From the Sector

At the upcoming Plastics Recycling Show Europe in Amsterdam on May 5–6, BB Engineering will present its portfolio of PET recy-cling technologies. The German machinery manufacturer will once again focus on textile recycling and melt filtration.

Versatile Portfolio with a Focus on Textiles
The company’s product portfolio includes components and sys-tems for the production of films and synthetic fibers, as well as for PET recycling. With extruders, various filters, and complete spin-ning and recycling plants, the company possesses extensive ex-pertise in plastics processing and can offer comprehensive PET recycling solutions from a single source. Based on its experience in the synthetic fiber industry, BB Engineering places a special fo-cus on textile recycling (PET). BB Engineering will highlight its VacuFil® and COBRA® systems at PRSE.

VacuFil® Visco+ - PET LSP recycling 
The VacuFil® PET recycling plant combines gentle large-area fil-tration with precise IV adjustment, thereby ensuring consistently outstanding rPET melt quality. 

From bottle-to-bottle to 100% fiber-to-fiber: Thanks to its modular design, VacuFil® can be exactly tailored to individual requirements. A wide variety of PET feedstocks — such as flakes, textile waste, fiber waste, or start-up lumps — are processed reliably, while the IV is specifically adjusted to the desired end product.

At the heart of the system is the patented Visco+ component. Us-ing liquid-state polycondensation, it reliably removes volatile con-taminants and delivers an exceptionally homogeneous melt with a viscosity of ±0.01 dl/g — up to 50% faster than comparable LSP systems. Depending on the throughput, a viscosity increase of up to 30% can be achieved. 

Continuous process monitoring via an online viscometer ensures a stable and reproducible output. VacuFil® has a capacity of 150 to 4,000 kg/h.

COBRA® sets new standards in melt filtration
With the development of its latest melt filter COBRA® BB Engi-neering has created a clear solution to the growing demands of the recycling industry. The goal: to reliably handle even high levels of contamination, simplify filter changes and cleaning, and at the same time significantly reduce operating costs. 

The result is a high-performance system that combines continuous large-area filtration with automated, chemical-free intermediate cleaning. Two filter cartridges with automatic switching ensure stable, safe, and uninterrupted operation — even at high contami-nation levels where conventional candle filters or screen changers reach their limits.

A key advantage lies in the integrated cleaning system: it signifi-cantly extends the service life of the filter media while simultane-ously reducing operational effort, melt losses, and energy con-sumption — all without the use of chemicals. This not only en-hances process reliability but also sustainably lowers operating costs.

Thanks to its high flexibility, COBRA® is suitable for both coarse and fine filtration. In addition to its use in PET recycling, the sys-tem also offers great potential for increasing efficiency in other ap-plications, such as plastic spinning, and can be easily retrofitted there.