Eastman

Property comparisons

Chemical resistance

Housings molded from Eastman Tritan™ copolyester offer outstanding resistance to lipids, Renalin® sterilant, and a wide range of disinfectants. The improved chemical resistance of Tritan™ also means improved ESC resistance during solvent bonding and other secondary operations.

The following spiral flow pictures highlight the combination of chemical resistance and good flow properties. All test spirals were dipped in Virex® Tb, a common medical disinfectant, demonstrating residual stress can cause cracking in molded parts on exposure to chemicals and disinfectants.

These spiral flow pictures highlight the combination of chemical resistance and good flow properties.  

Chemical resistance with externally applied stress

The following photo demonstrates the excellent ESC resistance of Eastman Tritan™ copolyester. An external stress was applied to the plaques pictured, and then each plaque was exposed to Virex® Tb. Eastman Tritan™ copolyester resists craze and crack initiation and propagation, maintaining the physical integrity of the injection molded part.

ESC Resistance of Eastman Tritan™ 

 

Outstanding impact strength and toughness

Eastman Tritan™ copolyester compares favorably with polycarbonate (PC) for both major toughness metricsand offers significantly greater impact strength than other common thermoplastics (acrylics, styrenics, copolymers thereof, and polyolefins).

Notched Izod Impact Graph Elongation to Break Graph

 

 

Retains clarity, color, and strength after sterilization

Compared with polymers that shift color significantly after sterilizationor become opaque and hazyEastman Tritan™ copolyester provides superior color and clarity retention. See the following photo for an actual comparison of Tritan with lipid-resistant polycarbonate and general-purpose polycarbonate after sterilization.

Color Shift During Sterilization 

 

Tough to beat for processability

Eastman Tritan™ copolyester processes similarly with PC, but with less risk of black speck formationand without requiring an annealing step.

The low residual stress, combined with outstanding chemical resistance of Eastman Tritan™ copolyester, lowers system costs by allowing greater secondary operation flexibility and yield.

© 2019 Eastman Chemical Company or its subsidiaries. All rights reserved.
As used herein, ® denotes registered trademark status in the U.S. only.