Application of organosilane coatings for improved anti-adhesive properties enabling facilitated demolding in polymer processing

Christine Bandl, Nina Krempl, Gerald Berger-Weber, Wolfgang Kern, Walter Friesenbichler

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

Abstract

Easy and residue-free demolding is an everlasting topic in the plasticsprocessing industry. Typically, facile ejection of the produced parts from themold is provided by separation agents (silicon sprays, surface coatings). In thiswork, a perfluoroalkyl-based organosilane coating is applied to exchangeablesubstrates of an injection mold. Besides the simple application, the coating canalso be restored easily in a procedure based on flame treatment. Coating andrecoating are proven by contact angle measurements with water, while theanti-adhesive effect and the related relief during demolding are evaluatedusing a special measuring device in an instrumented two-plate injection mold.The results reveal that the organosilane layer reduces the demolding forcesand the resulting static friction coefficient by 50%. Furthermore, multiplerecoating significantly improves the durability of the anti-adhesive coating.Based on these findings, the easily applicable and renewable organosilanecoating represents a suitable alternative to conventional release coatings.
OriginalspracheEnglisch
Aufsatznummer50714
Seitenumfang9
FachzeitschriftJournal of Applied Polymer Science
Jahrgang138.2021
Ausgabenummer30
DOIs
PublikationsstatusVeröffentlicht - 10 März 2021

Bibliographische Notiz

Funding Information:
The presented work was performed within the CORNET project “Corrosion and Abrasion Resistance of Anti‐Adhesive Hybrid Coatings for Polymer Processing” (CARACOAT). This CORNET project was funded by the Austrian Research Promotion Agency (FFG), the German Federation of Industrial Research Associations (AiF) and the Company Partners in the project consortium.

Publisher Copyright:
© 2021 The Authors. Journal of Applied Polymer Science published by Wiley Periodicals LLC.

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