PTFE Polyester Needle felt Filter Bags

PTFE Polyester Needle Felt Filter Bags

PTFE Polyester Needle Felt Filter Bags combine polyester needle felt with a PTFE membrane to deliver high filtration efficiency, low pressure drop, and long service life. The PTFE membrane provides true surface filtration, preventing dust from penetrating into the filter media while improving dust release during pulse cleaning.

Compared with standard polyester filter bags, PTFE Polyester Needle Felt Filter Bags offer higher air permeability, smoother surfaces, lower operating resistance, and more stable filtration performance. They are widely used in dust collection systems for cement, steel, power plants, chemical processing, and other industrial applications.

Features

PTFE membrane for surface filtrationHigh filtration efficiency with low emissionsExcellent dust cake releaseLow pressure drop and energy consumptionHigh mechanical strength and wear resistanceResistant to folding and deformationStable performance under continuous operationThe recommended continuous operating temperature is 130–150°C, with a maximum instantaneous temperature of 150°C.

Filter Bag Selection

Selecting the right PTFE Polyester Needle Felt Filter Bags depends on filtration efficiency, airflow, and operating conditions.

The fiber density directly affects air permeability and dust collection performance. We offer different needle felt weights, including 500g/m², 550g/m², 600g/m², and 700g/m², depending on your application.

With a PTFE membrane, filtration occurs directly on the membrane surface rather than inside the felt, allowing high efficiency without sacrificing airflow. For non-laminated bags, finer fibers are recommended to improve filtration precision.

Our engineering team can customize fiber density, felt weight, and membrane specifications to meet different dust characteristics and operating environments.

Advantages of PTFE Polyester Needle Felt Filter Bags

High Filtration Efficiency

Unlike conventional depth filtration, PTFE Polyester Needle Felt Filter Bags use surface filtration. The PTFE membrane captures fine dust immediately, reducing emissions and maintaining high collection efficiency from startup.

Long Service Life

The durable polyester base combined with a PTFE membrane provides excellent abrasion resistance and stable mechanical strength. Lower cleaning stress helps extend filter bag service life and reduce replacement costs.

Low Pressure Drop

The smooth PTFE surface minimizes dust penetration and prevents media blockage. As a result, PTFE Polyester Needle Felt Filter Bags maintain low operating resistance, high airflow, and lower energy consumption throughout their service life.

Easy Pulse Cleaning

The non-stick PTFE membrane allows dust cake to release quickly during pulse cleaning. Less residual dust means more stable pressure loss, improved cleaning efficiency, and longer operating cycles.

Applications

PTFE Polyester Needle Felt Filter Bags are suitable for a wide range of industrial dust collection systems, including:

· Cement plants

· Steel mills

· Power plants

· Chemical processing

· MiningMetal processing

· Building materials

· Industrial boilers

We also provide customized sizes, finishes, and PTFE membrane laminations to match your dust collector design and operating conditions.