How to determine the mesh size

  1. Mesh refers to the number of empty eyes per square inch screen, 50 mesh means that the per square inch of holes is 50, 500 mesh is 500, the higher the number of mesh, the more holes. In addition to representing the perforations of the screen, it is also used to indicate the particle size of the particles that can pass through the screen. The higher the mesh number, the smaller the particle size.
  2. Powder particle size, said particle size. Due to the complex shape of the particles, there are usually several methods, such as sieving size, settling size, equivalent volume size and equivalent surface area size. Screening granularity is that the particles can pass through the screen mesh size, to 1 inch (25.4mm) width of the mesh sieve number, which is called "mesh." At present, at home and abroad have not yet had a uniform technical standards for grain size, all companies have their own definition and representation of the granularity index. In different countries, different sectors of the screen specifications have different standards, so the meaning of "mesh" is also difficult to unify.

At present, the calculated diameter of equivalent volume particles is used internationally to represent particle size. Expressed in μm or mm.

Attachment: conversion relationship: 1 μm = 1 micrometres (microns) = 0.001 millimetre (mm)

The empirical formula for the conversion of micrometers to meshes is as follows: the larger the mesh number, the greater the error.