Related Parameters and Common Sense of the Membrane
1. Absolute Aperture: Absolute Aperture Rating refers to the distinction between pore size by challenging bacteria that are 100% cut under very stringent test conditions to a specific size. The conditions that must be specified are: test organism (or molecular) size and concentration, test pressure and detection method.
2. Air Flux: A method of measuring the passage of air through a filter. That is the flow rate of air flowing under different pressures, different porosity and different filter areas.
3. Bubble Point: In the microporous filter industry, the specific pressure of the liquid in the pores of the filter membrane is used to infiltrate the filter membrane at a specific temperature and at a specific temperature.
4. Filter efficiency: The filter defines its filtration efficiency at its specific pressure with its total amount of filtration and particle size. In general, the lower the degree of obstruction and the lower the pressure, the greater the effectiveness of the filter.
5. Filter life: The maximum length of time the filter is used under certain operating conditions. It depends on many factors, such as the nature of the filter, the operating temperature, the choice of filter material, and so on.
6. Hydrophilicity: Hydrophilicity is defined as a hydrophilic, hydrophilic membrane usually with a special chemical layer that allows the membrane to be infiltrated with water; Hydrophobicity is a reference for the repulsive force of water. Hydrophobic filters rarely hydrate completely. In observation, it can be visually observed that the small water droplets stay on the surface of the filter membrane without being adsorbed by the surface and diffused into the water surface. The size of the hydrophobicity depends on the pore size of the filter material and the characteristics of the filter material.
7. Flow rate and flow rate: Flow rate is the total amount of filtrate passing through the filter per unit time at a specific temperature and pressure. The flow rate is closely related to the surface properties of the membrane. Flow rate and flux are two important parameters for filter media and design performance. This performance depends on the following aspects:
1) Viscosity: Viscosity determines the difficulty of liquid flow. The higher the viscosity of the liquid (under certain temperature and pressure conditions) the lower the flow rate.
2) Pressure difference: the pressure difference between the inlet and the outlet in the filtration. When the filter is fully loaded, the filtration pressure difference increases.
3) Porosity: refers to the ratio of the volume of all pores on the membrane to the volume of the entire membrane. Usually, the membrane has a pore area of 50-90%, and the flow rate is directly related to the porosity of the membrane.