4 ms·
> And good plastics are plastic in the traditional sense of the word: if you drop them, they'll absorb the force by deforming and then spring back into place.
by CrystalGamma 9y ago
> And good plastics are plastic in the traditional sense of the word: if you drop them, they'll absorb the force by deforming and then spring back into place.
That's not what I was taught plastic meant. I was taught both plastic and elastic materials deform under force, but the elastic ones (not the plastic ones) return to their original form once the force is gone …
- jorvi 9y agoIf you drop an iPhone hard enough it wil dent. Drop a polycarbonate phone: no problem. Windows phone wasn't a great OS, but the Lumia line were absolute tanks.
- dom0 9y agoPC is a very impact resistant material, but you can also form it cold, a bit like mild steel, actually.
- occultist_throw 9y agoSo is nylon. But nylon is hydroscopic, and thus not well suited for electronics applications. I do prefer ABS-PC or ASA for a lot of my more-adverse condition cases. They're much more heat resilient, and chemical/UV resistant in ASA's case.
- dom0 9y agoWell, a great many connectors (even, or rather, especially industrial ones) are made from PA6 or 66 with some glass fiber fill; including the actual contact carriers (if they are a separate part). FR4 is somewhat hygroscopic as well; moisture expansion causes real problems for some applications. Never heard of issues with PA connectors.
- danmaz74 9y ago"Plastic" actually stands for "thermoplastic", meaning they can be easily deformed when hot. At normal temperatures, a thermoplastic material can be pretty elastic.
- ghaff 9y agoIn mechanical engineering, plastic deformation does refer to permanent/non-reversible changes (as opposed to elastic deformation) past the elastic limit. That said, plasticity is more commonly used to suggest malleability.