When people buy glass fiber dust bag, they often say that I want to cover the filter material, but the knowledge of glass fiber dust filter bag inside the film is also many, in the end which kind of glass fiber coating method is more scientific and more Durable yet. I am afraid this is not a professional person who does not know. For this knowledge point. I will give you a detailed description of the types of glass fiber membranes, which are more scientific and more durable.
Glass Fiber Dust Bag Glass Fiber Coated Membrane Filters include Continuous Glass Fiber Woven Fabric Covering Membrane Filters, Glass Fiber Bulked Yarn Coated Membrane and Glass Fiber Needle Felt Blanket Membrane Filter Media, Glass Fiber Membrane Filter Media in High Temperature Bags The dust collector has been widely used and has excellent results, especially in large-scale high-temperature bag filter applications.
There are two kinds of domestic glass fiber coating film lamination process.
One is the internationally popular hot-press lamination technology. The glass fiber coated filter material produced by this technology has high dust-removing efficiency, low running resistance, long service life, no film exfoliation, and can work at 260°C for a long time. Under the working conditions (instantaneous temperature up to 300°C), all properties of the filter bag do not change, the service life of the filter bag can reach more than 2 years, and the hot press lamination technology is internationally recognized as the most advanced technology in the world. Some of the well-known companies that make glass fiber coated membranes also use this technology. Three domestic companies, including our company, have this technology. The hot-pressure lamination technology is the quality of glass fiber coated membranes. The guarantee.
Another kind of glass fiber dust bag filter material overlay method is to use adhesive to bond PTFE film on glass fiber base fabric (abbreviated as, adhesive method), according to our many domestic adhesive film coating filter manufacturers The performance test of the glass fiber film products shows that the temperature is not enough. When the temperature of the adhesive glass fiber film filter reaches 100°C, the bonding adhesive has melted. At this time, the filter bag will have the following problems:
1) The film is peeled off. Due to the melting of the adhesive, the fastness between the film of the film filter and the base cloth has greatly decreased. At this time, the film is gradually pushed from the base cloth under the pressure of the dust. It caused film peeling down.
2) The resistance of the dust collector rises. According to normal conditions, the dust filter using the membrane filter bag should have low resistance, but the adhesive has melted when the temperature of the adhesive film filter reaches above 100°C. The melted adhesive is in the filter bag. The surface is in a liquid state, which causes a large amount of dust to be stuck on the surface of the filter bag. Because the adhesive ability of the adhesive is strong, the dust on the surface of the filter bag cannot be removed, but it will seriously block and cause a substantial increase in resistance, if the filter bag is When you remove it, you will find that the filter bag has become hard, and the surface of the cake with a knife is very difficult to scrape.
3) The service life of the fiberglass dust bag is short. Due to the agglomeration of the surface of the filter bag, the resistance of the dust collector rises and the filter bag is quickly blocked. We have seen a gas box pulse dust collector produced in Jiangxi. The filter bag is equipped with an adhesive glass fiber needled felt-covered filter bag. After four hours of booting, the filter bag was completely blocked.
In summary, we believe that glass fiber coated filter media is a high-efficiency, low-resistance, long-life high-temperature resistant filter media, but users must use hot-pressed laminated glass fiber coated filter media, otherwise you cannot achieve high efficiency and low Resistance, long life effect. We encountered a lot of manufacturers using glass fiber coated membrane filter. They think that the coated membrane filter is similar to ordinary filter media, and even the use effect is even worse than ordinary filter media. This is the wrong choice of adhesive glass fiber. As a result of the membrane filter, examples of failed use of adhesive glass fiber coated membrane filters are not uncommon, and users must be careful when buying them.