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Technical Data Sheet
Eastar™ Copolyester BR303


Applications
  • Oral hygiene

Product Description
Eastar™ BR303 copolyester is a brilliantly clear polymer with excellent impact strength, chemical resistance, and low shrinkage, making it a great choice for toothbrush applications.





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.

This product has been CRADLE TO CRADLE CERTIFIEDTM Bronze, with Material Health Certificate, Platinum.
The CRADLE TO CRADLE CERTIFIED mark is a registered certification mark used under license through the Cradle to Cradle Products Innovation Institute, a nonprofit organization that administers the publicly available Cradle to Cradle CertifiedTM Product Standard which provides designers and manufacturers with criteria and requirements for continually improving product materials and manufacturing processes. The Cradle to Cradle CertifiedTM Product Standard guides designers and manufacturers through a continual improvement process that looks at a product through five quality categories—material health, material reutilization, renewable energy and carbon management, water stewardship, and social fairness. A product receives an achievement level in each category—Basic, Bronze, Silver, Gold, or Platinum—with the lowest achievement level representing the product’s overall mark.

The Material Health Certificate provides manufacturers with a trusted way to communicate their efforts to identify and replace chemicals of concern in their products. For more information about Cradle to Cradle certification and to obtain printable certificates for Eastman copolyesters, visit www.c2ccertified.org. Search for Eastman Chemical Company in Cradle to Cradle Certified Products Registry.



Typical Properties

PropertyaTest MethodbTypical Value, Unitsc
Mechanical Properties
Flexural ModulusD 7901800 MPa (2.6 x 105 psi)
Rockwell Hardness, R ScaleD 785105
Izod Impact Strength, Notched 
     @ -40°C (-40°F)D 25679 J/m (1.48 ft·lbf/in.)
     @ 23°C (73°F)D 256NB
Optical Properties
HazeD 1003<1.0 %
Total TransmittanceD 100392 %
Other Properties
Bio-based Content 0 %
Thermal Properties
Crystallization half time 52 min.
Typical Processing Conditions
Drying Time 6 hrs
Drying Temperature 71 °C (163 °F)
Processing Melt Temperature 249-271 °C (480-520 °F)
Mold Temperature 16-38 °C (60-100 °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.


Comments
Properties reported here are typical of average lots. 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.


6/6/2019 12:16:36 PM