<p>I am wondering if anyone can help me achieve a good 3d print using polypropylene. I am trying to print custom insoles for shoes and I'm getting some bad warping/lifting (see image).</p>

<p><a href="https://i.stack.imgur.com/ZKi1R.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/ZKi1R.jpg" alt="example of warping using polypropylene"></a></p>

<p>Some details about the print and process:</p>

<ul>
<li>I have a Prusa i3 Mk2S with a Flexion extruder</li>
<li>I am using what I believe is a good quality filament (Verbatim PP): <a href="https://www.verbatim.com.au/3d-printing/pp-filament/3d-pp-filament.html" rel="noreferrer">https://www.verbatim.com.au/3d-printing/pp-filament/3d-pp-filament.html</a></li>
<li>I am coating my hotbead with clear packaging adhesive (OPP tape) as per the manufacturers instructions. This appears to help quite a bit.</li>
<li>Bed heated to 75 degrees. I tried 100 but got hit with the "Heatbed Thermal Runaway" error which I believe indicates that not enough voltage is getting to the bed heater.</li>
<li>I've tried printing at 220 degrees and 170 degrees.</li>
<li>I've tried enclosing the printer in a makeshift enclosure to reduce the speed that the material is cooling at.</li>
<li>Other settings: speed 40mm/s constant, 0.2mm layer height, 20% infill, 3 top bottom and side layers. </li>
</ul>

<p>The print takes about 5 hours and seems to stay down for an hour or two before starting to warp.</p>

<p>Does anyone have any suggestions of things I should try?</p>

[{'answer_id': 4512, 'author': 'Tom van der Zanden', 'author_id': 26, 'author_profile': 'https://3dprinting.stackexchange.com/users/26', 'pm_score': 2, 'selected': False, 'text': '<p>You should enable the "brim" functionality of your slicer. This adds additional perimeters to the first layer, expanding the base of the model. The larger surface area gives more adhesion.</p>\n'}, {'answer_id': 4523, 'author': 'Davo', 'author_id': 4922, 'author_profile': 'https://3dprinting.stackexchange.com/users/4922', 'pm_score': 2, 'selected': True, 'text': '<p>Try heating your enclosure to 50C, as well as adding a brim.</p>\n'}, {'answer_id': 4566, 'author': 'Stephen Archer', 'author_id': 8150, 'author_profile': 'https://3dprinting.stackexchange.com/users/8150', 'pm_score': 1, 'selected': False, 'text': '<p>One thing that seemed to help is making sure the heated bed was 100C. I was able to do this on my Prusa by turning off the front fan (for the whole print). If I have both the fan on and the heated bed at 100C I get the "Heatbed Thermal Runaway" error.</p>\n\n<p>This produced a print that was better but still a bit warped.</p>\n'}]
['https://3dprinting.stackexchange.com/questions/4508', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/8150/']