Das Klebesystem bietet einen guten  Kompromiss aus Flexibilität und Festigkeit. Die Klebesysteme haben nach circa 70 bis  80 Minuten die maximale Endfestigkeit  erreicht. Bildquelle: Sika

Klebesystem statt Heissvulkanisation

A fast, Efficient and reliable conveyor belt repair Method

Die strukturelle Reparatur von Gummikomponenten benötigt typischerweise eine Heissvulkanisation. Weit verbreitet sind auch Lösungsmittel-basierte Kaltkleber. Die dazu benötigten Schritte Rauhen, Voranstreichen, Belegen, Pressen und Heizen oder Kleben setzen eine lange Stillstandszeit voraus. Ein Acrylat-basiertes Klebesystem ermöglicht es, Gummikomponenten in kurzer Zeit wieder Instand zu setzen. more...

December 19. 2018 - Tires in

Fig. 5: (a) Formation of filler networking; (b) interaction between polymer-chains and filler particles.

CNTs in toluene and their Effects on the mechanical and electrical Properties

Effect of Sonication on mechanical and electrical Properties of Rubber Nanocomposites

Rubber nanocomposites were prepared by mixing room-temperature vulcanized (RTV) silicone rubber with pristine and sonicated carbon nanotubes (CNTs). more...

December 11. 2018 - Research news

Fig. 1: Dependence of dynamic viscosity on shear rate of rubber compounds based on SBR filled with different content of barium ferrite.

The Influence of Ferrite Content on dynamic Viscosity of Rubber

Barium Ferrite filled Composites based on SBR and NBR

Barium ferrite in concentration scale ranging from 0 to 200 phr was dosed to the rubber compounds based on SBR and two types of NBR. more...

December 10. 2018 - Research news

Fig. 2: Shore D indicator and testing method.

Tribological characteristics of pure poly(methyl methacrylate) (PMMA)

Influence of Adding Nano Graphene and Hybrid SiO2 – TiO2 Nano Particles on Tribological Characteristics of Polymethyl methacrylate (PMMA)

Tribological characteristics of pure poly(methyl methacrylate) (PMMA) reinforced with nano graphene and hybrid dioxides nano particles, SiO2 - TiO2, with weight fraction of 0.2%, 0.4%, 0.6%, 0.8% and 1% were investigated. more...

December 7. 2018 - Research news

Abb. 1: Schematische Darstellung der Bindungsmechanismen von Füllstoff zur Polymermatrix.

Acrylonitrile butadiene Rubber (NBR) in sealing Applications

Influence of fillers on the mechanical and tribological properties of acrylo-nitrile-butadiene-vulcanisates (NBR)

Acrylonitrile butadiene rubber (NBR) in sealing applications are highly reinforced with various fillers to improve their end-use properties. more...

December 5. 2018 - Research news

Fig. 3: Viscous wall shear stress component tV* = tD + tvisc (in red) and wall shear stress (Pa) as a function of shear rate (EPDM uncured subject to OSCAR of γ.0 = 500s–1 and p = 180s).

Viscous behaviour of EPDM and Compounds

Oscillating Shear Capillary Rheometry (OSCAR) of Rubber Compounds

The knowledge of the viscous behaviour of a rubber compound under steady state condition is required to assess the performances of the material in extruder die and mould design or in mixing process evaluation. more...

October 9. 2018 - Research news

Fig. 4b: Expected response influenced by superposition of stress recovery and continued relaxation.

Investigation of SBR filled with Carbon Black

Characteristics of Relaxation and recovery Behavior of filled Rubber

This paper presents new experimental approaches for investigating relaxation and recovery behaviour in steady-state dynamic tests on rubber filled with carbon black, illustrated here using SBR double shear test pieces. more...

