The Mesh Number Of Stainless Steel Wire Mesh Determines The Passing Size Of Filler Particles

The particle size of filler is generally graded by the percentage given by a certain number of stainless steel wire mesh. Such as 99 8% of the particles pass through the stainless steel wire mesh with 127.95 mesh (325 mesh), and the fineness of this filler is called 325 mesh. The number of holes corresponding to the stainless steel wire mesh can also be used to express the fineness of the filler in microns. If the distance between the stainless steel wires constituting the stainless steel wire mesh is 44um, the filler passing through the stainless steel wire mesh can also be called the filler with a diameter of 44um. Particles larger than 44um in diameter cannot pass through the stainless steel wire mesh, but particles smaller than 44um can pass through the stainless steel wire mesh and mix together. Because of this, in fact, the particle size and volume of the filler used are not equal to. There are two requirements for filler particle size: one is uniform particle size; Second, particle size dispersion Generally, the particle size should be about 5um, the maximum particle size should not exceed 20um, and the particle surface should be smooth. Particles of more than 20um will have a bad effect on the quality and character of the product. The particle volume of the filler has a certain relationship with the oil absorption value. The particles are large and uniform, and the total appearance of the filler is small when the particles are 8um. The oil absorption value is also low. It is easy to be infiltrated by natural resin. It can have tall participation amounts, such as calcium carbonate, silicon dioxide and coarse talc powder. Fine fillers and fillers with uniform particles of 5um or less have the size and oil absorption value of high surface plane or object surface. The viscosity of the natural resin system with a given amount of filler increases greatly, and the amount of participation must be small, such as clay, fine talcum powder, precipitated calcium carbonate, etc. The particle size dispersion of particles also has an impact on the application of fillers. If the particle size distribution of the filler is wide, the smaller particles can be embedded in the constant volume particles, and the medium and constant volume particles can be embedded in the larger particles, so the filler can be arranged more urgently, so as long as the minimum amount of natural resin can fill the holes between the particles.