JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 66

KNOW-HOW Bonding g…/… INDAR: INnovative Dismantling Adhesives Research Examples of assemblies The mechanical tests shown here are tensile-shear tests that are compliant with the French NF EN 1465 standard. This type of test is used a lot in research on adhesive-bonded assemblies, because it provides valuable information about the breaking stress and deformation of the joint under that type of load. During the test, two substrates bonded together are held between jaws. The end of one substrate is gripped by a fixed jaw, and the opposite end of the other substrate, by a mobile jaw. The substrates are then pulled so as to apply tensile stress in the parallel direction. Figure 3 shows the type of specimens used for the tests. The diagram represents the “sandwich” structure used when the technology is incorporated into a primer. However, the additive can be directly added to the adhesive, without a primer. More information RESCOLL, a contract research company, conducts technical innovation studies on the industrial applications of polymers: composites, adhesives, resins, elastomers, varnish, etc. The company's customers are located throughout Europe. RESCOLL, a spin-off of the ENSCPB (Graduate School of Chemistry and Physics of Bordeaux), employs 25 engineers and technicians with a turnover of 2M€. that require this type of surface preparation. The process can be used with a Rescoll-developed primer, but it is also possible to directly reformulate an adhesive from an existing line. In this case, there is no change to the adhesive-bonding operation itself (there is no primer step added), as the choice of one or another action depends on the specifications for the target application. Figure 5 illustrates the effect of the process on a commercial epoxy adhesive used to bond two stripped and cleaned aluminium substrates. Fig.3: Tensile shear specimen. Different epoxy adhesive products have been tested in combination with various surface treatments (chromic-sulphuric bath, stripping, and sand blasting) to assess the versatility of the process on this type of adhesive. Fig.5: Modified commercial adhesive. Conclusion Adhesive bonding is an increasingly popular assembly technique, as illustrated by the automotive industry. Such interest can easily be explained by the many advantages of adhesive bonding compared to standard assembly methods. The use of adhesives makes it easy to assemble different materials, distribute stress evenly, eliminate many corrosion problems, achieve high production throughput. The technology presented in this paper removes a major technological obstacle in structural adhesive bonding, and that is irreversibility. For sustainable development concerns the use of removable structural adhesives is likely to become increasingly popular in many industrial sectors, mainly for weight-reduction purposes and, especially, to facilitate end-of-life recycling. Industrial partners have already expressed their interest in this technology, which is unquestionably a simple and effective solution. A number of studies have helped to demonstrate the relevance of the INDAR process, which has even been the recipient of several awards – including the 2006 engineering award (sustainable development category) from the Usine Nouvelle and the 2007 Pierre Potier Trophy from the French Industry Ministry. More information: www.rescoll.fr Contacts: maxime.olive@rescoll.fr jose.corta@rescoll.fr papon@enscpb.fr Fig.4: Primer on sand-blasted surface. Figure 4 shows the results obtained on sand-blasted aluminium materials for bond assembly. After sand-blasting with Corindon 125μm, the aluminium 6060T6 substrates exhibited an average roughness (Ra) of 2.5 μm. The substrates are coated with a primer developed by Rescoll; the adhesive used is a commercial product used widely in the aviation industry. Applying the primer involves the following steps: - cleaning the substrates with methyl ethyl ketone before and after sand blasting; - mixing the two primer components (epoxy base); - coating the substrates with the primer with a brush; - curing for 24 hours at ambient temperature, or for one hour at 65°C; - applying the adhesive in accordance with supplier instructions. This method demonstrates that the technology is effective even on rough substrates, opening up attractive prospects in all applications JEC Composites Magazine / No40 May 2008
http://www.rescoll.fr

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #40 - May 2008

Cover
Edito
NEWS WORLDWIDE | Companies
Nippon Graphite Fiber increases production capacity
World’s largest ECR glass fibre plant
CPIC and Abahsain set up glass fibre joint venture
Airbus negotiations called off in Germany
A400M static testing
Agenda of events
Equipment: non destructive control
BUSINESS
Market survey: India
Trends | Two major sustainable development challenges: raw materials and energy
Niche market | Taking up the rapid manufacturing challenge
Human capital |Choosing the right opportunity
FEATURE | Wind energy : Market update
History : Not just another windmill story
Process : An experimental vertical-axis wind turbine system
Composite manufacturing process for wind energy
Materials technology for the wind energy market
Equipment : The perfect mixture
USERS’ PLATFORM
Composites in the world : Bamboo helmet
Very exclusive business cards
World’s First Integrated Wind Turbines
Solar energy and hydrogen powered plane
Successful partners : Art nesting in a composite bower
Applications : A Hybrid composite carbody for korean tilting train
KNOW-HOW : Environment
Coupling agent : Composite stone
Process
Bonding : INDAR
Special Asia
News
Application
Products from exhibitors
Participating companies
Singapore today
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Cover
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 2
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Edito
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 4
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 5
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 6
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 7
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - CPIC and Abahsain set up glass fibre joint venture
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - A400M static testing
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Agenda of events
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 11
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Equipment: non destructive control
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - BUSINESS
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Market survey: India
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 15
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 16
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 17
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Trends | Two major sustainable development challenges: raw materials and energy
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 19
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 20
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 21
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Niche market | Taking up the rapid manufacturing challenge
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 23
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Human capital |Choosing the right opportunity
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 25
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - FEATURE | Wind energy : Market update
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 27
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 28
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - History : Not just another windmill story
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 30
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Process : An experimental vertical-axis wind turbine system
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 32
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 33
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 34
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 35
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 36
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 37
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Composite manufacturing process for wind energy
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 39
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 40
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Materials technology for the wind energy market
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 42
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 43
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Equipment : The perfect mixture
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 45
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 46
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - USERS’ PLATFORM
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Very exclusive business cards
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Solar energy and hydrogen powered plane
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Successful partners : Art nesting in a composite bower
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 51
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Applications : A Hybrid composite carbody for korean tilting train
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 53
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 54
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - KNOW-HOW : Environment
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 56
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 57
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 58
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 59
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Coupling agent : Composite stone
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 61
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Process
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 63
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 64
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Bonding : INDAR
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 66
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 67
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - 68
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Special Asia
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - News
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - III
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Application
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Products from exhibitors
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Participating companies
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - VII
JEC COMPOSITES MAGAZINE - Issue #40 - May 2008 - Singapore today
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