October 9. 2018 - Research news

Thermoplastische Elastomere  mit anpassbaren Anteilen nachwachsender Rohstoffe von bis  zu 90 Prozent sind sowohl im Consumer- als auch im Industry- und Automotive-Markt gefragt. Bildquelle: 2018 Kraiburg TPE

Nachhaltige Rohstoffe für maßgeschneiderte TPE-Compounds

TPE mit variablem Anteil nachwachsender Rohstoffe

Mit der Entwicklung anwendungsspezifischer Compounds unter Einsatz erneuerbarer Rohmaterialien kommt Kraiburg TPE der wachsenden Nachfrage nach umweltverträglichen oder nachhaltigen Thermoplastischen Elastomeren entgegen. Dabei nutzt der Hersteller seine Kernkompetenz für maßgeschneiderte TPE auf der Basis bestehender ebenso wie neuer Rezepturen. more...

October 9. 2018 - Tires in

Fig. 1: Multi Walled Carbon Nanotubes (MWCNTs), [2].

MWCNTs in PMMA

Tribological Behaviour of Poly­methyl Methacrylate reinforced by Multi-Walled Carbon Nanotubes

The effect of multi-walled carbon nanotubes on the hardness, friction and wear of polymethyl methacrylate reinforced by MWCNTs of 0.1, 0.2, 0.3, 0.4 and 0.5 wt. % contents is investigated. more...

October 8. 2018 - Research news

Figure 2

Photosensitive HXNBR

Photo-triggered Self-Healing of Elastomers

The photo-reversible cycloaddition reaction of anthracene groups is used to impart self-healing properties into hydrogenated carboxylated nitrile butadiene rubber (HXNBR). more...

October 8. 2018 - Research news

Figure 1 – Distribution of pressure while filling in the original design, the runner system causes a distinct unbalanced filling

Ensuring part quality while minimizing scrap

Elastomer Parts – Finding the Optimal Runner System via Virtual DoE

Increasingly complex plastic parts, which need to meet economical as well as ecological standards, pose an enormous challenge for injection molders. Tools like the virtual DoE, featured by the Sigmasoft Virtual Molding Technology, help rising to these challenges, e.g. by finding the optimal mold design for runner systems. This can help to increase the part quality by a substantial amount while reducing scrap in early stages of the development phase. more...

September 14. 2018 - Tires in

Table 1: Triboelectric series of the tested polymers.

Electrostatic Charge

Triboelectrification of Latex and Polyethylene Gloves

The aim of the study is to determine the electrostatic charge generated from the dry sliding of the latex (NBR) and polyethylene (PE) single and double gloves against polyamide, polypropylene and polytetrafluoroethylene. more...

September 12. 2018 - Research news

Fig. 1: Different modes of tensile deformation (loading direction in y-axis): (A) Simple elongation with volume consistency and (B) pure elongation with dilatation.

Elongation

The Effect of Boundary Conditions on the Failure Behavior of Rubber Vulcanizates under Tensile Deformation

In this study tensile deformation under pure elongation of unfilled and carbon black filled SBR vulcanizates has been investigated experimentally. more...

September 12. 2018 - Research news

Fig. 2: Water drop on a steel surface with the apparent contact angle θ. The letters S, L and V indicate the phases of the solid, the liquid and the gas phase.

Surface-Caracterization

Review – Characterization of modified Elastomer Surfaces by wetting

This article features the current state of research with respect to plasma and varnished elastomer composites, which have been characterized by the sessile drop and the modified Wilhelmy balance technique. more...

September 12. 2018 - Research news

Abb.1: Das Montieren von Gummi- oder Kunststoffrahmen auf PKW-Fensterscheiben  erfolgt heute in zunehmendem Maße in Vertikal-Spritzgießmaschinen mit Schiebe-  oder Rundtisch-Schließeinheiten durch das Umspritzen mit Kunststoff oder Gummi. Bildquelle: alle LWB Steinl

Glasscheiben im Werkzeug umspritzen

Efficient framing of car glass windows

The assembly of plastic components is one of the most innovative applications of the injection molding process. In this case, two or more injection molding processes are sequentially strung together, either within a machine or by the combination of individual machines by means of a handling system. But the assembly by injection molding is not limited to plastic components, but also non-plastic components, such as wood, metal or glass can be assembled with plastic by injection molding. The latter is increasingly used for mounting gaskets on automobile windows. The efficiency of this assembly process is largely determined by efficient glass pane manipulation. LWB-Steinl has more than 20 years of experience and presents the options. more...

August 6. 2018 - Tires in

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