Chemours Teflon™ 640XT X Fine Powder PTFE Resin for Paste Extrusion

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Chemours Teflon™ 640XT X Fine Powder PTFE Resin for Paste Extrusion
Categories:	Polymer; Thermoplastic; Fluoropolymer; Polytetrafluoroethylene (PTFE); Polytetrafluoroethylene (PTFE), Extruded
Material Notes:	Teflon™ PTFE 640XT X is a polytetrafluoroethylene fine powder resin used primarily for paste extrusion. Teflon™ PTFE 640XT X offers the excellent combination of properties typical of Teflon™ fluoroplastic resins. Teflon™ PTFE 640XT X is designed for processing over a wide extrusion reduction ratio range (250:1–5000:1), with excellent performance even at the top of this range. Due to its outstanding transformation characteristics, Teflon™ PTFE 640XT X can be extruded with very low lubricant levels over a wide reduction ratio range, while the extrusion pressure remains low. For example, Teflon™ PTFE 640XT X can be extruded into wire with excellent performance in the reduction ratio range of 1000:1–4500:1 with a single lubricant level of 16% (based on total weight). This means that a single PTFE/ lubricant mixture can be used for many constructions being manufactured in the same size extruder line. Teflon™ PTFE 640XT X is mainly used for insulation of high performance wire and cables, as well as tubing. It is also suitable for other typical applications, such as additives where some properties of PTFE are required. Information provided by Chemours.
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Physical Properties	Original Value	Comments

Specific Gravity	2.159 g/cc	ASTM D4895
Bulk Density	0.525 g/cc	ASTM D4895
Water Absorption	<= 0.010 % @Time 86400 sec	ASTM D570
Particle Size	450 µm	Average; ASTM D4895

Mechanical Properties	Original Value	Comments
Hardness, Shore D	50 - 65	ASTM D2240
Tensile Strength	28.0 MPa	ASTM D1457
Elongation at Break	400 %	ASTM D1457
Flexural Modulus	0.496 GPa	ASTM D790
Flex Crack Resistance	>= 1.00e+6	Cycles MIT Folding Endurance; ASTM D2176
Izod Impact, Notched	3.50 ft-lb/in	ASTM D256
Coefficient of Friction	0.050 - 0.10	ASTM D1894

Electrical Properties	Original Value	Comments
Volume Resistivity	>= 1.00e+18 ohm-cm	ASTM D257
Surface Resistivity per Square	>= 1.00e+18 ohm	ASTM D257
Dielectric Constant	2.1 @Frequency 1e+6 Hz	ASTM D150
Dielectric Strength	18.0 kV/mm @Thickness 0.100 mm	ASTM D149
Dissipation Factor	<= 0.00010 @Frequency 1e+6 Hz	ASTM D150
Arc Resistance	>= 300 sec	ASTM D495

Thermal Properties	Original Value	Comments
Melting Point	326 °C	Second Peak; ASTM D4591
	327 °C	ASTM D3418
	344 °C	Initial Peak; ASTM D4591
Flammability, UL94	V-0
Oxygen Index	>= 95 %	ASTM D2863

Descriptive Properties
Chemical/Solvent Resistance	Excellent	ASTM D543
Detergent Resistance (hours)	24	On grit blast aluminum
	264
	624	On aluminum
Extrusion Pressure (MPa)	22	ASTM D4895. @ RR= 1600:1
	28	ASTM D4895. @ RR= 2500:1
Heat of Combustion	5.1 MJ/kg	ASTM D240
Salt Spray Resistance Coatings (hours)	192	ASTM B117. 5% NaCl at 35 °C (95 °F). On aluminum.
	744+	ASTM B117. 5% NaCl at 35 °C (95 °F).
Thermal Instability Index	=15	ASTM D4895
Weather Resistance (years unaffected)	20	Florida Exposure

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PDU8824 / 268750

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