FEP

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Fluorinated ethylene propylene, or FEP, was developed in 1956 as a melt-processable alternative to PTFE and has several distinct advantages, such as the ability to be extruded in long continuous lengths. Applications where FEP is chosen over PTFE are typically those requiring greater optical clarity and flexibility.

FEP heat shrink has a lower recovery temperature than PTFE. FEP has low gas and vapor permeability properties and possesses an excellent UV transmission rating. FEP is also suitable for use in a biomedical setting and is gamma sterilizable.

All of these attributes and more make FEP ideal for a diverse range of applications, from environmental monitoring equipment to medical devices and electronics. Because it is a thermoplastic, FEP is also easily heat-formed, tipped, tapered, flared, and flanged.

Zeus offers a wide range of standard-sized products and precision custom extruded tubing made from fluoropolymers and advanced materials. We manufacture FEP in various custom and stock sizes, including extruded tubing, heat shrink, custom profiles, and multi-lumen tubing. Zeus also offers etching for bonding of these products to other materials, including other plastics.

Learn more about our Value-add services.

Note: The information in the Zeus website, catalog, and other sources presents and discusses generally accepted properties for non-pigmented virgin polymer resins from which Zeus fabricates its line of extruded products. Actual properties may change due to processing method, resin grade, extruded dimensions, and other variables. It is the end user’s responsibility to fully evaluate and test the fitness of the product for their specific application.

Contact our team or call toll-free in the US 1-800-526-3842 or +1-803-268-9500 internationally today to see how we can develop a precision solution to give you a competitive advantage or to request prototyping samples.

  • APPLICATIONS

    Critical Fluid Transfer – The chemical resistance, mechanical integrity, optical clarity, and high maximum temperature of FEP are ideal for critical fluid transfer. FEP is also the outer component of double containment tubing, which has an inner layer of PFA. The FEP layer provides an enhanced barrier for caustic chemical transport.

    Electrical – Because FEP is an excellent insulator, FEP heat shrink is an ideal option to provide electrical insulation while also conferring chemical resistance when shrunk over wires. FEP provides high-temperature protection in caustic environments. As a heat shrink, FEP is also a good splicing aid for designed applications or repairs in the field.

    Fiber Optics – FEP products are frequently used to house and protect delicate optical fibers while maintaining high flexibility. FEP tubing can be formed into shapes and multi-lumens to allow multiple pathways within a single tube through which fiber optics can be passed.

    General Industrial – This material’s durable yet clear nature makes FEP heat shrink an optimal choice for light bulb encapsulation. FEP’s UV rating means it can withstand UV exposure and not degrade or break down. FEP’s temperature tolerance protects it from melting even when bulbs become hot. In the oil and gas industry, battery packs and rock core analyses benefit from FEP heat shrink’s clarity and temperature resistance.

    Medical – FEP heat shrink is used as a manufacturing aid to reflow softer materials such as Pebax® or nylon for catheter jackets during catheter construction. FEP tubing can be produced with radio-opaque fillers such as barium to create tubing that is visible under fluoroscopy.

    Wire Harness – As a heat shrink, FEP is commonly used for its dielectric strength in wire harness applications. Convoluted FEP tubing is a flexible conduit that protects wires, cables, and fiber optics from abrasion.

  • PRODUCTS

    Convoluted Tubing – This tubing contains multiple convolutes in series, resulting in a highly flexible and maneuverable tubing material. Commonly called flexible conduit, this tubing is used as a protective covering for wires and fiber optics in critical areas of aerospace, automotive, and general industrial applications where flexibility, clarity, and performance are key.

    Custom Monofilament – FEP monofilament is one of the most lubricious and optically clear monofilaments available. This monofilament is sterilizable and chemically inert.

    Fillers – FEP tubing is available with a number of fillers to tailor your product further to your specific application. Barium can be added to produce radio-opaque tubing that can be illuminated during medical procedures like fluoroscopy. Glass fillers can be added to impart additional abrasion resistance; carbon aids static dissipation that can be present in numerous applications; and pigments are available for color specifications. Additional fillers are available by request.

    Heat Shrink – FEP heat shrink has broad applications, from covering and protecting critical components in harsh working environments to use as a reflow aid during catheter construction.

    Multi-Lumen – Our multi-lumen tubing contains numerous lumens, or “passages,” to create multiple working channels that run the length of the tubing. Multi-lumen tubing is widely used in medical devices such as catheters, electronic devices, and fluid handling applications. We manufacture multi-lumen tubing with tight tolerance capabilities and high quality standards.

  • KEY PROPERTIES

    Biocompatible – FEP has a proven history of use within medical devices. For more information on FEP’s biocompatibility, contact us today.

    Chemically Resistant – FEP is unreactive towards almost all commonly encountered solvents, including acids, bases, or hydrocarbons.

    Excellent UV Transmission Rating – FEP’s UV rating means this tubing can withstand UV exposure and not degrade or break down. The ability of FEP to withstand this type of UV exposure means that it can be used under sterilizing UV light.

    Flame Resistant – FEP tubing is safe to use at elevated temperatures, resists burning, and is UL 94 V-0 compliant.

    High Dielectric Strength – FEP possesses exceptional dielectric strength and thus doubles as an insulating material when used with electrical components.

    High Working Temperature – FEP has a maximum service temperature of 392 °F (200 °C).

    Low Absorption of Solvents – Consistent with FEP’s inert chemical nature, FEP has extremely low absorption of solvents (<1 %).

    Many Preferred Traits Over PTFE – FEP’s lower heat shrink temperature (420 ± 50 °F / 215 ± 10 °C) means that it can be used over components that may not be able to withstand the higher heat shrink temperature of PTFE (650 ± 25 °F / 340 ± 5 °C). FEP heat shrink has a lower gas and vapor permeability than PTFE and is less expensive. FEP is also more flexible than PTFE and has greater optical clarity.

    Melt Weldable and Thermoformable – In heat shrink form, our FEP is fully weldable when heat is applied and is thermoformable.

    More Lubricious Than PFA – FEP has a lower coefficient of friction than PFA, resulting in a highly smooth and non-stick surface.

    Sterilizable – FEP’s temperature tolerance and physical properties allow it to easily tolerate gamma, ETO, e-beam, and autoclave sterilization protocols.

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