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Influence of thermo-analytical and rheological properties of an epoxypowder coating resin on the quality of coatings on medium densityfibreboards (MDF) using in-mould technology

  • Powder coating of engineered wood panels such as medium density fibreboards (MDF) is gaining industrial interest due to ecological and economic advantages of powder coating technology. For transferring powder coating technology to temperature-sensitive substrates like MDF, a thorough understanding of the melting, flowing and curing behaviour of the used low-bake resins is required. In the present study, thermo-analysis in combination with iso-conversional kinetic data analysis as well as rheometry is applied to characterise the properties of an epoxy-based powder coating. Neat resin and cured powder coating films are examined in order to define an ideal production window within which the resin is preferably applied and processed to yield satisfactory surface performance on the one hand and without exposing the carrier MDF too high a temperature load on the other hand to prevent the panel from deteriorating in mechanical strength. In order to produce powder coated films of high surface gloss – a feature that has not yet successfully been realized on MDF with powder coatings – a new curing technology, in-mould surface finishing, has been applied.

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Metadaten
Author of HS ReutlingenKandelbauer, Andreas
DOI:https://doi.org/10.1016/j.porgcoat.2013.10.016
ISSN:0300-9440
Erschienen in:Progress in organic coatings
Publisher:Elsevier
Place of publication:Amsterdam
Document Type:Journal article
Language:English
Publication year:2014
Tag:MDF surface finishing; gloss; iso-conversional cure kinetics; powder coating; thermo-analysis
Volume:77
Issue:10
Page Number:8
First Page:1539
Last Page:1546
DDC classes:667 Reinigungs-, Färbe-, Beschichtungstechniken
Open access?:Nein
Licence (German):License Logo  In Copyright - Urheberrechtlich geschützt