What exactly is the fiberglass material used in mobile phones?
Many years ago, we at 3C Life mentioned in our content that the widespread adoption of 5G and the emergence of wireless charging technology directly "killed" the metal body design of smartphones.
After that, the choice of materials for smartphone casings became quite "binary." For example, low-end models used plastic frames with plastic bodies, while high-end models mostly used metal frames with glass bodies to pursue a better visual and tactile experience.
Of course, during this process, there were also "minority" options such as vegan leather, ceramic, and wood veneer. However, they mostly had insurmountable drawbacks (e.g., vegan leather is not durable, ceramic is heavy and fragile, and wood can crack), so they ultimately failed to replace glass as the consensus for "high-end models."
However, in the last two years, we've noticed that some models that previously had plastic casings in every generation have upgraded to metal frames and glass back covers with each new generation. But at the same time, for high-end flagship models, it seems that they no longer advertise the specific generation of "special glass" used in their bodies.
Why is this? On the one hand, it's fair to say that the technology related to special glass used in mobile phone casings may have reached a certain "limit," making it difficult to expect them to continue being upgraded annually to meet "marketing demands."
On the other hand, a seemingly more advanced material technology is quietly becoming a new choice for the casing (especially the back panel) of more and more mobile phones.
So what exactly is this "new material"? Indeed, this is a very paradoxical question. Previously, on the official websites of major mobile phone manufacturers, flagship phones would often state that they used "XX glass" as the back cover material. Regardless of the qualifier in the "XX," everyone could immediately tell it was a type of glass.
However, now different brands have adopted different marketing strategies for this "new material." For example, some brands choose to avoid discussing its material properties, while others choose to "invent" a term of their own for promoting this "new material." Only a very few brands will clearly state the original properties of this "new solution" on their official websites.
In fact, this is fiberglass reinforced composite material, so the above practices are not surprising.
Why has glass fiber reinforced composite material been chosen as the casing solution for today's smartphones? All the references indicate that it possesses both high strength and good elasticity, is much harder than ordinary plastics, and is far less brittle than glass.
If fiberglass reinforced composite material is "so good," why do most manufacturers seem reluctant to actively promote it like they did with special glass in the past?
The reason is actually quite simple. Ion-implanted glass and crystallized glass (artificial sapphire) can still be considered glass, and they are relatively recent technologies that have become widespread in the consumer goods sector. However, fiberglass reinforced composite material is essentially still a "performance-enhanced plastic," and it only entered the mobile phone industry relatively late. But it has appeared so early and is so ubiquitous in everyday life that even if it perfectly meets the industrial design requirements of the latest flagship phones, simply calling it "low-class" does seem a bit beneath its image.
Of course, this doesn't mean the phone's back panel is made of the exact same material as a bus seat, but compared to materials like specialty glass, aramid fiber (Kevlar), and carbon fiber-materials that naturally evoke a sense of luxury-fiberglass reinforced composite back panels objectively suffer from a lack of widespread consumer perception.
Simply put, more than objective physicochemical parameters, consumers sometimes need that touch of "emotional value." Fiberglass reinforced materials happen to be one of those technologies that are undeniably practical, but simply lack a "high-end" image and fail to deliver any emotional value.
When this new material, lacking emotional value, "encounters" high-end products that require scarcity and "identity recognition" to justify their premium pricing, it becomes natural for most manufacturers to adopt a strategy of "using it but not advertising it," or "promoting it under a different name."
