There are many measurable characteristics of foam. From densities and hardness, to compression set and tear strength, many variables can come into play when selecting the right foam for your application. When it comes to electronics devices, such as smartphones and drones, one of the unique attributes that OEM's look for is impact absorption. Not only do their devices need a high degree of impact protection, it often must be accomplished in very limited space to maintain slim profiles.
One way to demonstrate the impact absorption characteristics of a foam is with a ball drop test. Often for comparison, foam manufacturers will run this test against "competitive" foams which are not designed for shock absorption. While this may demonstrate a marketing "Wow!" factor, it's usually comparing apples to oranges. Sure, they're both foams, but generally designed and sold as performing very different functions.
In the latest video from Aearo Technologies LLC, the manufacturer of E-A-R™ materials such as CONFOR™ foams and ISODAMP™ elastomers, we have a chance to see a true apples to apples comparison: a high speed camera capturing a 55g steel ball falling 50cm onto 1mm thick foams, including a top competitive brand foam designed specifically for shock protection.
To watch this video, as well as other opportunities to learn about shock and vibration engineering, visit the E-A-R™ YouTube Channel.