Views: 215 Author: Site Editor Publish Time: 2025-09-29 Origin: Site
Accurately determining pore performance is the absolute prerequisite for ensuring actual application results. LOONG Filtration rejects any ambiguity or compromise in performance. We have established the industry's most stringent pore performance testing system as the core quality control link in our microporous membrane production. From the extremely standardized operations during membrane sampling (mandatory use of flat stamp tweezers and wearing pure cotton gloves throughout to prevent compaction, contamination, or physical damage) to multi-dimensional precision instrument testing, we ensure that the actual performance of every membrane perfectly aligns with its nominal parameters, providing you with "medical-grade" safety and "industrial-grade" precision.
Bubble Point Pressure Testing (Locking Maximum Pore Size): Bubble point pressure is the key parameter for obtaining the maximum pore size of a membrane. By allowing gas to penetrate micropores fully wetted with liquid (distilled water for hydrophilic membranes, absolute ethanol for hydrophobic membranes), we accurately record the critical gas pressure when the first continuous bubble is generated. This data directly determines the absolute retention capability and integrity of the membrane.
Mean Pore Size and Pore Size Distribution Testing (Ensuring Uniformity): Discarding the mercury intrusion method, which easily causes membrane deformation under high pressure, we primarily adopt the more scientific Mean Flow Pore (MFP) method and PMI (Capillary Flow Porometry). By measuring the flow rate change curve of dry and wet membranes under gradually increasing pressure in a low surface tension test liquid, we accurately analyze the proportion of different pore size intervals, ensuring a highly uniform pore size of the membrane.
Dual Porosity Testing (The Core of Permeability): Porosity is the core parameter characterizing membrane permeability and dirt-holding capacity. We combine the Mean Flow Pore method (calculating pore volume via gas permeation flow rate) with the Gravimetric method (calculating via precise weight difference between dry and wet membranes) for dual rigorous validation, ensuring the membrane possesses exceptional internal flow space while maintaining high precision.
Absolute Retention Reliability: Extremely precise bubble point testing ensures the maximum pore size of the membrane is strictly controlled, completely eliminating any penetration of out-of-spec particles or microorganisms, and rigorously safeguarding the quality baseline of high-purity products.
Perfect "Precision-Throughput" Balance: Scientific pore size distribution and high porosity testing enable the membrane to provide extremely low flow resistance and a longer service life while ensuring efficient retention, effectively reducing overall operating costs.
Biopharmaceutical Sterile Filtration: Extremely precise bubble points and uniform pore sizes are the lifeline of sterility assurance, perfectly handling the high-requirement terminal sterile filtration of APIs, vaccines, and culture media.
Food and Beverage Clarification and Purification: High porosity and scientific distribution can efficiently retain spoilage bacteria and fine impurities while guaranteeing large-flow operations, fully preserving the flavor compounds of the product.
High-End Environmental Protection and Fine Water Treatment: Accurate retention precision brings excellent dirt-holding capacity and throughput stability, assisting high-standard water quality monitoring and refined wastewater treatment processes.
