Do you know the heat resistance temperature of PPS+PTFE coated needle-punched felt?

The heat resistance temperature of PPS+PTFE membrane needle punched felt ranges from 170℃ to 210℃, with a long-term operating temperature below 190℃, an instant heat resistance of 210℃ and a melting point of 230℃. It features excellent flame retardancy, wear resistance and high heat resistance, and its resistance to acids, alkalis and oxidative alkalis is second only to PTFE (polytetrafluoroethylene) needle punched felt. The PPS+PTFE membrane needle punched felt filter material/filter bag has high porosity, small pores and high filtration precision. Its shrinkage rate is less than 0.7% after continuous heating at 190℃ for 30 minutes, and no shrinkage occurs when heated for less than 20 minutes. For instantaneous temperature of 190–200℃, the duration per exposure shall not exceed 5 minutes, with a total annual accumulation of no more than 30 minutes; for 180–190℃, the duration per exposure shall not exceed 10 minutes, with a total annual accumulation of no more than 100 hours. In industries under normal working conditions, the emission concentration of coal-fired boilers in power plants can be reduced to below 10mg/Nm³. PPS+PTFE membrane filter bags are widely recognized filtration materials for pulse-jet dust collectors in dust collection treatment of coal-fired boilers, waste incinerators, fly ash in power plants and other equipment.

1. PPS+PTFE membrane filter bags have the following characteristics:

Continuous temperature resistance of 170℃ and instantaneous temperature resistance of 190℃;

2. Excellent chemical stability, resistance to acids, alkalis and organic solvents, which extends the service life of the filter material;

3. Usable under working conditions with oxygen content lower than 16%;

4. High dust cleaning efficiency, applicable with low dust cleaning pressure, long service cycle and reduced operational costs.

 Product Advantages:

Raw Material Selection

Domestic or imported PPS (polyphenylene sulfide) fibers and PTFE fibers are adopted for production.

Structural Design

Customized membrane-coated PPS+PTFE needle punched filter felts with easy dust cleaning performance can be manufactured according to the purification characteristics of high-temperature flue gas and dust. The felts feature uniform surface, high density, good air permeability, small pores and high porosity.

Application Fields

PPS+PTFE membrane filter bags are widely used for dust removal, filtration and material recovery in industries such as iron and steel, cement, chemical engineering, boiler, casting, flour processing, wood processing, blast furnace gas, and coal handling in power plants.

 Product Details

1. Fibers for high-efficiency filtration, reducing emissions and operational resistance

1）The company carefully selects Toray PPS fibers from Japan to increase the filtration area and reduce the filtration pores of the filter material. The surface is coated with PTFE membrane, which improves filtration efficiency, lowers emission concentration and reduces operational resistance.

2）The filter materials are produced with internationally advanced Autefa equipment from Germany, ensuring stable product performance.