• Excellent heat resistance
  • Wide useful temperature range
  • Very good resistance to hydrocarbon based greases and oils
  • Excellent wear properties
  • High tensile strength
  • Excellent flex memory and flex fatigue


  • Generally higher and more limited hardness range than other TPEs
  • Much lower elastic limit than other TPEs
  • Limited resistance to halogenated solvents and aqueous acids and bases
  • Generally more expensive than other TPEs


Polyether-ester block copolymer thermoplastic elastomers are high performance engineering materials that bridge the gap between cross-linked elastomers and rigid thermoplastics. They exhibit exceptional toughness, impact resistance, load bearing capacity, and low temperature flexibility.

Their creep resistance, flex fatigue resistance, and resilience make them suitable for dynamic applications. Chemical resistance to non-halogenated solvents, oils and greases is very good, even at elevated temperatures.

Copolyether-ester have the widest useful temperature range of all TPEs: from -65 to 285 degrees F (-55 to 140 degrees C). Hardness ranges from 30 to 82 Shore D.

RTP Technologies that can be applied to polyether-ester block copolymer thermoplastic elastomers include: custom colors, specific gravity adjustment, , anti-static and conductivity modification, flame retardancy, and wear resistant lubrication.