Various Filter Bag Usage Environment

The filter bags are primarily constructed from materials such as polypropylene (PP), polyethylene (PE), nylon, polytetrafluoroethylene (PTFE), and stainless steel (grades 304 and 316).   These materials exhibit varying levels of thermal resistance and chemical compatibility.

PP filter bagsdemonstrate excellent chemical resistance, being resistant to acids, alkalis, and most organic solvents such as alcohols and aldehydes.   However, they are not resistant to strong oxidizing agents like concentrated sulfuric acid and nitric acid.   Their thermal resistance typically ranges from -10°C to 80°C, with short-term tolerance up to 90°C.

PE filter bags offer chemical resistance comparable to PP filter bags and exhibit greater stability when exposed to certain hydrocarbon solvents.   Their thermal resistance ranges from -40°C to 80°C, providing better low-temperature performance than PP.

Nylon filter bags are resistant to weak acids, weak alkalis, and oils but are not suitable for use with strong acids such as hydrochloric acid or phenolic compounds.   They can withstand temperatures ranging from -40°C to 120°C and maintain good mechanical strength at elevated temperatures.

PTFE filter bagsare highly resistant to virtually all strong acids (including aqua regia), strong alkalis, organic solvents, and oxidizing agents.   Their thermal resistance spans from -200°C to 260°C, which represents the widest operational temperature range in the industry.

Stainless steel filter bags offer a permanent solution with zero consumable costs.   They are capable of withstanding high-temperature steam sterilization and maintain a structurally stable design without the risk of collapse.   These bags can endure temperatures up to 500°C and exhibit exceptional resistance to pressure and wear.

Liquid filter bags are typically manufactured using sewing or hot melt techniques, ensuring structural integrity and reliable sealing performance.   A variety of ring mouth configurations are available, and customization.