We have a laundry chute but it drops straight down from the children's
bathroom to the utility room directly below.
It is lined with ordinary hardboard with the "shiny" side facing into
the chute allowing clothes to slide down easily. It's about 450mm by
750mm.
I appreciate that ours has a vertical drop but I think that an angled
chute lined with hardboard would work. Over time I guess that the
hardboard would get shinier!

Moo
'