Rubber is a material that rapidly and strongly recovers its deformation under large deformation and can be modified (vulcanized).

The modified rubber is substantially insoluble in boiling solvents such as benzene, methyl-ethanone, ethanol-toluene mixtures.

When modified rubber stretches to twice than its original length at room temperature (18~29℃) and kept for a minute. Then, removing the external force, it can recover to less 1.5 times than the original length in a minute, the material with the above characteristics is called rubber.

website： https://www.rubercenter.com/