Advantages of automated Elastomer Processings

At the annual highlight of the elastomer industry, Desma will demonstrate the performance of its technology by showcasing two machines from the S3 machine series. The smooth interaction of injection unit, peripheral equipment, robots and human is in the company’s focus at this trade fair. The company of Fridingen equips two machines from the S3 series with a whole range of newly developed technologies and makes them tangible in Nuremberg. more...

Quality Assurance

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Fig. 1: Experimental setup of high-pressure capillary rheometer test. Source: Institut für Kunststoffverarbeitung RWTH Aachen

Rheometric analyses are performed with a high-pressure capillary rheometer

Investigation of Wall Slippage in Silicone Rubber Compound by means of High-pressure Capillary Rheometer

Compared to organic rubber, silicone rubbers have a lower viscosity and a stronger structural viscosity. more...

June 26. 2018 - Research news

Mixing Room Solutions

DKT 2018: Mixing Room Solutions

HF Mixing Group´s strategy clearly has a focus for mixing room systems all delivered out of one hand. more...

June 25. 2018 - Product Review

Fig. 8: Temperature distribution of the NR20-sample during biaxial harmonic loading  with a strain amplitude of 60 % at 1 Hz at minimal and maximal strain of the 250th  loading cycle (left and middle) and curves of dissipative heating over time at different strains (right). Source: Leibniz-Institut Polymerforschung, Dresden

A new Biaxial Tester

Biaxial testing System for high static and dynamic Loading of Elastomers and its Applications

For the investigation of elastomers under near-realistic loading, a new Biaxial Tester was designed and tested. more...

June 21. 2018 - Research news

Fig. 3: Plots of ∆α/αt versus α for NR compounds (SEV system). Source: R. H. Schuster EVE Rubber Research Institute 43, Zhengzhou Road 266045 Qingdao, Shandong

The effect of one stage isothermal and two-stage non-isothermal cure on crosslink density, crosslink structure

Investigations on isothermal and two-stage non-isothermal cure of unfilled NR, Nd-IR and S-SBR Compounds

The effect of one stage isothermal and two-stage non-isothermal cure on crosslink density, crosslink structure and stress-strain behavior of unfilled NR, Nd-IR and S-SBR compounds has been investigated. more...

June 20. 2018 - Research news

Fig. 3: Schematic view of a void volume measurement system including filler sample. Source: Anke Blume, University of Twente

Abrasion resistance of silica filled passenger car tire tread compounds

Void Volume Measurement – an alternative Approach to Determine the Initial Structure of Silica

To improve the abrasion resistance of silica filled passenger car tire tread compounds a good dispersion and distribution of the silica in the rubber matrix is required. From the literature it is known that the structure of fillers affects the dispersion process. more...

June 19. 2018 - Research news

In der Bremsschlauchfertigung bei Contitech in Korbach wird Röntgenmesstechnologie für die inline Qualitätskontrolle eingesetzt. Bildquelle: Sikora

Röntgenmesstechnik für die Endkontrolle vor der Vulkanisierung

X-ray measuring systems for in-line quality control of brake hoses

Contitech Schlauch gehört zum Technologieunternehmen Continental und ist Spezialist für die Herstellung von Automobil- und Industrieschläuchen. Seit 2006 setzt das in Korbach ansässige Unternehmen in seinen Anlagen Sikora Röntgenmesssysteme zur Qualitätskontrolle während der Extrusion von Bremsschläuchen ein. Die Zusammenarbeit beider Unternehmen gründete auf einer zukunftsweisenden Lösung zur automatisierten Qualitätskontrolle im inline Prozess. more...

April 23. 2018 - Tires in

Seichi Kawahara_

LEDPNR/PLA Blend

Crystallization Behavior and mechanical Property of epoxidized natural Rubber/Poly (lactic acid) Blend

Liquid deproteinized natural rubber with an epoxy group (LEDPNR) / Poly(lactic acid) (PLA) blend was prepared by mixing and subsequent annealing at 200°C for 20 min. more...

April 16. 2018 - Research news

Im Futurelab des Unternehmens wird der Arbeitsplatz der Zukunft kontinuierlich weiter entwickelt. Bilder: alle Desma

Desma Open House 2017

Desma open House 2017 – Let’s talk future

Der Sondermaschinenbauer lud im September zum Open-House 2017 ein und setzte im Programm auf Zukunftsthemen. Nicht nur die Referenten gaben Impulse für die Technik von Morgen, sondern auch in der Maschinenpräsentation spielten Automatisierung, Vernetzung und moderne Arbeitsplatzgestaltung eine besonders große Rolle. Das Unternehmen macht sich auf den Weg zum Lösungsanbieter für Produktions- und Serviceleistungen und Partner für integrierte Produktions- und Geschäftsprozesse. more...

