On Sun, 04 Feb 2018 15:34:56 GMT
Pete Zahut wrote:

Andy Burns used his keyboard to write :
Pete Zahut wrote:

[...]

They're generally polypropylene (look for a "PP" or a recycling
triangle with a "5" inside) if so, that's a difficult "low surface
energy" plastic to glue, search for e.g. 3M DP8010NS

Brilliant Andy, thanks, there is indeed a PP with a 5 inside the
triangle, so cheers.

I've used hot glue for unstressed joints in those - if it needs to be
stronger then welding might be worth a go. As someone said up-thread,
they do seem to go brittle after a couple of years, even if kept out of
direct sunlight.