DESCRIPTION

™ FEP Resin Products Offer Flexibility

Designed to enhance coatings, melt extrusions, and impregnation, ™ FEP (fluorinated ethylene propylene) resins come in pellet form. They also work with conventional melt-extrusion techniques and injection-, compression-, transfer-, and blow-molding processes.

Processing

A high melt strength and drawdown capacity facilitates the use of large dies and drawdown tooling to increase production rates. Using larger length-over-diameter extruder barrels provides enough residence time at high production rates to melt these high-temperature polymers. Reciprocating screw injection-molding machines are most effective. It's recommended that manufacturers use corrosion-resistant metals for any equipment that may contact molten resin.

The properties of ™ products make it the preferred solution for a host of industrial applications and processing techniques. As industrial manufacturing continues to thrive, the ongoing development of ™ fluoropolymers strengthen and reinforce the industry by:
* Increasing uptime
* Facilitating innovation

Features and Benefits of ™ FEP Resins

™ FEP resins offer excellent chemical resistance and electrical properties while functioning at high service temperatures up to 200 °C (392 °F). ™ FEP resins also provide unique flame resistance and best-in-class low-temperature toughness.
™ FEP is also available as a coating, film, or dispersion.

DuPont FEP 9495 is a melt-processible fluoroplastic resin available in pellet form. It is a copolymer of tetrafluoroethylene and hexafluoropropylene, without additives, that meets the requirements of ASTM D 2116 type II. With a relatively high melt flow rate and excellent electrical properties, ® FEP 9495 has been specifically designed for high-speed extrusion of thin coatings on small-gauge wires for twisted-pair constructions. Table 1 shows the typical property data for ® FEP 9495.

As shown in Table 1, this resin provides the electrical and mechanical properties needed for low voltage applications. In addition, ® FEP 9495 has a higher melt flow rate than most other fluoroplastic resins. This permits higher extrusion speeds and easier processing, making ® FEP 9495 a cost-effective alternative for producing thin-wall extrusions.

® FEP 9495 is designed and made to have improved adhesion to copper wire under specific wireline process conditions, low dissipation factor at high frequencies, and to have significant plate-out resistance in melt extrusion. It is suitable as a solid insulator, and as a foamed insulator when used with an appropriate nucleant in a nitrogen gas injection process.

® FEP 9495 is used when traditional extrusion and molding processes are required for producing products with the superior properties of a fluoroplastic resin. Compared to other thermoplastics, the high melt strength and thermal stability of ® FEP 9495 can be used to improve processing rates. Compared with other fluoroplastics, creep resistance at high service temperatures provides a superior balance and level of end-use properties. ® FEP 9495 combines the processing ease of conventional thermoplastics with many properties similar to those of polytetrafluoroethylene.

Properly processed products made from neat ® FEP 9495 resin provide the superior properties characteristic of fluoroplastic resins: chemical inertness, exceptional dielectric properties, heat resistance, toughness and flexibility, low coefficient of friction, non-stick characteristics, negligible moisture absorption, low flammability, performance at temperature extremes, and excellent weather resistance.

In a flame situation, products of ® FEP 9495 resist ignition and do not promote flame spread. When ignited by flame from other sources, their contribution of heat is very small and added at a slow rate with very little smoke.

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