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Urethane's Performance Comparison Against Other Materials

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ELASTOMER TYPE
Urethanes
EPDM
Nitrile
Nitrile/PVC
Neoprene
Rubber
Natural Rubber
Hypalon
VIBRATHANE Designation
Castable 8011 6007 6005
Millable Gum* 5004
PERFORMANCE PROPERTY
Relative Importance
Stability of hardness in solvents (resistance to extraction)
5
5
5
4
3
2
4
4
4
4
Swell resistance in nonpolar solvents (oils)
5
5
5
1
4
4
3
1
1
3
Ink pickup
5
5
5
2
5
4
4
2
2
3
 
Tear and abrasion resistance
4
5
4
2
2
2
3
2
3
3
Low heat buildup at high operating speeds
4
3
3
3
2
1
3
1
5
2
Swell resistance in polar solvents (eg. ultraviolet inks)
3
2
3
5
1
1
2
5
5
2
Performance Index
113
112
70
79
65
85
62
82
76
Scaled Performance Index (100=best)
100
99
62
70
58
75
55
73
67
Source: Uniroyal Chemical ®
In this chart, 5 denotes the most important of the properties (under "Relative Importance", and the best-performing elastomers for each property. The Performance Index was obtained for each elastomer by multiplying its performance in each property by the relative importance of that property, and summing. For convience, the Performance Index has been scaled so that the best elastomer (Castable Urethane) scores 100.

* This bulletin describes only castable VIBRATHANE elastomers. For VIBRATHANE millable gum, please see the bulletin VIBRATHANE 5004.

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