PP Membrane Filter and Its Application

A PP (polypropylene) membrane filter is a type of microporous filter made from polypropylene material. These filters are widely used in various industries and applications due to their chemical compatibility, low extractable levels, and ability to withstand high temperatures. The PP membrane filters have controlled pore sizes that allow for the filtration of particles of specific sizes while maintaining high flow rates.

a. Application of PP membrane filter

PP membrane filter is used to filter out bacteria and particles from the liquid in the pharmaceutical, electronic, and biological manufacturing industry, brewing, clocks and watches, medical oil, lubricating oil, the fuel oil industry, and a scientific laboratory. Generally, a PP membrane filter can remove bacteria when the pore size is less than 0.45 microns and is used for removing particles the types larger than 0.65 microns.

  1. Microfiltration: PP membrane filters are commonly used for microfiltration applications to remove particles and microorganisms from liquids. They can be used in water treatment, pharmaceuticals, and food and beverage industries to ensure the removal of contaminants.
  2. Biopharmaceuticals: In the biopharmaceutical industry, PP membrane filters are used for the sterile filtration of liquids, gases, and air to maintain the purity of drug formulations and prevent microbial contamination.
  3. Laboratory Filtration: PP membrane filters are extensively used in laboratories for sample preparation, particle analysis, and sterilization. They are used in processes like clarification, prefiltration, and ultrafiltration.
  4. Environmental Monitoring: PP membrane filters find application in environmental monitoring to collect and analyze particulate matter from air and water samples. They are used in air quality monitoring stations and water quality assessments.
  5. Chemical Filtration: These filters are suitable for filtering aggressive chemicals, acids, and bases due to their chemical resistance properties. They are often used to ensure the purity of chemical solutions.
  6. Oil and Gas Industry: PP membrane filters are used in the oil and gas industry for water treatment and filtration of process fluids to remove contaminants and ensure product quality.
  7. Aerosol Sampling: In air sampling, PP membrane filters are used to collect airborne particulates for analysis, allowing researchers to study air quality, environmental contaminants, and allergens.
  8. Medical Applications: PP membrane filters can be used in medical devices and equipment for applications such as oxygenation, sterilization, and drug delivery.
  9. Electronics Industry: In the electronics industry, PP membrane filters are used to filter and purify process liquids, ensuring that the manufacturing environment remains contamination-free.
  10. Food and Beverage Industry: These filters are employed in the food and beverage industry for applications like clarification of fruit juices, removal of yeast and bacteria, and sterilization of beverages.

b. Specification of PP membrane filter

Membrane thickness (micron): 180-240
Pore size (micron): 0.1, 0.22, 0.45, 0.8, 1.0, 3.0, 5.0, 10.0
Diameter (millimeter): 150 200 300 400
Special specifications can also be customized

c. Characteristics of PP Membrane Filters:

  1. Material:
    • Polypropylene is a thermoplastic polymer known for its chemical resistance and inertness. PP membrane filters are typically made from this material.
  2. Hydrophobic Nature:
    • PP membranes are inherently hydrophobic, making them suitable for applications where water absorption or wetting is undesirable.
  3. Chemical Compatibility:
    • PP is chemically resistant, making PP membrane filters suitable for a wide range of chemical filtration applications.
  4. Low Protein Binding:
    • The low protein-binding properties of PP membranes are advantageous in biological and pharmaceutical applications where sample purity is critical.
  5. Broad Range of Pore Sizes:
    • PP membrane filters are available in various pore sizes, allowing for the filtration of particles and microorganisms across a range of sizes.
  6. Thermal Stability:
    • PP membranes are thermally stable and can withstand moderate temperatures, which is advantageous for applications involving heat sterilization.

d. Usage method of PP membrane filter

1. Place the membrane in a clean container and soak it in distilled water to make it all wet.
2. Fix the wet membrane into the appropriate filter (smooth side down) to prevent its leakage.
3. Lead the liquid to be filtered in from the inlet and empty air from the exhaust, and then begin to filter.
4. Keep operation pressure keep less than 0.3Mpa.

e. Attention to the PP membrane filter

1. This product should be kept away from sharp objects.
2. It is suitable for room temperature and 60% relative humidity preservation.
3. Please use this product in the effective shelf-life period.

f. Notes of PP membrane filter

1. This diaphragm is made of polypropylene, which is suitable for alcohols, ethers, acids, and ketones. It is not suitable for halogens.
2. The general working temperature of this product cannot exceed 65℃, sterilization temperature 125℃ for half an hour, withstanding 300 KPa.
3. Filtration membranes can only be used as the final stage of filtration. The solution must be pre-filtered through sand rods or filter paper first in order to avoid blockage.
4. This product is only suitable for the filtration of the aqueous solution. It’s not suitable for gas filtration.

PP membrane filters come in various pore sizes and diameters, making them versatile for a wide range of applications. When selecting a PP membrane filter, it’s important to consider factors such as the required pore size, chemical compatibility, temperature resistance, and specific application requirements.