Performance measurement method of PP pleated filter element microfiltration membrane

The performance of the PP pleated filter element microfiltration membrane needs to be measured. The measurement method mainly starts from four aspects, which are membrane defects, membrane thickness, membrane apparent density and porosity. 1. Determination of membrane defects. Film defect refers to the existence of holes in the surface or deep layer of the film, and their existence has a direct impact on the performance of the film. Therefore, the defective film should be removed before use. Defective membranes can generally be inspected visually or with the aid of a microscope, and can also be determined by bubbling by immersing them in water (or in the non-solvent of the membrane). 2. Measurement of film thickness. Generally, a spiral micrometer or thickness gauge is used for measurement, and it can also be measured visually under a microscope or electron microscope. 3. Determination of apparent density of film. Generally, a weighing method is used to first weigh the mass of the film, and then calculate the volume based on the measured film thickness and inner and outer diameter data. The ratio of the two is considered to be the apparent density of the film. 4. Determination of porosity.

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