Most vulcanised rubbers change their properties during storage, and can eventually become unuseable, mainly due to excessive hardening or deformation. We therefore recommend the following guidelines should be observed.
The following tables are a guide to the recommended initial and extended storage times, after inspection, of the most commonly used elastomers.
|CODE||NAME||INITIAL STORAGE||EXTENDED STORAGE|
|NR||Natural Rubber||5/7 years||2/3 years|
|IR||Isoprene Rubber||5/7 years||2/3 years|
|AU||Polyurethane||5/7 years||2/3 years|
|NBR||Nitrile||7/9 years||3/4 years|
|HNBR||Hydrogenated Nitrile||7/9 years||3/4 years|
|CR||Neoprene||7/9 years||3/4 years|
|EPDM||Ethylene Propylene||10/12 years||5/6 years|
|FKM||Fluorocarbon||10/12 years||5/6 years|
|VMQ||Silicone||10/12 years||5/6 years|
|FVMQ||Fluorosilicone||10/12 years||5/6 years|
|TFE||Tetrafluoroethylene||10/12 years||5/6 years|
|FFKM||Perfluoroelastomer||10/12 years||5/6 years|
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