What is the difference between TPE and TPR?

Thermoplastic Elastomers (TPE), sometimes referred to as Thermoplastic Rubbers (TPR) are causing confusion in many customers. TPE and TPR represent same type of material, which is flexible at room temperature just like rubber but when heated, it can be processed like normal plastic. Though they all indicate same type of material, it is more popular to use TPE instead of TPR when referring.