Why did you correct to polycarbonate, a narrow category of plastics? Plastics is a very broad descriptor suitable for capturing all kinds of improvements in plastics and I don’t think any zippers are even made from polycarbonate.
Steve Jobs had a beautiful phase 20+ years ago, selling MacBooks made of "the finest German polycarbonate"...
... which at the time, sounded exactly like another great sales pitch from a more elegant age...