Kreyenborg is market leader for PET applications

Even throughout Europe more than 200 filtration systems of Kreyenborg GmbH, Münster are in operation for PET recycling applications.

Hence the manufacturer of components and systems for the plastics- and recycling industry takes a leading position in the market. In processing lines for the production of films and packaging straps made of PET bottle flakes actually in 70% of all cases recyclers prefer a Kreyenborg filter.

No matter whether r-PET pellets or packaging straps as well as thermoforming films shall be produced in a direct extrusion process, Kreyenborg offers a custom-made filtration solution for very application. Thus the company could establish itself as market leader in the field of melt filtration not only in Europe. In Great Britain alone, a very dynamic market for PET recycling, Kreyenborg records both an enormous demand and adequate rates of increase in machine deliveries. Even the trend for processing of PET bottle flakes continues.

"With the production of films and packaging straps our latest screen changer, the V-type, even

evolved into standard", underlines General Manager Jan-Udo Kreyenborg. In 70% of all applications the patented Kreyenborg filters are in operation. The V-type, a newly developed, already multiply field-proven filtration system, is patented by Kreyenborg. With its Power Backflush technology, being unique in the market, this system provides for the most powerful and effective backflushing in the market. It goes without saying that with this system screen change and backflushings are effected without production interruption. Hence this type not only works independently of the system pressure but also absolutely process constantly and fully continuously.

Also with pelletizing of PET - both of virgin material and also of r-PET - Kreyenborg is globally ahead. Everyday, worldwide up to 6,000 tons of PET are produced with an underwater pelletizing system in combination with the CrystallCut® process of BKG Bruckmann & Kreyenborg Granuliertechnik GmbH. CrystallCut® is an innovative process, which has been developed by BKG and which makes use of the latent heat in the interior of the pellets for direct crystallisation. Hence it is not necessary to supply additional energy from outside. With this process PET pellets exit the pellet dryer and are fed onto a so-called vibrating conveyor. The conveyor is divided into several zones. In each zone, circulation of pellets stops them sticking together. A crystallisation degree of up to 40% is achieved. This crystallisation degree is influenceable by different control parameters. Additionally, the crystallisation which is effected from inside to outside with this process, leads to an improved, more homogenous structure of the pellets.