Printing PVDF I've recently extruded some Kyna PVDF plastic and now I'm having the joy of trying to dial in my printer. I'm having some issues and will welcome some pointers. PVDF is a slow extruding plastic so print speeds have to be slow, I already have all speeds at 20 mm/s and non print moves at 80 mm/s. I have a 1:5 ratio geared extruder (all metal hotend) running at 260C. I can get the print to stick well with elmers glue, despite PVDF being in the teflon family, but I'm having the most issues with infill. The infill wants to curl up and out of the perimeter. Has anyone ever experienced this phenomenon with any type of plastic and how did you rectify it? Here's a pic of the issue: s1289.photobucket.com mod_embed_images_loadimage('2726317f12cf48b637bd86f6cd40d9a2', '/forum/thumbcache/3d6/ecd/c9f/9b4/a12/114/9e0/2bb/98e/774/1a_800x400.png', 'http://i1289.photobucket.com/albums/b518/Tyler_Jordison/8489088A-60BF-4DF1-8EB0-B21864756D62_zpst0s0pwbp.jpg', 'https://reprap.org/forum/addon.php?262,module=embed_images,check_scaling=1,url=http%3A%2F%2Fi1289.photobucket.com%2Falbums%2Fb518%2FTyler_Jordison%2F8489088A-60BF-4DF1-8EB0-B21864756D62_zpst0s0pwbp.jpg', 'http://s1289.photobucket.com/user/Tyler_Jordison/media/8489088A-60BF-4DF1-8EB0-B21864756D62_zpst0s0pwbp.jpg.html', 829763, 800, 400, 'Loading image ...', false); PS, I have 100g or more quantities of PVDF to sell if anyone's interested. Thanks for the help! https://reprap.org/forum/read.php?262,829763,829763#msg-829763 Sat, 05 Sep 2026 19:26:53 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?262,829763,830830#msg-830830 Re: Printing PVDF https://reprap.org/forum/read.php?262,829763,830830#msg-830830 runninfarmer Printing Fri, 10 Aug 2018 09:36:51 -0400 https://reprap.org/forum/read.php?262,829763,830648#msg-830648 Re: Printing PVDF https://reprap.org/forum/read.php?262,829763,830648#msg-830648 ...shameless selfpromotion :( :X

Ok, my comment is obsolete, since the spammer got deleted.]]> o_lampe Printing Thu, 09 Aug 2018 02:22:26 -0400 https://reprap.org/forum/read.php?262,829763,830295#msg-830295 Re: Printing PVDF https://reprap.org/forum/read.php?262,829763,830295#msg-830295 That chemical resistance is quite interesting indeed, Im sure ill be pondering its applications.

Could it be recovering from a wipe movement at the end of the last layer that is causing the under extrusion of the inner perimeter?]]> DaGameFace Printing Sat, 04 Aug 2018 22:35:53 -0400 https://reprap.org/forum/read.php?262,829763,830192#msg-830192 Re: Printing PVDF https://reprap.org/forum/read.php?262,829763,830192#msg-830192

Like teflon, PVDF will be good in any wear application. With its low friction and low surface energy, I think it'd work well for plastic on plastic wear. I'm mainly interested in it for its high chemical resistance at high temps. Basically resists any chemical (except strong bases, acetone and other ketones) up to 150C.
]]> runninfarmer Printing Fri, 03 Aug 2018 20:57:18 -0400 https://reprap.org/forum/read.php?262,829763,830156#msg-830156 Re: Printing PVDF https://reprap.org/forum/read.php?262,829763,830156#msg-830156
Can confirm that infill peeling issues can be solved by making the extrusions wider and shorter (ie honeycomb instead of rectilinear) both help in addition to inceasing the infill overlap in your slicer (maybe as high as 40%?)

What would someone use a teflon like printed plastic for? Do its printed properties make a good choice for plastic on plastic wear?]]> DaGameFace Printing Fri, 03 Aug 2018 08:40:32 -0400 https://reprap.org/forum/read.php?262,829763,829830#msg-829830 Re: Printing PVDF https://reprap.org/forum/read.php?262,829763,829830#msg-829830
[www.youtube.com]]]> runninfarmer Printing Mon, 30 Jul 2018 16:16:18 -0400 https://reprap.org/forum/read.php?262,829763,829806#msg-829806 Re: Printing PVDF https://reprap.org/forum/read.php?262,829763,829806#msg-829806 The linear version only sits on the previous layer where it crosses so a lot of the time its bridging. If you try something like honeycomb patern it sits on the previous layer so it should behave like the perimeters.
Obviously doesn't address the fundamental issue but may get you usefull prints.
I tend to print slower with honeycombe as the rapid changes in direction can cause a lot of vibration.]]> MCcarman Printing Mon, 30 Jul 2018 12:10:35 -0400 https://reprap.org/forum/read.php?262,829763,829764#msg-829764 Re: Printing PVDF https://reprap.org/forum/read.php?262,829763,829764#msg-829764
HTH
Olaf]]> o_lampe Printing Mon, 30 Jul 2018 00:03:02 -0400 https://reprap.org/forum/read.php?262,829763,829763#msg-829763 Printing PVDF https://reprap.org/forum/read.php?262,829763,829763#msg-829763


PS, I have 100g or more quantities of PVDF to sell if anyone's interested. Thanks for the help!
]]> runninfarmer Printing Sun, 29 Jul 2018 22:17:06 -0400