Next Article in Journal
Development of Polylactic Acid Films with Selenium Microparticles and Its Application for Food Packaging
Previous Article in Journal
Cytotoxicity and Mineralization Potential of Four Calcium Silicate-Based Cements on Human Gingiva-Derived Stem Cells
Previous Article in Special Issue
Oxidation Behavior of Ta–Al Multilayer Coatings
Open AccessFeature PaperArticle

Insight into the Release Agents/PVD Coatings Interaction for Plastic Mold Technology

1
Department of Civil, Environmental and Geomatic Engineering, Institute for Building Materials, ETH Zurich, Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland
2
Department of Mechanical Engineering, Politecnico di Milano, 20156 Milan, Italy
3
Department of Chemistry, Università degli Studi di Milano, Via Golgi 19, 20133 Milan, Italy
4
Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Firenze, Italy
5
Department of Environmental Science and Policy ESP, Università degli Studi di Milano, 20133 Milan, Italy
*
Authors to whom correspondence should be addressed.
Coatings 2020, 10(3), 281; https://doi.org/10.3390/coatings10030281
Received: 28 January 2020 / Revised: 13 March 2020 / Accepted: 16 March 2020 / Published: 18 March 2020
(This article belongs to the Special Issue Physical Vapor Deposition)
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. View Full-Text
Keywords: PVD coatings; interfacial tension; mold releasing agent; spreading; open circuit potential; mold fouling PVD coatings; interfacial tension; mold releasing agent; spreading; open circuit potential; mold fouling
Show Figures

Graphical abstract

MDPI and ACS Style

D’Avico, L.; Beltrami, R.; Pargoletti, E.; Trasatti, S.P.; Cappelletti, G. Insight into the Release Agents/PVD Coatings Interaction for Plastic Mold Technology. Coatings 2020, 10, 281.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop