This zipper is really weird... — Transcript
Full transcript
- 0:00So, this is a type of flexible plastic
- 0:01called TPU. What's this?
- 0:03>> [snorts]
- 0:04>> Now, it's rigid. It's cool, isn't it?
- 0:06It's called a Y zipper. It was invented
- 0:08by William Freeman at MIT in 1985, but
- 0:12at the time it was hard to manufacture.
- 0:14Only recently, another team at MIT have
- 0:17figured out how to make this thing using
- 0:193D printing. It uses the same principle
- 0:21as a regular zipper. See how these teeth
- 0:24interlock? But, each strip has teeth on
- 0:27both sides so that you can arrange them
- 0:30in a triangle like this. And it's clever
- 0:34the way that there's a kind of step down
- 0:37on each one. So, the top one from one
- 0:41side interlocks with the bottom one from
- 0:43the other side. And so, when you zip it
- 0:46up, it creates a triangular
- 0:49cross-section rod, which gives it a lot
- 0:53of strength.
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