CTFE (CHLOROTRIFLUOROETHYLENE)
NEOFLON®   KEL-F 81®   PLASKON®

SPECIFICATIONS:

U.S. FEDERAL L-P-385
U.S. MILITARY MIL-P-21470
 MIL-P-46036
 MIL-P-55028 GRADE 1
FDA TITLE 21 CRF 177.1380
ASTM D1430          ASTM D3595
AMS 3645          AMS 3646          AMS 3648          AMS 3649          AMS 3650A

NATURAL COLOUR:
   CLEAR (up to 0.1 inch thick)
   WHITISH TRANSLUCENT (heavier sections)

Unplasticized CTFE, because of the presence of chlorine in the polymer chain, exhibits several differences in properties from those FLUOROPOLYMERS previously discussed. Most important is probably the effect on the useful temperature range. While CTFE can be used at temperatures almost as low as PTFE, FEP and PFA, its maximum continuous use temperature drops off below that of FEP to 390°F. CTFE, like PFA, is melt processible. Electrical insulation properties are good, but not as good as PTFE. With the presence of chlorine, tensile properties are enhanced with only a slight loss of impact properties over PTFE, FEP and PFA. CTFE has very good chemical resistance; is unaffected by all corrosive inorganics including oxidizing acids; but is swelled slightly by halogenated materials. Like the other FLUOROPOLYMERS it is non-flammable, shows no effect from outdoor weathering and sunlight exposure. CTFE posesses a very low water-vapour transmission rate making it an excellent gas and liquid barrier. CTFE, due to its ability to melt, will heat seal to itself. But, like the previous FLUOROPOLYMERS, cannot be bonded to other materials without treatment. This is due to its inertness toward adhesives. CTFE is available with as much as 25% plasticizer, but such products are not used in tube, rod or sheet. CTFE is a very dimensionally stable material with respect to temperature. Its coefficient of linear thermal expansion is only double that of Aluminum and rivals those of many filled polymers. Thus machining tolerances can be held on CTFE more easily than other unfilled FLUOROPOLYMERS.

GENERAL PROPERTIES
  ASTM test Extruded Rod, Sheet and Tube
SPECIFIC GRAVITY   D792 2.15
TENSILE STRENGTH psi D638 5700
TENSILE MODULUS 105 psi D638 2.07
ELONGATION % D638 150
FLEXURAL STRENGTH psi D790 8500
FLEXURAL MODULUS 105 psi D790 1.8
COMPRESSIVE STRENGTH 10% psi D695 5500
COMPRESSIVE MODULUS 105 psi D695 2.0
HARDNESS rockwell R D785 R85
IMPACT STRENGTH (1/2" x 1/2") ft-lb/inch of notch D256 5.0
THERMAL EXPANSION 10-5/°F D696 2.6
HEAT RESISTANCE (continuous in air) °F   400
DEFLECTION TEMPERATURE   D648  
@ 264 psi °F   167
@ 66 psi °F   258
DIELECTRIC STRENGTH v/mil D149 500
DIELECTRIC CONSTANT   D150 2.6
DISSIPATION FACTOR 10-3 D150 2.0
WATER ABSORPTION 24hrs % D570 <0.01
FLAMMABILITY in/min D635 <0.05

PLEASE NOTE:
Values shown in the above table are averages and there will be variances from lot to lot. After selecting a material based upon these values, you must conduct tests specific to your application to be assured the material suits your needs.