“The major application is laminated safety glass for automobile windshields. (...) PVB is also available as 3D printer filament that is stronger and more heat resistant than polylactic acid (PLA).” Possibly this is #PolyCast.
on 02024-07-10The 3D Prima page for #PolyCast says it’s made of “PVB” but doesn’t say what that stands for.
on 02024-07-10#PolyCast product information sheet #PDF says it can be polished with isopropyl alcohol, and that you should avoid using sodium silicate in the ceramic shell, but doesn’t say what’s in it.
on 02024-07-10#PDF of #PolyCast #MSDS, from JF Polymers Suzhou. Warns you to wash your skin thoroughly with soap and water in case of skin contact but only seek medical attention if irritation persists. Also doesn’t say what’s in it.
on 02024-07-10#PDF of #PolyCast filament datasheet for #3D-printing casting molds. Doesn’t say what’s in it. 1.1g/cc, absorbs 2.09% water at 70% RH at 23° with a time constant of about a day, glass transition of 70°, decomposes at 260°, heat deflection at 52.7°–66.5°, 1745MPa±151MPa Young’s modulus, 35.7MPa tensile strength, 5.8% elongation at break, prints at 190°–220°. I wonder if you could anneal it like PLA. Supposedly it’s made of PVB, whatever that is. #materials
on 02024-07-10#3D-printing a casting pattern, the quick and dirty way, using a Prusa I3 MK3S FDM printer, using a plastic called PVB, brand #Polycast, “designed to burn out very cleanly”. Dude is wearing my slogan. Lots of time-wasting talking-head footage. He also mentions you can smooth the prints with isopropanol, and that he was able to glue it that way too. He brushed plaster on the surface of his print so he wouldn’t have to degas his plaster. He recommends casting in Zamak, which he melts in a soup can, rather than aluminum, and using hardware store ductwork sealed with aluminum HVAC tape to hold the plaster. To my surprise he claims Zamak is cheaper than aluminum, and that most plumbing fixtures and towel racks are Zamak, both of which I think are wrong. #manufacturing #bootstrapping #video
on 02024-04-03