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Customer Challenge
A global manufacturer of medical cables and interconnect solutions needed a technology to reduce radiated electromagnetic interference (EMI) by shielding cable conductors where the main shield was not enough. Not only was the existing cable creating unintended radiated emission problems, but external radiated energy in the environment was affecting the intended video signals within the cable.
An enhanced cable shielding system was necessary to help produce a more vibrant video signal in the display cable. The customer looked for an enhanced EMI/EMC shielding system to help reduce the radiated emissions from the cable and improve video signal integrity in this application.
Design Requirements
- Cable shielding effectiveness performance of at least 50-60 dB attenuation above 500 MHz
- Available in different diameter sizes to give flexibility in choosing cable sizes
- Available cable grounding techniques
- Easy installation and assembly in the field
- Excellent sealing against contaminants and cleaning solutions in a medical setting
- Ability to support manufacturing globally
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Key Customer Requirements
- Heat shrink tubing must be available in different diameter sizes
- Shrink ratio up to 2:1
- EMI shielding solution needed to be flexible before and after assembly
- No mechanical hardware required for installation
- Excellent EMI shielding and method for ground termination
Solution
Typical off-the-shelf heat shrink tubing provides electrical insulation, mechanical protection, and environmental sealing, and is available in a wide range of diameters and sizes giving the customer ultimate design flexibility. But typical heat shrink tubing cannot provide shielding when electromagnetic interference (EMI) or radio-frequency interference (RFI) is needed.
Parker Chomerics CHO-SHRINK® Conductive Heat Shrinkable EMI Cable Shielding System takes the flexibility of a typical polyolefin heat shrink tubing and adds effective EMI/EMC shielding performance.
In this instance, the customer chose to use Parker Chomerics CHO-SHRINK 1120, which is a commercial grade of conductive heat shrinkable tubing, due to its ease to work with and its EMI shielding ability. CHO-SHRINK 1120 uses a proprietary silver-plated copper coating to deliver reliable EMI shielding effectiveness performance of at least 50-60 dB attenuation above 500 MHz.
Conclusion
Parker Chomerics CHO-SHRINK 1120 commercial grade of conductive heat shrinkable tubing, which uses a proprietary silver-plated copper coating to deliver reliable EMI shielding, was chosen for this application. because it was able to successfully reduce radiated emissions.
In addition, improved video signal integrity was achieved by shielding the intended signals within the cable from unwanted external signals. This produced a clearer video signal in the customer’s video display application.
In addition, CHO-SHRINK 1120 is available in many different diameter sizes and is a flexible, easily installed solution which looks professional after installation, which is what the customer preferred.
CHO-SHRINK sizes are also available that are both inside and outside coated with the silver-plated copper coating as well as conductivity coated connector boots. This aids in producing a ground termination system which can incorporate standard connector boot geometries for ground termination through the connector shell.
Get a Free Sample of CHO-SHRINK
Parker Chomerics' CHO-SHRINK is formulated and manufactured for commercial EMI cable shielding applications to provide a low cost, light weight, 360° EMI shielding for cables, transitions, connectors and terminations. CHO-SHRINK's ease of application reduces assembly costs and provides a reliable, professional looking EMI cable shielding solution for electronic equipment.
Get a Quote Now
Tell us a little bit about your problem and we'll do our best to come up with a cost effective, timely quote to help you get started.
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- choquotes@parker.com
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