High Silica Fabric

High Silica fabric is used to produce nettings, mats, tapes and chopped strand.Valmieraa s High silica glass nettings are used as a filtering material in metallurgy and in aerospace, marine, and molten metal, power and other industries as well. The characteristics of Valmieraa s High Silica fabric are defined by the Low Smoke Emission, High Melting Point, Drapability, Water repellence, versatility and fireproof. It is therefore important to understand the alternate technologies adapted for production of High Silica fabric in the international market. E- Glass fabric is generally leached with an acid to burn off all the impurities to obtain High Silica fabric. Valmiera uses a special E- Glass fabric with over 76% Silica & Aluminum Oxide (Al2O3) - 3.5 +/- 0.5% in it for the production of High Silica fabric. A soft acid is used to leach the fabric. The leeching is also done to obtain just about 95-96% Silica content in the fabric. The Aluminum Oxide has higher melting temperature 2050A C and is a very soft and ductile metal. This enhances the temperature resistance of the fabric itself and also renders the fabric, a very soft one (absolutely no brittleness). The temperature resistance of High Silica fabric is therefore 1250A C minimum. The minimal leaching done on the High Silica fabric using a a softa acid results in high tensile strength of the fabric. The value of the tensile strength is almost double higher to compare with the conventional 99% silica fabric.