Chemours Teflon® PTFE 7A Granular Molding Powder

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Chemours Teflon® PTFE 7A Granular Molding Powder (discontinued **)
Categories:	Polymer; Thermoplastic; Fluoropolymer; Polytetrafluoroethylene (PTFE)
Material Notes:	Teflon® PTFE white granular molding powders are ideal for molding many different end products and stock shapes. Excellent chemical resistance, electrical properties, high temperature performance, low temperature toughness, plus unique adhesion and flame resistance. Teflon® PTFE granular molding powders are processed by compressing them into a desired shape and heating them at temperatures above their melting point to consolidate the powder. Resin Characteristics: High bulk density. These small particles result in the highest quality electrical and mechanical properties of all Teflon® PTFE granular molding powders. Uses: Large cylinders for making tape or sheet by skiving; large shapes for machining or direct use. Typical properties for Teflon® PTFE Granular Resin: Chemours was formed from former DuPont performance chemicals businesses, including DuPont Fluoroproducts, in 2015.
Key Words:	Polytetrafluoroethylene
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Physical Properties	Original Value	Comments

Specific Gravity	2.16 g/cc	ASTM D4894
Bulk Density	0.460 g/cc	ASTM D4894
Water Absorption	<= 0.010 %	24 hours; ASTM D570
Particle Size	34 µm	ASTM D4894
Linear Mold Shrinkage	0.034 cm/cm	at preform pressure of 35 Mpa; ASTM D4894

Mechanical Properties	Original Value	Comments
Hardness, Rockwell R	58	ASTM D785
Hardness, Shore A	98	ASTM D2240
Hardness, Shore D	50 - 65	ASTM D2240
Tensile Strength, Ultimate	34.5 MPa	ASTM D4894
Elongation at Break	375 %	ASTM D4894
Flexural Modulus	0.496 GPa	ASTM D790
Poissons Ratio	0.46	approaches a limit of 0.50 at higher temperature
Izod Impact, Notched	189 J/m	ASTM D256
Coefficient of Friction	0.050 - 0.10	ASTM D 1894
Coefficient of Friction, Dynamic	0.10	V = 10 fpm; P= 800 - 1000 psi
	0.13	V = 100 fpm; P= 80 - 100 psi
Coefficient of Friction, Static	0.050 - 0.080	500 psi
K (wear) Factor	2500 x 10^-10 in³-min/ft-lb-hr	unlubricated vs. soft carbon steel
Limiting Pressure Velocity	1200 psi-ft/min @Temperature 21.0 - 27.0 °C	at 10 fpm
	1800 psi-ft/min @Temperature 21.0 - 27.0 °C	at 100 fpm
	2500 psi-ft/min @Temperature 21.0 - 27.0 °C	at 1000 fpm
Taber Abrasion, mg/1000 Cycles	8.9	1000 cycles; CS-17F wheel

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	100 micrometers film; ASTM D149
Dissipation Factor	<= 0.00010 @Frequency 1e+6 Hz	ASTM D150
Arc Resistance	>= 300 sec	ASTM D495

Thermal Properties	Original Value	Comments
CTE, linear	112 µm/m-°C @Temperature -100 - 25.0 °C
	124 µm/m-°C @Temperature 25.0 - 100 °C
	220 µm/m-°C @Temperature 25.0 - 300 °C
	790 µm/m-°C @Temperature 20.0 - 25.0 °C	Large volume change in the 18-25°C transition range
Specific Heat Capacity	1.20 J/g-°C @Temperature 40.0 °C
	1.30 J/g-°C @Temperature 150 °C
	1.40 J/g-°C @Temperature 20.0 °C
	1.50 J/g-°C @Temperature 260 °C
Thermal Conductivity	0.250 W/m-K
	0.300 W/m-K @Temperature 20.0 - 260 °C
Melting Point	317 - 337 °C	ASTM D4894
Maximum Service Temperature, Air	260 °C	retains useful mechanical properties
Minimum Service Temperature, Air	-268 °C	retains useful mechanical properties
	-79.0 °C	remains highly flexible
Flammability, UL94	V-0
Oxygen Index	>= 95 %	ASTM D2863

Processing Properties	Original Value	Comments
Processing Temperature	379 - 429 °C	Cure Temperature

Descriptive Properties
20% Hydrochloric Acid Transmission, g/100sq in.	<0.01
50% Sodium Hydroxide Transmission, g/100sq in.	<.01
Acetic Acid Transmission, g/100sq in.	0.41
Acetone Transmission, g/100sq in.	0.95
Acetophenone Transmission, g/100sq in.	0.5
Benzene Transmission, g/100sq in.	0.64
Carbon Tetrachloride Transmission, g/100sq in.	0.31
Chemical/Solvent Resistance	Excellent
Detergent Resist. on grit-blasted aluminum, Hours	624
Detergent Resistance on aluminum, Hours	264
Detergent Resistance on grit-blasted steel, Hours	24
Ethyl Acetate Transmission, g/100sq in.	0.76
Folding Endurance, # cycles, .18-.20 mm	>10^6
Heat of Combustion J/g	5100	ASTM D240
Hexane Transmission, g/100sq in.	0.56
Piperidine Transmission, g/100sq in.	0.04
Red Fuming Nitric Acid Transmission, g/100sq in.	7.5-1.4
Salt Spray Resistance on aluminum, Hours	>744
Salt Spray Resistance on steel, Hours	192
Sulfuric Acid Transmission, g/100sq in.	0.00001
Water Transmission, g/100sq in.	0.4
Weather Resistance	20	Years unaffected in Florida Exposure

**
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PDU900 / 33297

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