PTFE Coated Fiberglass Cloth is a high-performance composite material engineered for extreme conditions. It consists of a woven fiberglass substrate that is impregnated and coated on one or both sides with a layer of polytetrafluoroethylene (PTFE). This combination leverages the exceptional tensile strength and dimensional stability of fiberglass with the superior chemical resistance, non-stick properties, and wide operational temperature range of PTFE. The result is a durable, versatile fabric used across industries requiring reliable sealing, insulation, release, and conveyor solutions.
At Kaxite Sealing, we manufacture our PTFE Coated Fiberglass Cloth to the highest standards, ensuring consistent quality and performance. Our product stands out due to several critical features:
Selecting the right PTFE coated fabric requires careful consideration of its specifications. Below are the standard parameters for Kaxite Sealing PTFE Coated Fiberglass Cloth. Custom specifications are available upon request.
| Property | Test Method | Typical Value | Unit |
|---|---|---|---|
| Fabric Weight | ASTM D3776 | 18 - 50 | oz/yd² |
| Thickness | ASTM D1777 | 0.008 - 0.040 | inch |
| Tensile Strength (Warp) | ASTM D5035 | 300 - 1000 | lbf/in |
| Tensile Strength (Fill) | ASTM D5035 | 250 - 900 | lbf/in |
| Elongation at Break | ASTM D5035 | 5 - 15 | % |
| Peel Strength (Coating to Fabric) | ASTM D751 | ≥ 8 | lbf/in |
| Continuous Service Temperature | - | -100 to +500 | °F |
The weave pattern of the underlying fiberglass cloth significantly impacts the fabric's final characteristics. Kaxite Sealing offers several standard weaves:
| Weave Style | Yarn Construction | Characteristics | Common Applications |
|---|---|---|---|
| Plain Weave | E-glass, 5.5x4 | Smooth surface, good stability, balanced strength | General purpose seals, release sheets, insulation |
| Leno Weave | E-glass, 5x2 | High stability, minimal yarn slippage, open structure | High-temperature conveyor belts, dryer screens |
| Satin Weave | E-glass, 9x5 | Flexible, drapable, higher tensile strength | Complex gaskets, expansion joints, protective covers |
The unique properties of this material make it indispensable in numerous demanding environments. Key application areas include:
Q: What is the main difference between one-side and two-side PTFE coated fiberglass cloth?
A: A one-side coated cloth has a PTFE layer on only one surface, leaving the other side as raw fiberglass. This is often used in applications where adhesion or bonding to the uncoated side is required, such as when laminating the fabric to another material. A two-side coated cloth is fully encapsulated with PTFE on both surfaces, providing maximum chemical resistance, non-stick properties, and protection on all sides. This is the standard choice for gaskets, release sheets, and conveyor belts where both sides are exposed to process conditions.
Q: Can PTFE Coated Fiberglass Cloth be sewn or fabricated?
A: Yes, it can be fabricated using standard methods. For sewing, it is recommended to use PTFE-coated or high-temperature resistant threads (like Kevlar®) to maintain seam integrity at high temperatures. Die-cutting, ultrasonic welding, and heat sealing are also common fabrication techniques. For complex shapes, Kaxite Sealing offers custom cutting and fabrication services to meet precise specifications.
Q: How does it perform in terms of flame resistance?
A: PTFE Coated Fiberglass Cloth is inherently flame-retardant. The fiberglass substrate is non-combustible, and the PTFE coating has a very high ignition temperature and will not support combustion. It typically meets standards such as NFPA 701 and can be certified for various flame, smoke, and toxicity (FST) requirements for transportation and building applications.
Q: Is it suitable for food contact applications?
A: Certain grades of our PTFE Coated Fiberglass Cloth are manufactured to be compliant with FDA regulations 21 CFR 177.1550 for Perfluorocarbon Resin Coatings. This allows for indirect food contact, making it an excellent choice for conveyor belts in bakeries, food drying processes, and release sheets for food packaging. Always verify the specific compliance certificate for your intended application.
Q: What are the key factors to consider when specifying this material for a gasket?
A: Critical factors include: 1) Temperature Range: Ensure the continuous and peak temperatures of your process are within the material's rating. 2) Chemical Exposure: Identify all chemicals, including cleaning agents, the gasket will contact. 3) Pressure & Load: Select an appropriate fabric weight and thickness to handle the compressive load and maintain seal integrity. 4) Media: Consider the type of media (gas, liquid, abrasive slurry). 5) Flange Type & Surface Finish: Softer, thicker fabrics can seal on rougher surfaces. Consulting with Kaxite Sealing engineers is recommended for critical applications.
Q: How should PTFE Coated Fiberglass Cloth be stored and handled?
A: Store rolls or sheets in a cool, dry, and clean environment away from direct sunlight and heat sources. Keep the material in its original packaging until use to prevent contamination. Avoid sharp folds or creases which can damage the fiberglass core. When handling, use clean gloves to prevent oils and dirt from contaminating the non-stick PTFE surface, which could affect performance.
Q: Can this material be used outdoors?
A: Absolutely. The PTFE coating provides excellent resistance to UV radiation, ozone, and weathering. It does not become brittle or degrade significantly when exposed to the elements, making it a premier choice for architectural membranes, outdoor conveyor covers, and other exterior applications requiring long-term durability and performance.
