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Technical Data Sheet
Eastar™ DG021 Glass Filled Polyester

Key Attributes
  • Contact clarity
  • Ease of processing
  • Excellent hydrolytic stability
  • Good chemical resistance
  • Good heat resistance
  • Good toughness
  • Increased modulus or stiffness

Product Description
Eastar™ copolyester DG021 is a glass-reinforced amorphous copolyester that provides increased modulus and strength versus unreinforced versions. Eastar™ copolyester DG021 contains 20% glass fiber as well as a mold release agent derived from vegetable based sources. Its most outstanding features are excellent chemical resistance, toughness, heat resistance, contact clarity, ease of processing, hydrolytic stability, and increased modulus or stiffness. These features give molded products improved modulus and strength in applications that are exposed to certain chemicals, aggressive cleaners, and disinfectants. Contact clarity is also advantageous for secondary operations such as laser welding.

Typical Properties

PropertyaTest MethodbTypical Value, Unitsc
General Properties
% Glass Fiber 20
Specific GravityD 7921.37
Mold ShrinkageD 9550.001 mm/mm
Mechanical Properties
Tensile Stress @ YieldD 638100 MPa
Tensile Stress @ BreakD 63896 MPa
Elongation @ YieldD 6383 %
Elongation @ BreakD 6384 %
Tensile ModulusD 6385486 MPa
Flexural ModulusD 7905360 MPa
Flexural Yield StrengthD 790141 MPa
Rockwell Hardness, R ScaleD 785115
Izod Impact Strength, Notched 
     @ 23°CD 25697 J/m
Impact Strength, Unnotched 
     @ 23°CD 4812946 J/m
Optical Properties
Total TransmittanceD 100380 %
HazeD 100372 %
Thermal Properties
Deflection Temperature 
     @ 0.455 MPaD 64881 °C
     @ 1.82 MPaD 64877 °C
Typical Processing Conditions
Drying Temperature 71 °C (160 °F)
Drying Time 6 hrs
Processing Melt Temperature 259-271 °C (498-520 °F)
Mold Temperature 26-38 °C (79-100 °F)

aUnless noted otherwise, all tests are run at 23°C (73°F) and 50% relative humidity.
bUnless noted otherwise, the test method is ASTM.
cUnits are in SI or US customary units.

Properties reported here are based on limited testing. Eastman makes no representation that the material in any particular shipment will conform to the values given.

Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.

2/28/2018 11:35:39 AM