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JoeLee3DP

Polypropylene and PVA?

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It looks like it's not supported with PVA according to the latest table on the compatibility chart: https://ultimaker.com/en/resources/49799-material-compatibility

PVA only seems to be supported with CPE, PLA, and Nylon. It says TPU, PC, and ABS are considered experimental/use at your own risk, but my impression has always been that PC and ABS do not adhere well to PVA.

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Polypropylene is very chemically resistant because it doesn't interact with most other materials. This is a nice property but also has some downsides:

- It doesn't stick to other polymers (so no PVA)

- It's hard to stick PP to glass, with small prints it's possible but bigger prints need adhesion stickers

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From some practical tests I can say that PP does not stick on PVA as @Tomhe wrote. So forget this combination for large horizontal overhangs or 'islands'. However, I managed to print a small object with PP and PVA support which had well connected PP layers and just needed the PVA as a bed so no PP line hangs on the bottom side.

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