Colines, Gneuss and ExxonMobil Signature Polymers together for stretch film with recyclate

LDPE/LLDPE film has existing collection systems in many European countries that have been in place for many years to provide this type of material for recycling. However, even LDPE/LLDPE that has undergone extensive mechanical processing, can be difficult to convert into new film on conventional production lines, which is why the companies Colines, ExxonMobil Signature Polymers and Gneuss have joined forces in a project to develop a viable film production process with potential cost savings. In particular, the so-called gels and black dots are disruptive factors that could be minimized with the appropriate materials from ExxonMobil Signature Polymers and a pressure-constant screen changer from Gneuss on a highly flexible cast film line from Colines.

ExxonMobil Signature Polymers´s technical experts have conducted trials using PCR material (Post Consumer Recycle) derived from stretch film in combination with Exceed Tough m 3812 high performance polyethylene and observed a reduction in the size of the larger polymer gels.

A key component in this process was the patented Gneuss RSFgenius self-cleaning screen changer. This fully automatic filtration system renewed the screen surface with no measurable pressure fluctuations and can be adapted to the material in question, with screen finenesses typically ranging from 30 to 75 micron, even during full operation. Colines has demonstrated exceptional flexibility in meeting the individual needs of its customers, not only with the full integration of Gneuss screen changers, but also in terms of fully customizable line set-ups for the production of any type of film.