TPE Magazine international

Editorial
125
“Back to normal” – what does “normal” mean?

The corona crisis has taught us that working from home is often more efficient. We have more time for family life due to fewer business trips, and also CO2 emissions have fallen in many industrialised countries due to the lockdown.

But we also realized that the large number of video conferences and webinars is beginning to wear us out, that short conversations with colleagues would be helpful for our work process, and that we lack real meetings and exchange with business partners and customers.

Like many of you, all staff of Dr. Gupta Verlags GmbH initially worked from home. We have implemented short-time work and have distributed our magazines only digitally owing to the lack of analogue distribution channels, such as trade fairs and conferences, but also because in most companies many employees could only be reached in the home office.

But as human beings we need external stimuli, sensory stimuli and emotional attention and recognition.

That is why we have decided, in compliance with hygiene recommendations, to take a first step “back to normality” and work again in the office in small and changing teams. Even though there will probably not be any major trade fairs and conferences this year, some of our magazines will gradually be published again, in addition to the online version, as real, tangible, analogue print magazines.

It remains to be seen whether there will really be a “back to normal”, and what this looks like, and whether a “second corona wave” is coming.

But I would like to take this opportunity to thank you, dear readers, contributors, and advertising customers, for your interest in our magazines, your contributions and your loyalty. Without you we would not be able to do the work we do with all our hearts and minds.

THANK YOU!

I wish you an enjoyable time reading and
...stay healthy!

Cordially
Indira Gupta


  

Report
138
The five senses of thermoplastic elastomers – Perception of a material beyond technical data sheets

Have those of us who class ourselves as ‘polymer addicts’ ever wondered how we would describe a polymer or plastic of the moment without ‘usual’ technical data sheets that are often so similar to each other? This isn’t supposed to be a literary exercise (there’s nothing literary about polymer materials), but a serious point of reflection on what makes one material a winner over another for a certain application. Therefore, let’s forget just for a minute about TDS analysis, analytical methods, typical values, specifications and so on, and try to think about what end users really feel when handling an object, looking at it, using it and saying “Great!”, or looking anything but impressed and moving on to the next thing.


  

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139
Kraton: Award for IMSS Technology

The 2020 Ringier Technology Innovation Award – Plastics Industry in the Raw Material & Additives category – goes this year to the Kraton IMSS Technology.


  

140
New possibilities for sustainability in automotive interiors – Hexpol TPE expands range of biobased TPEs


Hexpol TPE have added more grades to their Dryflex Green family of biobased TPE compounds. The series now includes grades based on styrenic block copolymer (TPS) and thermoplastic polyolefin (TPO) technologies, with amounts of renewable content to over 90 % (ASTM D 6866-12) and hardness from 15 Shore A to 60 Shore D.

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141
New material to enhance carbon capture technology

Scientists from ExxonMobil, University of California, Berkeley and Lawrence Berkeley National Laboratory have discovered a new material that could capture more than 90 % of CO2 emitted from industrial sources, such as natural gas-fired power plants, using low-temperature steam, requiring less energy for the overall carbon capture process.


 

142
A leader in thermoplastic elastomers and a TPE problem solver – About Star Thermoplastic Alloys and Rubbers, Inc.

Star Thermoplastic Alloys and Rubbers, Inc. (“Star”) is a custom solution provider of TPEs and plastic alloys. The company’s mission is to provide thermoplastic elastomers and specialty alloy solutions that are designed specifically to meet customers’ expectations in a broad range of industries.


 

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144
Special: additive manufacturing

  • 3D printing latex rubber
  • PEBA for selective laser sintering processes – 3DPRINTUK expands material and post processing capabilities
  • Evonik: New technology centre for 3D printing in the USA
  • BASF Forward AM/Prismlab: Partnership in 3D printing
  • Lubrizol: Acquisition of Avid Product Development
  • DSM: Partial acquisition of Clariant’s 3D printing business portfolio
  • Lubrizol: First TPU powder grade for HP Multi Jet Fusion 3D printing technology
  • Synnex: Distribution agreement with Lubrizol
  • Adidas: Helping healthcare workers with 3D printed face shields


    

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149
Next Fakuma to take place in October 2021 – Schall launches virtual platform for 2020

The trade fair organiser P. E. Schall GmbH & Co. KG has finally decided to cancel Fakuma 2020 and to launch a virtual platform instead. The next international trade fair for plastics processing is now scheduled for 12 – 16 October 2021 in Friedrichshafen, Germany. The organiser said that the decision was made in cooperation with the Fakuma exhibitor advisory board.


