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Glass Fiber and Quartz Fiber filters are perhaps the most highly engineered fibrous filtration media available for research and industrial applications. Glass microfibers, the starting raw material, are entirely man-made. Since the ultimate retention characteristics of the filter paper are determined by the microfiber diameter, rigid manufacturing controls are imposed to produce consistent, controlled diameter fibers. Typical diameters range from 0.5 to 1.0 µm. Once compacted, these fibers form a dense, random fiber matrix. When used in aqueous filtration, high flow rates and high loading capacities are observed as particles are entrapped within the filter matrix. Chemical resistance, pH resistance and biological inertness are maximized since the fibers are borosilicate glass. Thermal resistance can be increased from 500 °C to 1000 °C by reinforcing the fiber within alumina binder. Glass fiber filters with binder are recommended for long duration filtrations under pressure. Glass fiber filters without binder are recommended for analytical and gravimetric determinations. Note: The retentionefficiency for different brands of glass fiber filters can't directly be compared. Please contact us fro clarification. Technical information