Twin-screw extruders enable even contaminated post-consumer polystyrene to be depolymerized continuously and efficiently. This opens up a promising recycling route in terms of industrial implementation via renewed polymer synthesis to produce plastic granules with a quality approaching that of virgin material.

Continuous process in a twin-screw extruder: For industrial implementation of chemical recycling of polystyrene, a reactor technology is required that allows high throughput rates and also processes heavily contaminated post-consumer material continuously with high process stability

A Robust Continuous Process for the Chemical Recycling of Polystyrene

Extrusion

Kunststoffverarbeitung: Verfahren

Polystyrol

Kunststoff Werkstoffe

Thermoplaste

Extrusionsanlagen

Kunststoffverarbeitung: Maschinen und Komponenten

Kunststoff-Recycling

Kunststoff-Aufbereitung

Turning Old into New

The simple replacement of petroleum-based components with renewable alternatives in a well-established reactive extrusion process is a promising route to more environmentally friendly thermoplastic polyurethane elastomers (TPU). However, this requires a comprehensive understanding of the interactions between chemical reactions and material flow within an extruder, as well as a thorough understanding of the effects of heat and shear on polymerization and melt processing.

Extruded strand from the continuous synthesis of a thermoplastic polyurethane, containing the new paraformaldehyde-based polyol

Production of Thermoplastic Polyurethanes with Reduced Carbon Footprint

Thermoplastische Elastomere

Extruder

Polyurethan

Reactive Extrusion of TPU

Continuous Compression Molding (CCM) technology can be applied to multilayer solutions and is referred to as Continuous Compression Molding Multilayer (CCMM). In addition to the usual benefits of CCM it offers further advantages over competing technologies. In packaging applications, compression technology makes it possible to use minimal quantities of barrier material, thus combining excellent performance with low raw material costs.

EVOH distribution in a compression-molded multilayer capsule produced by CCMM: 1) complete distribution over cross-sectioned capsule, 2) enlargement of two zones (bottom and wall) of the capsule

16:9

Continuous Compression Molding Multilayer of Coffee Capsules

Warmformen / Thermoformen

Pressen von Kunststoffen

Co-Injektion (Barriere-/Sandwich-Spritzgießen)

Spritzgießen

Paying Attention to Layers in-between

In order to avoid bubble ruptures during the production of blown film, the velocity of the cooling air is often reduced. The use of air guiding systems (AGS) can prevent such bubble instability. A novel AGS was developed at IKV in Aachen, Germany, using iris diaphragms in order to increase the cooling efficiency of blown film extrusion and thus improve the productivity of an existing plant

Flexible air guiding system in blown film allows higher mass throughputs and greater process stability

Increase in Mass Throughput and Improved Mechanical Product Properties

Blasfolienextrusion

Nachhaltigkeit

Umweltmanagement

Kühlanlagen

Konturnahe Kühlung

Energieeffizienz

Extrusions-Zubehör

Flexible Guiding Systems  for Cooling Air

For the Institute of Plastics Processing (IKV) at the RWTH Aachen University, Germany, 2020 is an anniversary year in three different ways. The RWTH Aachen University is celebrating its 150th anniversary, and is marking the occasion, by hosting the International Colloquium of Plastics Technology for the 30th time – with special feature on the previous day. A preview of the celebrations.

Institute Director Professor Christian Hopmann expects 800 participants to attend the 30th International Colloquium of Plastics Technology

A Varied Menu

Doriat, Clemens, Dr.

Temperiertechnik

Künstliche Intelligenz für die Qualitätssicherung

Industrie 4.0

Industrie 4.0 für die Qualitätssicherung

Extrusionswerkzeuge

Werkzeuge für die Kunststoffverarbeitung

Additive Fertigung

Reason to Celebrate 30th International Colloquium of Plastics Technology and  70 Years of the IKV

Manufacturers of standard extruders sometimes incorporate oversized drives into their machine designs in order to be able to cover a wide range of requirements. In times of high energy prices, however, this is no longer economical. An extruder should be equipped with a drive package that is matched to the gearbox and the processing unit. But what are the requirements governing the design of the drive system?

