What materials are commonly used for filter cartridges of security filters?

Common Filter Cartridge Materials and Features of Security Filters

1. PP Melt-blown Filter Cartridge (Most commonly used, standard configuration)

Material: Made of polypropylene particles by melt-blowing molding.

Precision: 1μm, 5μm, 10μm, 20μm.

Features: Cost-effective, acid and alkali resistant, no secondary pollution, the first choice for pre-filtration of RO systems.

Application: Tap water, groundwater and pure water pretreatment; suitable for most conventional security filters.

2. Pleated Filter Cartridge

Material: Polypropylene / PES (Polyethersulfone) / Nylon N66.

Features: Large filtration area, high dirt holding capacity, high flux and higher filtration precision.

Application: High flow conditions, pharmaceutical, food, fine pure water and high-precision filtration scenarios.

3. String Wound Filter Cartridge (Honeycomb winding type)

Material: Polypropylene thread, cotton thread or glass fiber thread wound on a support skeleton.

Features: High temperature resistance, oil resistance and strong dirt holding capacity.

Application: Water containing slight oil, high-temperature water, industrial circulating water and wastewater pretreatment.

4. Sintered Filter Cartridge

Material: PE (Polyethylene), PTFE (Polytetrafluoroethylene).

Features: Reusable after repeated cleaning and regeneration, corrosion resistant and resistant to organic solvents.

Application: Corrosive chemical liquids and working conditions requiring repeated recycling.

5. Stainless Steel Sintered Filter Cartridge

Material: Sintered 304/316L stainless steel powder.

Features: Resistant to high temperature and high pressure, reusable after repeated cleaning, with extremely high structural strength.

Application: High-temperature steam, chemical industry and high-pressure working conditions; not suitable for ordinary pure water.