Composite High-Temperature-Resistant Needle-Punched Felt(FMS)

Composite high-temperature-resistant needle-punched felt(FMS) is an innovative product developed specifically for domestic operating conditions. It is produced through a layered composite process that combines two or more types of high-temperature-resistant fibers (typically a blend of inorganic and organic fibers), designed to achieve superior physical and chemical properties. Its production process and manufacturing technology have been granted national patents.

This series of composite needle-punched filter felts features core characteristics such as high-temperature resistance, high strength, resistance to acid and alkali corrosion, wear resistance, and fold resistance. After undergoing surface chemical treatments—including lamination, coating, and impregnation—as well as finishing processes, the felts also offer functions such as easy dust removal, water and oil repellency, and antistatic properties; A series of products is available to accommodate different temperature ranges, including 150–200°C, 200–250°C, and 250–300°C.

Compared to glass fiber filter media, these products offer significantly improved abrasion resistance, fold resistance, and peel strength. They can withstand higher filtration loads, with filtration air velocities reaching 1.0 m/min or higher, and exhibit low operating resistance: Compared to high-temperature synthetic fiber filter media, it overcomes the shortcomings of synthetic fiber filter media—such as high elongation, significant deformation, low temperature resistance, and poor corrosion resistance—and demonstrates superior dimensional stability and strength, while offering better value for money than pure high-temperature synthetic fibers.

To date, our company has developed a series of products suitable for various industries and operating conditions.

Composite High-Temperature-Resistant Needle-Punched Felt(FMS) is not a single-fiber material, but rather a needle-punched felt made from a blend of fibers. The mainstream formulation consists of glass fiber + PPS + a small amount of PTFE + aromatic synthetic fibers, making it an economical filter media suitable for medium- and high-temperature applications.

Key Advantages and Disadvantages

Advantages

1. Wide temperature resistance range and strong resistance to short-term temperature spikes. Compared to polyester (maximum 130°C), Composite High-Temperature-Resistant Needle-Punched Felt(FMS) can operate stably at 150–200°C, 200–250°C, and 250–300°C; it is not easily damaged by occasional temperature spikes in kilns, making it suitable for applications with unstable temperature control.
2. Outstanding cost-effectiveness. Priced significantly lower than pure PPS and aramid needle-punched felts, it serves as a low-cost sub-high-temperature solution for small and medium-sized kilns.
3. Superior abrasion resistance and tensile strength compared to pure glass fiber filter media. Pure glass fiber filter cloth is brittle and cannot withstand pulsed bending; Composite High-Temperature-Resistant Needle-Punched Felt(FMS)blended fabric offers greater flexibility and is well-suited for pulsed baghouse dust collectors.
4. Acceptable acid resistance: Suitable for weakly acidic flue gas containing small amounts of SO₂; widely used in metallurgy, cement kilns, asphalt mixing plants, and lime kilns.

Disadvantages

1. Weaker oxidation resistance than pure PPS: In environments with high flue gas oxygen content or the presence of strong oxidizing agents such as NOₓ, the filter media ages significantly faster, resulting in a drastically shortened service life.
2. Hydrolysis resistance is average. In environments with sustained high temperatures combined with high humidity and condensation, the fiber interfaces are prone to delamination, leading to a decrease in strength; use with caution in conditions with frequent condensation.
3. Alkali resistance is poor. When exposed to high-concentration alkaline flue gas or long-term penetration by lime dust, the fibers are prone to erosion and becoming brittle.

Suitable Operating Conditions

Cement kiln tail gas, lime kilns, small smelting furnaces, asphalt mixing plants, drying kilns, foundry flue gas, and refractory dust collection; flue gas temperatures of 150–200°C, 200–250°C, and 250–300°C; applications with intermittent high-temperature spikes; and projects with limited budgets.