Common specifications for melt-blown filter cartridges encompass various parameters, including outer diameter, inner diameter, and length; furthermore, customization options are available. Standard outer diameters include φ60mm, φ65mm, and φ115mm; inner diameters include φ28mm and φ30mm; and lengths are available in 5-inch, 10-inch, 20-inch, 30-inch, 40-inch, 50-inch, and 60-inch increments. Filtration precision is available in a wide range of specifications-commonly 0.5μm, 1μm, 5μm, 10μm, 25μm, 50μm, 75μm, and 100μm-covering a comprehensive range from 0.5 to 150 microns.
The primary material used for melt-blown filter cartridges is polypropylene (PP); this material is utilized for the filter media, end caps, and central core alike. Operating conditions include a maximum operating temperature of 82°C and a maximum differential pressure of 2.0 Bar at 21°C; the cartridges are also capable of withstanding in-line steam sterilization at 126°C for 30 minutes. Performance testing protocols cover filtration performance, physical properties, and chemical properties. Filtration performance testing includes assessments of particulate filtration efficiency, bacterial filtration efficiency, viral filtration efficiency, pressure drop, and dirt-holding capacity. Physical property testing evaluates parameters such as basis weight, thickness, pore size, air permeability, and tensile strength. Chemical property testing encompasses analyses of material composition, extractables, and flame retardancy.
