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How to convert the mesh to the micron

What is the purpose of the project? How to convert the mesh to the micron

Sieve diameter (m) = 14832.4/ mesh sieve

Measurement unit mesh size refers to the size of raw materials particles, usually the largest length of particles to express. The mesh is said standard sieve size. In the Taylor standard sieve, the mesh is 2.54 cm (1 inches) in length and number of sieve, referred to as.

Taylor Taylor: the standard screen screen for indexing is by 200 mesh sieve size 0.074mm as the benchmark, multiply or divide the main modulus square (1.141) times n (n = 1, 2, 3......) 200, get a coarse or fine mesh size, if the number of the root of four 2 (1.1892) of the n power to multiply or divide 0.074mm, you can get more detailed indexing of a series of screen size.

The greater the number, the finer particles said. Magnification similar to metallographic structure.

The sign said before the mesh can be leaking through the mesh mesh. Negative numbers can leaking through the mesh mesh, i.e. the particle size is smaller than the mesh size; while positive numbers can not pass the mesh mesh, i.e. particle size greater than the mesh size. For example, -100 particles of ~+200 mesh, which indicates that these particles can be from 100 to 200 and not from the leakage mesh to mesh leakage, in this screen mesh particles, should be large number (200) on the number of small (100) of the screen below, in large number (200) left the screen is -100~200 to particle.

Mesh μm Mesh μm
2 8000 100 150
3 6700 115 125
4 4750 120 120
5 4000 125 115
6 3350 130 113
7 2800 140 109
8 2360 150 106
10 1700 160 96
12 1400 170 90
14 1180 175 86
16 1000 180 80
18 880 200 75
20 830 230 62
24 700 240 61
28 600 250 58
30 550 270 53
32 500 300 48
35 425 325 45
40 380 400 38
42 355 500 25
45 325 600 23
48 300 800 18
50 270 1000 13
60 250 1340 10
65 230 2000 6.5
70 212 5000 2.6
80 180 8000 1.6
90 160 10000 1.3

Number is the number of holes, is the number of holes per square inch. The greater the number, the smaller the aperture. In general, mesh aperture (x = 15000 micron number). For example, pore size 400 mesh to 38 microns; 500 mesh diameter is about 30 microns. Because of the opening rate, it is because of braid with wire thickness is different, different countries are not the same as the standard, the existing American Standard, British standard and Japanese standard of three, the United Kingdom and the United States are similar, the difference of japan. China is using the U.S. standard, that is, the formula given above can be calculated.We are using the U.S. standard, that is the formula given above can be calculated. American Taylor standard sieve screen size comparison table can be seen in the following page details.

From this definition we can see, mesh size determines the size of the screen aperture. The mesh size determines the size of the largest particles of Dmax sieve powder. So, we can see that the 400 purpose of polishing powder could very fine, such as only 1-2 microns, might also be 10 micron, 20 micron. Because the screen size is 38 microns. We produce 400 purpose polishing powder D50 has a micron of 20.

Therefore, the particle size with a mesh to constant polishing powder is not proper, the correct approach should be used in particle size (D10, median diameter D50, D90) to represent the particle size, the maximum particle size with mesh conversion. If you have seen the Japanese standard for abrasive JIS standard, will feel very scientific. Each of their Abrasives gives D3, D50, D97 requirements, and different principles of particle size analyzer when the data is different. The requirements are very strict. For example, D50 is 2 micron powder, D3 is roughly 0.9 microns, D97 is a micron of 4. What do you mean? Of 2 micron powder, less than 0.9 microns cannot exceed 3%, greater than 4 microns cannot exceed 3%. This is very strict, the market to see the vast majority of polishing powder (including foreign) can not meet this requirement, especially fine powder exceeded serious.

 

The number of characterization of polishing powder particle size for a reason. The old is used in polishing powder and dry sieving dry milling process, so there will be 300 to D50 powder is about 9 microns, 500 to D50 is about 2 microns. We have been used down, but also to guide the production and use of basic. However, with the emergence of new production processes, higher precision requirements of the polishing needs, this approach should also progress.


Mesh number American Taylor standard sieve American Taylor standard sieve
  Mesh (mm)) Wire Diameter (mm) )
60 0.246 0.178
65 0.208 0.183
80 0.175 0.142
100 0.147 0.107
115 0.124 0.097
150 0.104 0.066
170 0.088 0.061
200 0.074 0.053
250 0.061 0.041
270 0.053 0.041
325 0.043 0.036
400 0.038 0.025