Fig. 1: Uncovered load bearing elements of bias truck tire.

The influence of neglecting cord shrinkage and cord characteristic linearization on simulation results

Burst Test Simulation for bias Truck Tire

A model of a pneumatic bias tire based on the technique of overlaying the orthotropic reinforcing elements on isotropic rubber elements is presented. more...

September 13. 2019 - Research news

Fig. 3: Comparison  between the times of maximum intensity for the compositions of GEB NR and Latex NR.

The influence of the used methods of processing for incorporating mica as filler into the NR

Determination of Aging behavior of natural Rubber Nanocomposites reinforced with Mica prepared by Latex or Melt mixing Technology

The aim was to research the aging behavior of natural rubber compositions (NR) with synthetic mica by chemiluminescence (CL), in comparison with the traditional test of accelerated aging in forced air circulation with respect to the stress strain properties. more...

September 12. 2019 - Research news

Fig. 2: UFR of oligoisoprene synthesized inmethyl alcohol solution: conversion curve (a) and second-order curve (b). [OH] = 0.963 eqv. L-1

The kinetics of the urethane formation reaction between hydroxyl-containing oligodienes HTPB obtained

Urethane Formation Reaction in Oligodienes Obtained in Solutions of Alcohols under the Action of Hydrogen Peroxide

The kinetics of the urethane formation reaction between hydroxyl-containing oligodienes HTPB obtained by the action of hydrogen peroxide in alcohol solutions, and phenyl isocyanate has been studied. more...

September 11. 2019 - Research news

Fig. 5: Determination of the crosslink density by the Mooney-Rivlin approach.

The crosslink density of rubber compounds influences the in-rubber properties of the final product to a great extent

Determination of the Crosslink Density of Tire Tread Compounds by Different Analytical Methods

The crosslink density of rubber compounds influences the in-rubber properties of the final product to a great extent. more...

September 10. 2019 - Research news

Abb. 5: Konzept einer Vulkanisierpresse mit laufseitig zwischen Heizplatte und Fördergurt angeordnetem Induktor (teilweise in Schnittdarstellung).

A new heating method for use in vulcanizing presses

An Inductive Heating Method for Manufacturing of Plastic Metal Composites in Application for Splices of Steel Cord Conveyor Belts – Part 1

This paper examines a new heating method for use in vulcanizing presses in which the tension members of a steel cord conveyor belt are inductively heated to use them as an additional source of heat. The effects of this method on the strength of a belt splice are analyzed and the examination results are generalized for various belt types used in practice. more...

September 9. 2019 - Research news

Its lasting high Young’s modulus at higher temperatures is one remark­able advantage of rayon as reinforcement for high performance mechanical rubber goods.  Copyrigth: all Cordenka

Prompt brake pressure generation contributes to automotive safety

Advanced Rayon Brake Hose Reinforcement

Cordenka rayon is a high tenacity man-made fiber based on cellulose extracted from wood. Its key property is a high Young’s modulus that is performed constantly in a temperature range between -40 and +120 °C. This feature as well as rayon’s low thermal shrinkage, its good resistance to chemicals and its sustainable raw material origin have made rayon popular as reinforcing material for automotive tires and brake hoses. more...

August 7. 2019 - Tires in

Fig. 3: Stress-strain curves in the longitudinal direction of different cured composites.

PALF-filled Rubber

Improvement of Stress Transfer in short Pineapple Leaf Fiber reinforced Nitrile Rubber

This work demonstrates a highly efficient method for the improvement of stress transfer in acrylonitrile butadiene rubber (NBR) hybrid composites reinforced with short pineapple leaf fiber (PALF) by adding carbon black and using a specific mixing method. PALF-filled rubber was prepared as a masterbatch, use of which improved the final dispersion. more...

August 6. 2019 - Research news

Fig. 9: SEM of rubber mixes containing chopped carbon fibers and carbon black.

Characterize Compounds and Vulcanizates

New Trends in Natural Rubber Nano Composites

The aim of this study is to investigate the effect of rice husk fibers in absence and in presence of carbon black on the rheological, physical and mechanical properties of rubber composites and vulcanizates. more...

