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Note : PEEK is not a Fluropolymer, it is listed only for comparison purposes under high pressure and temperature operating environment.

Item Unit ASTM
Test Method
 PTFE(4F) PFA PCTFE
(3F)		 PVDF
(2F)		 FEP
(4-6F)		 PEEK
Physical

Properties
 Density 　 D792 2.14~2.20 2.12~2.17 2.1~2.2 1.75~2.17 2.12~2.17 1.31
Melting Point oC 　 327 302~310 210~212 170 253~282 340
Tensile Strength Kg/cm2 D638 280~350 320 315~420 400~520 200~320 1142
Elongation % D638 200~400 280~300 80~250 100~300 250~330 20
Compression Strength Kg/cm2 D695 120 - 320~520 600 150 　
Impact Strength Kg*cm/cm D256 16.3 Not Damaged 13.6~14.7 19.6~21.8 Not Damaged Not Damaged
Hardness Rockwell Hardness D782 R25 - R75~95 R100~115 R25 R126
Hardness Shore Hardness D1706 D55 D60 D90 D80 D55 D85
Static Friction Coefficient 　 - 0.05 - 0.25 0.10 . 　
Kinetic Friction Coefficient 　 - 0.10 0.2 0.37 0.39 0.3 0.4
Thermal

Properties		 Heat Conductivity 10-4 cal/cm.
sec.oC		 C117 5.9 6.2 4.7~5.3 3.0 6.0 　
Coefficient of Linear Expansion  10-5 /oC D696 9.9(23~66oC) 12(21~100oC) 4.5~7.0 8.5 8.3~10.5(-73~71oC) 　
Operating Temperature oC 　 260 260 150~180 150 200 300
Electrical 

Properties		 Volume Resistibility .cm D257 >1018 >1018 12*1018 20*1014 >1018 　
Surface Resistibility D257 >1016 >1016 - - >1016 >1013
Insulation Resistibility 1/8”thick
Kv/mm		 D149 16~24 20~24 20~24 10.4 20~24 24
Durability Chemical Resistance 　 D543 Excellent Excellent Good Good Excellent Good
Flammability % D635 Non-Flammable Non-Flammable Non-Flammable 自行消化 Non-Flammable Flame Resistant
Permeability % D570 <0.01 0.03 0.00 0.04 <0.01 0.10

Types of Fluoropolymers and Chemical Resistance Comparison 

Category (Name) Molecule Structure
(Fluorine per molecule)		 Melting Point and Operating Temperature Chemical Resistance
PTFE m.p. 327oC
W.TEMP(MAX) 260oC

Excellent chemical stability; PTFE does not interact with the vast majority of chemicals and solvents. However, it is vulnerable to molten alkali metal. PTFE also interacts with fluorine gas and fluorine compounds, such as CIF3. OF2, under high temperature and high pressure environments
ETFE m.p. 270oC
W.TEMP(MAX) 150oC

Similar to the chemical resistance of PTFE, but easily corroded by nitric acids. Has chemical resistance on par with PTFE, but easily corroded by certain chemicals such as nitric acid.
PCTFE m.p. 327oC
W.TEMP(MAX) 260oC

Highly crystalline, high polymer material, with superior permeability properties. 
PFA m.p. 327oC
W.TEMP(MAX) 260oC

Similar to the chemical resistance of PTFE, with superior mechanical and sanitary properties.
FEP m.p. 327oC
W.TEMP(MAX) 260oC		 Similar to the chemical resistance of PTFE, but has slightly lower operating temperature.
PVDF m.p. 327oC
W.TEMP(MAX) 170oC

Easily dissolved by fuming sulfuric acid, high temperature sulfuric acid, or caustic soda above 100oC; also bloats or dissolves when interacting with strong solvents such as aceton、ketone、DMA, or extremely alkalic primary amine such as n-butylamine.