December 12. 2017 - Tires in

Unbenannt

Thermogravimetry, FTIR, GC/MS, DSC

Reliable Acrylonitrile Quantification of in-Service Acrylonitrile Butadiene Elastomers – coupled Analysis Techniques vs. classic Methods

The acrylonitrile content is a key characteristic of acrylonitrile butadiene rubbers (NBR). This paper describes the quantification of acrylonitrile of in-service NBR with several established analytical methods including the nitrogen determination according to Kjeldahl, the correlation with the glass transition temperature via differential scanning calorimetry (DSC) experiments and the analysis by attenuated total reflection infrared […] more...

November 28. 2017 - Research news

Mistler_

Part II: Application to Elastomer Couplings

Lifetime Prediction with nonlinear Damage Accumulation based on Material Stressing

The lifetime prognosis method for elastomer components through nonlinear damage accumulation of material stressing introduced in [1] is applied to elastomer couplings in this article. The hysteresis loops recorded in dynamical part tests are used to derive the development of damage progress and the damage induced material behavior. The method is calibrated by the damage […] more...

October 9. 2017 - Research news

Das Bedienen der Dosieranlagen im Silikonspritzguss wird sicherer. Ein in Kooperation von Anlagen- und Rohstoffhersteller entwickeltes Barcodesystem unterscheidet zuverlässig die Silikon-Komponenten. Das System ist offen und lädt auch andere Rohstoffanbieter ein, ihre Fässer entsprechend auszustatten.

Fasserkennung per Standard-Barcode im Silikonspritzguss

Drum identification with standard barcode increases operating safety in silicone injection molding

Ungeplante Anlagenstillstände sind das, was Kunststoffverarbeiter möglichst vermeiden wollen. Ein Ausfall kann maschinenseitige Ursachen haben, kann jedoch auch auf menschlichen Irrtümern begründet sein. Auch in etablierten Prozessen kann es dazu kommen, dass im Spritzguss die Silikon-Komponenten-Fässer verwechselt werden. Für ein sicheres Erkennen der Fässer sorgt nun ein Barcode-System, das als offener Standard angeboten wird. more...

October 9. 2017 - Tires in

Amornsakchai_

Stress-Strain Curves of BR, NBR and SBR

Synchrotron WAXS Studies of stretched Natural and Synthetic Rubber Networks showing an Upturn in Stress-Strain Curves*

Natural rubber (NR) displays very distinct stress-strain curve with an upturn in the stress at high elongations while most synthetic rubbers do not. This behavior has been associated with strain-induced crystallization. Here we show that three non-crystallizing weak synthetic rubbers, i.e. BR, NBR and SBR, could be reinforced in such a way that their stress-strain […] more...

September 1. 2017 - Research news

Unbenannt

Thermal oxidative aging

Characterization of Stress Relaxation of cured EPDM using Chemiluminescence

Stress relaxation is a limiting factor for elastomers used for seals. However, the mechanism of stress relaxation is not fully understood because of the complexity of influencing parameters like temperature, chemicals, stress etc.. From this reason a new method is developed to characterize the thermal oxidation process under deformation using chemiluminescence (CL). An increase in […] more...

August 30. 2017 - Research news

Wiss_2

Hansen-Löslichkeitsparameteransatz

Effect of Solvents on the Solution Electrospinning of Poly(styrene-co-acrylonitrile)

Non-woven nanostructured webs of poly(styrene-co-acrylonitrile) (SAN) were produced by electrospinning, which are promising in advanced filtration. more...

August 5. 2017 - Research Result

Wiss_3

Dielectric properties

Structural and Physical Properties of Biowastes filled Acrylonitrile Butadiene Rubber

Es wurden Komposite aus Acrylnitrilkautschuk (NBR), Dattelsamen (DS) und getrockneten Granatapfelschalen (PP)- Puder hergestellt und der Einfluss der Dattelsamen und der Granatapfelschalen auf die Morphologie, sowie auf die mechanischen und dielektrischen Eigenschaften überprüft. more...

August 4. 2017 - Research news

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