Gester Instruments | Professional Textile, Footwear and PPE Testing Equipments Manufacturers Since 1997
Are you still troubled by flammable and easily charged dust? Dust bag can help you solve it
Under the working conditions of the bag filter, some dust is flammable and explosive. Dust combustion or explosion fire source is usually caused by dust friction sparks, static sparks, hot particles, etc., of which the charging hazard is the greatest. This is because chemical fiber filter materials are usually easily charged, so when dealing with combustible and easily charged dust such as coal powder, coke powder, alumina powder and magnesium powder, our bag filter bag It is advisable to choose flame-retardant dust-removing cloth bags and anti-static dust-removing cloth bags. Flame-retardant dust-removing cloth bags, first of all need to choose the material, generally considered that the oxygen index (LOI) is greater than 30 fiber woven filter material, you can choose PTFE, P84 and other materials; and for the fiber with oxygen index (LOI) less than 30 For example, polypropylene, polyester, imide, etc., these dust-removing cloth bag filter materials need to be impregnated with flame retardant to ensure the excellent flame retardancy of the filter bag. After the concentration of industrial dust reaches a certain level (ie the explosion limit), if it encounters electrostatic discharge sparks or external ignition and other factors, it is very easy to cause explosions and fires. For example, flour dust, chemical dust, coal dust, etc. may explode if exposed to electrostatic discharge. In the field of bag dust removal, if the dust needs to be collected by cloth bags, the filter material made of the dust cloth bag is required to have anti-static properties. Anti-static dust removal cloth bag means that conductive fibers are mixed into the dust removal filter material fiber to make the filter material have conductivity in the radial or weft direction. There are two mixing methods. One is to incorporate a copper complex conductive yarn into the warp yarn of the needle-punched felt base fabric, which is called stripe antistatic; the other is to mix conductive fibers evenly into chemical fibers, which is called blended antistatic. Commonly used conductive fibers are stainless steel fibers and modified chemical fibers. Compared with the two, the conductivity of the former is stable and reliable, while the conductivity of the latter tends to decline after a certain period of time. Anti-static dust collection bag has excellent anti-static performance. It is used in flour dust, chemical dust, coal dust and other industries that may explode in case of electrostatic discharge. It is an ideal choice for explosion-proof dust collection at present. In addition, for these flammable and explosive smoke and dust, other necessary flame-retardant and explosion-proof measures must be taken in the design of dust removal equipment and systems. For example, inert gas is mixed into the flue gas to increase the moisture content of the gas, and additional flame-retardant safety devices are added. The Standard Group and Teijin of Japan have joined forces to provide customers with exclusive services for dust collection bags and dust collectors to meet customer needs for different working conditions. It is made with international new technology. Each square meter of filter material is subjected to high temperature heat setting treatment. The dimensional stability of the filter material is largely guaranteed. Standard Group can singeing, calendering, coating, dipping, laminating, waterproofing and oil-proofing the filter material according to the requirements of different working conditions. According to the requirements of the customer's dust removal equipment, the dust collector cloth bag is made exclusively to ensure that the filter bag and the flower plate are closely attached to avoid dust leakage from the flower plate hole. About the dust bag http://www.standard-groups.com/TextileGarment/2512.html
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1. ISO 5402-1: Specifies the flexometer method for testing leather flex resistance under repeated bending.
2. ISO 17694: Defines test methods for footwear upper and lining flex resistance, simulating real-world bending stress to assess long-term durability.
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