Recycling

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Zahnwalzenmühle Xtra

Verstärkte, gefüllte und hart-spröde technische Kunststoffe in mittleren bis großen Losgrößen lassen sich mit den Zahnwalzenmühlen der Xtra-Baureihe zerkleinern mehr...

16.Juni 2008 - Produktbericht

Zweischneckenextruder-Technologie zur Herstellung von Klebebändern

Butylkautschuk kontinuierlich auftragen

Neue Wege bei der Produktion von Klebebändern auf Basis von Butylkautschuk beschreitet Carlisle Hardcast Europe aus dem niederländischen Weesp. Anstelle des üblichen, diskontinuierlichen Batchverfahrens wird hier eine kontinuierliche Extrusionsanlage eingesetzt. mehr...

13.Februar 2007 - Fachartikel

Recycling

Dynamic Devulcanization and Dynamic Vulcanization for Recycling of Crosslinked Rubber1)

A new recycling technology for crosslinked rubber was developed using continuous reactive processing methods. In the process of producing reclaimed rubber, a breakage of crosslinking points in the rubber matrix occurs selectively under optimized controls of shear stress, reaction temperature and internal pressure in a twin screw extruder corresponding to the dynamic devulcanization process. The […] mehr...

10.August 2006 - Neues aus der Forschung

Recycling

Model Compound Studies on the De-Vulcanisation of Natural Rubber at Different Temperatures

The mechanism of de-vulcanisation of sulphur-vulcanised natural rubber with aromatic disulphides and aliphatic amines is studied using model compounds (MC): Low-molecular-weight polymer compounds are used as replacement of the reactive unit of the polymeric rubber. The devulcanisation efficiency depends on the distribution of the sulphur ranks: Higher ranks of the sulphide crosslinks arede-vulcanised quite easily […] mehr...

11.Juni 2005 - Neues aus der Forschung

Devulcanization in a Counter Rotating Twin Screw Extruder

Recycling of Waste Tire Rubber Powder

An intermeshing counter-rotating twin screw extruder with constant root and flight diameters of the screws having L/D ratio equal to 10 has been designed, fabricated and installed for waste rubber recycling. Waste ground rubber tire (GRT) powder procured from local market was devulcanized and mixed with 30 phr NR to give satisfactory vulcanizates properties. Further […] mehr...

21.Mai 2003 - Neues aus der Forschung

Recycling

Standards for Rubber Granulates and Powders

Rubber powders (or granulates) from ground rubber scrap materials are used in many applications in different fields. These applications ask for different properties of the rubber powders. In this paper a number of suggestions to classify powders are given. A reference is being made toward ASTM D5603, that classifies powders with respect to feed stock […] mehr...

28.April 2003 - Neues aus der Forschung

Kautschuke

Mechanical, Rheological and Morphological Properties of Recycled Expanded Polystyrene/Styrene Butadiene Rubber Blends

Mechanical, rheological and morphological properties of recycled expanded polystyrene/styrene-butadiene rubber (rPS/SBR) blends are studied. The SBR concentration was between 0 and 50 %. Properties of brittle rPS could be changed by SBR. At > 20 wt.-%, significant increases in elongation at break and impact strength were observed. Tensile strength, hardness and Tg decreased with increasing […] mehr...

28.April 2003 - Neues aus der Forschung

Recycling

Market cycle and investment behavior of polyolefin producers

In this article, the development of the yield of the polyolefin sector as well as of the individual companies was investigated without differentiation in products or market segments. The main driving factors were identified using as source of information the annual reports of 19 international polyolefin producing companies (resp. Business units) in the period from […] mehr...

28.April 2003 - Neues aus der Forschung

Recycling

Interphase Grafting of Reclaimed Rubber Powder

In material-sensitive recycling of crushed reclaimed rubber materials, which is achieved by admixing the recycled rubber with new rubber matrices, a drop is noted in the mechanical value level of elastomers. This drop is due to deficient grafting of the recycled rubber with the fresh rubber matrix. To improve grafting quality, the particle surfaces are […] mehr...

28.April 2003 - Neues aus der Forschung

Recycling

Einfluß von Altgummipartikeln auf das mechanische Eigenschaftsprofil von Thermoplast-Blends

Im vorliegendenen Beitrag wird die Möglichkeit untersucht, gemahlene Altgummipartikel der Korngröße 0,4 ±0,7 mm in Thermoplast-Matrizes einzubinden. Der Einfluß der Altgummipartikelzugabe auf technisch relevante Eigenschaften wie Zugfestigkeit, Zug-E-Modul, Kerbschlagzähigkeit und dynamisch-mechanisches Verhalten wurde bestimmt. Weiterhin wurde die Eigenschaftsmodifizierung der Gummipartikeloberflächen durch Anquellen mit einem paraffinischen Weichmacheröl untersucht sowie deren Einfluß auf das mechanische Eigenschaftsprofil der […] mehr...

28.April 2003 - Neues aus der Forschung

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