Creating strong bonds with LSR technology and Tritan

Medical devices and housings are getting a surge of chemical resistance and impact strength thanks to the integration of new liquid silicone rubber (LSR) technology with medical grades of Eastman Tritan™ copolyester. Momentive’s Silopren LSR 47×9 series provides strong in-mold adhesion with Tritan—without the need for primers.
Clear and opaque grades of Tritan have a lower Tg and require a lower processing temperature than other engineering polymers. Because Silopren LSR 47×9 can cure rapidly at relatively low temperatures, it’s possible to achieve optimal functional performance and efficient processing with Tritan.

This combination is ideal for applications that require properties like handling comfort, waterproofing, durability, and aging stability. Incorporating LSR technology enhances the advantages of Tritan, which include:
  • Outstanding chemical resistance
  • Excellent impact strength and durability
  • Made without bisphenol A (BPA) and halogens
  • Superior noise-damping characteristics

Four steps for testing housing material performance

When exposed to commonly used aggressive disinfectants and drugs, many materials used in medical devices can crack, craze, discolor, and become sticky. Currently, there are no industry standards for evaluating surface compatibility. That's why Eastman developed a 4-step test method based on ASTM standards to better understand why plastics fail and how different plastics perform in the real world.
This simple, easily-repeatable test can help predict the reliability of a material after exposure to harsh cleaners and drugs commonly used in hospital settings. The method uses a 1.5% constant strain jig together with wet patches for applying chemical reagents. Here's how it works:
  1. Select the appropriate jig.
  2. Load flex bars onto jig.
  3. Apply chemicals to the flex bars.
  4. Perform reverse side impact test.




Eastman针对医疗市场的创新产品本周穿越美国东西海岸,从时代广场的广告牌挺进加州的MD&M West展会。体验这一轰动时刻!如要查看即将发布的MD&M West 2018展会简要信息,请浏览我们的Eastman医用聚合物Linkedin页面。

与我们一道参加MD&M West 2018展会!

Eastman将参展 2018年美国西部医疗展 时间:2018年2月6-8日,2401号展位。


UCSF Biomed Shares Medical Device Breakdown

Watch this fascinating conversation with Richard Fechter, a principal developmental engineer at the University of California, San Francisco Medical Center.

Thank You for Asking.

“What is the heat deflection temperature for Eastman MXF221 copolyester?”
Heat deflection temperature (HDT) is the temperature at which a polymer or plastic deforms under a specified load. The HDT of our latest offering, Eastman MXF221 copolyester, is outlined here.
Thermal properties
Deflection temperature  
  在0.455 MPa(66 psi)的压力条件下 ASTM
D 648 
94°C (201°F)
  在1.82 MPa(264 psi)的压力条件下

Tritan on Tour! Sept. 19th, 2017

Liquid silicone rubber technology enhances Eastman Tritan™ copolyesters.

There’s a growing demand in today’s medical market for innovative medical devices and housings that provide a superior combination of chemical resistance and impact strength. Thanks to advancements in liquid silicone rubber (LSR) technology, manufacturers are now able to meet this demand using medical grades of Eastman Tritancopolyester. 
Momentive's Silopren LSR 47×9 series provides strong in-mold adhesion with Tritan™ without the need for primers. This combination is ideal for applications that require properties like handling comfort, waterproofing, durability, and aging stability, including:
  • Respiratory devices
  • Sealing elements
  • Gaskets for joints in housings and hardware
  • Buttons and switches on electronic housings and hardware
  • Vibration reduction
  • Membranes and lenses for electronic device housings

Improving Medical Devices with Eastman MXF221 Copolyester

Eastman’s polymers are the key components used in many medical devices, and we’re constantly innovating our materials to help equipment achieve optimum performance and withstand the ever-changing demands of the health care industry.
Our latest offering, Eastman MXF221 copolyester, is a biocompatible, fully compounded medical grade polymer that is uniquely suited for medical devices and electronic device housings. Developed from Eastman Tritan copolyester, Eastman MXF221 copolyester offers superior chemical resistance to stringent disinfectants and drugs, improved durability, and greater longevity.
Eastman MXF221 copolyester provides many advantages for devices and brands, including:
  • Unsurpassed chemical resistance—Unlike polycarbonate or other polymers that lose their impact strength after contact with harsh disinfectants and chemicals, Eastman MXF221 copolyester can withstand many aggressive disinfectants without cracking, crazing, or hazing.