I decided to purchase some sample flexible filament to see if my printer could handle it without any modifications. I decided not to go with the Ninjaflex as I would most likely have to modify my extruder (bowden style) and tube as it might be too flexible. I ended up going with the Sainsmart brand….just purchased some clear off of Amazon.
All I did was turn the heat up a little (205 deg) and slow the speed down to 30mms. No heated bed on my printer…just did my typical glue-stick and I am highly impressed with how my prints came out! I started with just a hexagon shape just to see what would happen and then got more adventurous with an iPhone 6 case. Came out amazing! Ended up going with 3 layers on top and bottom and 2 layers for the shell.
Only problem is, I don’t have an iPhone 6, =( I am sporting the Samsung Note 4 currently (I’m an Android guy at heart) but couldn’t find anything on Thingiverse that looked like a good print for this and it would take me forever to design my own. Going to take these cases in to work and have some co-workers give them a try. Might post an update.