Air Filtration Fabric

• Air Filtration Fabric Characteristics
• Air Filtration Fabric Dimensional Stability
• Air Filtration Fabric High Heat Resistance
• Air Filtration Fabrics and Chemical Resistance
• Air Filtration Fabric Applications
• Air Filtration Fabric Finishes

Air Filtration Fabric Characteristics

Tensile Strength - Glass is one of the strongest textile fibers, having greater specific tensile strength than steel wire of the same diameter, at a lower weight. When woven into various patterns, the resulting filter fabric is exceedingly strong and durable. Strength and durability are especially important for filtration applications resulting in less frequent bag replacement thus saving our customer's valuable time and resources.

Air Filtration Fabric Dimensional Stability

Air filtration fabrics display low elongation under load, generally 3% or less. Air filtration fabrics made with glass fiber yarn provide excellent dimensional stability under various operating conditions. This characteristic is especially critical when a high level of dust collection particles can increase the load bearing requirement of the filter fabric.

Air Filtration Fabric High Heat Resistance

Filter fabrics have excellent heat resistance at relatively low cost. The glass fiber yarns retain approximately 50% of room temperature tensile strength at 700°F (371°C); approximately 25% at 900°F (482°C); with a softening point of 1555°F (846°C) and a melting point of 2075° F (1121 °C). Specific finishes applied to filter fabrics may alter the heat resistance properties somewhat.

Air Filtration Fabrics and Chemical Resistance

Fiberglass air filtration fabrics are by themselves highly resistant to attack by most chemicals. Our 373 finish applied to filter fabric adds a specific level of protection against various chemicals depending on the type of particulate collection involved.

Air Filtration Fabric Applications

• Refineries
• Basic power generation
• Large utilities
• Asphalt production
• Carbon black production

Air Filtration Fabric Finishes

BGF's finishes for air filter fabrics use proprietary technology to develop the most effective, reliable finishes available today. Our Research and Development team of highly trained and knowledgeable chemists engineer value into each and every air filtration fabric finish. We continually work with our customers to develop new techniques and chemistries that will improve the performance of our filter fabrics to meet the rigorous demands of the filtration industry.

Selecting the right finish ensures filter fabric performance and durability. Without a protective coating (finish) the glass filaments in filter fabrics can be broken through abrasion caused by dust particles or chemical attack from cage contact. BGF has developed four finishes to protect the filter fabric:

373 Chemical Resistant - A uniquely formulated proprietary finish composed of a polymer to prevent chemical attack of the glass filaments and PTFE to provide superior abrasion resistance. The finish is resistant to both acid an alkali attack. 373 Chemical Resistant air filtration fabrics are recommended for any air filter fabric application.

580 Triple Finish – Consists of a blend of silicone oils, graphite, and Teflon® which combine to protect the glass fabric from abrasion but only limited protection from chemical attack. 580 Triple Finish air filtration fabrics are recommended in cement production and metal foundry applications.

615 PTFE – A ten percent add-on of DuPont's Teflon®B particles encapsulates the glass fibers to prevent abrasion. Since PTFE does not bond to the glass filaments, fabric can be attacked chemically by acids or alkalis. 615 PTFE air filtration fabrics are recommended for use with utility base load boilers operating under mild pH conditions.

625 Acid Resistant – Consists of acid resistant polymers, PTFE graphite, and silicone oils. This filter fabric forms a covalent bond with molecules on the surface of the glass to shield it from chemical attack. 625 Acid Resistant filter fabrics are recommended for filtration of flue gases in industrial utility boilers and acid environments such as carbon black.

Filter Fabric for Particulate Collection
Filter Fabrics for Custom Applications
High Temperature and Chemical Resistance Filter Fabrics