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...

Testing

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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

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

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

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

Sae-oui_

Treating of NR Latex

Effect of Protein Crosslinking by Maillard Reaction on Natural Rubber Properties

Maillard crosslinking of proteins in natural rubber (NR) was carried out by treating fresh NR latex with various amounts of the Maillard reagents, i.e., formaldehyde (HCHO) and glutaraldehyde (C5H8O2). Attenuated total reflectance infrared spectroscopy revealed the occurrence of protein crosslinking in the treated NR. The treated NR contained higher protein content leading to not only […] more...

May 5. 2017 - Research news

Gomaa_Aly

PALS

Free Volumes and their Distribution in SiR/EPDM Rubber Blends probed by Positron Annihilation Lifetime Technique

The nanoscale free-volume holes sizes, fractions and their size distributions in silicone rubber (SiR), ethylene propylene diene rubber (EPDM) and their blend (SiR/EPDM) are characterized by positron annihilation lifetime spectroscopy (PALS). The results show that EPDM has an estimated smaller free-volume hole size of 193.4 Å3  with a fraction 9.10 % as compared to the corresponding […] more...

May 2. 2017 - Research news

Ulrich Giese

Damping behavior

Influence of Water on Dynamic Mechanical Properties of Silica Loaded Tire Tread Vulcanizates

The damping behavior of silica-loaded vulcanizates is significantly affected by the amount of absorbed water. It results in the formation of a new tan δ peak around -5 ~ 0 °C and an increase of the loss modulus G’’, which can be taken as an indicator for the improvement of wet skid resistance. By the […] more...

April 10. 2017 - Research news

Unbenannt

Energieübertragung zur kontinuierlichen Vulkanistation

Analysis of the Efficiency of continuous Vulcanisation Processes

As shown in lab-scale investigations on continuous vulcanisation processes show, that various forms of vulcanisation energy transfer have very different energy demands and deliver material-specific different vulcanisation results and properties. In order to enhance basic knowledge on influential factors on continuous vulcanisation processes, a research is conducted on material-specific ideal vulcanising strategies using a specially […] more...

April 10. 2017 - Research news

DSC6679

Predictive Maintenance-System

Network to prevent downtime

Da Walzwerke wie die der Gummiwerk Kraiburg fast durchgängig im Dreischichtbetrieb laufen, spielt die Maschinenverfügbarkeit dort eine sehr wichtige Rolle. Schließlich verzögern Ausfälle bei einer einzigen Maschine den gesamten Produktionsprozess und verursachen so am Ende extrem hohe Kosten. Ein System zur vorausschauenden Wartung unterstützt dabei, die Anlagenverfügbarkeit zu sichern bevor ein Stillstand eintritt. more...

March 30. 2017 - Tires in

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