RFP - Rubber Fibres Plastics International

Editorial
3
RE3 – What’s that?

I admit that in retrospect, 2019 will certainly not be one of my favorite years in many respects, but uncertain and challenging times always bring something good with them, if you continue to move forward with confidence and courage, act counter-cyclically!

And so, in a time of economic uncertainty and the associated cutbacks in advertising budgets, trade conflicts, “plastic bashing”, and the demise of publishing houses, we have dared to launch a new magazine at K 2019:

The focus of RE3 is on Circular Economy. The three keywords “REduce”, “REuse”, “REcycle” appear again and again. In RE3 you can read what they stand for, and which interesting approaches and solutions are available. The magazine is published four times a year in German and English in PRINT and online. Visit www.re3.today and follow us also on Twitter and LinkedIn. Issue 01 will be published at the end of March.

The content of the magazine’s coverage focuses on solutions the industry is developing – new products, technical developments and information about companies that provide systemic solutions. In addition, it includes definitions of terms, scientific research results, pro-con comparisons, business news and articles about people in the industry and associations.

A critical view of the ongoing discussion is also necessary within the industry. Our focus is on a future-oriented and responsible handling of the valuable material plastics. “Green Washing” is out of place in RE3.

Although RE3 is not a technical magazine, it is managed in terms of content and sales by the expert staff of Dr. Gupta Verlags GmbH, who are also your contacts for all questions. RE3 is published by INDIGU Publishing.

With a new publisher, we have the opportunity to contribute with expertise and knowledge to the social discussion about the pros and cons of the various plastics in our everyday lives – extending the scope beyond the plastics industry.

Confident that our courage has paid off, and hopefully with your support, we look forward to communicating the know-how of the industry and the future possibilities and solutions to an ever broader audience.

Warmest regards
Indira Gupta


  

Report
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Global automotive markets 2020 – Industry under economic and transformation pressure

The automotive industry is under economic and transformation pressure worldwide. On the one hand, the transition to electric mobility must be shouldered. On the other hand, the poor state of the industry as a result of the US customs wars under President Donald Trump is causing concern. Switching to electro mobility will result in the loss of jobs in the industry, which cannot be compensated for by the growth processes in the coming years. Important value creation in the internal combustion engine sector will be lost bit by bit and replaced by highly automated battery and electric motor production.


  

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19
30th International Colloquium Plastics Technology and 70 years of IKV

The year 2020 will be an anniversary year in three respects for the IKV – Institute for Plastics Processing in Industry and Craft at RWTH Aachen University: The RWTH Aachen University celebrates its 150th anniversary, IKV will celebrate its 70th birthday and it will be the 30th time it stages the International Colloquium Plastics Technology – on 11 – 12 March 2020 in the Eurogress Aachen. The day before the Colloquium, on 10 March 2020, IKV will mark its anniversary by holding the International Symposium on Plastics Technology in the VIP area of the Tivoli soccer stadium. While the Colloquium will present the broad range of IKV research and will target primarily the plastics industry with its practice-oriented research, the Symposium will feature papers from scientists from 14 countries, and aims to arouse lively discussion between scientists and industry.


  

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20
Co-crosslinking, improved grip and more sustainability – Kuraray Liquid Rubber made from sugar cane

As one of the leading manufacturers of speciality chemicals, Kuraray will present new liquid rubber grades at the Tire Technology Expo 2020. A special focus will be on bio-based Liquid Farnesene Rubber.


  

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31
Amaplast: The Italian market for plastics and rubber machinery, equipment and moulds

On 8 January 2020, the Italian plastics and rubber processing machinery and moulds manufacturers association Amaplast announced that it expects a negative year-end result for the Italian plastics and rubber processing machinery industry, citing foreign trade data published by the Italian National Statistical Institute (ISTAT) for January – September 2019. The statistics show a continuing slump in the two trade flows, down –13.1 % for imports (overall value of EUR 645 million) and –8.5 % for exports (just below EUR 2.16 billion) with respect to the first nine months of 2018.


