Nonwoven Fabric Filters are filtration devices that use nonwoven fabric as the filtering medium, widely applied in air purification, liquid filtration, and other fields. The main components of a nonwoven fabric filter include a nonwoven filter bag and a supporting frame. Nonwoven fabric (made from synthetic fibers like polypropylene [PP] or polyester [PET], or natural fibers through processes such as heat bonding, needle punching, or melt-blowing) offers advantages like high filtration efficiency, excellent breathability, lightweight flexibility, and cost-effectiveness.
Structure of Nonwoven Fabric Filters
Nonwoven fabric consists of randomly distributed fibers interconnected through physical or chemical methods, forming a multi-layered, multi-pore-sized mesh structure.
Common Applications of Nonwoven Fabric Filters
1. Household Applications
Air purifier filter cores (pre-filter layer traps hair and dust).
Air conditioner filters, vacuum cleaner dust bags.
Face masks (melt-blown nonwoven fabric for PM2.5 or virus protection).
2. Industrial Applications
Water treatment (filters sediment and suspended particles).
Automotive filters (oil filters, air filters).
Food and beverage industry (liquid pre-filtration).
3. Medical Applications
Surgical gowns and medical dressings (blocks bodily fluids and bacteria).
Plasma bags, medicinal liquid filtration.
Advantages of Nonwoven Fabric Filters
Cost-effective and easy to mass-produce.
Lightweight and flexible, adaptable to complex shapes.
Can be combined with other materials (e.g., activated carbon) to enhance functionality.
Limitations of Nonwoven Fabric Filters
Limited filtration precision (typically suitable for coarse to medium filtration).
Poor heat resistance (most materials operate below 80°C).
Prone to clogging over time, requiring regular replacement.
