Dienes Apparatebau GmbH

Muhlheim am Bach, Germany

Dienes Apparatebau GmbH

Muhlheim am Bach, Germany
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Agency: European Commission | Branch: FP7 | Program: CP-IP | Phase: NMP.2013.2.1-1 | Award Amount: 10.05M | Year: 2013

NEWSPEC aims at the production of Carbon Fibres (CFs) through very promising low-cost sustainable polyethylene (PE) precursors. PE can be derived from three independent sources: bio-ethanol, synthetic oil and recycled plastics. A main attribute of this project is the use of an available pilot scale facility (HPFC) that allows design and optimization of continuous CF processing and, at a later date, easy scale up to a larger industrial size plant. For PE stabilisation an original dry oxidation method, assisted by Electron Beam Curing (EBC), that introduces heteroatoms at the precursor stage is proposed. The new approach has technical, economic and ecologic advantages thus ensuring very innovative and flexible development of new CFs. Novel strategies for the reduction of the graphitisation temperature via the use of nucleation agents such as cellulose nanowhiskers, CNTs and fine graphite powders are envisaged. The partners will also explore the possibility of surface modification via atmospheric plasma techniques and room-temperature grafting with specific surface-attacking chemicals. Online non-destructive laser Raman probe, that can provide in situ information for the development of the various fibre structures during the processing stages, will be developed and installed at HPFC. Specific carbon composite prototypes will be manufactured and tested by the end-users during the lifetime of the project to ensure the validation of CF functionality for the final components with this ensuring proper exploitation of results. To prove overall environmental and economic sustainability LCA and LCC are implemented within all phases of the project. NEWSPEC brings together the best available expertise in Europe for the development of the PE-CFs up to mature exploitable technology. It consists of RTD performers with well-documented experience in CFs development and industrial end-users who are specialist in the target market segments. Half of the partners are European SMEs.

Developments of new and varied polymers which are processed either purely or in blends, can lead to new and improved fibres due to the spin process. The adaptation of the characteristics of these fibres to the follow-up processes requires sophisticated development work being affected by many influencing factors. The investments in appropriate facilities installations are high and the decision makers will face a dilemma. As it is not yet known how the future process must be designed, the plant to be established may only contain as little as possible process determining elements, which cannot be varied. The system must remain very flexibly adjustable. That means to arrange and keep the processing steps in yarn guiding variable and to be able to customise the control of the respective model without programming effort. Thus the following questions have to be answered: which aspects need to be considered by mechanical engineers during the development of a new filament in order to give the developer the highest possible flexibility; and how must the tools be constructed to be able to repeatedly take into account new ideas for the design of the plant? The paper presented attempts to answer such issues on the basis of examples.

Muller-Probandt S.,Dienes Apparatebau GmbH | Desch A.,Dienes Apparatebau GmbH
Chemical Fibers International | Year: 2014

In the field of fiber research, the machine technology for the washing of yarns has recently been lifted on a scientific foundation. The machine concepts have emerged by empiricism over the decades and now the chance arises to evaluate and optimize them and to assign them to specific process requirements. This article shall provide an overview of mechanisms of washing and of machine characteristics.

Muller-Probandt S.,Dienes Apparatebau GmbH
Chemical Fibers International | Year: 2015

Even though the washing bath is probably the most frequently used device, it represents only one out of several possible solutions for the task of washing. The washing bath is cost effective but the washing effect is limited. For improved washing effects the mechanics of fluids provide a multitude of hints for creation of flows during washing and for their mechanical realization. For validation of machine technology under real process conditions Dienes has developed a flexible and modular concept for pilot lines which allows in combination with the Multi-Mode control technology, to individually investigate alternative process arrangements.

Desch A.,Dienes Apparatebau GmbH | Laukhardt F.,Dienes Apparatebau GmbH
Technische Textilien | Year: 2010

Dienes Apparatebau, Mühlheim/Germany, provides engineering services and machines for laboratory and pilot installations and complete lines for small lots of special fibers, concentrating on melt and wet spinning processes. Wet spinning process is used for the production of high performance fibers as PAN precursors, polyurethane elastic fibers, or rayon. The polymer/solvent/non-solvent interactions and the rate at which the changes occur determine the fibrillar network and the ultimate fiber properties. Dry-jet wet spinning or gel spinning process includes dope stream extruded from a spinneret located a short distance above the coagulation bath with filaments entering vertically into the fluid solvent/non-solvent the bath. The advantages of gel-spinning process include dope temperature independent of coagulation bath temperature and easier and more stable production of filament titer less than 1 dtex.

Desch A.,Dienes Apparatebau GmbH | Reiter F.,Reiter GmbH Co. KG Oberflachentechnik
Chemical Fibers International | Year: 2010

Reiter Oberflachentechnik worked jointly with the Institute of Textile Technology and Process Engineering (ITV) Denkendorf, Germany, developed a centrifuge nanofiber spinning installation with the potential of producing fibers with low diameters of 80 nm in a simple and compact machine configuration at highest productivity. Centrifugal spinning installations with only 3 heads provided a throughput that was 1,000 times higher than conventional electrospinning installations with 25 rows of 1,250 spin jets. The centrifuge technology represented an advancement in many aspects and was commercially available within nanofiber spinning installations from Dienes Apparatebau. The materials used for the design of the components were adapted to the corrosion potential of the specific solvent. The centrifuge spinning heads were of a very slim design and were easily grouped.

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