Its exceptional characteristics include:

  • High temperature resistance

  • High tensile strength

  • Chemical resistant performance

  • And more...

Several grades are available for use in various applications. 

PermaFlex® is a family of thermoplastic elastomers designed in a range of durometers for maximum versatility. Performance-tested, PermaFlex delivers superior results compared to rubber, TPEs and other elastomers. As opposed to cured rubber, PermaFlex can be re-ground and re-molded many times. It processes with less waste and no sulfur pollution. 

MSDS (pdf)

PermaFlex®, and all its grades, is a thermoplastic elastomer, based on copolyester chemistry, also known as COPE or TPE-E. It eliminates the demarcation between rubbers and engineering plastics. It combines the strength and processing characteristics of engineering plastics with the performance of thermoset elastomers, a combination of the most desirable characteristics of rubbers and plastics. This combination provides benefits in processing and productivity for both molders and extruders. It also can be processed by blow molding or rotational techniques.

As a thermoplastic, PermaFlex does not involve the high cost of vulcanization to obtain optimal properties. This polyester-based material offers a consistent performance over its entire operating temperature range, since its properties vary minimally from high to low temperature extremes. PermaFlex polyester-ester technology extends the traditional temperature range of thermoplastic elastomers. 

Basic Properties

A wide range of properties can be created by varying the ratio of soft to hard block and the composition of the soft segment. PermaFlex stays tough as it flexes and recovers, having excellent characteristics as follows:

  • Temperature resistance

  • High tensile strength

  • Impact resistance

  • Wear and tear

  • Abrasion resistance

  • Resistance to weathering, oil and chemicals

  • High permeability resistance to fuels and oils

  • Flexural fatigue endurance

  • UV stability

  • Adhesion compatibility with paints, glues, plastics and metals

  • Creep and compression resistance

  • Excellent moisture vapor transmission rate

  • Dielectric

  • Good tactile and soft touch feel


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