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 polyester (PET) sheathing offers a wider and higher bonding range than Polyethylene (PE) sheathing, which renders it more rigid and also allows it to be utilized in higher temperature applications than PE/PET porous media.

Chemical Resistance

PET/PET porous media offers good chemical resistance and may be utilized with many acidic, basic, and organic solvents.

Mechanical Properties

PET/PET porous media offers a more rigid structure than PE/PET media, but it may also be engineered for part softness or rigidity as required for the end-use application. It 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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