| PET(polyethylene
terephalate)
PET
is an unreinforced, semi-crystalline
thermo-plastic polyester derived from
polyethylene terephthalate. Its
excellent wear resistance, low
coefficient of friction, high flexural
modulus, and superior dimensional
stabilty make it a versatile material
for designing mechanical and
electro-mechanical parts.
Because PET has no centerline
porosity, the possibilty of fluid
absorption and leakage is virtually
eliminated.
|
Typical
Property Values
| Physical
Properties |
ASTM
Test Method |
Units |
PET |
| Density |
D792 |
lbs/cu
in.3 |
0.0499 |
| Water
absorption, 24 hours |
D570 |
% |
.10 |
| Mechanical
Properties |
ASTM
Test Method |
Units |
PET |
| Specific
Gravity |
D792 |
g/cu
cm.3 |
1.38 |
| Tensile
Strength at break, 73° F |
D638 |
psi |
11,500 |
| Tensile
Modulus, 73°F |
D638 |
psi |
4
X 105 |
| Elongation
at break, 73° F |
D638 |
% |
70 |
Flexural
Strength,
73°
F |
D790 |
psi |
15,000 |
| Flexural
Modulus, 73°F |
D790 |
psi |
4
X 105 |
| Izod
Impact Strength, Notched, 73°F |
D256 |
ft-lbs/in. |
0.7 |
| Rockwell
Hardness |
D785 |
---- |
R117 |
| Coefficient
of Friction @ 40psi, 50 fpm |
---- |
Static/Dynamic |
0.19/0.25 |
| Thermal
Properties |
ASTM
Test Method |
Units |
PET |
| Heat
Deflection, 264 psi |
D648 |
°F |
175 |
| Melting
Point |
---- |
°F |
490 |
| Coefficient
of Linear Thermal Expansion |
D696 |
in./in./-°F |
3.9
X 10-5 |
| Applicable
Temp. Range for Thermal Expansion |
---- |
°F |
50
- 250 |
| Max.
Serving Temperature for Long Term |
---- |
°F |
230 |
| Flammability |
UL94 |
---- |
HB |
| Electrical
Properties |
ASTM
Test Method |
Units |
PET |
| Volume
Resistivity, 73°F |
D257 |
ohm-cm |
1016 |
| Dielectric
Constant @ 60 Hz, (73°F, 50% RH) |
D150 |
---- |
3.4 |
| Dissipation
Factor, @ 60 Hz, 73°F |
D150 |
---- |
0.002 |
| Dielectric
Strength |
D149 |
V/mil |
400 |
Material
Availability:
Rods:
Diameters 1/4" to 6 "
Length: 10 feet
Plates:
1/4" to 2" thickness inclusive
are 24 X 48 inches
2 1/4 " to 4" thickness
inclusive are 12 X 48 inches
Profiles,
tubes and special sizes are
custom-produced on request
This
information is only to assist and advise you
on current technical knowledge and is given
without obligation or liability. All
trade and patent rights should be observed.
All rights reserved. |
