compressed in one direction without losing its dimensions in the other direction, which is critical for many applications.
Thanks to its compressibility and resiliency, cork displays a high degree of stability under varying conditions. This is paramount to its continual usage and success throughout the world today. Cork is a tough, durable substance with a remarkable capacity for retaining its initial properties.
RESISTANCE TO MOISTURE AND LIQUID PENETRATION
The cellular structure of cork makes it a highly resistant to liquid penetration. While not completely impervious to moisture, it can be made waterproof with the addition of a proper binder.
The natural form and composition of cork make it a highly frictional material. Even when wet or coated with oil or grease, cork retains this quality, outperforming leather, rubber, and many other products used for frictional or non-skid purposes.