2022 Groß Andreas abs

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In the future, the number of materials needed to meet changing requirements will continue to increase. Due to the increasing complexity of product requirements and the resulting material developments, these products will also have to be multi-material composites in the future. Beyond pure joining, joining technology therefore has the further central task of maintaining the material properties necessary to meet the requirements.

In this context, the key role of adhesive bonding technology is presented. With its help, all materials can be joined to themselves and to others safely and with long-term stability. At the same time, the material properties necessary to meet the requirements can be maintained. Both aspects together make new and safe as well as eco-balanced, efficient construction methods possible.

Against this background, Prof. Dr Andreas Groß from Fraunhofer IFAM presents a vision for the further development of adhesive bonding and sealing technology as the joining technology for the 21st century under the concept of  ‘controlled longevity’, i.e. the equal, inseparable combination of the safety of adhesively bonded products and their simultaneous eco-balanced efficiency, which leads to a sustainable synergism that expands the areas of application.

The book  ‘Adhesive bonding technology in the 21st century – Synergy of technological and ecological potentials’ by Prof. Dr Bernd Mayer and Prof. Dr Andreas Groß of Fraunhofer IFAM, Bremen, was commissioned by FEICA to provide an overview of the various aspects of the industry, today and in the future.

2022 De Ketelaere Geertrui Mieke abs

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AI applications are increasingly being developed, but the exciting world of opportunities and possibilities includes other important issues related to sustainability: privacy, ethics, energy consumption and liability. The discrepancy between what the AI developers create, what the customer buys, and what the government wants has increased the complexity bias on the topic. In this session, Mieke will split the current known issues in the good, the bad and the ugly. She takes her audience beyond the tipping point by demystifying the technology and by removing the current tension between the believers and the non-believers. By comparing both human and artificial intelligence anno 2022, the audience also easily understands that we need to accept the fact that both forms of intelligence are great, but just different.

2022 Yu Sakai and Christopher Dobbins abs

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Adhesives and Sealants require a specific rheological profile in order to control properties such as extrudability, workability, as well as sagging and slump behaviour. This presentation demonstrates the exceptional performance achieved through use of Viscoexcel 30 SG, a 30 nanometre grade, compared with standard UFPCCs and other rheological modifying additives, while enabling more efficient production processes.

Viscoexcel 30 SG is manufactured by Shiraishi-Omya GmbH in Austria, and available throughout Europe.

 

Co-authors: Christopher Dobbins, Yu Sakai

2022 Wüst Rhiannon abs

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The drive to reduce the environmental impacts and adverse health effects of some conventional adhesive chemistry platforms has led to recent formulation innovations in polyurethane reactive (PUR) hot melt materials. PUR hot melts are used for a wide range of product assembly applications within the consumer electronics, automotive components and textile/foil industries so ensuring their sustainable development is important for climate positivity and health and safety.

This presentation will highlight two PUR hot melt formulation advances. The first is a material developed using bio-sourced ingredients that delivers better performance than that of its petrochemical-based predecessor in terms of adhesion strength, substrate compatibility, dispensing and jetting stability and AOI inspection. With no plant-derived drop-in raw material replacements, the sourcing and engineering of this formulation were challenging, but the result is a robust PUR hot melt with more than 60% bio-based content. Reduction of harmful substances is the emphasis of the second PUR hot melt development, where a novel approach has enabled a new low isocyanate (<0.1% monomer isocyanate content) PUR hot melt platform. This chemistry breakthrough has significantly reduced emissions compared to conventional formulas and is not labeled as hazardous (no HS351 designation). The materials are safe, easy to use and ecologically sustainable.

2022 Thiebes Christoph abs

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Despite some new developments in the past, polyurethane adhesives are still playing a niche role in contact bonding applications.

However, new market requirements, such as compatibility with future recycling processes, lower VOC and specific requirements driven by Ecolabels are constantly developing, creating a need for alternatives to the currently used technologies.

Hence, during this talk we will benchmark the performance of new waterborne polyurethane based adhesives against a standard rubber-based contact adhesive formulation.

 

Co-authors: Winfried Jeske, Wolfgang Arndt, Peter Kueker

2022 Sundermeier Uta abs

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In alignment with the EU goals for sustainability, a circular economy and climate neutrality by 2050, the European Commission is proposing Right to Repair legislation that could take effect as early as the end of this year. As part of these initiatives and to facilitate simpler product repair and recyclability, new developments are underway in structural adhesives formulation.

