Arnitel is a polyester copolymer that experiences low creep. It also has high temperature resistance, as well as resistances to oils and chemical attack. Low moisture absorption is another favorable property.
Thermoplastic elastomers (TPEs) is a broad term that refers to rubbers that can be melted.
Hytrel is a polyester that offers good tear and fatigue resistance. It also has high toughness and a broad usage temperature range. Hytrel comes in a wide range of hardnesses.