Tuesday 22 May 2012

Confirmed: the Samsung Galaxy S III is polycarbonate, not plain plastic


Just about every article around has been giving the upcoming Samsung Galaxy S III generally good reviews except for one downside: the casing. Everyone, including us, were convinced that the Galaxy S III was using a plastic case, but we just got word from Samsung that the phone is better than you think. There had been some confusion over the Samsung Galaxy S III casing, but the word straight from Samsung is that the case is in fact made of polycarbonate, not just regular plastic.

The word that we got straight from Samsung was that the Galaxy S III casing is in fact polycarbonate, but we wanted to make sure that mean the entire case, including the battery cover, and it took a bit of time for the confirmation to come back, but here it is direct from Samsung:

What's in a touch? The Samsung Galaxy S III polycarbonate debatePolycarbonate is used on the battery cover. Polycarbonate is lightweight, solid and is already being widely used in the mobile industry. It was chosen as the best material to represent the minimal organic design of GALAXY S III. Using three layers of high quality, pure and clear polycarbonate, not only is the phone’s aesthetic elevated, but the durability and scratch resistance is maximized.

This is a pretty big deal because once you get past the flowery marketing language given by Samsung, the basic fact is that the case is polycarbonate and not plastic.


Polycarbonate is one of those strange "premium materials" because it's not always apparent by sight and touch that it is higher quality. With glass and metal, we know automatically that we're dealing with premium materials. But, polycarbonate can look and feel just like regular plastic, even though it is far stronger and more durable.

From the research we've done, polycarbonate can be as much as 300 times stronger than average plastic. Unfortunately, the hardness scales and various impact resistance scales are different for plastics/polycarbonate, than things like glass or metal, so it's difficult to get measured comparisons of polycarbonate and say Gorilla Glass, aluminum, or the LiquidMetal that Apple is said to be using in the upcoming iPhone. However, we were able to get some numbers that were pretty interesting.

One material that can be measured on the same scale as polycarbonate is the Kevlar fiber that is famously used on the Motorola RAZR. Depending on the type of clear polycarbonate used in the Galaxy S III casing, it should be harder, but possibly not quite as strong as the Kevlar fiber. Clear polycarbonate can have tensile strength in the range of 10,000-10,500, flexural strength between 12,000 and 17,000, and compressive strength around 11,000; meanwhile, Kevlar fiber has a tensile strength around 12,500, flexural strength around 17,000, and compressive strength around 16,000. However, polycarbonate does rate slightly higher on the Rockwell Hardness scale at R118 compared to R115 for the Kevlar fiber, and polycarbonate is also a bit higher on IZOD impact resistance.

Tensile strength and flexural strength are very similar, and determine how much a material can bend before developing localized deformations or breaks in the material. Compressive strength is the measure of a material's ability to withstand crushing force. It's reasonable to expect that polycarbonate won't have the compressive strength or scratch resistance of various metals that can be used in device construction, but it certainly could provide tensile/flexural strength on par with those materials.

So, all in all it looks like the Samsung Galaxy S III will have a much stronger, durable, and scratch-resistant surface than we all expected. It may not be the strongest material available, and given that it still can look similar plastic, it may not be the most visually impressive material available, but it should be better than we expected, and certainly far better than standard plastic. Of course, we know that looks play as big a part in device construction as many other factors, so it remains to be seen if the "plasticky" look of the Galaxy S III can be overcome with the added strength of the polycarbonate casing in the eyes of consumers.
Confirmed: the Samsung Galaxy S III is polycarbonate, not plain plastic 
We told you all that the Samsung Galaxy S III has a case and battery cover that is made of polycarbonate, not just regular plastic, which means the case is much stronger, more durable, and more scratch resistant, even though the case may still look and feel like normal plastic. Probably not to anyone's surprise, there was an outcry by those who stood by the idea that it doesn't matter if it's polycarbonate or regular plastic, because it will still have a similar "feel and look" to plastic. It seems to us that there's a fundamental problem with this line of thinking, which is tied directly to one of our favorite topics: word usage.

We were careful to not lump polycarbonate together with regular plastic despite the fact that polycarbonate is a type of plastic, is because of the general connotation that "plastic" is cheap and flimsy. This is not at all the case with polycarbonate, which we found can be on par with the Kevlar fiber case found on the Motorola RAZR. Trying to lump together polycarbonate and regular plastic is like lumping together the Samsung Galaxy S III and the G1 in the same "smartphone" category. Sure, it's technically correct, but you lose quite a lot of meaning by doing so.

Still, this idea that plastic is cheap and generally bad came through along with the cries that the phone still looks and feels bad. The trouble with making statements like this is that, unfortunately for polycarbonate, not only is the word "plastic" tied to the idea of being cheap and flimsy, but the look and feel of plastic is tied to that idea as well. And, with the rise of polycarbonate, it may be time to reset our definition and ideas about plastics. Polycarbonate isn't just a "fancy name", it's a completely different class of material.

This kind of reset on how we view material is a new and strange idea. Glass and metal have always had the benefit of having associations with strength and beauty, but plastic has not. That's why we wanted to make the distinction between polycarbonate and plastic. The casing of the Samsung Galaxy S III is not the same as the material used on keyboards, mice, game controllers, or remote controls. That's regular plastic, which can certainly be cheap and not feel very nice. But, polycarbonate is no more the same material as that as is Gorilla Glass compared to glass used in a champagne flute.

As ever, it comes down to the question: why? People are certainly allowed their own opinion as to what looks and feels better than something else, but before you judge, just ask yourself, "Why do I feel this way?" Because, there are a lot of things in our lives these days that are made of plastic, so we have a certain idea of what plastic is, how it feels, and what that feeling means. We know that if we drop the remote control on a hardwood floor, there's a good chance that battery cover is going to break, because it's just simple plastic. And, if another device has a similar feel, we may assume the same build quality, and transfer the same biases to that new device.

But, the truth is that polycarbonate is far stronger and far more impact resistant than the plastic found in most consumer electronics. If you drop a Samsung Galaxy Nexus, or if you take the battery cover off too many times, one of the notches may break because that is plastic. The same shouldn't happen with the Galaxy S III, and the polycarbonate is the reason. It may look and feel similar, but that doesn't mean we should think of it as the same as regular plastic. Plastics can cover an extremely wide range of quality, texture, and strength. Plastic is everywhere, but not all plastics are made equal, and that's something we should keep in mind when it comes to polycarbonate.

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