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Technical Data Sheet
Eastar™ Copolyester BR203 Natural


Applications
  • Oral hygiene

Product Description
Eastar™ BR203 copolyester has excellent appearance and is nearly water clear. With superior chemical resistance, it maintains its physical properties and appearance when exposed to aromatic oils. BR203 is specifically formulated to provide the optimal combination of chemical resistance, bristle retention, strength, stiffness, processability, clarity, colorability, and feel for toothbrushes. Under existing United States Food and Drug Administration (FDA) regulations, Eastar™ BR203 copolyester may lawfully be used to make food contact articles which comply with the specifications and conditions of use in 21 CFR 177.1240.

This product has been GREENGUARD INDOOR AIR QUALITY CERTIFIED®.
The GREENGUARD INDOOR AIR QUALITY CERTIFIED® Mark is a registered certification mark used under license through the GREENGUARD Environmental Institute (GEI). GEI is an industry-independent, non-profit organization that oversees the GREENGUARD Certification Program. The GREENGUARD Certification Program is an industry independent, third-party testing program for low-emitting products and materials for indoor environments. For more information about GEI and to obtain printable certificates for Eastman™ Copolyesters, visit www.greenguard.org. Choose Eastman Chemical Company under the Manufacturer category and click search to display a list of our products.



Typical Properties

PropertyaTest MethodbTypical Value, Unitsc
Mechanical Properties
Flexural ModulusD 7901900 MPa (2.75 x 105 psi)
Flexural Yield StrengthD 79067 MPa (9700 psi)
Rockwell Hardness, R ScaleD 785105
Izod Impact Strength, Notched 
     @ 23°C (73°F)D 256370 J/m (7 ft·lbf/in.)
     @ -40°C (-40°F)D 25660 J/m (1.1 ft·lbf/in.)
Optical Properties
HazeD 10030.3 %
Total TransmittanceD 100391 %
Other Properties
Bio-based Content 0 %
Thermal Properties
Crystallization half time 8 min.
Typical Processing Conditions
Drying Temperature 70 °C (160 °F)
Drying Time 3 hrs
Processing Melt Temperature 250-290 °C (480-550 °F)
Mold Temperature 15-30 °C (60-80 °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.


Comments
Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly 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.

6/6/2019 12:16:23 PM