| |
|
|
|
| Compression set |
| |
When using rubber materials for gaskets that will be under compression in heated conditions, the ability of these materials to recover from compression deformation is a crucial consideration. The compression set of silicone rubber is consistent over a wide temperature range, from -60∑ to +250∑C. Although the compression set of typical organic rubbers is relatively low around room temperature, it increases significantly as temperatures rise. Silicone rubbers generally require post-curing. Post-curing and selection of a proper curing agent are particularly recommended when using silicone rubber to make molded items for which low compression set
is desired. |
| Creep properties of rubbers* (temp.: 100∑C) |
 |
| Compression set at various temperatures (test conditions: 22 hours at each temperature) |
 |
| |
Creep is the deformation of a plastic material under constant load. Typically, creep increases as temperature rises. Rubbers that are firm and have greater thermal stability tend to exhibit lower creep values at higher temperatures.
Silicone rubber exhibits less creep than organic rubbers, and is more stable even than fluoro-rubber, which has good heat resistance. |
| |
| |
|
|
