Sling Neck Pad from Foaming TPU (Aero-TPU)

This is a pad for an over-the-shoulder sling.  It is designed to be printed using foaming TPU (Aero-TPU), which provides the perfect mix of support and softness, while allowing for a more pleasing feel against skin.

The design came about after fighting with the included (and thin) neck strap for my sling.  I created the design by utilizing a 3d body model, and sculpting the pad to be a perfect fit to maintain a stable position on the shoulder.

Printing Tips:

The model is for the left shoulder.  Simply mirror the model if you need it for the right shoulder.

Due to the organic shape of the pad, it should be printed using a PLA raft and supports (if possible) for the best quality and ease of removal.  You can use aero-tpu supports, but be prepared to have to cut them off since TPU has some insane layer adhesion.  A multi-tool printer would be best for this result.

Aero-TPU has to be printed VERY slow, and needs to have the correct settings for flow ratio and temperature to get the softness desired.  The example in the photos was printed with Phaetus TPU-Aero in Lilac using a 0.8mm nozzle.  The temp was 260C, and a flow ratio of .58 to achieve a shore hardness of 72A.  I probably could have adjusted to get a softer 66A, but I was happy with the result.  Just be sure to follow manufacturer setting for this stuff, as it's tricky.

I'm including the Fusion file for those that may need to adjust the model (don't judge, I'm just a hobbyist!!).  The step file is what you'd download and put into your slicer, but it will need orientation to get it as flat as possible for best printing.