What Is Polyester Filter Bags?

Polyester filter bags are commonly used in the filter bag industry. Manufacturers make polyester needle felt filter bags by needle-punching short polyester fibers. They roll the fibers into a fabric. First, they lay the fibers into a fiber web. Then, barbed needles reinforce the web, turning it into a cloth. Next, barbed needles reinforce the web, turning it into a cloth. This needle-punching process strengthens the fibers, forming a durable needle-punched non-woven fabric.

The air permeability of polyester filter bags is more than 50% higher than that of ordinary calendered filter materials. These bags feature a smooth surface, excellent air permeability, and low resistance, which contribute to efficient filtration and lower energy consumption in filtration systems.

Features & Advantages

Features
Polyester PE filter bags are made from ultra-fine, high-quality fiber yarn, which is needle-punched to form a tortuous, three-dimensional filtration material. This unique structure, combined with superior air permeability, enables the filter bags to effectively capture fine solid and colloidal particles while minimizing the risk of clogging. The high-strength fibers used in the bag construction prevent damage even when fluid pressure increases during the filtration process.

The surface of the felt fabric undergoes high-temperature heat treatment, singeing, and calendering processes. These treatments ensure that fibers remain securely in place, preventing contamination of the filtrate due to fiber detachment. This method avoids the excessive clogging of filter holes caused by traditional rolling techniques, which can shorten the lifespan of the filter bag. As a result, they improve filtration efficiency without compromising flow rates.

Advantages
Polyester filter bags offer enhanced surface smoothness, which significantly improves cleaning efficiency. When compared to woven fabrics with lower air permeability, filter bags made from high-air-permeability materials offer superior performance. This results in better airflow, reduced dust adhesion, and lower operating resistance.

By optimizing both air permeability and surface smoothness, polyester filter bag not only achieve higher filtration accuracy but also reduce dust accumulation and extend filter life. This improves filtration efficiency and reduces maintenance costs, making them an ideal solution for various industrial filtration needs.