Dust removal filter material membrane making process

Generally speaking, industrial cloth belongs to deep filtration. High temperature filter bags achieve effective filtration by forming a disposable dust layer on the surface of the dust removal filter material. However, the dust removal bag manufacturers take a longer time to form effective filtration, and the equipment operation resistance is relatively high. However, the dust removal efficiency is low. Therefore, many manufacturers only have membrane covered filter materials, which have high dust removal efficiency.

1. Film coating process

There are two methods for combining thin films with dust removal filter materials. One is thermal bonding, which involves first treating the filter material and singeing it. Then, through a series of rolling, the two will combine under the combined action of high temperature and pressure. Thermoplastic filter materials can be directly thermally bonded, but for thermosetting filter materials, Teflon treatment must be performed first before thermal bonding. The second method is to use

Although Adhesive is bonded together, its strength is low. Under the working conditions of high temperature and special gas, Adhesive failure will cause the membrane to separate from the filter material, and Adhesive will block the membrane hole of the filter material, thus reducing the air permeability of the filter material.

2. Characteristics of membrane covered filter materials

(1) After the dust removal filter material is covered with film, the pore size of the filter material fibers will become smaller, and the pore size of the covered filter material will be reduced by about 12% compared to the previous one without film. The covered needle felt filter material is 59% of the pre covered (pressed) filter material, thus achieving true surface filtration. It is no longer necessary to form a dust layer, and only relying on its own filtering function can achieve good dust removal effect. The experiment shows that the film covered dust removal filter material has an effect on 0.01 μ M-1 μ The dust collection and filtration rate between m ranges from 97% to 99%, with a total dust collection rate of over 99.99%.

(2) When the pore size of the dust removal filter material decreases, dust can be controlled to enter the filter material, thereby preventing blockage of the filter material. Secondly, the membrane covered filter material reduces the friction of dust on the surface, improves the cleaning ability, and achieves the goal of easy cleaning. At the same time, it also reduces the operational resistance of the equipment and maintains stability for a long time.