Omya developed a solution, called Omya Smartfill, that can replace 50-70% of titanium dioxide in mono-layer PET milk bottles with high light barrier.

​

Omya Smartfill has a significant lower carbon footprint than titanium dioxide and reduces energy consumption due to less UV-light reflection.

​

Omya Smartfill provides the same mechanism as it is known from the production of white opaque BOPP labels since decades where minerals are causing in the stretched film micro-voids that make the film appear white. In PET it was so far not possible to use calcium carbonate as it causes polymer degradation. Omya`s innovation is a modification on the mineral surface, that improves the compatibility with PET.

​

Bottles made with Omya Smartfill can be recycled in a closed loop, are NIR detectable and fulfil the requirements of EUBP.