Adhesives are used in numerous applications – from medical devices to consumer electronics to packaging, automotive and aerospace. Widely employed due to their light, efficient and effective bonding capability, adhesives are more economical than many mechanical alternatives, but disassembling adhesive-joined parts can be challenging. Consequently, many products end up in landfills. Emerging developments in debond-on-demand adhesives, which use a variety of trigger mechanisms to facilitate depolymerization, are showing great promise in allowing disassembly for product repair and component parts recycling or reuse. This presentation will cover the various mechanisms for adhesive debonding, formulation challenges and solutions, as well as the most viable debonding adhesive solutions for certain applications.

2022 Sommer Mario abs

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The surfaces on which we constantly move, walk on or drive on with a vehicle have been paved for centuries. Different materials are used for this purpose – concrete, asphalt, natural stone, etc. The larger the surfaces are paved, the more comfortable they are to walk on and the faster they can be rolled over, the more attention must be paid to the weathering of these surfaces. This means that the surfaces are exposed to the annually changing weather and thus also to a constant change in temperature. As a result, the surface itself begins to work – it wants to expand or contract. If this situation is not taken into account, damage to the surfaces is unavoidable (e.g. blow-ups on motorways).

In the presentation, this complex situation will be explained and the production of movement joints with appropriate sealants will be shown. Paths, roads, squares and motorways will be considered, in solid bonded construction.

The presentation is based on the new guideline on this subject, which is also available in English:

“Elastic sealants in the floor area – Part 1: External”, Information Script of Deutsche Bauchemie, 1st Edition 10/2021.

2022 Smits Angela abs

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Polyurethane and epoxy adhesives are used in high-performance application such as automotive and electronics. Our Priplast biobased polyols bring excellent adhesion, durability and moisture protection to polyurethanes, ranging from soft to high-strength with lasting (low temperature) flexibility. They are made from natural oils and have a low to zero carbon footprint. The hydrocarbon character imparts water resistance and affinity for a wide variety of substrates. On top of that, the obtained low electrical conductivity is valuable in electronics. For epoxy adhesives, biobased Priamine aliphatic diamine brings good flow and moisture resistance. It reduces brittleness that is typical for epoxies, to prevent failure by ageing or shock.

Our Smart Materials business has set challenging targets to contribute to Climate, Nature and People. We will demonstrate how sustainability is improved by reducing the carbon footprint of adhesives and enabling carbon saving in-use. Allowing lightweight design in automotive and durable solutions for encapsulation. Furthermore, we develop and collaborate for new formulations to be safe and sustainable by design and increase value chain collaboration for circular design and improved recycling. New technologies include reversible bonding and single polymer design. On top of a high performance, we contribute to enable a sustainable future.

2022 Sergio Dulio and Dr Dirk Achten abs

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Today, adhesive application and assembly in the footwear industry continues to be mostly performed manually.

Complex 3D-surfaces, a high variety of substrates combined with the need for a highly precise adhesive application and substrate positioning have so far limited the rise of automation in this sector. There have been numerous industry activities to automate the application, which have largely failed for several reasons:

– New processes struggle to meet the throughput, precisision of application and deliver the desired product properties.

– Usage of existing adhesive solutions for e.g. spray applications suffer from limited processing stability due to clogging and lead to the necessity to mask parts of the shoe.

This talk will focus on how working jointly together along the value chain on adhesive raw material design, formulation and robot assisted automation allowed us to find unconventional solutions to the above mentioned problems.

By combining advanced PU hot-melt formulations with a force controlled robotic application via cobot technology and automated glue path generation, we present – to our knowledge – the first fully automated production cell for footwear adhesive application and assembly.

We will further discuss challenges of the application and unique solutions that helped us to establish a material and energy efficient, as well as highly productive adhesive application and assembly process.

 

Co-authors: Sergio Dulio, Alessio Stefanini, Marcello Taglietti, Emiliano Bozatto, Dr. Dirk Achten

2022 Schneider Martin abs

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High initial and final strength, as well as long open times make solvent borne polychloroprene based contact adhesives indispensable in many applications, in industry and for end-users. The solvent enables a convenient handling of the adhesive with short waiting times before joining, long open times and easy application.

However, the solvents are also the reason why this class of adhesives is under discussion since some years. The solvents determine the hazard potential of the adhesive, often triggering classification of the adhesive as a hazard to health or the environment. Additionally conventional solvents are based on crude oil, thus having a negative impact on the sustainability of the adhesive.

This presentation will show how to formulate polychloroprene based adhesives with bio-based solvents to offer more sustainable solutions. In addition, the use of safer solvents for this class of adhesives will be addressed, allowing the formulator to create solvent based contact adhesives without hazards to health or the environment.

 

Co-authors: Dr. Rainer Kalkofen

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