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Technical Data Sheet
Eastman™ MXF221 copolyester

  • Medical equipment
  • Medical housings and hardware
Key Attributes
  • Color retention after disinfection
  • Ease of processing
  • Excellent Notched Izod impact strength before and after disinfection
  • Excellent chemical resistance to a wide variety of hospital disinfectants and wipes
  • Excellent hydrolytic stability
  • Excellent toughness
  • Fast cycle times
  • Fast drying times

Product Description
Eastman™ MXF221 copolyester is an amorphous material. Eastman™ MXF221 copolyester contains a mold release derived from vegetable based sources. Eastman™ MXF221 copolyester has many outstanding features that include excellent toughness, hydrolytic stability, heat resistance, chemical resistance, and melt flowability. Eastman™ MXF221 copolyester has been formulated for medical devices. Eastman™ MXF221 copolyester has passed FDA/ISO 10993 testing for cytotoxicity, skin sensitization, and intracutaneous reactivity.

Typical Properties

PropertyaTest MethodbTypical Value, Unitsc
General Properties
Specific GravityD 7921.19
Mold ShrinkageD 9550.003-0.006 mm/mm (0.003-0.006 in./in.)
Mechanical Properties
Tensile Stress @ YieldD 63847 MPa (6800 psi)
Tensile Stress @ BreakD 63850 MPa (7300 psi)
Elongation @ YieldD 6385 %
Elongation @ BreakD 638132 %
Tensile ModulusD 6381671 MPa (2.42 x 105 psi)
Flexural ModulusD 7901847 MPa (2.68 x 105 psi)
Rockwell Hardness, R ScaleD 785111
Izod Impact Strength, Notched 
     @ 23°C (73°F)D 2561077 J/m (20.2 ft·lbf/in.)
Impact Strength, Unnotched 
     @ 23°C (73°F)D 4812NB
Optical Properties
Total TransmittancedD 100381 %
HazedD 10032 %
Thermal Properties
Deflection Temperature 
     @ 0.455 MPa (66 psi)D 64890 °C (194 °F)
     @ 1.82 MPa (264 psi)D 64876 °C (169 °F)
     @ Thickness 1.5 mmUL 94V2
     @ Thickness 3.0 mmUL 94V2
Typical Processing Conditions
Drying Temperature 88 °C (190 °F)
Drying Time 4-6 hrs
Processing Melt Temperature 240-290 °C (464-555 °F)
Mold Temperature 24-66 °C (75-150 °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.
dThese properties can be modified by adjustment to melt temperature and melt residence time.

Eastman Medical Disclaimer
It is the responsibility of the medical device manufacturer ("Manufacturer") to determine the suitability of all component parts and raw materials, including any Eastman product, used in its final product in order to ensure safety and compliance with requirements of the United States Food and Drug Administration (FDA) or other international regulatory agencies. Eastman products have not been designed for nor are they promoted for end uses that would be categorized by either the United States FDA or by the International Standards Organization (ISO) as implant devices. Eastman products are not intended for use in the following applications: (1) in any bodily implant applications for greater than 30 days, based on FDA-Modified ISO-10993, Part 1 "Biological Evaluation of Medical Devices" tests (including any cosmetic, reconstructive or reproductive implant applications); (2) in any cardiac prosthetic device application, regardless of the length of time involved, including, without limitation, pacemaker leads and devices, artificial hearts, heart valves, intra-aortic balloons and control systems, and ventricular bypass assisted devices, or (3) as any critical component in any medical device that supports or sustains human life. For manufacturers of medical devices, biological evaluation of medical devices is performed to determine the potential toxicity resulting from contact of the component materials of the device with the body. Tests are defined in FDA-Modified ISO-10993, Part 1 ''''Biological Evaluation of Medical Devices''''. Limited testing information for certain Eastman products is available upon request. The Manufacturer of the medical device is responsible for the biological evaluation of the finished medical device. The suitability of an Eastman product in a given end-use environment is dependent upon various conditions including, without limitation, chemical compatibility, temperature, part design, sterilization method, residual stresses, and external loads. It is the responsibility of the Manufacturer to evaluate its final product under actual end-use requirements and to adequately advise and warn purchasers and users thereof.

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. The processing melt temperature and mold temperature refer to the actual resin melt temperature and actual mold surface temperature respectively. Consider overall resin residence time, part shot size utilization and part geometry to set appropriate processing melt temperature and mold temperature in order to minimize IV loss and maximize molded part performance.

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.

1/28/2019 2:26:24 PM