Porex was a pioneer in the development and manufacturing of porous plastic products. Since our founding in 1961, we’ve enabled manufacturers and companies around the world to create innovative solutions for some of their most challenging design and engineering problems.
Here you'll find just a few of the additional porous materials we work with. If you'd like to learn more about one of these materials, or want to know if a material you currently work with can be made porous, contact us for answers.
Polycarbonate (PC) and many PC alloys such as PC/ABS (acrylontitrile-butadiene styrene) are well known for their outstanding physical properties, especially impact and temperature resistance. This amorphous class of materials can very easily be made flame resistant, and thus finds its way into numerous electronic applications.
Because PC lends itself to a variety of products, properties, and regulatory approvals, it can be matched to meet specific application needs. For example, there are grades that meet NSF potable water standards, ISO 10993 biocompatibility, and UL-94 flame ratings.
Nylon is a semi-crystalline polymer and the trade name for polyamides, a class of polymers that contain amine and carbonyl groups. There are numerous versions; however, nylon 6 has the highest strength and thermal resistance of the nylons with a softening temperature of around 380°F (190°C).
Nylon 6 is rated for continuous use up to 250°F (121°C) with a lower operating temperature at -40°F (-40°C). It has very high tensile strength, good abrasion and chemical resistance, and low coefficient of friction. Most grades have some UL-94 flame rating.
Thermoplastic polyurethane (TPU) is a tough elastomeric co-polymer based on long chain polyol soft segments (usually a polyester or polyether), a diisocyanate hard segment (usually MDI), and a chain extender. Given the variety of components and ratios available, TPU properties and flexibility can be tailored to a broad range of specific applications.
In general, TPU offers outstanding abrasion resistance, impact strength, toughness, and flexibility. Specific grades also exhibit inherent resistance to salt water stress cracking, hydrolysis, and fungal attack, as well as good resistance to fuels and oils.
Polyethersulfone (PES) is generally used in custom applications requiring the combination of good strength and high heat resistance. PES is UL rated for continuous use at 356°F (180°C) and has a UL 94 V-0 flammability rating. The typical pore size of this material is 100 micrometers, but PES can be made in other pore sizes for custom applications.
PES polymers are high-strength and rigid, retaining these properties at -148 to 302°F (-100 to 150°C). They have very good dimensional stability and a high glass transition temperature (365°F / 185°C.) They are highly resistant to mineral acids, alkalis, and electrolytes, in pH ranging from 2 to 13. In addition, PES is resistant to oxidizing agents; therefore it can be cleaned by bleaches. It is also resistant to surfactants and hydrocarbon oils. However, PES is not resistant to low-polar organic solvents (e.g. ketones and chlorinated hydrocarbons) and aromatic hydrocarbons.
Because porous plastic can make an ideal support matrix for active ingredients, Porex can produce numerous composite materials to enhance the performance capabilities of porous plastic. These include but are not limited to activated carbon loading of up to 40% by weight for potable water applications; ion exchange media for separation applications; color-coding additives; self-sealing agents to seal off porous material in contact with liquids or aerosols; surfactant for hydrophilicity; active metal powders or other catalyst; and many other combinations.