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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

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

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


Thermal diffusivity of NR

Comparison of Methods for Measuring the Thermal Diffusivity of Unfilled and Filled Natural Rubbers

A comparison between two measurement techniques for determining the thermal diffusivity of unfilled and filled NR samples is considered: more...

May 11. 2021 - Research news


Thermal Degradation

Fundamental Aspects for Evaluation of Activation Energy of thermal Degradation of Tetrafluoroethylene-propylene Elastomer by Weight Change

The activation energy of thermal aging of tetrafluoroethylene-propylene elastomer was evaluated by the measurements of the weight change, using two methods. more...

May 4. 2021 - Research news

Figure 1: Die comparison of melt index (laboratory) and online rheometer.

Online Capillary Rheometer

Online Rheometer – Increased Selectivity through continuous Measurement of the extensional Viscosity

Online control of product quality with regard to the rheological material properties is becoming increasingly important. more...

April 22. 2021 - Research news

Figure 12: Example of stress signal distortion at strain larger than the linear viscoelasticity limit. The distortion depends as well upon frequency.

Cone / cone Rheometer

Viscosity Measurement of filled Rubber Compounds – New insight for Error free Measurements

Cone/cone, closed boundary torsional rheometer (RPA) appears to be a highly interesting alternative to measure steady shear viscosity. more...

March 30. 2021 - Research news

CFD-derived T-ECAE-associated plots for computational flow-lines ((a), (d)), absolute values of dimensionless flow velocities   ((b), (e)) and the absolute values of dimensional tangential (shearing) stresses    ((c), (f)) for  punch inclination angles of   ((a), (b), (c)) and ((d), (e), (f)). T-die inlet   is at the top and the outlets and are from the left and from the right, where inlet and outlet channel widths are equal with.

Fluid Dynamic of viscous Fluids

Fluid Mechanics-based Research into beveled Punch-assisted Extrusion through a T-shaped Angular Domain

The paper is focused on a Computational Fluid Dynamics (CFD)-based description of local flow peculiarities during T-Equal Channel Angular Extrusion (T-ECAE) of an α-inclined punch-driven viscous fluid through a T-shaped die, derived with a numerical solution of a boundary value problem for the vorticity equation. more...

February 19. 2021 - Research news

Sumitomo Rubber Industries, Ltd.

Mechanisms of the mechanochemical reactions during the wear process

Effect of Molecular Structure on the mechanochemical Wear Behavior of hydrogenated and conventional SBR Rubbers

Effect of hydrogenation on the styrene-butadiene rubber (SBR) in terms of the mechanochemical wear behavior was studied focusing on the mechanisms of the mechanochemical reactions during the wear process. more...

February 15. 2021 - Research news

Abb. 1_Stocek

ISA-Measuringof the Crack Initiation Energy

Efficient Method for Characterizing the Service Lifetime of Rubber Seals

Seal applications require rubber compounds capable to endure numerous cycles of deformation without crack initiation. more...

October 1. 2020 - Research news

Abb 1_Tawfik

Biodegradability of HWC-Panels

Biological Performance of Hard Wood Composite formulated from Rice Straw and Polystyrene Foam Wastes

The objective of this study was to evaluate the biological resistance of Hard Wood Composite (HWC) panel incorporating various concentrations of Zinc Borate (ZB) and / or Magnesium Hydroxide (MH) against some fungi and bacteria decay. more...

September 30. 2020 - Research news


Rubber for electric cable

Study of Wear and Friction Behavior of HDPE-Composite filled by CNTs

Single and multi-walled carbon nanotubes are used in this paper as a filler material to of high density polyethylene. more...

September 4. 2020 - Research news

Fig. 4: Effect of TD to CBS mM ratios on the delta torque of rubber vulcanizates.

Evaluation has been made between TMTD-CBS and BPTD-CBS binary accelerators systems

Exploring the Synergism of Nitro­samine-safe Bis (N-benzyl piperazino) Thiuram Disulfide (BPTD) and N-Cyclohexyl-2-Benzothiazole Sulfenamide (CBS) in the natural Rubber Vulcanization

The synergistic activity of one novel nitrosamine-safe thiuram disulfide, namely Bis-(N-benzyl piperazino) thiuram disulfide (BPTD) in combination with CBS is investigated. more...

August 6. 2020 - Research news

Fig. 1: Cylindrical electrode with a diameter of 25 mm used in dielectric strength test.

Advantages over conventional composites

Study and Improvement of the electrical Properties of Polyester Composites

Styrenated polyester reinforced with small amounts of well dispersed nanoparticles of fumed silica, mica and graphite with the aim to offer advantages over conventional composites. more...

August 5. 2020 - Research news