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High-Efficiency Self-Sealing Filters from China Suppliers - Leak-Proof Solutions for Industrial Filtration Needs

Introducing our high-performance self-sealing filter, crafted from ultra-high molecular weight polyethylene (UHMW-PE) or composite polymer material. This innovative filtration element is designed with key features such as hydrophobicity and a self-sealing effect. In its dry state, it allows gases to pass through with ease. However, upon contact with liquids, the micropores rapidly close, creating an effective barrier that prevents liquid spillage and aerosol contamination. Our products are extensively utilized in various fields, including medical, laboratory, and environmental protection, making them essential for preventing cross-contamination and enhancing operational safety. As a leading manufacturer and supplier in China, our factory ensures that you receive top-quality self-sealing filters tailored to meet your specific needs

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    Product Details

    ARTERIAL BLOOD COLLECTION DEVICE SELF-SEALING FILTER

    In the arterial blood collection process, the filter source stop spill cartridge can be used with the arterial blood collection needle to simplify the blood collection process, quickly isolate the air and prevent the exchange of gas between blood and air.

    ESR TEST TUBE SELF-SEALING FILTER

    Blood sedimentation (ESR) is a routine clinical testing. In clinical practice, disposable hematocrit tubes are used to measure the distance of red blood cell decline over a period of time as a basis for diagnosis of various diseases. Our factory cartridge makes the ESR test more convenient. The principle of hematocrit test: The filter element is placed at the "0" scale of the hematocrit tube. When the cartridge is pressed down, the cartridge is free of water and air, allowing the blood to move up. Once it touches the blood, the cartridge will produce a self-sealing effect and the blood will no longer move up. The cartridge is left in place and the degree of blood cell drop is observed.

    INFUSION SET SELF-SEALING FILTER

    Intravenous infusion is a widely used method of drug delivery in clinical practice, and it is necessary to ensure that no air is retained in the wall of the infusion set. Conventional infusion set venting is tedious and time-consuming, and the drug often spills out and causes pollution on the ground. Exposure to air (eg: antibiotics) may cause problems such as increased bacterial resistance. Our factory Self-sealing filter can greatly simplify the venting operation by cooperating with the infuser, and the one-time venting success rate is close to 100%, and can effectively prevent the drug. The success rate of one-time venting is close to 100%, and it can effectively prevent the spilling of medicine.

    CATHETER SELF-SEALING FILTER

    Our factory Self-sealing filter works with the indwelling needle, and the indwelling needle can protect the patient's blood vessels, reduce the pain of vascular puncture, and improve the efficiency of the medical staff.

    DISPOSABLE DRAINAGE BAG SELF-SEALING FILTER

    Disposable Drainage Bag Stop Spill Valves are widely used in hospitals for waste fluid handling systems. Our factory disposable drainage bag stop core allows air to escape freely through the waste fluid collection bag. Once it comes into contact with the liquid, the core will produce a self-sealing effect, effectively stopping the liquid from spilling out and preventing the liquid from contaminating the instrument and the environment.

    Parameter of self sealing filter

    Parameters Typical Specifications Application Scenarios
    Material Ultra High Molecular Weight Polyethylene (UHMW-PE), Fluorinated Ethylene Propylene, Polydimethylsiloxane, etc. General
    Working Pressure >50 kPa (some models >70 kPa) Medical Waste Liquid Handling, Drainage Bag
    Filtration Accuracy 0.2-15 μm (customizable) Aerosol Barrier, Liquid Filtration
    Diameter/Thickness Diameter 3.6-20 mm, Thickness 4.5-30 mm (Example: CC36-45 type diameter 3.6 mm, thickness 4.5 mm) Infusion set, indwelling needle, hemosorbent tube
    Chemical Resistance Resistant to strong acids, strong bases, organic solvents (e.g., chloroform, methanol) Chemical Filtration, Laboratory Analysis
    Biocompatibility Medical compliant, no CNase/DNase contamination Medical devices (e.g., indwelling needles, blood collection tubes)

    Production process of self sealing filter

    1 Material Preparation: Choose UHMWPE (main raw material) and fluorinated ethylene propylene, polyurethane and other additives, and mix them proportionally.
    2 Mixing and stirring: Mix the main material with cross-linking agent, foaming catalyst and other auxiliaries in the mixing tank for 1-2 hours.
    3 Mold forming: Choose the mold according to the shape of the product, fill the material and then mold it at high temperature by molding and sintering machine.
    4 Post-treatment: Centrifugal deburring after cooling, visual inspection of appearance (black spots, burrs).
    5 Quality control and packaging: Pass bubble uniformity test, pressure test, vacuum packaging.

    Advantages of self sealing filter

    1 Safety: Self-sealing effect prevents liquid spillage and reduces the risk of medical infection;
    2 Durability: High pressure resistance (5-10 meters water column), corrosion resistance, long service life;
    3 High precision: Uniform distribution of micropores, controllable air permeability, suitable for different filtration needs;
    4 Environmental protection: Non-toxic materials, can be repeatedly rinsed to reduce medical waste;
    5 Convenience: Flexible design to fit a variety of instruments with inner diameter, simplify the operation process.

    Application of self sealing filter

    Fields Applications Examples of Typical Scenarios
    Medical Infuser Venting, Indwelling Needle Spill Prevention, Hematocrit Tube Testing, Urine Collector/Drainage Bag Waste Disposal Preventing Antibiotic Spills, Blood Contamination
    Laboratory Pipette Tips Anti-Contamination, Solid-Liquid Phase Separation, Sample Handling Avoiding Aerosol Contamination in PCR Experiments
    Industrial environmental protection Water treatment, chemical filtration, waste purification High-flow sewage treatment, corrosion-resistant gas filtration
    Food/Pharmaceutical Liquid decolorization, reverse osmosis pretreatment, aseptic packaging Mineral water purification, oral liquid filtration

    Note

    Customization service: Support personalization of different sizes, pore diameters and materials (e.g. PTFE, titanium metal).
    Quality certification: The whole production is done in clean plant, which meets the ISO medical standard, and some models have passed the FDA certification.

    For more detailed parameters or customized solutions, please contact us for technical support.

    Frequently Asked Questions (FAQ)

    How does a self-sealing filter work in medical devices?
    The filter allows air and gases to vent freely. However, once it comes into contact with aqueous liquids or blood, the raw materials react to create an instant self-sealing barrier, stopping any liquid from escaping or spilling.
    What materials are used to manufacture these self-sealing filters?
    They are primarily manufactured using Ultra-High Molecular Weight Polyethylene (UHMW-PE) as the main raw material, blended with functional additives such as fluorinated ethylene propylene and polyurethane.
    Can the size and filtration accuracy of the filters be customized?
    Yes, we support complete customization. Filtration accuracy can be adjusted between 0.2 to 15 μm, and dimensions can range from 3.6 mm to 20 mm in diameter, using various materials like PTFE or titanium.
    Are these filters compliant with international medical standards?
    Absolutely. The entire production process is carried out in cleanroom facilities that meet strict ISO medical standards, and select models have passed FDA certification to ensure biocompatibility and safety.
    What is the typical working pressure limit for these filters?
    Our self-sealing filters can withstand working pressures exceeding 50 kPa, with specific high-performance models capable of handling pressures over 70 kPa, providing excellent liquid barrier reliability.