PTFE F500

Get to Know Everflon™ PTFE Fine Powder F500.

Everflon™ PTFE F500 is a polytetrafluoroethylene fine powder resin used primarily for paste extrusion. Everflon™ PTFE F500 offers the excellent combination of properties typical of Everflon™ fluoroplastic resins:

• Non-aging characteristics

• Chemical inertness to nearly all industrial chemicals and solvents

• Exceptional dielectric properties, stable with frequency and temperature

• Toughness and flexibility

• Low coefficient of friction

• Non-stick characteristics

• Negligible moisture absorption

• Excellent weather resistance

• Service temperature up to 260 °C (500 °F)

• Useful properties at –240 °C (–400 °F)

• Moderate stiffness and high ultimate elongation

Compared with other grades of PTFE fine powder, Everflon™ PTFE F500 is a premium resin that has increased thermal stability, superior flex life, superior stress crack resistance, low permeability, and high clarity.

Everflon™ PTFE F500 is designed for processing at medium to high reduction ratios of 100:1 to 500:1. It is particularly suitable for production of high quality tubing, spaghetti tubing, and wire coating. This grade is also highly suitable for after-processing technologies, such as flanging, welding, blow molding, and convoluting.

Related Products

PTFE Fine Powder F500
PTFE Fine Powder F1000
PTFE Fine Powder F100

Data List

Typical Property Data for Everflon™ PTFE F500 Fluoroplastic Resin

Typical Applications

It is mainly used for tubing installed in demanding applications. It includes high performancearticles, such as reinforced hose requiring the ultimate in reliability and performance in chemical, pharmaceutical, and automotive industry in use with hydraulic fluid, hydrocarbon fuel, or reactive gas. Such applications are, for example, overbraided hoses for fuel assemblies and brake systems.

Processing Guide

Everflon™ PTFE F is extruded using a liquid processing aid such as naphtha. In the paste extrusion process, the powder is mixed with a lubricant aid and then compressed into a cylindrical preform slug under light pressure (1.5–2.0 MPa [220–290 psi]). The preform slug is placed in the cylinder of a paste extruder, where the composition is forced under high pressure through a finishing die to produce beading, tubing, or wire coatings.

After extrusion, the product is a low-density, but coherent, fibrous structure. After removal of the lubricant by heating within the range of 100–300 °C (212–572 °F), the extrudate can be either sintered above its melting point of around 345 °C (653 °F) to produce a void-free PTFE article or calendered and stretched to produce unsintered or semisintered articles.

Precaution

Equipment used to process at melt temperatures should be provided with local exhaust ventilation (LEV) to completely remove all fumes and vapors from the processing area. In addition, care should be exercised to avoid the contamination of cigarettes and other forms of smoking tobacco when using fluoroplastic resins. Before processing any fluoroplastics, read the Material Safety Data Sheet.

Packaging

Everflon™ PTFE F resin is packaged in 20-kg plastic containers. For convenient shipment, orders of 800-kg pallets (40 drums) are recommended.

Storage and Handling

Everflon™ PTFE fine powder resins must be handled carefully to avoid shearing the powder prior to extrusion. Fibrillation by shearing is not reversible, and damaged particles can appear as defects in the finished product. As temperature is reduced below the transition point of 19 °C (66 °F), the powder becomes progressively less sensitive to mechanical damage or compaction in its containers.

Everflon™recommends that powder compacted during shipping and storage be restored to its optimum condition by cooling it for one or two days below 19 °C (66 °F), followed by screening through a 2 to 4.76 mm opening sieve (4 to 10 mesh). Lumps that are retained on the sieve that can be broken up by shaking at temperatures below 19 °C (66 °F)may be used; however, harder lumps that cannot be broken up should be discarded.

All processing steps prior to preforming should be done at reduced temperature, but ambient dew point must be controlled to prevent condensation on the resin. Storage and handling facilities should be clean to avoid any cross-contamination.

The high sintering temperature causes even very small foreign particles to become visible or to cause defects in finished products. Keep resin drums closed and clean.

Everflon™ PTFE F500 for the advanced global market.