The membrane composite filter material successfully developed in the mid-1990s is to cover PTFE on woven fabric, non-woven fabric or glass fiber filter material. It has high filtration efficiency (the filtration efficiency for sub-micron dust is over 9919%), low resistance (30%~40% lower than traditional filter materials), and long service life (up to 2~5 times that of traditional filter materials). The advantage of high dust exfoliation rate. For example, we recommend the use of this type of filter bag for dust removal in our premix workshop.
The requirements for filter bag materials include the following technical properties: filter bag materials are suitable for different temperatures, have good peelability, and are easy to clean. Dust, good air permeability, low resistance, high filtration efficiency, high strength, can withstand high-intensity dust cleaning, long service life, and affordable price. Polytetrafluoroethylene filter bag membrane is a good choice.
Polytetrafluoroethylene (PTFE), also known as Teflon, is stretched into a strong microporous material with a pore diameter of 0.1μm~2.0μm , porosity is greater than 80%, good electrical insulation and surface smoothness. PTFE filter materials are often treated with coating or acupuncture techniques to improve dust removal efficiency and extend service life.
The filter bag is the core filter component of the bag dust collector, and its cost accounts for about 10% to 15% of the equipment cost. The material of the filter bag used to make the filter bag directly determines the performance parameters of the bag dust collector.
Polytetrafluoroethylene is a neutral polymer compound with a special molecular structure, that is, a completely symmetrical structure. The special structure makes it have good thermal stability, chemical stability, insulation, lubricity, water resistance, etc. Filtration performance: good temperature resistance, wide operating temperature range, can be used continuously for a long time at 260°C (high temperature, instantaneous temperature can reach 280°C); strong chemical stability, corrosion resistance; good self-lubricating, extremely low friction coefficient, filter wear Very small; PTFE filter bag membrane has very low surface tension and has good non-stick and water repellency.
Polytetrafluoroethylene filter bag membrane can achieve surface filtration. This is because the PTFE-coated filter material has a microporous structure and has no through-holes on the surface, so dust cannot enter the interior of the membrane through the surface of the membrane or In the base material, only the gas passes through and the dust or materials are trapped on the surface of the membrane. At present, membrane-coated filter materials have been widely used in many fields such as industrial dust removal and precision filtration.
Polytetrafluoroethylene filter bag membrane is a new type of filter material for dust removal and materials. After coating treatment, the surface is very smooth, and its dust removal principle is called microporous screen Filtration mainly uses surface filtration. Almost all the filtered substances are intercepted, and it has a high dust removal efficiency. The pore diameters (usually referred to as average pore diameters) of three-layer and five-layer composite materials are 0.5um, 1um, 3um, the purpose is to adapt to various particle sizes of dust, etc., the dust separation performance is excellent, and it can operate at high temperatures. If you are interested, please enter the store for consultation.