  

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150
Preview to Chinaplas 2021 – “New Era – New Potential – Innovation for Sustainability”

The 34th edition of Chinaplas has been rescheduled to 13 – 16 April 2021, at a new venue – Shenzhen World Exhibition & Convention Center. The trade fair will from 2021 on alternate between Shenzhen (odd years) and Shanghai (even years). Chinaplas organiser Adsale Exhibition Services Ltd. held a press conference on 23 June to give an outlook to the event 2021. Stanley Chu, Chairman of Adsale, Ada Leung, General Manager of Adsale, and Norris Chu, Project Director of Adsale, announced updates about the trade show and discussed post-pandemic opportunities in the plastics and rubber industries.


   

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168
Without thermal chamber – Fraunhofer LBF develops dynamic plastics testing even at low temperatures

Plastics behave dependent on temperature and strain rate. When designing components, it is therefore important to know the behaviour of the plastic used, not only under laboratory conditions, but also under the subsequent conditions of use. The entire spectrum of possible temperatures must be considered. To this end, scientists at the Fraunhofer Institute for Structural Durability and System Reliability LBF have expanded the dynamic possibilities at the institute’s own modified high-speed testing machine with a device that enables plastics to be examined even at low temperatures – validated down to -40 °C – without a thermal chamber.


   

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169
German plastics and rubber engineering with decline in turnover for the first time in many years – Sales decline in 2020 with a minus of up to 30 %

The VDMA, the German trade association Plastics and Rubber Machinery, has published its annual report. As expected, in 2019 the soaring rise in turnover of the past years has come to a halt: German plastics and rubber machinery manufacturers had to resign themselves to a turnover fall of 6 %.


   

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Article
152
TSSR measurement as an effective test method for crosslinking of TPS-SEBS

The world of TPS-SEBS are the multicomponent hybrid parts. Examples are found in all areas of the daily life indoor and outdoor, for example toothbrush handles, all kinds of grips, sealings for food containers, cup holders in the car and so on. The typical service temperature range is between -60 °C up to 125 °C. In this article we present crosslinked TPS which find their application fields in parts with peak service temperatures above 150 °C. The crosslinking effects were effectively validated by means of a TSSR-Meter (temperature scanning stress relaxation).


    

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154
Thermoplastic vulcanizates based on dynamically vulcanized polypropylene/carboxylated nitrile rubber blends

Thermoplastic vulcanizates (TPVs) based on polypropylene (PP) and carboxylated nitrile rubber (XNBR) with improved mechanical properties were prepared by dynamic vulcanization using dicumyl peroxide (DCP) in combination with N,N0-m-phenylene-bis-maleimide (BMI) as a cross-linking system. The effect of PP grafted with maleic anhydride (PP- g-MA) or with glycidyl methacrylate (PP-g-GMA) and triethylene-tetramine (TETA) as the compatibilizing systems on the mechanical, morphological, and dynamic mechanical properties of PP/XNBR blends was investigated. Experimental results revealed that PP-g-GMA has a better compatibilizing efficiency. Tensile strength and elongation at break presented a significant improvement with the addition of 2.5 to 7.5 phr of this functionalized PP. The improvement of the tensile properties was observed for all blend compositions studied. Also the tensile properties of the blends did not change considerably after three reprocessing cycles, confirming the efficiency of this system as a TPV. The presence of PP-g-GMA also resulted in an increase of the apparent melt viscosity of the corresponding TPVs, confirming the reactive compatibilization. A decrease in rubber particle size with the presence of PP-g-GMA was also observed by scanning electron microscopy.


    

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160
Mechanical performance of novel polyisobutylene-based elastomeric polyurethanes before and after hydrolysis

The mechanical performance of thermoplastic elastomeric polyurethanes (PUs) before and after hydrolysis is investigated. These new PUs were prepared with a new asymmetric polyisobutylene-diol (PIB-diol), without the use of solvents, and with short reaction times. The PUs were made with dicyclohexylmethane 4,4'-diisocyanate and 1,4-butanediol in the hard segments and poly(hexamethylene carbonate) (PC)-diol and polyisobutylene (PIB)-diol in the soft segments. The functionality of PIB-diol was verified by mass spectrometry. Optimum solventless synthesis conditions and performance were found with a mixture of 50/50 PIB-diol/PC-diol (28.9 wt% PIB in the PU). This PU had 26.03 ± 1.19 MPa tensile strength with 286.92 ± 12.17 % elongation before and 16.22 ± 0.65 with 301.17 ± 15.08 % elongation after American Society for Testing and Materials (ASTM) hydrolytic stability testing. Importantly, after the hydrolytic stability testing, the stress-strain plot of this PIB-PU was similar to that of the control PC-PU. The PU with 70/30 PIB-diol/PC-diol (41.2 wt% PIB in the PU) performed slightly better but needed solvent during synthesis because of the high viscosity of the mixtures.


        

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