In polymer processing, the formation of undesired fouling hinders the plastic manufacturing processes. Hence, the use of emulsions as releasing agents is mandatory and their affinity to the mold substrates plays a crucial role. Therefore, this research work has been focused on the wetting properties of commercial water-based release agents (namely Marbocote® W2140, EP, EV-333) towards different Physical Vapor Deposition (PVD) nitride coatings (AlTiN, NbN, ZrN and TiN), usually adopted in the industrial manufacture of Hydrogenated Nitrile Butadiene Rubber (HNBR). The investigated solid substrates were characterized by means of profilometry, SEM/EDX and Surface Free Energy (SFE) analyses, whereas, tensiometric determinations were acquired on the commercial pure and diluted emulsions. The release agents/mold substrates wettability features were studied by means of the work of adhesion and the spreading coefficient. Finally, nitride-coated mold seals were directly tested in an industrial plant with the most performing release agent in terms of adhesive features; for the first time, a deep correlation between the service life, in terms of number of molded seals, and surface (contact angles, work of adhesion and spreading coefficient)/electrochemical (OCP) features was drawn.
Insight into the Release Agents/PVD Coatings Interaction for Plastic Mold Technology / L. D’Avico, R. Beltrami, E. Pargoletti, S.P.M. Trasatti, G. Cappelletti. - In: COATINGS. - ISSN 2079-6412. - 10:3(2020 Mar).
|Titolo:||Insight into the Release Agents/PVD Coatings Interaction for Plastic Mold Technology|
TRASATTI, STEFANO PIERPAOLO MARCELLO (Penultimo) (Corresponding)
CAPPELLETTI, GIUSEPPE (Ultimo) (Corresponding)
|Parole Chiave:||PVD coatings; interfacial tension; mold releasing agent; spreading; open circuit potential; mold fouling|
|Settore Scientifico Disciplinare:||Settore CHIM/02 - Chimica Fisica|
|Progetto:||Laboratorio multifunzionale e centro di formazione per la caratterizzazione e la sperimentazione preapplicativa di smart materials|
|Data di pubblicazione:||mar-2020|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.3390/coatings10030281|
|Appare nelle tipologie:||01 - Articolo su periodico|