Importance of wetting and spreading: surface tension, surface energy, pre-treatment & additives.
Pre-conditions in order to achieve adhesion: complete wetting, surface roughness, adjustment of interactions and prevention of stress (caused by shrinkage).
Influence of additives on adhesion: wetting agents, adhesion promoters and release agents.
Understanding of adhesion mechanisms: intermolecular interactions (hydrogen bonding), diffusion, penetration, mechanical anchoring & covalent bonding.
Main causes & their solutions for adhesive failure: additives, stress, substitution, hydrophobicity, dirt, smoothness and weak boundary layers.
How to measure adhesion: pull-off test & cross-cut test.
Every day problems associated with intercoat adhesion.
30 Mins Q&A session- Interact live, put across your formulation queries to the expert !
All these points will be illustrated with REAL LIFE EXAMPLES (wood coating system, cohesive failure, improve adhesion on plastic and covalent bonding with metal).
About the Expert
Jochum Beetsma graduated in physical chemistry from the University of Groningen. Since 2004, Jochum is an independent consultant for companies in coating and ink industry and is specialized in the field of New Product Development. He is certified as a New Product Development Professional by PDMA, being the global leading organization with respect to product development and innovation. He conducts in-company training programs, SpecialChem online courses and is a lecturer within the Dutch Coating Technology training program.
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