Analysis of common filter materials

Common filter materials:

PE (Polyester): Polyester, in the filtration industry, refers to polyester chemical fibers, such as polyester fibers.

PP (Polypropylene): Polypropylene, in the filtration industry, commonly refers to ultrafine polypropylene fibers with static electricity (polarizers).

PTFE: Polytetrafluoroethylene, in the filtration industry, PTFE filter material refers to high-efficiency filter material made of polarized polytetrafluoroethylene fibers. PTFE filter material is a new type of filter material that has no trace volatile substances, good strength, but currently has the drawback of high price.

Synthetic Media: Synthetic fiber, also known as synthetic fiber.

Filter-related abbreviations:

G F H U;

G: Grob    F: Fein    H: HEPA (High Efficiency Particulate Air)   U: ULPA (Ultra Low Penetration Air)

HEPA (High Efficiency Particulate Air) Filter:  A filter with a filtration efficiency of ≥99.97% for 0.3 micron particles and certified by specified methods.

HEPA Diffuser: A non-uniform flow clean room air supply device equipped with a high-efficiency filter.

HEPA Panel: A common term for a high-efficiency filter without partitions used in clean rooms.

ULPA (Ultra Low Penetration Air) Filter: A filter with a filtration efficiency of ≥99.999% for 0.1 to 0.2 micron particles (USA) or ≥99.9995% for MPPS (Most Penetrating Particle Size) particles (Europe) or ≥99.999% for 0.12 micron particles (early USA).

Ventilation Filter: Refers to general ventilation filters, distinguishing them from high-efficiency filters used in clean rooms. Sometimes also referred to as Ashrae Filter.

FFU (Fan Filter Unit): An efficient filter unit with built-in fan, popular in high cleanliness manufacturing facilities, especially in contemporary integrated circuit production.

Mini-Pleat: A common term for a filter without partitions. Sometimes also called Close-pleated.

Pre-filter: A filter that protects the next level filter. Pre-filters can come in various forms and efficiency specifications.

Pulse-jet Filter: A self-cleaning filter or dust collector equipped with a compressed air pulse backflushing device.

Filter performance testing related knowledge:

GMP (Good Manufacture Practice): A mandatory standard that pharmaceutical factories must adhere to for quality management in drug production.

IAQ (Indoor Air Quality): The quality of indoor air.

MPPS (Most Penetrating Particle Size): A scanning test method used to measure the filtration efficiency of filters for particles with the most penetrating size.

NBS (National Bureau of Standard): The early name for the National Institute of Standards and Technology (NIST), which in the past set the AFI (Air Filter Institute) gravimetric method and colorimetric method as national standards.

Particle Efficiency: The efficiency of a filter measured using a particle counter.

Resistance: The resistance of a filter, sometimes also referred to as Pressure Drop or Differential Pressure (DP).

Sick Building Syndrome: Symptoms of illness attributed to poor indoor air quality.

Van de Waals Force: A type of intermolecular force between molecules or molecular groups, including orientation forces, induction forces, and dispersion forces. Dust adheres to filter media primarily due to Van der Waals forces. Activated carbon filters rely on Van der Waals forces when adsorbing chemical pollutants.

VOCs (Volatile Organic Compounds): Volatile organic compounds, referring to molecular pollutants in the air, particularly in the HVAC (Heating, Ventilation, and Air Conditioning) industry.

The above is an analysis of common filter materials. For more related information, please

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