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PTFE Membrane
BRAKING SYSTEM

PTFE Membrane

A PTFE membrane is a porous or solid film made from polytetrafluoroethylene, combining all core properties of PTFE material: chemical inertness, extreme temperature tolerance, low surface energy, and non-stick characteristics. Product forms include filter membranes, venting membranes, composite diaphragms, and custom-molded profiles. Widely used in demanding applications including chemical filtration, pharmaceutical sterilization, semiconductor ultrapure water treatment, and medical venting components.

    Product Features

    1. Chemical inertness
    Unaffected by virtually all liquids, including organic solvents, concentrated acids, alkalis, propellants, and cryogenic fluids.

    2. Wide temperature stability
    Service temperature range -100°C to +260°C; special grades up to -268°C to +300°C.

    3. Hydrophobicity
    Naturally hydrophobic, suitable for gas filtration, venting, and aeration applications; hydrophilic modified grades available for aqueous phase filtration.

    4. Low surface energy
    Non-stick surface with low coefficient of friction, anti-fouling, easy to clean.

    5. Pore size range
    0.05 μm to 10 μm, with precision grades available.

    6. Biocompatibility
    Inert, non-toxic, compliant with USP Class VI and FDA food contact regulations

    7. Thickness & support structure
    Available as unsupported pure film or with support layers (PP/PE); thickness range from 0.05 mm to several millimeters

    Product Specifications

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    Application

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    Advantages

    1. Chemical universal
    Resistant to virtually all chemicals (acids/alkalis/solvents/oxidizers); single material covers the majority of corrosive service conditions.

    2. Extreme temperature adaptability
    Continuous use from -100°C to +260°C, suitable for wide temperature range applications from low to high temperatures.

    3. Hydrophobic and hydrophilic options
    Naturally hydrophobic for gas and organic phase filtration; hydrophilic modified grades for aqueous phase processing.

    4. High precision customizable
    Pore sizes from 0.05 μm to 10 μm, covering full spectrum from microfiltration to sterilizing-grade filtration.

    5. Biosafety certified
    USP Class VI, FDA 21 CFR compliant, suitable for medical and food contact applications.

    6. Flexible construction
    Unsupported film / supported composite membrane / custom-molded profiles; thickness and dimensions customizable

    Manufacturing Standards

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    FAQ

    • 1. What is the difference between hydrophobic and hydrophilic PTFE membranes?

    • 2. What is the maximum operating temperature of PTFE membrane?

    • 3. Can PTFE membrane be sterilized?

    • 4. What common failure issues are seen in PTFE membrane applications?

      Common quality issues with PTFE films include surface defects (cracks, patterns, roughness, white spots), dimensional deviation, warping, and low breakdown voltage. Surface fuzzing (filamentous protrusions, fibrous burrs) often stems from poor raw material quality, improper molding process parameters, or post-processing damage (blunt slitting blades, excessive winding tension). These can be effectively mitigated by selecting high-quality resin, optimizing sintering parameters, and standardizing handling procedures.

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