How to measure the performance 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, namely membrane defects, membrane thickness, membrane apparent density and porosity. 1. Determination of membrane defects. The membrane defect refers to the existence of pores in the surface or deep layer of the membrane, which has a direct impact on the performance of the membrane, so the membrane with defects should be removed before use. Defective membranes can generally be inspected visually or with the aid of a microscope, and can also be measured by bubbling by immersing them in water (or in a non-solvent for the membrane). 2. Determination of film thickness. Generally, it is measured by a spiral micrometer or a thickness gauge, and it can also be measured visually under a microscope or an electron microscope. 3. Determination of film apparent density. Generally, the method of weighing is used to first weigh the quality of the film, and then calculate the volume according to the measured film thickness and inner and outer diameter data. The ratio of the two is regarded as the apparent density of the film. 4. Determination of porosity.

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