Uhde Inventa-fischer Gmbh

Thyssen Krupp Ag

Heinrich Koch

Martin Hittorff

Christopher Hess

Alexander Pawelski

Balazs Wolf

Gerwin Wiegand

Apparatuses and processes may be utilized for mixing used polyester into a polyester melt. In some processes an intermediate product stream is branched off from an intermediate stage in a virgin polyester production process. The intermediate product stream is then mixed with recycled polyester flakes in a dynamic mixer, where not more than 60% of a melting energy required to melt all the recycled polyester flakes is generated and/or supplied in the dynamic mixer. The mixture produced in this way is fed into a subsequent stage downstream of the intermediate stage and converted up to the desired degree of polycondensation. In this way, it is possible to physically reutilize used polyester or polyester waste.

Apparatus and method for mixing recycling material into a polyester melt

The present invention relates to a drying-/degassing device () for drying or degassing a polyester granulate, which has a temperature-control zone, a cooling zone, an inlet () and an outlet () for polyester granulate and also in addition a separate removal possibility () for removing hot polyester granulate. In addition, the present invention relates to a device for the direct production of molded articles from polyester melts which comprises the drying-/degassing device according to the invention. In addition, the present invention describes a method for the production of molded articles from polyesters.

Drying-/degassing device and also device and method for the direct production of moulded articles from polyester melts

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Kleinmachnow, Germany

Heinrich Koch