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General
description
The ethylene-tetrafluoroethylene (ETFE or F40) is
the copolymer of the ethylene and the
tetrafluoroethylene with the same mole
number. It not only possesses the excellent
anticorrosive performance like the
polytetrafluoroethylene (Teflon), but also
the superior characteristics such as the
high-temperature resistance, abrasion
resistance, radio tolerance, shockproof, and
electrical insulation. It has a 50Mpa
tensile strength, which is twice as the
polytetrafluoroethylene. Meanwhile it
overcomes the non-viscosity of the
polytetrafluoroethylene, and it will
generate powerful adhesion against the
metal. The adhesive force will curb the
thermal expansion and concentration. The
ethylene-tetrafluoroethylene functions as
the suitable material for the anticorrosion
lining because of its superior performance.
Matched by the hot roller coating mould
processes it can be used to manufacture
various anticorrosion components. The hot
roller coating mould process is tailored for
manufacturing the chemical anticorrosive
equipment with complicated structural
impression and multiple connection pipes.
The tremendous adhesive force will make the
anticorrosion equipment with roller coating
lining become the vacuum proof equipment,
and its vacuum may achieve -0.098Mpa. Hence
they can be widely adopted in the
anticorrosion linings of the autoclave,
tower section, storage tank, pump, valve,
filter, pipelines, and pipefittings.
In summary, ETFE is a kind of high-grade
anticorrosion material. All kinds of our
anticorrosion products such as the
anticorrosion equipment, pipelines, and
pipefittings treated by the hot roller
coating process with this material have
excellent characteristics of anticorrosion,
vacuum-proof, shockproof, and
anti-penetration. So it is regarded as a new
generation material in the chemical
industry. The comparisons between the
specific performance parameters and those of
other fluoroplastics are listed in the
following table:
|
Item |
Unit |
ETFE
F40 |
FEP
F46 |
PCTFE
F3 |
PVDF
F2 |
PTFE
F4 |
ASTM
N0 |
|
Specific density |
|
1.73-1.75 |
2.15-2.17 |
2.1-2.2 |
1.76-1.77 |
2.1-2.2 |
D792 |
|
Melting point |
℃ |
265-270 |
285-295 |
212-217 |
170-185 |
327 |
|
|
Tensile strength
23℃ |
Mpa |
41-47 |
19-22 |
30-40 |
50-60 |
17-28 |
JIS K689 |
|
Yield strength
23℃ |
Mpa |
19-22 |
13-15 |
40-45 |
40-60 |
12-16 |
JIS 6891 |
|
Extensibility
2323℃ |
% |
420-440 |
250-330 |
80-250 |
200-300 |
225-600 |
JIS 6891 |
|
Impact strength |
Ft-Ib/in
notch |
Not break |
Not break |
3.0 |
3.5-3.8 |
3.0 |
D256 |
|
Hardness |
|
R-50 |
R-25 |
R-75-95 |
R-110 |
R-18 |
D785 |
|
Friction coefficient |
|
0.20 |
0.20 |
0.18 |
0.21 |
0.09 |
|
|
Linear expansion factor |
1℃ |
9.4×10-5 |
9×10-5 |
10×10-5 |
12-15×10-5 |
10×10-5 |
D696 |
|
Heat conductivity |
W/Mk |
0.251 |
0.184 |
0.0586 |
0.126 |
0.244-0.271 |
C-177 |
|
Combustion rate |
|
Non-
combustible |
Non-
combustible |
Non-
combustible |
Self-
extinguishing |
Non-
combustible |
D635 |
|
Working temperature |
℃ |
180 |
200 |
180 |
150 |
260 |
|
|
Resistance to chemical
attack |
|
Superior |
Superior |
Good |
Good |
Superior |
D543 |
|
Hygroscopic property
23℃ |
% |
0.01> |
0.01> |
0.00 |
0.34-0.04 |
|
D570 |
|
Permeability
O2
N2 |
cc.mil/10
0in2.2hr.atm |
148
45 |
300-900
150-170 |
4-90
1.5-22 |
3.3-4.0
0.9-2.1 |
1050
390 |
D1434
D143 |
|
Dielectric constant
23℃ |
|
2.4-2.6 |
2.1 |
2.5-2.8 |
3-11 |
2.1 |
D150 |
|
Breakdown potential
（Instant
value） |
KV/0.1m
M film |
12 |
12 |
12-13 |
9 |
8-10 |
JIS K6891 |
|