Drives on the test bench: this type of motor test bench is used by Veka to collect experience about the operation of some 700 twin-screw extruders and 300 single-screw extruders used in production facilities worldwide at the most favorable operating point

Process-Oriented Design of the Main Drive for the Extruder

Elektrische Antriebe

Antriebe

PVC-Profile

Halbzeuge und Zwischenprodukte

Kunststoff-Halbzeuge

Flachfolien- und Plattenextrusion

Rohr- und Profilextrusion

Ingenieurwissenschaften

Elektrotechnik

Energy-Efficient Use of Drives

New polymer composites for the production of multi-layer small tubes are being developed to give products specific functions. With suitable co-extrusion dies and a thermal barrier option, even complex layer composites with melt temperature differences of more than 50 °C can be processed reliably and in high quality.

CV-T 5-layer co-extrusion die in pilot plant operation: tubes with small cross-sections that fulfill a multitude of demands can be produced by  co-extrusion

Combining Polymers with Very Different Processing Temperatures

Temperiergeräte

Gießanlagen

Baugewerbe (Hoch- und Tiefbau)

Medizintechnik (KU)

Kunststoffverarbeitung

Bautechnik, Sanitär

Extruder-Folgeeinrichtungen

Automotive

Fahrzeugbau

Co-Extrusion with Thermal Control

In the area of pipe and profile extrusion, the focus remains on increasing efficiency. In addition to energy-saving systems, the focus on efficiency increasingly includes flexibilization of plants and processes, as well as reproducibility of quality in production.

Optimization of Components and Expansion of Plant Control Systems Offer Potential  for Improvement

Kreislaufwirtschaft

Efficiency Remains the Order of the Day

Enhancing mixed bottle flakes by turning them into extrudable recycled crystalline polyethylene terephthalate (rCPET) was the goal of a joint development project looking to close the gap in the PET recycling system. By successfully producing a sheet made from recycled material suitable for high-quality applications such as thermoformed food trays, Gneuss, Sukano and Illig have demonstrated that this approach is indeed possible.

Thermally stable rCPET food trays made from multicolor APET bottle flakes

Upcycling of Mixed APET Bottle Flakes into Thermally Stable rCPET Food Trays

Polybutylenterephthalat

Farbstoffe und Pigmente

Additive

Schmelzefilter

Anlagen Lebensmittel

Anlagen für die Additive Fertigung

Anlagen Additive Fertigung / 3D-Druck, andere

Filteranlagen

Farbstoffe

Flakes

Kunststoff-Rezyklat

PET: From A to C

As expected, the K 2019 displayed a wide range of machine technology and complete system solutions for plastics recycling. At least since the trade fair in Düsseldorf, Germany, it has become obvious that industry today can offer solutions for closing the plastic cycle.

Complex chain: recycling materials (such as these shredded and washed fishing nets) have to pass through several stations, beginning with collecting and sorting, before they can be mechanically recycled

The Technology to Close the Plastic Cycle Exists

Sensorik für Kunststoff-Verarbeitungsmaschinen

Industrie 4.0 für die Kunststoffverarbeitung

Messe K-Kunststoffmesse

kunststoffe-international.com

IR-Sensor

Messtechnik

Sensoren / Messwertaufnehmer

Mahlgut

Wiederaufbereitung

Waschen und Entfetten

Sortierer

Mahlanlagen, fein

Sensoren,  optische

Schneidmühlen

Aufbereitungsmaschinen

Compoundieren

Mühlen

A Closed Recycling Cycle – Now!

The Italian company Bausano offers a new service for the operational leasing of extrusion lines. This provides customers with an alternative financing option for increasing their production capacities.

For extrusion lines, Bausano now offers an operating leasing model for financing

Extrusionsanlagen für KU-Verarbeitung

Kunststoffverarbeitungsmaschinen

Bausano Offers Rental Model for Extrusion Lines

Under the future name KMAT Maschinen- und Service GmbH, sales and service activities in Austria and Hungary areto be significantly strengthened.

