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The information contained in this Success Story is intended to assist you in designing with Rogers’ PORON polyurethane foam materials. It is not intended to and does not create any warranties, express or
implied, including any warranty of merchantability or fitness for a particular purpose or that the results shown on the Success Story will be achieved by a user for a particular purpose. The user should
determine the suitability of Rogers’ PORON materials for each application. The Rogers logo, Helping power, protect, connect our world, and PORON are trademarks of Rogers Corporation or one of its
subsidiaries. © 2016 Rogers Corporation, All rights reserved. Printed in U.S.A. 0216-PDF. Publication #17-310
APPLICATION SUCCESS STORY
Car Manufacturer Improves Rear
Camera Lens Life with Rogers
Rogers PORON® Materials Protect Rear Automotive Camera Lens
CUSTOMER PROBLEM
One of the popular features of new automobiles is the rear mounted camera. It allows the driver to back up, parallel
park and reverse with a clear view of what is behind the vehicle. This significantly reduces the possibility of
collisions and protects the occupants by decreasing the risk of accidents. When a premier auto manufacturer was
testing its vehicle, they discovered water and dust were infiltrating the mounted automotive camera module. The
original design consisted of a plastic housing with an ethylene propylene diene monomer (EPDM) synthetic rubber
gasket. This EPDM gasket material was expected to provide a seal that would prevent dust and moisture from
getting into sensitive camera electronics, even in a wide range of environmental conditions. Unfortunately, the
EPDM gasket material failed during testing. High-speed temperature cycling from -40° to +60°C and salt and fog
exposure caused the EPDM gasket to dry out and crumble, creating the dust problem it was trying to prevent. With
that level of failure, the automobile would have had better luck with no gasket at all.
THE ROGERS SOLUTION: PORON® GASKETS SEAL OUT DUST AND MOISTURE
The high standards of the manufacturer required a gasket material for its automotive camera that would retain its seal
through all types of weather and temperatures. Its compression force deflection (see description) needed to be firm
enough to maintain a seal yet compress enough to prevent damage to the delicate mating components. It also
needed good compression set resistance (see description) so it would not lose its thickness over time. Rogers’
PORON 4701-40 microcellular polyurethane foam material provided excellent conformance. In addition, the
compression set resistance properties ensured it would maintain a seal over the long haul.
RESULT
PORON materials held up under the extreme weather and temperature conditions, outperforming and outlasting the
EPDM gasket materials. The superior properties protected the rear mount camera lens from the elements and also
prevented rattling, making PORON foams the perfect solution for the vehicle manufacturer. Many PORON foams are
available permanently bonded on polyethylene terephthalate (PET) film, an effective fluid barrier. PORON
4701-40-20 foam material also meets various flammability requirements, including MVSS 302 and UL HBF.
Compression Force Deflection (CFD) is defined as the push back force
(in psi or kPA) of the foam when compressed to a specific percentage of the
nominal thickness.
Compression Set Resistance (CSR) is defined as the ability of a
material to resist collapse from the stresses of compression and
temperature over time.