Trützschler and EREMA cooperate on inline BCF systems for R-PET After having worked successfully together during the past year, Trützschler and EREMA have signed an agreement on the cooperation in the area of recycled materials, especially of R-PET. The cooperation covers BCF lines which produce carpet yarns by spinning recycled polyester or blends of virgin PET chips and recycled flakes.
The overall spectrum of products offered includes a VACUREMA Basic Line and secondary components from EREMA which feed the inline connected symTTex spin positions of Trützschler Man-Made Fibers with a high quality polymer melt. For cost reasons, recovered secondary raw materials, such as flakes from used PET bottles, have long been a popular commodity in both the plastic and in the fiber industry. Since the quality of the raw material plays a decisive role when spinning thermoplastic polymers, the bottle flakes have to be treated with special care. EREMA’s VACUREMA technology offers modular solutions with a vacuum reactor, a directly connected single screw extruder and a high performance filter for this process step.
The high quality of the melt with respect to viscosity (IV value) and purity lays the foundation for top-quality filaments. The upstream processes have little impact on the directly following spinning process, since only small pressure fluctuations occur during backwashing or screen changes. Trützschler’s R-PET-spinning technology is based on the proven system components for spinning primary chips. The process involves the well-known spin packs and the double shell godets, the HPc-texturing system and the fully automatic winder.
Existing customers will appreciate the use of the same key components for operation of the R-PET plant. The support of process and product development for recycled polyester through process engineering in Winterthur is part of the package. Last year, Trützschler and EREMA jointly developed a carpet yarn plant for BCF yarns from recycled PET on customer demand. While the reactor, the extruder and the polymer filters were delivered by EREMA, Trützschler Man-Made Fibers was responsible for spinning, drafting and winding. The plant is very flexible, so that both yarns from 100% recycled material or blends with PET primary granules can be spun. The BCF yarns are used for various applications.