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
- Excellent clarity and color retention after sterilization
- Color match (with certain opaque grades)
- Design flexibility
When choosing a polymer for a medical device, it’s crucial to understand how the material will perform in the real world. Eastman’s 4-step test helps show how plastics hold up when exposed to frequent disinfection, but it’s also important to see how that translates into actual performance in the field.
That’s why we developed the housing drop test. This test can be used alongside the 4-step method to understand how a well-designed device will respond to impact after being disinfected.
Using materials commonly found in electronic medical device housings and hardware, we designed medical device housings with uniform wall thickness, gradual transitions, and smooth corners to help minimize stress. Each molded part was assembled with six screws using a fixed torque.
The devices were then submerged in Virex® TB for approximately two hours. To replicate use in the hospital environment, we dropped each device multiple times from a height of three feet and visually inspected for cracks and breakage.
The results of this test match closely with results from the 4-step test. To see the test in action and learn more about how different material performed, check out this video.
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:
- Select the appropriate jig.
- Load flex bars onto jig.
- Apply chemicals to the flex bars.
- Perform reverse side impact test.
Read our Disinfect with Confidence brochure for more details on each step of the process, and check out this video.
Ultimately, this test should help you confidently choose the best material for your next project.
Learn more about Eastman’s medical grade polymers for medical device housings and hardware at Eastman.com/medicalhousings.
Tritan on Tour took a trip across states to UBM Advanced Manufacturing Expo in Anaheim, CA where Eastman's next-generation polymer for the medical market was showcased to an intrigued crowd. Learn more about the new polymer by visiting http://www.plasticsnews.com/article/20180223/NEWS/180229943/eastman-emphasizes-value-of-disinfectant-ready-polymers.
Our regulatory group stays current with global regulatory changes and makes this information readily available to the market. We provide you with all the necessary regulatory information for the safe use of our polymers, including details on compliance with Food and Drug Administration standards, chemical and mechanical properties, and more.
We also offer premium technical service for all aspects of the molding process, from conception through bringing your product to market. Eastman Design Services capabilities include:
- Part design and existing mold design review
- Mold-filling simulation
- 3-D design
- Structural finite element analysis
- Material characterization/specialized testing
- Stress and failure analysis
We provide material training in design, processing, and secondary operations, as well as on-site support during testing for your existing tooling. We can conduct mold-filling analysis for flow behavior and weld line location, offer shrink rate evaluation, identify cooling capabilities of the mold, and more.
Contact us today to learn more about working with Eastman.