How to determine PP folded filter microfiltration membrane performance?

PP folded filter to determine the performance of microfiltration membrane, determine the way mainly from four aspects, respectively is film defects, film thickness, film apparent density and porosity.

1, the determination of film defects.

film defects is refers to the membrane surface or deep cavity, its existence directly influence on the performance of the membrane, so before using flawed film should be removed.

defective membrane generally available visual or with the aid of microscope examination, can also through the submerged ( Or membrane solvents) Through the determination of bubbling.

2, the determination of film thickness.

generally USES spiral micrometer gauge or thickness gauge measurement, can also be visual under microscope or electronic microscope.

3, the determination of apparent density.

said first generally adopt the method of weighing the quality of the film, and then based on the measured data to calculate volume, film thickness and inner diameter ratio of the two that is the apparent density of membrane.

4, the determination of porosity.