Torlon 4435 vs.
Vespel ® SP-21 and BG PEEK (FC30)
Drake
Plastics Ltd. is pleased to add Torlon 4435 to our high
performance Torlon product line. Torlon 4435 is a durable,
economical alternative to Dupont Vespel ® SP-21 and Bearing Grade
PEEK 450FC30. This grade of Torlon offers unmatched wear performance at
high PV's without external lubrication. In addition to its
groundbreaking wear performance, Torlon 4435 offers excellent
mechanical properties, including high strength and heat resistance (see
comparison
chart below).
WEAR PERFORMANCE
In a comparison study conducted by Solvay Advanced Polymers, Torlon
4435 demonstrated outstanding performance under a variety of extreme
velocities and pressures as compared side-by-side to similar high
performance plastics Vespel ® SP-21 and BG PEEK FC30. At low velocity
and high pressure, both the Vespel ® and the PEEK plastics failed while
Torlon 4435 performed quite well:
At medium velocity and medium pressure, Torlon 4435 showed a lower wear
factor than Vespel ® and the PEEK sample failed altogether:
At high velocity and low pressure, the PEEK sample failed, while Torlon
4435 and Vespel ® showed good wear performance ratings:
Although the wear performance of Vespel ® ran a close second to Torlon
4435 in most tests, Torlon 4435 is superior in cost efficiency,
mechanical properties, and versatility. 
| Comparison of
Typical Mechanical Properties |
| |
Torlon 4435 |
|
Vespel ® SP-21 |
|
PEEK 450FC30 |
Tensile Strength, MPa
ASTM D1708 |
107 |
|
62 |
|
141 |
| |
Tensile Modulus, GPa
ASTM D1708 |
9.6 |
|
2.6 |
|
-- |
| |
Elongation, %
ASTM D1708 |
6.0 |
|
5.5 |
|
2.5 |
| |
Specific Gravity, g/ml
ASTM D792 |
1.59 |
|
1.42 |
|
1.48 |
| |
Flexural Modulus, GPa
ASTM 790 |
15.2 |
|
3.2 |
|
8.1 |
| |
Glass Transition Temp, °C
ASTM D3418 |
280 |
|
~360 |
|
143 |
| |
CLTE, µm/m°C
ASTM D696 |
32 |
|
46 |
|
40/126* |
| |
| *Above the Tg |
Vespel ® is a registered trademark ® of DuPont.
|
|
|
|
|
TYPICAL
PROPERTIES OF Torlon® 4435
|
|
Courtesty
of Solvay Advanced
Polymers.
|
|
|
Test
Method(2)
|
Typical Values(1)
|
|
|
Value
|
Units
|
|
|
|
Mechanical
Properties
|
|
|
| Tensile Properties |
|
|
|
|
Tensile Strength
|
|
|
|
|
23°C
|
D 1708
|
110
|
MPa
|
|
135°C
|
D 1708
|
90
|
MPa
|
|
232°C
|
D 1708
|
52
|
MPa
|
|
Elongation
|
|
|
|
|
23°C
|
D 1708
|
6
|
%
|
|
135°C
|
D 1708
|
4
|
%
|
|
232°C
|
D 1708
|
3
|
%
|
|
Tensile Modulus
|
D 1708
|
9.7
|
GPa
|
| Flexural Properties |
|
|
|
|
Flexural Strength
|
|
|
|
|
23°C
|
D 790
|
152
|
MPa
|
|
135°C
|
D 790
|
129
|
MPa
|
|
232°C
|
D 790
|
91
|
MPa
|
|
Flexural Modulus
|
|
|
|
|
23°C
|
D 790
|
14.8
|
GPa
|
|
135°C
|
D 790
|
11.2
|
GPa
|
|
232°C
|
D 790
|
10.3
|
GPa
|
| Other |
|
|
|
|
Notched Izod Impact
Strength
|
D 256
|
43
|
J/m
|
|
Unnotched Izod Impact
Strength
|
D 256
|
219
|
J/m
|
|
Shear Strength
|
D 732
|
60
|
MPa
|
|
Compressive Strength
|
D 695
|
138
|
MPa
|
|
Compressiove Modulus
|
D 695
|
8.5
|
GPa
|
|
Poisson's Ratio
|
|
0.42
|
|
|
|
|
Thermal
Properites
|
|
|
|
Heat Deflection
Temperature @1,82
MPa
|
D 648
|
278
|
°C
|
|
Flammability(3)
|
UL-94
|
94 V-0
|
|
|
Coefficient of Linear
Thermal Expansion
|
D 696
|
14.4
|
10-6
m/m/°C
|
|
Thermal Conductivity
|
C 177
|
0.80
|
W/mK
|
|
|
|
Electrical
Properties
|
|
|
|
Surface Resistivity
|
D 257
|
6x107
|
Ohm |
|
Volume Resistivity
|
D 257
|
2x106
|
Ohm-m |
|
|
|
General
Properties
|
|
|
|
24 h Moisture Absorption
|
D 570
|
0.12
|
%
|
|
Rockwell Hardness
|
D 785
|
62
|
|
|
Density
|
D 1505
|
1.59
|
g/cm3
|
|
|
| 1Actual properties of individual
batches will vary within specification limits. |
| 2Test methods are ASTM unless
otherwise noted. |
|
|
|
