People always know that glass fiber filter membranes are for depth filtration and have a capillary fiber structure that absorbs more water than the same cellulose membrane. Today will introduce more information about this membrane: sizes and main usage, etc.

glass fiber filter membrane

Definition of glass fiber filter membrane:

  • The membranes are made from 100% borosilicate glass fibers and include binder-free, chemically inert, and binder types.
  • And because of made of alkaline fiberglass, the filter is chemically inert and is a binder-free depth filter.


Scanning Electron Microscope Picture of Glass Fiber Membrane Filter

  • Pore ​​sizes: 0.45μm, 1.0μm, 1.6μm;
  • Bubble Point: ≥0.17MPa(0.45μm)
  • Flow Rate @23°C, H2O: ≥181mL/min/cm2@1 bar(0.45μm)
  • Width(Roll):> 270mm
  • Diameter: 13mm, 25mm, 47mm, 50mm, etc.

Feature of glass fiber filter membranes:

glass fiber filter membrane

  • In order to avoid chemical reactions with the material being filtered, glass with an inorganic binder is used when filtering organic matter.
  • The purpose of adding a binder is to enhance the mechanical strength of the glass fiber membrane.
  • Mainly for filtering coarse particles (such as macromolecular substances, and dust).
  • For a fiber membrane filter, choose a glass fiber membrane with an organic binder when filtering inorganic matter.
  • This membrane has the characteristics of a fast flow rate, large load capacity, and extremely fine particle retention, which can reach the range of submicron particles.
  • The glass fiber membrane can withstand a high temperature of 500 ℃ and can be used for specific gravity analysis and high-temperature gas filtration that needs to be ignited.
  • Small resistance, high filtering effect, can withstand the high temperature of 555°C, and for daily air pollution monitoring.
  • And made of 100% fiberglass and has the characteristics of a high flow rate, strong dirt-holding capacity, and the ability to filter fine particles.
  • Compared with other fiber materials and synthetic materials, glass fiber filter membranes have higher filtration efficiency and stronger dirt-holding capacity.
  • Made of fiberglass without binder;
  • And with high-temperature resistance: can withstand the high temperature of 500 ℃.
  • Under the same particle retention conditions, the overall filtration speed is faster than cellulose.
  • In addition, with a thick filter membrane, and strong carrying capacity.
  • And with a higher fine particle retention rate, faster flow rate, and higher load capacity.

Glass fiber filter membranes are mainly used for:

glass fiber filter membrane_home-img

  • Mainly used as a filter layer directly added to the filter membrane.
  • And glass fiber membranes are available for spot analysis and liquid scintillation counting.
  • And made fully transparent, which is convenient for subsequent microscopic examination.
  • For membrane pre-filtration to prevent membrane clogging;
  • Air pollution monitoring and special monitoring of solid pollutants, microorganisms, oil, acid mist, etc. in the air
  • The large specific surface area makes the glass fiber filter paper have excellent retention capacity;
  • Reduce filtration costs when filtering difficult-to-filter substances or highly contaminated solutions.
  • And belongs to the depth filter, and its main use is as a filter layer, which is directly added to the filter membrane.
  • The fibrous, non-clogging properties of glass fiber membranes provide excellent prefiltration for a range of filtration workflows, from basic liquid filtration to highly specialized gas and air filtration.
  • And for use as a direct filter for the clarification of buffers, reagents, and protein solutions
  • As well as for gravimetric analysis, air monitoring, and wastewater analysis.

According to diameter to use:

  • Filters of different specifications have specific requirements for the diameter of the pre-filter membrane.
  • If the diameter is too large, its lip can protrude below the seal, causing fluid to leak.
  • When filtering viscous and difficult-to-filter liquids, such as serum, etc, use multi-layer filtration, and 2-3 layers of filter membranes with different pore sizes are stacked together and use a polyester separation layer membrane filter.