Binderless Glass Microfiber Filter Media, Grade D, pack/100

Glass microfiber filters offered in this product range are produced from 100% borosilicate glass microfiber without the use of binders or strengthening agents. These filters offer many advantages in a wide range of analytical applications and are sold in packs of 100.

The fibers used to manufacture these depth filters are smooth and uniform. This permits their characteristically high flow rates while allowing retention of exceptionally small particles and high load capacity. These characteristics are particularly important in applications involving high concentrations of particulate or gelatinous substances. In choosing the appropriate filter for a specific application, careful consideration should be given to the physical form and concentration of the material to be captured by the filter.

Depth filtration categorizes filter media that traps particulate within the random matrix of fibers found within the thickness of the media. The efficiency rating of the filter is characteristic of the complex void space structure that develops as the fibers overlap. The fibrous material within the filter is commonly glass microfiber, cellulose or polypropylene. In depth filters using glass microfiber, the purity of the filter is dictated by the presence of, if any, binder material that acts as a strengthening agent and aids in holding the fibers together. All of the media described on this page are 100% borosilicate glass and free of binders.

Because of the characteristically high flow rates of depth filters, they are generally used in applications such as single and multi process removal of sediment and coarse particulate. Glass microfiber filters without binders are an ideal medium to entrap sediment for further analysis and counting due to the inert matrix. Also, depth filtration media are commonly used for pre-filtration prior to surface filtration with substrates such as membranes.

Glass Microfiber Characteristics at a Glance

• Fastest flow rate
• High load capacity
• Retention of particles to sub-micron size
• Temperature range up to 500°C
• Use in liquid and gaseous filtration
• Inert fiber composition
• Free of binders or additives

Grade D Features

• Coarse porosity, fast flow rate, with a 2.7 µm size particle retention
• Well-suited for higher volume and repetitive laboratory filtering
• Ideally used as a general pre-filter to extend primary filter life
• Binderless borosilicate glass microfiber

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