On Fri, 12 Feb 2016 09:26:45 -0800 (PST), Adam Aglionby
wrote:
On Friday, February 12, 2016 at 4:13:38 PM UTC, T i m wrote:
snipped
No, nor PLA as typically used for 3D printing and 'PLA fibers' as
analysed fairly comprehensively he
http://jimluntllc.com/pdfs/polylactic_fibers.pdf
Thing have discovered experimenting with PCL, AKA Polymorph, moulding not 3D printing , is that it will take enormous amounts of filler.PCL mixed with marble dust is used for short run hydraulic press tools.
That must be tough even if only for short runs.
PLA noodle for printing comes in all sorts of flavours, so shares its lower melting temp sisters ability to take a lot of filling.
http://www.3domusa.com/shop/buzzed-beer-filament/
I'll drink to that. ;-)
Another refernce saying that PLA is UV resistant
http://www.fibersource.com/f-tutor/pla.htm
Yeah, it certainly seem to be more 'UV resistant' than not.
Interesting thing when looking up PLA is all the research seems to have started in last 5 years or so.
I think this whole field is still quite new. You seem to get the core
stuff pretty quickly but the details get filled in later on.
It seems to be where, or maybe a bit later than when I joined the home
computer scene.
Only plastic that 3D hubs are listing as UV resistant is SLS printed nylon.
I don't know if / how it would ... and it would defeat the object to
some degree but I wonder if it (a 3d printed object used outside) was
painted with a UV protective paint would help? Like many cars that had
fibreglass panels from the factory tended to last better than the
gelcoat / self coloured ones?
Wondering if correct choice of filler could help outdoor durability. Like the `space dust` used on flat roofs in sunny zones of the world.
It's possible I guess. 'Doping' to bias it's characteristics for
specific roles.
One for Dennis , annealing PLA to increase strength, is it done normally at all to bake a plastic 3D print to anneal it?
http://www.ncbi.nlm.nih.gov/pubmed/21316612
I think many solid materials, even those 'poured' can often appreciate
that sort of post creation treatment.
Cheers, T i m
p.s. If Dave's parcel shelf brackets are simple in design (and easy to
swap out) I'd be interested to print him some and see how they fare?