Thermal Conductivity of PTFE Coated Fiberglass Fabric

Jiangsu Aokai New Materials Co., Ltd. — Your Trusted PTFE Fabric ManufacturerWhen discussing applications involving thermal insulation or heat conduction, thermal conductivity is the primary technical indicator for PTFE coated fiberglass fabric. According to actual test data, PTFE coated fabric does not have a fixed value. Depending on thickness and composite structure, its thermal conductivity generally ranges from 0.035 to 0.28 W/(m·K). Overall, PTFE coated fiberglass fabric is recognized as an outstanding thermal-insulating composite material.

1. Thermal Conductivity Data for Different Specifications of PTFE Coated Fiberglass Fabric

Variations in thermal conductivity mainly stem from whether the test object is pure PTFE resin or the finished PTFE coated fiberglass fabric assembly.

· Standard PTFE Coated Fabric: 0.20–0.28 W/(m·K). The thermal conductivity of pure PTFE resin is approximately 0.25 W/(m·K), forming the basic surface properties of PTFE coated fabric.

· Thin PTFE Coated Fabric: Test results show that 0.13 mm thick PTFE fabric tape has a thermal conductivity of approximately 0.28 W/(m·K) at 240°C.

· Thick PTFE Coated Fabric: When thickness increases to 0.25 mm at the same 240°C temperature, thermal conductivity drops to about 0.21 W/(m·K). Some data indicates that PTFE fabric thicker than 0.2 mm can reach as low as 0.18 W/(m·K).

· Special High-Insulation PTFE Fabric: Some products designed for extreme thermal insulation are rated as low as 0.035 W/(m·K), typically measured under specific conditions or accounting for internal air gaps.

· Composite Structure: Since PTFE fabric contains a fiberglass base with relatively high thermal conductivity (approx. 1.0 W/(m·K)), the overall thermal conductivity of the finished fabric is higher than that of pure PTFE resin.

2. Key Factors Affecting Thermal Conductivity of PTFE Coated Fiberglass Fabric

Actual thermal insulation performance is determined by multiple physical structural factors. Selection of PTFE coated fabric should consider the following variables:

· Thickness: Increasing thickness is the most effective way to reduce thermal conductivity and improve thermal insulation.

· Base Fabric Weaving: The density and weaving style of internal fiberglass directly alter heat transfer paths.

· Operating Temperature: Within its long-term temperature range (-80°C to 260°C), thermal conductivity of PTFE coated fabric remains relatively stable.

3. Thermal Insulation Comparison Between PTFE Coated Fabric and Other Materials

To clearly illustrate the thermal performance of PTFE coated fabric, a comparison with common materials is provided below:

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Understanding the thermal conductivity characteristics of PTFE coated fiberglass fabric is essential for properly utilizing its non-stick, high-temperature resistant, and insulating properties. Whether for thermal insulation or heat transfer efficiency, product selection must be carefully matched to specific specifications.

The above information is provided by Jiangsu Aokai New Materials Technology Co., Ltd.

For detailed parameters, application scenarios, and customized solutions for our full product range — including PTFE coated fiberglass fabric, PTFE high-temperature tape, PTFE open mesh conveyor belts, seamless fusing machine belts, single-sided PTFE fabric, high-temperature resistant conveyor belts, and heat-resistant fiberglass fabric — please contact us:

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