Fluoroplastic PTFE FINE POWDER

PTFE FINE POWDER F500

Get to Know PTFE F500

Everflon™ PTFE F500 is a polytetrafluoroeth-ylene 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 elonga-tion

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 perme-ability, 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 mold-ing, and convoluting.

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 automo-tive 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.

Data List

Property	Test Method	Unit	Typical Value
Particle Size	ASTM D4895	μm	500
Extrusion Pressure at RR = 1500:1	ASTM D4895	Mpa	23
Thermal Instability Index	ASTM D4895		<50
Melting Point	ASTM D4895	°C	327