August 5. 2019 - Research news

Fig. 1: Raman spectra of alkanes, the enlargement of the C H stretching vibrations, and a further signal in the area of symmetrical vibrations of CH2. Raman spectra are compared with the IR spectra of n-hexane (right hand).

A spectroscopic Method for predicting Viscosity

Correlation between molecular and spectroscopic Properties of Polymers

The Mooney viscosity (MV) of rubbers is known to be an important processing parameter in the rubber industry. more...

August 2. 2019 - Research news

Fig. 1: Principle of Contifeed

A complete Description of Flow under Process like Conditions

A Capillary Rheometer with continuous Feeding

A new approach (Contifeed) for the determination of rheological behavior is presented. Contifeed combines a small lab extruder with a single or dual barrel capillary rheometer. more...

August 1. 2019 - Research news

Erste Tests von Reifen mit dem naturidentischen, biomimetischen Synthesekautschuk Bisyka zeigen, dass diese etwa 30 bis 50 Prozent weniger Abrieb im Vergleich zu Naturkautschukreifen erzeugen. Bildquelle: Fraunhofer IAP, Till Budde

Biomimetischer Synthesekautschuk mit optimiertem Abriebverhalten

Synthetic rubber outperforms natural rubber

Natürlicher Kautschuk aus Kautschukbäumen ist ein begrenzter Rohstoff. Synthetisch hergestellter Kautschuk reicht bisher im Abriebverhalten jedoch nicht an das natürliche Produkt heran und eignet sich daher nicht für LKW-Reifen. Ein neuartiger Synthesekautschuk erzeugt nun erstmals 30 bis 50 Prozent weniger Abrieb als Naturkautschuk. more...

July 1. 2019 - Tires in

Bei den Pedelecs ist der Akku in einem Gehäuse am Steuerrohr untergebracht, wo er sich zum  Laden bequem herausnehmen lässt. Dichtungen aus TPE sorgen dafür, dass das Gehäuse wasserfest ist und Geräusche keine Chance haben.  Bildquelle: 2018 Askoll EVA

TPE zur Vibrations -und Geräuschdämpfung am Akkuanschluss

Innovation in the e-mobility of power-assisted bikes and electro-scooter

Askoll, italienischer Hersteller von elektrischen Zweirädern, verwendet thermoplastische Elastomere zur Vibrations- und Geräuschdämpfung am Akkuanschluss seiner Pedelecs und Elektroroller sowie zur wasserfesten Abdichtung des Akkugehäuses. Zu den wichtigsten Anforderungen gehört dabei die zuverlässige Haftung auf glasfaserverstärktem PBT trotz geringer Kontaktflächen. more...

June 28. 2019 - Tires in

Die 0,5 mm dünnen Thermoplast-basierten Bipolarplatten sind sehr flexibel.  Bildquelle: alle Fraunhofer Umsicht

Material- und ressourcenschonende Herstellung von Bipolarplatten

TPE for Bipolar Plates

Aus neuen Thermoplast-basierten Kunststoff-Compounds lassen sich 0,5 mm dicke Bipolarplatten für Batterien fertigen. Diese sind um den Faktor 5 bis 10 dünner als bisherige Platten mit 3 bis 4 mm. Die Platten werden mit dem Rolle-zu-Rolle-Verfahren hergestellt. Dafür wurde der Prozess für die spezifischen Materialien angepasst. Besonders wichtig ist zudem die Wahl der richtigen Mischung für die leitfähigen Compounds. more...

June 24. 2019 - Tires in

Wittek 1

3D-Printing

Approach for additive Manufacturing of high-viscosity, curable Rubbers by AME Processing (Additive Manufacturing of Elastomers) – Rubber 3D

Additive Manufacturing of plastic or metal parts is state of the art. But in order to use different materials there is still a great need for development. more...

June 21. 2019 - Research news

Fig. 1: Schematic representation of a  tire cross section highlighting the cyclic sidewall deformation.

Mechanical Proberties of Rubber Composites

Oscillating Buckling Dynamometry (OBD) of textile reinforced Rubber Laminates

The dynamic response of reinforced rubber laminates is related to the viscoelastic properties of the constituent materials and to their distribution within the thickness in a quite complex manner. more...

June 21. 2019 - Research news

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