RFP - Rubber Fibres Plastics International

Ausgabe 02 | 2019


March now or swim later?

We have all heard about the movement ‘Fridays for Future’ – school students skipping school, demonstrating each Friday for a future without climate change and as they say “March now or swim later!” They are fighting for a right to live in a world without further global temperature rise and its subsequent catastrophic consequences.

The students want us, the older generation, to panic now, and to do something quick and radical about this issue. They want governments to do their job and act, rather than go round in circles. But should they really rely on politicians of our generation to fix the situation?

Recent events do not encourage this trust. Be it the US government and last winter’s month-long budget stalemate and shutdown due to disagreement on ‘Trump’s Wall’, or the U.K.’s catastrophe in slow-motion called Brexit that we are witnessing at the moment.

Politicians apparently imagine any deadline can be extended indefinitely with only limited risk. Is this wise for climate change or are the students right to panic now?

Politicians clearly do not understand the principle of a hysteresis. Change may be slow at the moment, but may accelerate with cascading effects. It won’t be easy to return to the present climate, if we miss this deadline.

But are any of us good about deadlines? In the immortal words of the late Douglas Adams: “I love deadlines. I love the whooshing noise they make as they go by.”

Let’s impress our kids and not whoosh on this one.

Isabella Kappner


New cooperation establishes link between research and education – University of Twente and Polymer Science Park in Zwolle pool their assets in new Elastomer Competence Centre

On 13 February 2019, the Elastomer Competence Centre (ECC) was officially opened on the campus of the University of Twente in Enschede, The Netherlands. The Elastomer Competence Centre is a new co-operation between the chair of Elastomer Technology and Engineering (ETE) of the University of Twente and the Polymer Science Park (PSP), an open innovation and knowledge center for applied plastics technology, located in Zwolle, The Netherlands. ECC will offer testing equipment and access to high-level knowledge for the rubber industry, and supports innovative development processes, especially of small and medium enterprises (SME).


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Arburg Technology Days 2019 – Focus on digitalisation

More than 6,000 visitors from 54 countries have joined the event at Arburg’s headquarters in Lossburg, Germany, between 13 and 16 March 2019. More than 50 machine exhibits and turnkey systems, the Efficiency Arena and a special service presentation were showcased. Highlights included the “AM Factory” and the “arburgXworld” customer portal. Expert presentations on current trends as well as guided tours of the operating factory rounded off the programme.


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Improved part properties via virtual DoE – Software identifies ideal parts and injection processes virtually

The German company Sigma Engineering GmbH from Aachen is presenting its ­Sigmasoft Virtual Molding software and the enclosed Autonomous Optimization technology at various exhibitions in spring 2019. The software helps to find the ideal configuration of part, mould and process in one calculation. The Autonomous Optimization and the included possibility to conduct virtual Design of Experiments (DoE) help the users to improve existing injection moulding tools and processes as well as to virtually test different configurations and innovative approaches.


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A catch (CO2)2 – CO2 shortages in spite of rising atmospheric CO2

As the Northern Hemisphere’s temperatures plummet, and football fans’ emotions rollercoaster, the shortage of CO2 in the UK is becoming more and more apparent. Besides the obvious (and vitally important) use of CO2 in adding the fizz to beer and soft drinks, it is also invaluable in a variety of other food-related fields, including, but not limited to, increasing the shelf life of pre-packaged meat and produce and cooling foodstuff in transit, as well as in a variety of medical devices and in crude oil extraction.


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Quantification of chip and cut behaviour of basic rubber (NR, SBR)

Tyre treads are exposed to rolling and sliding impacts which lead to damages, known as chip and cut (CC) effects. Reliable prediction of the CC behaviour of new tyre tread compounds is very difficult without field testing. The traditional CC test methods used in laboratories employ simple devices, where loading conditions cannot be applied sufficiently and reproducibly. In this work a new laboratory test equipment is presented, that allows the definition of suitable load conditions (force, rotational speed, impact incidence). The Instrumented Chip & Cut Analyzer (ICCA) produces wear patterns like the ones observed on surfaces of tyre treads that have been operated in the field for a while. The relevant data are collected during the test. Using a mathematical algorithm, realistic and reliable answers on CC behaviour of the rubber are derived from the measurements in a short time with very little effort.


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Serinol derivatives for the sustainable vulcanization of diene elastomers

2-amino-1,3-propanediol (serinol) was used as the starting building block of synthetic pathways which led to the preparation of innovative chemicals, suitable as ingredients for rubber compounds. Serinol based reactions were performed in the frame of a sustainable process, in the absence of any solvent and catalyst, with aldehydes and ketones, such as: acetone, cinnamaldehyde and camphor. The synthesis of either imines or oxazolidines was obtained with high selectivity. Serinol, imine and oxazolidine derivatives of serinol were used as accelerator for the vulcanization of diene rubbers. They were proved to be efficient secondary accelerators in silica based compounds based on poly(styrene-co-butadiene), in place of diphenyl guanidine. Kinetics of vulcanization were investigated for natural rubber based compounds, in the absence of any filler. With respect to serinol, the imine derivatives were able to enhance the induction time of vulcanization and to afford a similar vulcanization rate.


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Gas permeation behavior of thermoplastic vulcanizates (TPV) and ethylene-propylene-diene rubber (EPDM) under consideration of processing influences

For sealing materials in contact with gases such as hydrogen, a consideration of gas permeability is of elementary importance for the assessment of safety, functionality and reliability. The aim of the presented study is to give an overview of the permeation behavior of thermoplastic vulcanizates (TPV) and ethylene-propylene-diene rubber (EPDM) towards hydrogen under consideration of processing influences. A comparison of TPV and EPDM shows a differentiated permeation behavior. In general, the investigated thermoplastic vulcanizates show a comparatively higher gas permeability than EPDM compared to hydrogen. Processing influences such as weld lines and different manufacturing processes have only a minor influence on the gas permeation of the materials investigated.


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