PET compounds

Hi everyone,
I haven't been around quite for a while.
Now I am running some experiments on compounding of recycled bottle PET from
flakes with other plastic materials and mineral fillers. The idea is to
develop a compound which would have better properties like:
- wider "processing window";
- enhanced melt strength and thermal stability;
- lower polymer matrix sensibility towards water (hence pre-drying less
critical) etc.
It does not go well so far. And it doesn't seem there are many people around
doing such things with recycled PET. Does anybody know anything about
success stories in the area?
Happy New Year!
Ole