Organo film
The organic film is a fiber composite material , which is made from a thermoplastic plastic film and unidirectional long fibers with a fiber length of about 60 mm in the form of mats. The technology is important for the recycling of carbon fiber materials , which were previously hardly recyclable , but it is difficult to implement in terms of production technology. A laminate made of organic films consists of several individual layers, which are placed on top of one another with different orientations according to a previously calculated force curve and then consolidated.
The process chain for the production of the organic film was carried out at the Fiber Institute Bremen e. V. and realized for the first time at the Institute for Polymer Materials and Plastics Technology at Clausthal University of Technology as part of a project financed by the Federal Ministry of Economics 2008–2010 in cooperation with the Bremen Fiber Institute.
Procedure
The starting materials are a directly produced film made of polypropylene and cut rovings made of carbon fibers, which are aligned using vibration technology and conveyed onto the film. The pre-product of the organic film is then heated in a double belt press to the melting range of the thermoplastic, and the fibers are thus impregnated with the matrix .
Organo film laminates can be processed into high-quality components using two methods: deep-drawing or pressing processes. In contrast to the known organic sheets (fabric-reinforced thermoplastics with a higher fiber content), which can only be formed to a limited extent, thin laminates of the organic film can also be processed using the deep-drawing process.
Due to the high material price of carbon fiber, the further use of offcuts is particularly interesting. At the Fiber Institute Bremen e. V. was able to show that tissue waste with a square edge length of up to 100 mm can be separated quickly and automatically into individual staple fibers using vibration technology. In this way, a cost-effective semi - finished product can be produced which can be processed into heavy-duty components.
Possible areas of application of the organic film are in particular
- Automobile manufacturing
- Sports and leisure area
- Medical technology
- architecture
The advantages of organo film could be:
- Material-efficient semi-finished product made from recycled fabrics
- Individually adjustable but unidirectional fiber direction in the individual layer of the organic film
- Low weight with high resilience
- Deep drawing technique can be used
- Short cycle time
- Suitability for mass production
The Bremen Fiber Institute has been awarded several innovation prizes for the development of the organic film, including a. with the German Material Efficiency Award of the Federal Ministry of Economics 2009. There is currently no series production.
Similar materials
A similar technology is the organo tape , in which unilinearly aligned carbon fibers are integrated on plastics. The organo sheet consists of several layers of fiber tapes. A sheet is a standard semi-finished product that is used, for example, for reinforcements in injection molding applications, trim elements, bumpers and car seats. The structure ensures that the materials can withstand heavy loads without any problems. Thanks to the special fiber alignment, the finished object can be given special properties during production without interfering with the entire construction. In this way it is possible to optimize parts for strong, expected tensile forces, if necessary even without going through the semi-finished product. Here, too, experiments are being carried out with recycling material.
In view of the confusing number of different names for organomaterials, it should be noted that the choice of name is primarily based on patent and trademark protection considerations.
Individual evidence
- ↑ Saved? In: VDI-Nachrichten, May 10, 2018.
- ↑ Heinz Eickenbusch, Oliver Krauss: Carbon fiber reinforced plastics in vehicle construction - resource efficiency and technology. VDI Center for Resource Efficiency, Brief Analysis No. 3, 2013.
- ^ Website of www.compositence.com
literature
- Holger Fischer, Ralf Bäumer: Organo films made from recycled carbon fibers - new ways for CFRP semi-finished products in series production . Lecture, ThermoComp Chemnitz, June 30, 2011, online [1] (PDF; 2.3 MB)
- M. Wollenweber: High market potential for organic films. In: www.ingenieur.de, August 13, 2010 [2]