PFA Dispersion

Get to know Everflon™ PFA Dispersion

Everflon™ PFA D450 is an off-white aqueous perfluoroalkoxy (PFA) dispersion stabilized with a non-ionic surfactant. It is a general-purpose dispersion that can be used to impart some of the unique properties of PFA to end products that would be difficult to make using traditional melt extrusion processes. It can be used to coat or impregnate porous structures or to make thin films. It can be coated and melt bonded to polytetrafluoroethylene (PTFE) resin or used as a hot melt adhesive. The PFA resin in Everflon™ PFA D450 is a melt flowable thermoplastic, providing superior properties typical of fluoroplastic resins: retention of properties after service at 260 °C and useful properties at –240 °C.

Related Products

Everflon™ PFA Dispersion
Everflon™ FEP Dispersion
Everflon™ PTFE Dispersion

Why is Everflon™ PFA Dispersion

• Inertness to nearly all industrial chemicals and solvents • Stability at high temperatures • Excellent dielectric properties • Excellent weatherability • Excellent anti-stick properties


Data List

	Melt Point ASTM D3307	Melt Flow Index ASTM D3307
	315 °C	8~12 g/10min 5kg
	Particle Size ASTM D4441	Solid Content ASTM D4441
	0.25um	50%
	PH of Dispersion ASTM D4441	Brookfield Viscosity ASTM D4441
		15~30 Mpa.s
	9~10


Packaging

	Everflon™ PFA Dispersion is packaged in 25L PE drum with 20kg (44lb) content and 1000L IBC drum with 1250kg content.

Processing Guide

Conventional coating techniques, such as dip, spray, spin, or roller coating, can be used for coating or impregnating high temperature materials with Everflon™ PFA D450. Thin coats, usually less than 5 μm (0.2 mil), are applied to prevent mud cracking as the coating dries. The water is normally removed at 120 °C [250 °F], followed by heating to remove the wetting agent (typically at 250–270 °C [482–518 °F]). Final consolidation is done above the 305 °C (581 °F) melt point. If the Everflon™ PFA D450 is being used as a top coat over a PTFE coated fabric or other parts, the coating must be heated to melt the PTFE (approximately 337 °C [639 °F]) to maximize adhesion. Prolonged heating above 370 °C (698 °F) should be avoided, as this could lead to thermal degradation of the Everflon™ PFA D450 polymer.

Other solid or liquid ingredients can be added to Everflon™ PFA D450 to provide specific processing or finished product behavior.

The details please visit www.everflon.com or refer Everflon Fluoropolymer Dispersions Application Guide.

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.

Storage and Handling

Ammonium hydroxide is used by Everflon™ to set the pH to 9.5–11.0 at the time of shipment. High ambient temperatures can deplete the ammonium hydroxide level and reduce pH.

Declining pH eventually favors bacterial growth, which causes odor and scum. The pH of opened containers should be measured and maintained between 9.5 and 11.0.

High-speed stirring, pumping, or any other violent agitation must be avoided to minimize sheared particles, coagulation, and foaming. Ideally, the dispersion should be conveyed by gravity from storage to processing stations.

Everflon™ PFA D450 must be properly stored to maximize the stability of the dispersion. The PFA particles will settle on prolonged standing and/or on prolonged heating— temperatures above 40 °C (104 °F) should be avoided.

The dispersion must be protected from freezing, which will cause irreversible settling. The optimum storage temperature range is 7–24 °C (45–75 °F). If dispersions are to be stored for extended periods, lower-temperature storage is desirable.

For optimal performance, Everflon™ PFA D450 should be gently mixed or rolled monthly and prior to use.

Storage and handling areas should be clean.Keep dispersiondrums closed and clean to avoid both contamination and coagulation by drying at the liquid surface. High processing temperatures will cause even very small foreign particles to become visible and/or to make defects in finished products.Good housekeeping and careful handling are essential.


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