Filter foam is a three-dimensional mesh porous material made by foaming process with polyurethane (PU), rubber or other polymer materials as the matrix. Its core features include:
High porosity (70%~95%): The pores are interconnected, forming filtering channels.
Adjustable aperture: customizable from coarse filtration (PPI 10-30) to fine filtration (PPI 80-100).
Elasticity and pressure resistance: Restoring to its original state after compression, suitable for dynamic filtering scenarios.
Filter foam can be classified according to material, pore size and application:
1.Material
Polyurethane (PU) sponge:
Features: High porosity, good elasticity and water absorption, suitable for various filtration scenarios.
Application: Widely used in water treatment, air purification, industrial filtration, etc.
Polyester (PET) sponge:
Features: Oil resistant, water-resistant, wear-resistant, corrosion-resistant, high mechanical strength.
Application: Suitable for filtration systems in water treatment, oil filtration, and industrial equipment.
Polypropylene (PP) sponge:
Features: Resistant to aging and chemicals, lightweight and waterproof.
Application: Commonly used in water treatment, air purification, automotive air conditioning filters, etc.
Activated carbon sponge:
Characteristics: It has adsorption performance and can adsorb organic matter, odors, and harmful substances.
Application: Used for air purification, water quality purification, industrial waste gas treatment, etc.
2.Aperture size
Coarse pore sponge: With a larger pore size, it is suitable for intercepting large particles of impurities such as dust, sand, etc.
Fine pore sponge: With a small pore size, it is suitable for intercepting small particles and microorganisms such as bacteria, viruses, etc.
3.Application
Water treatment sponge: used to filter impurities and microorganisms in water and improve water quality.
Air purification sponge: used to filter dust, particulate matter, and harmful gases in the air.
Industrial filtration sponge: used to filter impurities in industrial liquids and gases, protect equipment, and improve product quality.
Most common applications:
- Water treatment
Household and commercial water: used for pre filtration to remove large particulate impurities from water and protect subsequent filtration systems.
Industrial water: used for cooling water systems and circulating water systems to prevent equipment blockage and corrosion.
Wastewater treatment: used in the pretreatment stage to remove suspended solids and large particulate impurities from wastewater.
- Air Purification
Air conditioning system: used for air conditioning filters to remove dust, pollen, and particulate matter from the air.
Air purifier: used to remove harmful gases and microorganisms from the air and improve air quality.
Industrial ventilation system: used to filter particulate matter and harmful gases in industrial waste gas.
- Industrial filtration
Oil filtration: used to filter lubricating oil, hydraulic oil, etc., remove impurities, and extend the service life of oil.
Chemical liquid filtration: used to filter impurities in chemical liquids, protect equipment, and improve product quality.
Food and beverage industry: used to filter impurities in food and beverages to ensure product quality and safety.
- Medical and Laboratory
Medical equipment: used to filter liquids and gases in medical equipment, ensuring the cleanliness and safety of the equipment.
Laboratory: used for filtering experimental liquids and gases to ensure the accuracy and reliability of experimental results.

Post time: Apr-10-2025