Tooling design review is one important step in the process that will help determine what type of gating system is right for your device. Here are four quick tooling design tips for injection molding with Tritan:
- Proper gating selection
Select a compatible gating style for the selected resin. Most conventional cold gating styles work well with Tritan copolyesters, including sub, pin, fan, edge, sprue, and diaphragm gates.
- Design tooling with good cooling/thermal control
Copolyesters require good thermal control throughout the cavity for optimal processing.
- Design tooling with a plan for venting
Poor venting can result in burn marks and incomplete fill. Suggested vent depths for Tritan copolyesters are typically 0.0005-0.0015 in.
- Design tooling with a plan for ejection
By collaborating with our team from the get-go, you’ll be sure to see greater return on investment for your project in the end. Contact us for processing tips and more!
The need to mitigate infection risks and enhance patients’ safety and comfort has significantly increased the demand for higher-performing plastics with improved chemical resistance. Many polymers commonly used in drug delivery devices simply do not hold up to modern oncology chemotherapies. After exposure to chemicals in the medical environment, devices made with these polymers can experience environmental stress cracking or premature failure in the presence of applied or residual stress.
Broken devices put patients at risk. What's more, regulatory agencies may tell manufacturers to stop using certain materials when device performance or life cycle is compromised.
For these reasons, when you are choosing materials for your medical device, evaluating polymers for chemical resistance is key. Eastman Tritan™ copolyesters have excellent overall chemical resistance and other advantages that make them superior alternatives to polycarbonate (PC) or acrylonitrile-butadiene-styrene (ABS) for oncology drug delivery devices.
Tritan also offers compatibility with many popular sterilization methods and has outstanding hydrolytic stability. This balance of properties makes Tritan a great choice for IV system components, blood therapy devices, and any parts that face frequent disinfection. Read more about the benefits Tritan offers devices that encounter hospital disinfectants and oncology drugs here.
Eastman Tritan™ copolyester is raising the bar for durability and cleanability in medical devices and housings. BPA-free Tritan’s attributes include exceptional clarity, toughness, improved heat and chemical resistance, and more. It’s also easy to process due to its unique chemical makeup relative to traditional thermoplastics. This blend of processing and performance properties provides greater advantages compared with other commonly used polymers. Available in clear and opaque formulations, Tritan offers many benefits to enhance innovative device designs:
Clear formulations of Tritan
- Greater toughness, heat resistance, processability, and design freedom
- Clarity, color stability, and functional integrity after sterilization
- Outstanding chemical resistance to lipids, IPA, disinfecting agents, and bonding solvents and adhesives
Opaque formulations of Tritan
- Excellent functionality and reliability for device housings
- Compatibility with aggressive disinfection and the daily impact stresses that come with greater portability
- Color and functionality following sterilization with gamma and e-beam irradiation
- Reliable color matching
- Flame-retardant properties (Tritan MXF121 copolyester)
- Fire retardant—UL 94 V-2 rating @ 1.5 mm
- Excellent resistance to chemicals and lipids
- Meets hospital Environmentally Preferable Purchasing (EPP) guidelines—made without halogens or ortho-phthalate plasticizers
- Clear and opaque formulations—color matching available
- Excellent durability—high impact strength and toughness
- Fast cycle times
Check out the Tritan Medical Toolkit to learn more about the advantages of Tritan for different molded parts.
We’re excited to share our industry-leading products and technical expertise at Medical Design & Manufacturing (MD&M) West next month in Anaheim, California. We hope to see you there!
Tuesday, February 5, 11:45 a.m.–1:00 p.m., 212AB
Uncovering medical device failure modes and infection transmission pathways to inform better material testing methods, selection, and design: A panel discussion
Wednesday, February 6, 11:45 a.m.–1:00 p.m., 212AB
Meet one on one with members of our medical device and packaging teams at these sessions:
Thermoplastic Elastomer Powder and Its Benefits in Printing Medical Devices
Thursday, February 7, 9:15–10:00 a.m., 208B, Carolin Vogel
Choosing the Right Polymers for Superior Manufacturing and Durability: What Hospitals Measure
Thursday, February 7, 10:15–11:00 a.m., Ellen Turner, Thomas Meehan
Eastman will be exhibiting at Medical Design & Manufacturing (MD&M) West, Feb. 7–9, in Anaheim, California. Join us!
Visit our booth to speak one on one with an Eastman representative. Members of our medical devices team, including Ellen Turner, global market development manager, and Thomas Meehan, specialty plastics technical support, will be on hand to discuss plastic testing, selection, and design. Or attend one of our Lunch and Learn events to learn more about advancements in rigid medical packaging and medical devices.
Check out the conference schedule to start planning your time at MDMW 2019 today. We hope to see you there!