Atr-Ft/Ir Spectrums of P1-P7 vulcanizates Aged At 60 °C, 0-72 Hours.

Thermal Oxidation is a Problem for most Rubbers

Spectroscopic Investigation of the Aging Process of a Tire Sidewall Rubber Compounds

All organic polymers like Rubbers with double bonds are at risk of oxidative processes. Antioxidants are added to the rubber compound to restrain the oxidative influences. more...

August 12. 2021 - Research news

Figure 3: (a) Galvanic corrosion occurs in the presence of two dissimilar metals, an electrically conductive separation and an electrolyte connection. The process does not occur when the two metals are isolated or when there is no electrolytic connection (9); (b) Corrosion mechanism occurring between aluminum and steel with a not-completely-isolating EPDM [11].

Significant impact on the EPDM weather-strip (WS) requirements

Statistical Approach of Designing Isolating EPDM Rubber Compounds to Enable Light-Weighting Solutions at Automotive OEMs

The automotive trend of replacing steel doors in cars with light-weight metals like Magnesium/Aluminum (Mg/Al) has a significant impact on the EPDM weather-strip (WS) requirements. more...

August 9. 2021 - Research news

Figure 1: Results of the rheological analysis by means of the RPA of the dynamic viscosity over ang. frequency ω for liquid rubber and reference bulk rubber samples.

Part 2: Development of low- viscosity Compound Formulations for use in additive Manufacturing

Additive Manufacturing of Rubber Parts based on liquid Rubber Polymers

This publication shows the investigation of formulations and the production of sulfur-crosslinked compounds based on liquid rubbers for processing by means of additive manufacturing in the „Direct-Ink-Writing” process. more...

August 6. 2021 - Research news

Fig 1: Slip velocity calculation method according to Mooney.

Consider shear stress and pressure independently

Wall Slip in Processing Rubber Compound revisited

In a previous paper, we have presented an alternative way to use the RPA (Rubber Process Analyzer) to measure both transient and steady shear viscosity [1]. more...

June 29. 2021 - Research news

Fig. 1 test sample arrangement, contact -separation mode; (a) original position, (b) contact stage, (c) separation stage. (d) Lateral sliding original position, (e, f) sliding stage.

Increase current output of the single-layer triboelectric generator (TEG).

Triboelectrification of Kapton Film under different Contact Modes

In the present work a single layer triboelectric generator (TEG) composed of Kapton film against Polytetrafluoroethylene PTFE thin layer investigated under different conditions to obtain the effect of contact mode, frequency, surface properties and electrode material on generated electricity as a result of friction between layers. more...

June 28. 2021 - Research news

Figure (3) Two-body abrasion, reciprocating sliding apparatus (1) Base plate (2) Plate (3) Linear bearing (4) Table (5) Emery paper (6) Test sample (7) Sample jig (8) Load cell (9) Normal load.

Crosslinking by light and silica nanoparticles

Development in the Surface Properties of the Hybrid Composite Resin by Light-Curing Process and Silicon Dioxide Nanoparticles

The purpose of this paper is to identify the surface properties of the hybrid composite resin as function of curing times, curing modes and fractions of SiO2 NPs. more...

June 24. 2021 - Research news

Fig. 1: Flow pattern in a calender-nip after Unkrüer [3].

Improvement of conversion tack on calender rolls - Part 1

Improved contact Mechanisms of high viscous Rubber Compounds on Calender roll Surfaces by using different Tackifier – Part 1

High viscous rubber compounds often lead to processing difficulties during calendering more...

June 22. 2021 - Research news


Mechanical-thermal behavior of rubber during the process

Simulation of a Heat-Buildup Process on Rubber Components

This article describes the simulation setup and the development of a simulation method for modeling the self-heating of cyclic-loaded rubber components within the well-known ABAQUS FE environment. more...

June 22. 2021 - Research news


Systematic process investigations on a rubber extruder

Optimization Approaches in Rubber Extrusion for Energy and CO² Savings

Systematic process investigations on a rubber extruder (40 mm, 16D) show on the basis of enthalpy increase, that the specific energy input is 0.3 - 1.7 kWh/kg and the thermal efficiency is in the range of 1 - 12 %. more...

June 15. 2021 - Research news

Fig.1: Approach for experimental optimisation of heating strategies using the HeatStraD (Heat Strategy Developer).

Energy efficiency is one of the central challenges for European energy policy

Optimisation approaches in continuous Vulcanisation to increase Energy Efficiency

The continuous vulcanisation is one of the most energy intensive processes in rubber processing. more...

June 15. 2021 - Research news

Bild 1: Poynting-Thompson oder Standard-Solid-Modell mit drei Parametern. Bildquelle: Fraunhofer LBF

Established procedures for the design of thermoplastic components

Tensile / Compression Difference in Behavior of Plastics

Mechanical properties of thermoplastics under tensile and compressive stress are investigated. more...

June 14. 2021 - Research news

Benjamin Klie_Thiel_Abb_1_

Part 1: Design and Construction of an AM-unit for 3D-Printing

Additive Manufacturing of Rubber Parts based on liquid Rubber Polymers

This publication describes the design and construction of a test rig for the additive manufacturing of liquid rubber-based filled and curable low viscous rubber compounds. more...

June 8. 2021 - Research news


Modified sepiolite was used as filler in silica based elastomeric composites

Sepiolite as reinforcing Filler for Rubber Composites: From the chemical Compatibilization to the commercial Exploitation

Chemically modified sepiolite was used as filler in silica based elastomeric composites. more...

June 1. 2021 - Research news

Figure 1.  Heat and Oil Resistance of Elastomers used in Automotive.

Heat- and Oil-Resistance of ACM

Next-Generation Polymer Solutions for Sealing and Fluid Transport in High-Performance automotive Transmission Systems

In dieser Publikation wird die nächste Generation der HyTemp HT-ACM Technologie vorgestellt, welche zeigt, wie diese neuen Materialien gleichzeitig die Grenzen der Tieftemperaturleistungsfähigkeit bis zu - 40 °C und die Hitzebeständigkeit bis über 175 °C verbessern, während die mechanischen Eigenschaften von Dichtungen in niedrigviskosen Getriebeöleinsatz erweitert werden. more...

May 25. 2021 - Research news


Magnetic Rubber Compounds

Magnetic and mechanical Characterisation of Rubber bonded hard Ferrites Composites

The mechanical and magnetic properties of hard ferrite filled rubbers are investigated. Different compounds based on acrylonitrile butadiene rubber (NBR) and hydrogenated acrylonitrile butadiene rubber (HNBR) were manufactured and analysed. The magnetic fillers OP-71 from Dowa and FA-700 from Toda Kogyo were used. The compounds were mixed in an internal mixer and subsequently processed in […] more...

May 18. 2021 - Research news