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Developments and trends in powder coating of heat-sensitive substrates

  • Powder coatings provide several advantages over traditional coatings: environmental friendliness, freedom of design, robustness and resistance of surfaces, possibility to seamlessly all-around coating, fast production process, cost-effectiveness. In the last years these benefits of the powder coating technology have been adopted from metal to heat-sensitive natural fibre/ wood based substrates (especially medium density fibre boards- MDF) used for interior furniture applications. Powder coated MDF furniture parts are gaining market share already in the classic furniture applications kitchen, bathroom, living and offices. The acceptance of this product is increasing as reflected by excellent growth rates and an increasing customer base. Current efforts of the powder coating industry to develop new powders with higher reactivity (i.e. lower curing temperatures and shorter curing times; e.g. 120°C/5min) will enable the powder coating of other heat-sensitive substrates like natural fibre composites, wood plastic composites, light weight panels and different plastics in the future. The coating could be applied and cured by the conventional powder coating process (electrostatic application, and melting and curing in an IR-oven) or by a new powder coating procedure based on the in-mould-coating (IMC) technique which is already established in the plastic industry. Extra value could be added in the future by the functional powder toner printing of powder coated substrates using the electrophotographic printing technology, meeting the future demand of both individualization of the furniture part surface by applying functional 3D textures and patterns and individually created coloured images and enabling shorter delivery times for these individualized parts. The paper describes the distinctiveness of powder coating on natural fibre/ wood based substrates, the requirements of the substrate and the coating powder.

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Metadaten
Author of HS ReutlingenKandelbauer, Andreas
Erschienen in:Processing Technologies for the Forest and Biobased Products Industries : Proceedings
Editor:Alexander Petutschnigg, Marius Barbu, Eugenia Tudor
Document Type:Conference proceeding
Language:English
Publication year:2014
Contributing Corporation:Conference on Processing Technologies for the Forest and Biobased Products Industries (3 : 2014 : Kuchl)
Tag:in-mould-coating; powder coating; wood based printing
Page Number:7
First Page:454
Last Page:460
DDC classes:660 Technische Chemie
Open access?:Nein