Sustainability concepts should not end with the certified coffee bean. That’s why Syntegon, film manufacturer TAGHLEEF INDUSTRIES and film extrusion specialist POLIFILM EXTRUSION jointly developed a new PP monomaterial solution for coffee. The solution is characterised by very good barrier properties and convinces with ideal process capability and optimum printability. The result: best aroma and product protection combined with 100% recyclability.
Coffee packaging with its aluminium-containing composite is difficult to recycle. The transfer to more sustainable packaging was made difficult due to the lack of a substitute for a reliable aroma barrier in combination with a suitable sealing film. The polypropylene (PP)-based monomaterial solution from the cooperation project addresses exactly this problem.
While TAGHLEEF INDUSTRIES printable BOPP film EXTENDO has excellent barrier properties, POLIFILMs PP sealing film offers a wide sealing window and an early seal initiation temperature, also known as SIT (Seal Initiation Temperature). The wide sealing window allows larger tolerances in machine settings and thus stabilizes the packaging process. To ensure that the solution can be processed on packaging machines, the POLIFILM developers focused on the minimized SIT of the PP sealing film. This is necessary when using BOPP as an outer layer in order to achieve a sufficiently wide sealing window in the common heat sealing process despite the lower temperature stability compared to conventional PET.
Syntegon successfully processed these both into flow wraps and reclosable stand-up pouches with zipper. By avoiding the use of a further group of materials in addition to the PP used, the resulting packaging can be recognised by recycling machines as PP monomaterial and can be materially recycled without further separation.
For more information please visit www.polifilm.com.