COMPOSITION OF CORK
The tannins in cork can improve the taste of red wine and soften blood vessels. The interior of cork consists of many radially arranged flat cells filled with air, with more than 50 million cells per cubic centimeter. Therefore, cork is often colored, soft in texture, elastic, impermeable, not easily affected by chemicals, and is a poor conductor of electricity, heat and sound.
We always believe in sustainable development. Making products with natural cork as a raw material engenders our respect for nature, thus making it clearer that proper and effective management is necessary.
100% natural, renewable and recyclable cork is one of the most versatile materials in the world from an environmental, social or economic point of view. The bark of the cork is harvested every 9 years after it has matured (about 25 years).
Its characteristics are particularly outstanding - natural waterproof, airtight, elastic, compressible, highly resistant, light weight, water buoyant, thermal insulation, sound insulation, flame retardant, it is an excellent raw material and is worth the first choice. Whether artificial or natural, no material has the properties to cover such breadth and depth as cork.
Chemical composition of cork
Cork composition varies depending on geographic origin, climate and soil conditions, genetic origin, tree dimensions, age (virgin or reproduction), and growth conditions. However, in general, cork is composed by suberin, lignin, polysaccharides, extractables and others.
• suberin (45%) - main component of the cell walls, responsible for the elasticity of the cork;
• lignin (27%) - insulating compound;
• polysaccharides (12%) - components of the cell walls that help define the texture of the cork;
• tannins (6%) - polyphenolic compounds responsible for the colour;
• seroids (5%) - hydrophobic compounds that guarantee the impermeability of the cork.