PART 1

Concentrol’s speciality chemicals division has the widest range of products; among them, adhesive solutions stand out. In recent years, the use of adhesives in industrial processes has increased exponentially. This is due to the development of structural adhesives. Nowadays these materials are used in industrial applications as diverse as the aerospace industry, the automotive industry, the railway industry, the naval industry, civil construction, the electrical industry or the footwear industry.

Adhesives provide great advantages over other forms of bonding since they enable the creation of a continuous joint, the prevention of corrosion, the distribution of tensions over a joint area, the reduction of vibrations or the invisibility of the joints, among other advantages.

 

XIX Congress of adhesion and additives

One of the most important events for the adhesives industry in our territory is the Adhesion and Adhesives Congress, which is held annually and of which Concentrol is a sponsor due to the great interest and relevance that the Congress has for the sector.

The 19th Adhesion and Adhesives Congress was held on September 19 and 20 at the Carlos III University in Madrid. The Congress was commissioned by the Spanish Adhesion and Adhesives Group and the Materials Service Behaviour Group of the same university was responsible for organizing the event of an international nature. The participants of the Congress presented the latest work done on surface treatments, new adhesive characterization techniques, nanotechnology applied to adhesives and applications, durability and degradation of adhesive joints, among other thematic areas of great interest for the sector.

The presentations and conclusions worked during the Congress were summarized in a highly interesting document, ‘Tendencies in adhesion and adhesives vol. 11’, which has been possible thanks to the Spanish Adhesion and Adhesives Group and the Materials Service Behaviour Group of the University Carlos III in Madrid. The topics compiled in the document are diverse and represent a wide picture of the adhesives sector from different perspectives.

 

The summary of the topics addressed in the 19th Congress of Adhesion and Adhesives is the following:

> Applications of adhesives to singular and design architecture

> Surface treatments of materials

> Nanotechnology applied to adhesives

> Durability, aging and degradation of adhesive joints

> Adhesion phenomenon

> Industrial adhesives applications

 

Adhesion trends and adhesives vol. XI

The summary publication of the Congress contains 23 interesting articles, together with their corresponding experimental procedures and their conclusions. Following we summarize and outline them all, as we consider them of great value for the sector to which they refer, and an interesting look at the progress, the present and the future of adhesive solutions.

 

1- Improvement of adhesion in additive manufacturing using atmospheric plasma

The document edited by the Adhesion and Adhesives Congress publishes an interesting study together with the results of an experimental procedure on the improvement of adhesion in additive manufacturing using atmospheric plasma. It outlines the advances of the additive manufacturing technique thanks to 3D printers and it shows works relating to the improvement of adhesion of the first layer of an acetal piece on a polycarbonate support bed using cold atmospheric plasma.

 

2- Analysis of the curing speed of different adhesives on different substrate by thermal imaging

From the analysis of different substrates by means of a thermographic camera, the influence of temperature in the curing process was analyzed, as well as the temperature evolution of the adhesive as the reaction in situ occurs in a bonding process. For their conclusions, different tests with different adhesives were carried out and they show the temperature evolution during the curing time, as well as the influence of the substrate on each adhesive and the evolution of the reaction in the different adhesives in mass.

 

3- Development of ballistic protection systems with significant reduction in the use of aramid fibres, using integral polyurethane as a fibre adherent

As a result of the Colombian police’s need for effective and low cost ballistic protection, a multilayer system was developed which is composed of a polyester matrix reinforced with aluminium slag ceramic powders and fibreglass in both the hard zone and the soft one, to obtain a greater and better dissipation of the impact energy.

 

4- Use of nano-reinforcements for monitoring dissimilar metal-composite joints

The exceptional characteristics of composite materials have expanded their uses, from the aeronautical sector to the automotive sector or naval energy. The direct bonding between the metal and the composite material in a single layer presents one of the greatest challenges in multi-material structures and adhesive joints in general and this is the starting point and objective of this study presented at the Congress, which raises the possibility of monitoring this type of direct bonds through the use of carbon nanostructures.

 

5- Cycloaliphatic epoxy adhesives filled with BN nanoparticles: UV curing, thermal curing and properties

An extensive study, with its corresponding tests and results, which analyzes the curing and properties of epoxy adhesives. The curing is analyzed with exposures at different temperatures and UV curing.

 

6- Graphite-based epoxy resins: influence of the type of graphite on thermal and electrical conductivity

In this extensive study different types of graphite are selected based on their different chemical, morphological and geometric properties, and are introduced in epoxy resin to evaluate the dependence of these properties on the thermal and electrical conductivities of the epoxy compounds.

 

7- Synthesis and characterization of polymer matrix composite materials for thermal protection systems with ablative properties

The importance of high temperature thermal protection, whether external or internal, has become a priority in many sectors. This article shows the results of theoretical and experimental activities that were carried out for the development of polymer matrix composite materials with ablative properties. From tests with direct exposure to flame, temperatures, weight loss and other characteristics of the response of the material are measured.

 

8- Effect of a surface treatment of particle oxidation on the mechanical properties of cork-reinforced epoxy adhesive

Due to the increasing use of powder-free and solvent-free organic coatings, the characteristics of the curing process of an epoxy powder coating containing different percentages of SiO2 nanoparticles are studied to verify that the additions do not affect it. In this study different techniques are applied, such as thermal or resistance measurement to achieve valuable results.

 

9- Structural Joints with adhesives. State of the art in the Industry. New adhesive technologies with structural properties. New technologies of tenacious epoxy adhesives and new systems of adaptation of joints to production systems

A descriptive article about the general properties of new tenacious epoxy and structural polyurethane technologies and new curing systems that combine good resistant properties with a total adaptation to the required manufacturing system.

 

10- Study of the durability of superhydrophobic coatings after exposure under aging conditions

The objective of this work is to evaluate the capacity that superhydrophobic surfaces exhibit to retain their superhydrophobic behaviour after exposure under aging conditions (temperature and/or humidity). As well as assess if its resistance to abrasion is affected or not.

 

11- Low pressure plasma treatment to improve adhesion in shoe materials

In this study we propose the low-pressure plasma treatment applied to polymeric materials of difficult adhesion as a sustainable technology to improve the adhesion of materials for footwear. The results obtained are shown after the optimization of the parameters that intervene in this non-polluting technology, in order to increase the surface properties of the materials, finally validating their effectiveness, resistance to bonding and their durability through various experimental characterization techniques, such as measurement of contact angle and surface tension, infrared spectroscopy, scanning electron microscopy and T-peel tests.

 

12- Effects on footwear due to migration of plasticizers

The migration of plasticizing substances is a major problem in the footwear industry, along with its toxicity problems. Why does it happen and how could its result be improved?

 

Shortly we will publish a summary of articles 13-23 in a new article on Concentrol’s Research Blog

If you are interested in receiving the complete publication, courtesy of the Spanish Adhesion and Adhesives Group and the Materials Service Behaviour Group of the Carlos III University of Madrid, you can request the document by email from marketing@concentrol.com.

Do you want to know more about it? Schedule a call with our team.