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    Duplex Hydrophilic & Hydrophobic Membranes

    Breathable-3級-海報.jpgCobetter’s Duplex Hydrophilic & Hydrophobic Membranes is typically designed and engineered for the disinfectant or preservative free drip dispenser filtration. The Duplex Hydrophilic & Hydrophobic Membranes is constructed of Hydrophilic PES membrane along with a Hydrophobic PTFE streak, leading to the existence of both hydrophilic and hydrophobic nature within an identical membrane.

    In a disinfectant or preservative free application, usually an eye / nose / wound drop container with a drip dispenser, the hydrophilic nature allows solution flow back and forth through the Duplex Hydrophilic & Hydrophobic Membranes, while the hydrophobic streak remains gas breathable, equalizing air pressure between inside and outside of the container all the time, which is necessary for multiple times of solution dispensing.

    The pore size of Duplex Hydrophilic & Hydrophobic Membranes is 0.22um, for both hydrophilic and hydrophobic parts, resulting in the nature of bacteria repellent of the membrane. The bacteria repellent nature of Duplex Hydrophilic & Hydrophobic Membranes provides that even the last drop of liquid solution, falling back into the container, will be bacterial free. Thus, sterility of the solution will be maintained regardless of the number of times the solution is dispensed and no chemical disinfectant or preservative is required for the solution.

    Certified Biological Safety( ISO10993/USP Class VI )

    Low Drug and Protein Adsorption

    Low Extractables

    Outstanding Flow Rates & Longer Life

    Compatible with Different Sealing Methods

    Ultrasonic, Heat, Mechanical, RF Welding, Inserting Molding

    Sterilization Compatibility

    Autoclave, Ethylene Oxide, E-Beam, Gamma Irradiation

    Available Pore Sizes (μm)


    Typical Applications

    Disinfectant/Preservative Free--Eye Drop & Nose Drop & Wound Drop

    Membrane Formats

    Sheet,  Disc,  Adhesive Backing

    For technical data sheet or application inquiry, you are more than welcome to contact our sales representative by sales@cobetterfilter.com or leave a message