TPU inner tubes- any experience?

[Dogtrousers]

I run tubeless and carry two butyl tubes as a safety measure (I've needed one on one occasion).

Replacing one of the butyl spares with TPU would free up a bit of space in my rack bag I suppose, but it would soon get filled by the ecosystem of random crap that lives in there.

Replacing both would be a bit radical. But in the unlikely event that I ever went touring again I'd certainly throw in a couple as a just in case measure.

 

[silva]

https://www.polyether-factory.com/archives/37522
Buy new shoes with TPU soles, store them in a place with some humidity in the air, check after some months and you find crumbled cake. Yes, new, unused.
I've seen the same with all other products with PU somewhere in it.
Heavy vests with "imitation leather", their entire surface crumbles off, sticky crap everywhere.
Along the road I came across TPU inners several times (because I pick up left behind inners to use these to tie whatever stuff).
The material did like became brittle, you could just "break" off parts, seeing nearly no stretching first.
In the first link it's stated that HTPU was invented to stop it.
Whether current bicycle inner tyres are TPU, or HTPU, or yet another of the family materials, I don't know.