To be clear, I’m not asking how to repair it, I’m just trying to understand in general terms why it is so difficult to repair effectively when on paper it seems like typically an easier material to work with than wood or metal (both of which are fairly trivial to repair).
Flagging this post as chemistry because I suspect that’s part of the answer, but it might very well be a physics problem instead.
In: 5
Plastics are made of long chains that are all tangled up together. If you separate or rip them (break it), you can’t really tangle them back up easily.
Think about pulling aparts a cotton ball/pad. It’s also made of fibres that hold together, and if you pull it apart, you can’t put it back together because the fibres won’t just mix back like putty. You’d need to re-mix all of them again from scratch.
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