JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 97

Fleissner fibre lines, started to work on the above-mentioned goal in 2008. Together with the Eisenmann company, known for its general finishing technology, material flow automation, environmental technology and high-temperature technology such as oxidation ovens, and Ruhstrat, a key manufacturer of heat treatment facilities for laboratory and industrial applications such as carbonization furnaces, they formed an alliance to design, engineer, customize and deliver complete carbon fibre production lines in different sizes as required by the market.
Fig. 1: Flow Chart of Carbon Fiber Process

Polymerization and precursor lines
With regard to the polymerization step, two different processes are generally applied for producing a polyacrylonitrile (PAN) polymer. The first one consists in polymerizing acrylonitrile in a solvent, which keeps the polymer in solution. The most advantageous alternative is the solution of acrylonitrile in water where monomer is polymerized using a redox initiation system and PAN is precipitating during chain growth. A redox system is used to initiate this interfacial process. It is important in this process to ensure the correct

As water is used in the liquid phase for dissolving acrylonitrile, low environmental pollution can be ensured, eliminating the need for poisonous, explosive, and inflammable organic liquids used in the other process. Since the radical polymerization never reaches full conversion, the monomers must be suitably recovered. After certain additional steps, the solid polyacrylonitrile can be dried. A subsequent continuously-operating spinning solution preparation system ensures that the solution remains at a constant level of consistency. This so-called dope is then pumped at a uniform flow rate to the electricallyand mechanically-coordinated spinning system of the Fleissner precursor line. Fleissner precursor lines consist of highly-sophisticated spinning units that ensure homogenous consistency and shape of the fibre tows. Through an intelligent combination of drive management, temperature and fluid circulation control systems, these lines produce an even and uniform fluid flow and concentration in all the following steps, including reliable smooth-running rollers and the prevention of friction points. The tows are dried on Fleissner contact dryers, including a treatment to prevent fibre shrinkage. In all these process steps, a modular machine system provides a highly configurable and flexible production line that can be adapted to all requirements. During the entire precursor line process, the tows are guided by Fleissner fibre logistic systems; a combination of surfaces, drives and process control systems. Despite all

Process steps and required equipment
The production of carbon fibre can be subdivided into three major steps: polymerization, precursor line and carbonization line (blue frames in Figure 1).

reaction temperature and a short polymerization time in order to avoid long- and short-chain branching side reactions. The reaction is carried out in special, multi-stage continuouslystirred tank reactors such as those built by EPC Industrial Engineering.

No63 March 2011 / jec composites magazine

97

Technology & Innovations



JEC COMPOSITES MAGAZINE - Issue #63 - March 2011

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #63 - March 2011

Cover
Edito
Point of view: an extraordinary growth
Contents
Agenda of Events
COMPANY & BUSINESS
In Brief
Automotive - Sora Composites stays ahead of the field
China - CPIC Fiberglass, a strategy with results
APPLICATIONS
Marine - Case study: Composite surface smoothness improvement
Ballistic - Protection you can depend on
MARKET
Human capital - BMW, Composite specialists needed
Focus - Chinese composites market just keeps on growing
Trends - Airbus foresees demand for nearly 26,000 aircrafts the next 20 years
FEATURE SUSTAINABILITY
Market - Targets for bio-based composites and natural fibres
Fibre - Hemp: fibres meant for composites
Technical flax: a real opportunity for composites
Trends - Eco-design
Recycling - Sustainable recycling solutions for composites
SPECIAL JEC COMPOSITE 2011
2nd I.I.C.S.
Awards
JEC Innovation report 2011
RESEARCH & DEVELOPMENT
Medical/bio-composite - Mechanical properties vs. fabrication for medical applications
Prepreg - Innovative epoxy prepregs using bio-based curing agents
TECHNOLOGY & INNOVATIONS
Moulding - Towards smarter, more autonomous moulds
Prepreg - New coating-line concepts for high-precision prepreg products
Carbon fibre - State-of-the-art equipment for carbon fibre production lines
Fibre placement - Optimized fibre placement for composites
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Cover
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 2
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Edito
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Point of view: an extraordinary growth
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 5
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Contents
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 7
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Agenda of Events
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - JECBoston
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Aero
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - In Brief
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Automotive - Sora Composites stays ahead of the field
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 11
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 12
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 13
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 15
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 16
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 17
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - China - CPIC Fiberglass, a strategy with results
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 19
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 20
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Marine - Case study: Composite surface smoothness improvement
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 22
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 23
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Ballistic - Protection you can depend on
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 25
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 26
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Human capital - BMW, Composite specialists needed
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Focus - Chinese composites market just keeps on growing
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 29
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Trends - Airbus foresees demand for nearly 26,000 aircrafts the next 20 years
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Market - Targets for bio-based composites and natural fibres
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 32
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Technical flax: a real opportunity for composites
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 34
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 35
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 36
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 37
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 38
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Trends - Eco-design
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 40
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 41
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 42
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 43
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Recycling - Sustainable recycling solutions for composites
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 45
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 46
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 47
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 48
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 2nd I.I.C.S.
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 50
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 51
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 52
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - IICS
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Poster
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 53
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 54
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Awards
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 56
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 57
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 60
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 61
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - JEC Innovation report 2011
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 63
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 64
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 65
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 81
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 82
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Medical/bio-composite - Mechanical properties vs. fabrication for medical applications
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 84
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 85
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 86
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Prepreg - Innovative epoxy prepregs using bio-based curing agents
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 88
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 89
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 90
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Moulding - Towards smarter, more autonomous moulds
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 92
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Prepreg - New coating-line concepts for high-precision prepreg products
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 94
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 95
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Carbon fibre - State-of-the-art equipment for carbon fibre production lines
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 97
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 98
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Fibre placement - Optimized fibre placement for composites
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 100
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 101
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