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Coatings 2018, 8(9), 301; https://doi.org/10.3390/coatings8090301

Non-Stick Coatings in Aluminium Molds for the Production of Polyurethane Foam

1
Department of Mechanical Engineering, University of Cordoba, Medina Azahara Avenue 5, 14071 Cordoba, Spain
2
Biocolloid and Fluid Physics Group, Applied Physics Department, Faculty of Sciences, University of Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain
*
Author to whom correspondence should be addressed.
Received: 17 July 2018 / Revised: 12 August 2018 / Accepted: 24 August 2018 / Published: 27 August 2018
(This article belongs to the Special Issue Coatings for Dies and Molds)
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Abstract

The manufacturing of polyurethane foam is a process of great industrial importance in the automotive and furniture sector. The operation of demolding is the most delicate, since the foam sticks firmly to the walls of the mold onto which it has spread. In order to avoid the use of demolding agents, the proposal is to coat the inside of the molds with non-stick coatings. In this work, three types of different coatings were studied: fluoropolymers, ceramics, and elastomers. After carrying out different tests in the laboratory, two fluoropolymer coatings (PFA (perfluoroalkoxy) and PTFE (polytetrafluoroethylene)) were selected for a test at the industrial level and, after 1500 cycles of demolding, it was experimentally proven that the PFA coating is the most adequate for the use studied. View Full-Text
Keywords: non-stick coatings; polyurethane foam; aluminium molds; FEP; PFA; RTV silicone rubber; sol-gel non-stick coatings; polyurethane foam; aluminium molds; FEP; PFA; RTV silicone rubber; sol-gel
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Sánchez-Urbano, F.; Paz-Gómez, G.; Rodríguez-Alabanda, Ó.; Romero, P.E.; Cabrerizo-Vílchez, M.; Rodríguez-Valverde, M.Á.; Guerrero-Vaca, G. Non-Stick Coatings in Aluminium Molds for the Production of Polyurethane Foam. Coatings 2018, 8, 301.

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