Two main synthetic binding fibers are used in the Porex fiber process: bicomponent polyethylene sheath with polyester core fibers (PE/PET), and bicomponent polyester sheath and polyester core fibers (PET/PET). These fibers are utilized to produce wicking media with open-cell pore structures that control liquid volume capacity and fluid transfer rates.

Porex fiber production processes offer a wide assortment of extruded profile geometries and can be engineered to meet various density, permeability, and wicking performance requirements. Porex porous fiber media are available as hydrophobic or hydrophilic, and we offer FDA compliant finishes for use in diagnostic assays, skin applicators, and oral drug dispensers.

In addition to the bicomponent synthetic fiber choices, Porex offers material additive options that may be molded into the fiber media for unique functionality, such as faster absorption, color change, and self-sealing properties.

Key Benefits


Thermal Properties

The polyethylene (PE) sheathing provides good thermal bonding properties that will not deform under normal shipping and storage conditions. PE/PET has lower thermal bonding properties than PET/PET porous media.

Chemical Resistance

PE/PET porous media is highly inert and offers excellent chemical resistance. It may be utilized with acidic, basic, and organic solvents.

Mechanical Properties

PE/PET porous media can be engineered for part softness or rigidity as required for the end-use application. It also offers excellent tensile strength, which is beneficial for product that is supplied on reels and intended for high volume assembly automation.

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