Oaks are distributed in many parts of the world, but their bark can only be used as cork under certain geographical conditions-Mediterranean climate. Portugal is called the country on the oak tree, and the oak resources in Portugal have been fully utilized. An oak tree can only be peeled after 25 years old, once every 9 years, and a tree can be peeled 15- 16 times in its life. Of course, this requires a prerequisite, that is, after the bark of the oak tree is peeled off, the tree itself will not be affected, and after a period of time, that is, nine years, it will return to its original appearance. The excellent physical properties of cork are the fundamental reason why cork is widely used. Observing the cross section of cork under a microscope, we can find that the interior of cork is covered with many honeycomb structures, and the interior of honeycomb is full of air, so cork has good elasticity. Cork itself is very wear-resistant, and now many cylinder pads of engines in various countries are made of cork. In addition, cork is moisture-proof and moth-proof, which can ensure that wine will not pass away with the years in a dark and humid wine cellar. This pure natural material has no harm to human body, so 100 has been widely used in the production of wine and champagne corks for more than years. Later, the Portuguese developed cork wallboard and flooring products with cork.

Beijing Capital Library, built in 1932, used the simplest cork floor with a thickness of 1 cm at that time. It was used for 70 years and was not restored until 2000. When the library was renovated in 2000, the cork floor was still used as the ground material of the reading room. Amerling Group, the largest cork producer in Portugal, has provided it with more than 600 square meters of cork flooring products. With the improvement of living standards, people's demand for environmental protection products is increasing. Cork floor is a natural material, which does not damage the environment, has strong sound absorption, heat insulation and compression resistance, is moth-proof and moisture-proof, and is easy to clean and maintain. At the same time, the unique patterns and colors of cork are elegant and beautiful, which is suitable for floor materials.

Europeans have used cork floors and wallboard for a long time. Cork, as a high-grade flooring material, currently accounts for about 5% of the flooring material in Europe.