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When filtration is on the discussion topic, then the filtration rate is an element that has to be talked and discussed, since this is the essence of filtration.

Material Introduction: Polyamide or Nylon is the major engineering and high performance thermaplastic class because of its good balance of properties. Polyamides contain repeating amide linkages i.e. –CO-NH–. It is formed by condensing identical units, copolymers for different units.

Polyamides (or Nylon) are made from polycondensation of diacid with a diamine or by ring-opening polymerization of lactams with 6, 11 or 12 carbon atoms. 

• The monomers may be aliphatic, semi-aromatic or aromatic (aramids)
• They may be amorphous, semi-crystalline and of greater or lesser crystallinity

A micron is a unit of measure in the metric system equal to 1 millionth of a meter in length (about 39 millionths of an inch). The average cross-section of a human hair is 50 microns. The human bared-eyes cannot see anything smaller than 40 microns in size. Let us see what micron rating is in filtration industry when we talk about filter media, such as filter mesh, filter cloth, filter felt.

In filtration industry, different meshes can be used for different industries, which vary from working temperature to chemical resistance, so we will need to obtain the knowledge of different plastic fibers, so we will know what most suitable filter meshes should be applied. Below is the datasheet of major plastic fibers.