PHA and BVOH multimaterial printing

Hello All,

I’ve been using colorFabb’s allPHA and and Verbatim’s BVOH, and after messing with the settings I’m able to get proper prints with both materials. The problem starts when I introduce horizontal layers of BVOH sandwiched in between PHA layers like this: (black is PHA white is BVOH)

I can never get them to stick properly, not sure what exactly is causing the delamination, perhaps it’s the PHA wanting to curl and BVOH isn’t strong enough to hold it together?

If i use PLA instead of PHA, there is no problem.

pha settings:

BVOH settings:

print settings:

How can I get them to stick together better? Any help is appreciated!

Thank you,

Renan