Did you mean Tetra Pak?

https://www.tetrapak.com/en-us/sustainability/acting-for-sustainability/carton-recycling

The recycling locations in the US for these is very limited.

https://www.recyclecartons.com/consumer/carton-recycling-locator/

Yes, I meant the TetraPack. What composites can be made on its basis?

Is TetraPack a clone of TetraPak or an entirely different material?

Yes. TetraPak

mistake

Their webpage https://www.tetrapak.com/en-us/sustainability/acting-for-sustainability/carton-recycling suggests the recycled TetraPak is not used for the same food grade function and there is no info on what the recycled materials are used in.

https://www.tetrapak.com/en-us/sustainability/focus-areas/circularity-and-recycling/recycling-initiatives notes polyAl pellets can be made but it is uncertain if there is much market for this. Maybe molding into bathtubs and toilets to replace the heavy ceramics with lighter weight, recyclable, and less expensive forms.

PolyАl granules can be used for wood-polymer composites. I've seen this

Can it be foamed into a building insulation material?

I haven't done any such research. But I think that it is possible if we develop a foaming technology

https://www.ecoplasteam.com/en/

This is a website where ECOALLENE is described

Regards

Beatrice