Rubber refers to a material that is capable of recovering from large deformations quickly and forcibly, and can be, or already is, modified to a state in which it is essentially insoluble (but can swell) in a boiling solvent such as benzene, methyl ethyl ketone or ethanol toluene azeotrope.
"Rubber" is in the NAICS Code "316211"
(Rubber and Plastics Footwear ManufacturingOvershoes, plastics or plastics soled fabric upper, manufacturing)
"Rubber" is in the CPC Code "27992"
Rubber thread and cord, textile covered; textile yarn and strip, impregnated or covered with rubber or plastics