Dr. Michael Ruf, CEO of KraussMaffei: „The sale of KraussMaffei Austria is part of our strategic realignment.“

Dienstleistungen

Lohnfertigung

Automatisierungstechnik

Spritzgießmaschinen

Unternehmen

kunststoffe.de

KraussMaffei Sells KraussMaffei Austria to Luger GmbH

Thanks to the combination of its Intarema TVEplus RegrindPro machine with the ReFresher, Erema has enabled the PCR-HDPE produced with it to be used in proportions of up to 100 percent for the production of packaging for direct contact with food and beverages.

In the Erema Customer Centre, test runs using an industrial class extruder-ReFresher combination can also be carried out from April onwards. Michael Heitzinger, Clemens Kitzberger and Thomas Hofstätter very much hope that more customer visits will be possible soon.

KU-Verarbeitungsmaschinen allgemein

Strong Demand for Recycling Systems Featuring Erema ReFresher Technology

Effective April 01, Dr. Bernd Kunze hands over the management of Reifenhäuser Reicofil to his two successors Dr. Boerge Wessling) and Stephan Gerharz.

The new managers of Reifenhäuser Reicofil are Dr. Boerge Wessling (left) and Stephan Gerharz

Anlagen zur Composite-Herstellung

Faser- und Filamentextrusion

Reifenhäuser Reicofil with New Management

The specialist´s in plastics extrusion focus at the show will be on sustainable packaging solutions for a functioning circular economy.

Sustainable solution for flexible packaging: Reifenhäuser All-PE Pouch.

Verbände, Institutionen, Messen

Reifenhäuser Presents Sustainable Packaging Solutions

Greiner Sells Extrusion Division to Nimbus

Under the new ownership, Greiner Extrusion Group and the extrusion specialist battenfeld-cincinnati will become sister companies and intend to exploit synergies in development, production and sales.

Greiner AG sold its extrusion division (Greiner Extrusion Group, GEG) – including the business’ respective land and buildings in Nussbach, Upper Austria and Trhové Sviny, Czech Rebuplic – to Dutch/German investment company Nimbus.

The respective sale and purchase agreement signed on November 29, 2021, was still subject to approval of the German Federal Cartel Office . With their positive response and Closing of the deal on December 21, 2021, ownership of GEG was transferred to Nimbus who is also majority shareholder of GEG’s market participant battenfeld-cincinnati (BC)

BC develops and produces extruders for the pipe, sheet and profile market and has operations in Germany, Austria, the US and China. BC extruders are sometimes sold in conjunction with GEG’s extrusion lines and tools. The two groups will no aim to achieve synergies where beneficial to both, in areas such as parts manufacturing and purchasing. Apart from that however, BC and the group companies of GEG will remain separate firms with their own organizational structures and market interfaces.

Nimbus Managing Partner Ed van Dijk on the transaction: “Like BC, GEG is an established manufacturer of high-performance plastic extrusion equipment. Both companies invest heavily in product development and are technical leaders in their distinctive fields of expertise, serving customers around the world. We are proud to be a shareholder in such a well-regarded company. Our focus as new owner is to ensure that both companies individually keep offering their customers the best possible solutions, while at the same time exploiting the synergies that the combination of know-how and capabilities will bring.”

Greiner CEO Axel Kühner adds: “It was particularly important for us to find the right partner who can and who wants to develop GEG further. As sister company to BC, GEG will be able to achieve many synergies within product development, production, and distribution – all advantages that Greiner cannot offer in this respect. Consequently, we have not been able to reach the full potential and growth of GEG in the past. With Nimbus we are now giving our extrusion business to a strong partner with a lot of experience, thereby putting GEG into an environment in which it can flourish better. With the completion of this deal, we at Greiner will now focus on our three major core areas Greiner Packaging, Greiner Bio-One and Neveon.”

Exelliq Austria GmbH  

https://www.exelliq.com

Greiner sold its extrusion division including the business’ respective land and buildings in Nussbach, Upper Austria and Trhové Sviny, Czech Rebuplic, to Nimbus.

2022-01-14 Greiner Extrusion + BC

issue 03/2025

issue 02/2025

issue 01/2025

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