Our ePTFE Manufacturing Process

Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer material known for particular characteristics, such as high chemical resistance and thermal stability. These and other properties make it useful for your processes.

TTG goes beyond the limits of this material, creating expanded PTFE (ePTFE) that offers many of the same properties as the original product, but with additional characteristics that enhance its usefulness for your operations. Our expert process results in a material precisely made for your application.

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How Is Polytetrafluoroethylene Made?

The PTFE manufacturing process combines fluorspar, chloroform, hydrofluoric acid and water. Then they must be heated to over 1,000 degrees Fahrenheit to synthesize tetrafluoroethylene (TFE) from materials. Once TFE is made, it must be changed into PTFE in the same location, because TFE is very flammable. A process called radical polymerization enables the generation of the end product, PTFE. ePTFE is made by taking additional steps to shape PTFE.

Our Custom ePTFE Manufacturing Process

Turning PTFE into ePTFE takes high quality standards, specialized equipment and in-depth expertise. TTG has it all. We have a state-of-the-art facility with advanced equipment to help us complete each stage of treatment. We uphold rigorous manufacturing standards through an ISO 9001-certified quality management and performance optimization system. Our experts use a highly collaborative process to get the result your operation needs, including laminate, gaskets and membranes.

1. Customer Collaboration

We begin by discussing your preferences for the product and its desired use case. During this stage, we work closely to understand performance needs. We can set up a technical consultation through joint development to determine the product’s ideal characteristics.

2. PTFE Resin Selection and Preparation

Once we fully understand your needs, we start the manufacturing process. Our team selects a premium resin tailored to your desired purity, particle size and other specifications. Then, we blend with a lubricant before further processing.

3. Paste Extrusion

We utilize specialized equipment to extrude the material into a preform. Adjusting the extrusion parameters enables us to adapt the end-use properties to fit your desired use case. For example, the customized ePTFE membrane process may be different than the process used for a gasket.

4. Expansion

Following extrusion, we rapidly stretch the material under a tightly controlled temperature and rate to create a microporous structure. The pore size and orientation may vary based on your application, whether for filtration, venting, or other uses.

5. Sintering

This stage involves using heat to stabilize the porous structure. It is a precise process to prevent melting the material. Our team can fine-tune the sintering conditions based on the desired mechanical strength and performance your application requires.

6. Lamination or Further Processing

Lamination layers the ePTFE with other substrates or functional layers to create composite membranes or a reinforced structure. We use this custom laminate manufacturing process if it is necessary for your application.

7. Quality Control

Before presenting the product, we complete final checks for details like pore size, thickness, mechanical properties and chemical resistance. During these processes, we compile detailed reports you can use to confirm that the result meets your needs.

8. Customer Evaluation

First, we complete the production process on a small sample and give it to you for validation and feedback. Based on your input, we can tweak our processes to create different iterations that meet your needs.

9. Final Production

After confirming that the result suits your needs, we’ll scale up production to create the amount your application requires. As we increase production, we maintain strict quality standards for reliable results.

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We’ll Guide You Through Every Step

With TTG, you gain a collaborative partner for ePTFE production. We adapt our processes to suit you. Get in touch to share your application. We can consult with you to create the ideal solution.

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