PCTFE Sheet, Rod, Film & Tube
PCTFE or CTFE (originally known as Kel-F*) has many of the properties similar to other fluoropolymers such as PTFE, FEP or PFA, but is mechanically superior in rigidity (does not deform easily), and has very low gas permeability . Its dimensional stability makes it attractive for use as a component of a structural part where the high temperature and chemical resistance of fluoropolymers is required. PCTFE shows high compressive strength and low deformation under load. However, its relative cost is one of the major considerations in its selection, since it is quite expensive.
With a useful temperature range of -400°F to +400°F (-240 to +204°C) and an outgassing of 0.01% TML, 0.00% CVCM, 0.00% WVR when tested per ASTM E-595-90, PCTFE is the only thermoplastic fluoropolymer with these characteristics that is also suitable for aerospace applications.We have PCTFE available in sheet, rod, film, and tube for all applications.
Characteristics:
- Lower cold flow than other fluoropolymers
- High compressive strength
- Low gas permeability
- Zero moisture absorbtion
+ Numerical rating for flame spread is not intended to reflect hazards presented by this or any other material under actual fire conditions
PCTFE – Poly (chloro trifluoro ethylene) TYPICAL PROPERTIES
Property |
Value |
Units |
Method |
MECHANICAL PROPERTIES |
|||
Tensile Strength |
4860 – 5710 |
psi |
D 638 |
Elongation |
100 – 250 |
% |
D 638 |
Flexural Strength, 73°F |
9570 – 10300 |
psi |
|
Flex Modulus |
200 – 243 x 103 |
psi |
|
Impact Strength, Izod, 23 deg C |
2.5 – 3.5 |
ft-lb/in |
D 256 |
Compressive Stress at 1% deformation, |
1570 – 1860 |
psi |
D 695 |
Density |
2.10 to 2.17 |
gm/cu.cm |
|
THERMAL PROPERTIES |
|||
Coefficient of Linear Expansion |
7 x 10-5 |
K-1 |
|
Melting Point |
410 -414 |
deg F |
|
Thermal Conductivity |
1.45 |
Btu/hr-.ft-deg F |
ASTM C 177 |
Specific Heat |
0.22 |
Btu/lb/deg F |
|
Heat Distortion Temperature, 66 lb/sq.in (0.455 MPa) |
259 |
deg F |
D 648 |
Processing Temperature |
620 |
deg F |
|
ELECTRICAL PROPERTIES |
|||
Dielectric Strength, short time, 0.004” |
3000 |
Volt/mil |
D 149 |
Arc-Resistance |
360 |
sec |
D 495 |
Volume Resistivity, @ 50% RH |
2 x 1017 |
ohm-cm |
D 257 |
Surface Resistivity, @ 100% RH |
1 x 1015 |
Ohm sq-1 |
D 257 |
Dielectric Constant, 1 kHz |
2.6 |
ε |
D150-81 |
Dissipation Factor, @ 1 kHz |
0.02 |
D150-81 |
|
OTHER PROPERTIES |
|||
Water Absorption |
0.00 |
% increase in weight |
D570-81 |
Flame Rating+ |
Non-flammable |
D 635 |
|
Coefficient of friction |
D 1894 |
||
Specific Gravity |
2.10 to 2.17 |
D792 |
|
Moisture Permeability Constant |
0.2 |
g/m, 24 hours |
|
O2 Permeability |
1.5 x 10-10 |
Cc, cm/sq.cm, sec, atm |
|
N2 Permeability |
0.18 x 10-10 |
Cc, cm/sq.cm, sec, atm |
|
CO2 Permeability |
2.9 x 10-10 |
Cc, cm/sq.cm, sec, atm |
|
H2 Permeability |
56.4 x 10-10 |
Cc, cm/sq.cm, sec, atm |
NOTE: The information, recommendations and opinions contained herein is only a guide and is intended solely for your consideration, inquiry and verification. The suitability of any material under specific conditions of application is not guaranteed in any manner. Nationwide Plastics Inc.does not assume legal responsibility for the use of data presented here in any form, under any circumstances, any application, test or communication. Nothing contained herein is to be interpreted as a license or authorization to operate under or infringe any patent.