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iglide® T220 - Material data
Materials table
General features
Unit
iglide® T220
Test method
Density
g/cm³
1.28
Color
White
Max. moisture absorption at 73° F/50% R. H.
Wt.-%
0.3
DIN 53495
Max. water absorption
Wt.-%
0.5
Coefficient of friction, dynamic against steel
µ
0.20 - 0.32
p x v value, max. (dry)
psi x fpm
8,000
Mechanical properties
Modulus of elasticity
psi
261,100
DIN 53457
Tensile strength at 68° F
psi
9,427
DIN 53452
Compressive strength
psi
7,977
Maximum recommended surface pressure (68° F)
psi
5,802
Shore D hardness
76
DIN 53505
Physical and thermal properties
Upper long-term application temperature
°F
212
Upper short-term application temperature
°F
320
Min. application temperature
°F
-40
Thermal conductivity
[W/m x K]
0.24
ASTM C 177
Coefficient of thermal expansion (at 73° F)
[K-1 x 10-5 ]
11
DIN 53752
Electrical properties
Specific volume resistance
Ωcm
> 1010
DIN IEC 93
Surface resistance
Ω
> 1010
DIN 53482
Permitted p x v values
For iglide® T220 plastic bushings with 0.039 inches wall thickness in dry operation against a steel shaft, at 68° F, installed in a steel housing.
iglide® T220 is a special material for application in the tobacco processing industry. It fulfills the demands of the tobacco industry (engineering database). The material is free of undesirable and prohibited ingredients, as required by well-known manufacturers of tobacco products.
Deformation under load and temperatures
Compressive Strength
iglide® T220 plastic bushings can be stressed up to the permitted limit of 6,527 psi. However, the level of the load has an influence on the bushing's wear. The permitted load is limited by higher temperatures.
Maximum recommended surface pressure dependent on the temperature
Temperatures
The bushings made of iglide® T220 can be used continuously up to 212° F. Temperatures up to 320° F are permitted on the short term. The elasticity of the bushing is dependent on the temperature. Even 140° F leads to a clear increase in elasticity. A mechanical fastening should be considered from 140° F upward.
Please contact us if there is any query about the bushing and their application.
Coefficients of friction dependent on the surface speed, p = 108 psi
Friction and wear
As the requirements of the tobacco processing industry was strictly complied with in the development of the material, the application of friction-minimizing additives was limited. Hence the coefficients of friction and wear of the iglide® T220 plastic bushings are clearly behind those of the best iglide® bmaterials.
Wear, rotating application with different shaft materials, load p = 108 psi, v = 98 fpm
Shaft materials
The graph show the results of tests for the wear resistance with different shaft materials. By the observance of the recommendations, the service life of a bushing application can be distinctly improved. The graph shows that with increase in load, the bearing responds with stronger increase in wear. Therefore care should be taken to maintain the loads under 725 psi through adequate dimensioning of the bushing.
Influence of moisture absorption of iglide® T220 plastic bushings
Radioactive rays
iglide® T220 plastic bushings are radiation resistant up to a radioactive intensity of 3 x 10² Gy.