To identify filter cloths, we must first understand several major technical indicators of the filter cloth. Among them are: density, thickness, weight, air permeability, and breaking strength. More practical density, thickness and weight, air permeability.
1. look first. (color of the filter cloth) In terms of the color, the large chemical fiber filter cloth is white and has a good gloss. Small chemical fiber filter cloth dark, gray, there are some filter mats such as Nomex, the color yellow. (Gloss of filter cloth) Long-fiber filter cloth with smooth surface and good shine, and the surface of the short-fiber filter cloth is covered with hair. (Texture of the filter cloth) There are also twill, plain, these lines, but also help you determine the model. Because some specifications are different, the specifications will be different.
2. touch again. (Softness) One of the staple fibers, such as 208,729, is like a fleece and is soft. 734, 747, 758, and 3927 are all made of the same kind of raw materials, but they have different thicknesses and densities. 3927 is very rough, strong and not soft. Softness, and roughness require that you hold the sample a little touch, write it down. It is not clear to speak. (Density) Density One hand touch, and the best number, 10cm has several wires. The corresponding filter cloth specifications have their own density coefficients, so long as they are compared, they can be roughly identified.
3. then called. Which is mainly to determine the thickness of the filter cloth, it is best to use a small piece to weigh it (grams per square meter).
4. then burn. Polyester burns black smoke and polypropylene burns. It is not easy to say that other burns are not allowed.
5. the above is a few technical advice, from the idea of our order is to first determine whether it is a woven fabric, and then determine the material (polyester, polypropylene or what), and then make a general judgment of the long and short fibers, lines. Then based on the filter cloth thickness, density, weight specifications comprehensive determination of filter cloth model. Of course, the premise is that you have a roughly corresponding model specification sheet.
