Specifications
Hydrophobic ePTFE membrane is made from pure Polytetrafluoroethylene(PTFE), combined with long duration aqueous repellent capability and optimized porous structure. The hydrophobic naturre of PTFE promises its long-lastiing unwetted status even be kept contacting with water or other normal liquids, and the open porous structure provides a wide range of pore size, 0.02μm to 10 μm, ensuring the retention of bacteria, virus, and particles is always effective while maintaining the excellent gas permeability.
The combinaton of water resistance,air permeability, and particle retention introduces ePTFE into various medical applications involving long-lasting liquid resistance and air venting/gas filtration, based on which ePTFE membrane is compatible with multiple sealing methods,ultrasonic,heat, radio frequency welding, mechanical, and inserting molding, offering customers more possibilities of sealing solutions, given the quality is as marvelous as promised.
Laminated PTFE membranes are widely used as air vent function in medical devices(especially in drug delivery application). Considering the compatibility of materials during welding, could offer PTFE membrane laminated with Polyester, Polypropylene, Polyolefin non-woven substrates. For example, a Eptfe membrane with polyester substrate is more suitable for welding with Acrylonitrile Butadiene Styrene(ABS), Polycarbonate, and Poly(methyl methacrylate) .and for polypropylene, high-density polyethylene, a ePTFE membrane with ployolefin substrate works better. For applications requiring exteme low chemical extractables, low metal ion leachables, long-lasting tolerance with high temperatures, or better compatibility, PTFE without substrate/lamination is more suitable. For example, gas and liquid sampling analysis in the NOISH regulations mostly uses unsupported PTFE because of its high purity and low contamination.