Evaluation of pore distribution in non-woven fabric sheets

Our company conducts specific surface area measurements of powdered zeolite using the BET method. In addition to powdered zeolite, it can also be used for specific surface area measurements of catalysts and activated carbon, and by utilizing other applications, it is possible to measure not only specific surface area but also pore distribution. Furthermore, particle size and pore distribution can be evaluated using methods and equipment other than those mentioned. For more details, please refer to our catalog.

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This is an example of evaluating the maximum pore diameter and pore size distribution of a non-woven fabric sheet using the bubble point method. The sample is immersed in a chemical solution, and air pressure is applied. The pressure is increased until it overcomes the surface tension of the chemical solution absorbed in the sheet, resulting in the appearance of bubbles; this pressure is referred to as the bubble point. The maximum pore diameter can be calculated based on the bubble point pressure and the surface tension of the chemical solution.