  

Article
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The two-roll plasticiser (TRP) – A new process technology closes a gap in the processing of rework materials in the tyre industry

The TRP Reworker is a resource-saving technology for the economical processing of rework materials based on the two-roll plasticiser (TRP) with integrated roll-ex gear pump. In an automatic process, unvulcanised rubber compounds are processed particularly gently and continuously in order to return this rework material to the production process. In tyre production compound waste is unavoidable due to the process. This material should be reworked with regard to the issues of sustainability and the economical handling of valuable resources, and not least because of the high raw material costs. Based on the Uth TRP technology, the company has developed the TRP Reworker. This new process technology combines the proven methods in rubber processing such as cracking, homogenising and discharging, thus closing a gap in the processing of rework materials. The concept is based on TRP technology and comprises three zones along the length of the roll, resulting in a continuous, reproducible and fully automated process.


  

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26
Methods for simultaneous dynamic-mechanical and dielectric analysis – Part 1: Dielectric investigation of elastomer composites under static deformation

Elastomer materials are often reinforced with electrically conductive fillers such as carbon black. The carbon black structures in the rubber matrix change under mechanical deformation and can therefore be used as “markers” for condition monitoring of elastomer components. Dielectric analysis is a suitable method for measuring this effect. In order to be able to use it for this purpose, it is necessary to know the exact correlation between the mechanical and dielectric properties of the material. The key to understanding this correlation lies in the use of simultaneous dynamic-mechanical and dielectric analysis. The work presented here deals with the influence of a defined static mechanical deformation on the dielectric spectra of a carbon black-filled, hydrogenated acrylonitrile butadiene rubber (HNBR). This is the first article of a series of three that will describe all aspects of simultaneous dynamic-mechanical and dielectric analysis. A Diplexor 500 N from Netzsch was used for the investigations.


  

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32
Novel activator for DPG replacement and property improvement

This paper demonstrates the properties of a novel ionic liquid activator as a DPG replacement and curing additive. The novel activator shows good cure time yet demonstrates scorch safety and some accelerator and zinc efficiency. This paper will focus on the DPG replacement for tyre and conveyor belt segments in rubber manufacturing. This study is conducted on two main rubber compounds, a carbon black filled NR and a highly silica filled SBR which has been silanized. The different effects of varying zinc oxide content, addition of extra silica, removal of DPG content, addition of the DPG replacements Premix Acti 8 and Activ8 on cure characteristics and mechanical properties of the materials have been evaluated. 


  

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38
Effect of polymer chain modifications on elastomer properties – Part 2


 Considerable attention is paid to the influence of crosslink density and crosslink structures on behavior of polymer chains and properties of elastomers. However, a very important parameter seems to be underestimated: the modifications to the polymer chains by curatives, formed by sulfur and fragments of accelerators. The present paper intends to draw attention to this important contribution to performance of spatial networks. Emulsion styrene-butadiene rubber (E-SBR) samples, cured with tetramethylthiuram disulfide with sulfur (TMTD/S8), and zinc dialkyl dithiophosphate with sulfur (ZDT/S8), were studied. They were characterized in detail in terms of crosslink density and crosslink structures. Microscale techniques were used to obtain information about the behavior of the polymer chains: PALS to study the free volume structure; DSC and DMA to monitor the glass transition process. Properties such as static mechanical performance and thermal stability were also evaluated. All of the investigated characteristics were influenced by a combination of crosslink density, crosslink structures, and, to a large extent, by the modifications of the polymer chains. The effect of the modifications is dependent on the amount and the structure of the curatives’ molecules. On the basis of the obtained results, the reliability of „phr” unit used for calculation of the curatives’ amount has been queried. Furthermore, it has been demonstrated that DSC, DMA and PALS techniques can provide evidence for the presence of the modifications on the polymer chain by curatives.

Part 1 (RFP 04 2019) describes how the composition of the curing system generally influences the network structure. It contains the experimental part and the comparison of the crosslink density, crosslink structures and modifications of the chains, formed as a result of curing with TMTD/S8 or ZDT/S8. In part 2 the results of DSC, DMA, and PALS measurements show that the modifications of the polymer chains seem to influence the chain stiffness, inter-chain interactions, glass transition process, ease of crystallization, relaxation times, free volume size, thermal stability, and tensile strength.

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