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Erschienen in: European Journal of Wood and Wood Products 2/2016

09.01.2016 | Original

Evaluation of UF resin content in MDF boards after hot-pressing by Kjeldahl method

verfasst von: Fatemeh Taheri, Ali Akbar Enayati, Antonio Pizzi, Jerome Lemonon, Mohammad Layeghi

Erschienen in: European Journal of Wood and Wood Products | Ausgabe 2/2016

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Abstract

Understanding resin behavior during hot pressing of medium density fiberboard (MDF) is important to optimize panel properties. Before gelation, the mobility of the resin can affect its distribution and penetration on the wood cells during pressing. The resin in MDF boards occurs as coverage on the fibers surface and also penetrates within the fibers. In this paper, the effect of final resin content and physical–mechanical properties of MDF panels was measured under different conditions of press time, temperature and initial resin content. The measurements were performed by the Kjeldahl method. Results showed that a higher amount of initial resin led to a higher resin content in MDF boards. At the same amount of initial resin, a higher final resin content was obtained by increasing the pressing temperature. Furthermore, the final resin content affects the board properties such as internal bond strength and modulus of rupture. The results showed good correlation between mechanical properties and thickness swelling.

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Metadaten
Titel
Evaluation of UF resin content in MDF boards after hot-pressing by Kjeldahl method
verfasst von
Fatemeh Taheri
Ali Akbar Enayati
Antonio Pizzi
Jerome Lemonon
Mohammad Layeghi
Publikationsdatum
09.01.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Wood and Wood Products / Ausgabe 2/2016
Print ISSN: 0018-3768
Elektronische ISSN: 1436-736X
DOI
https://doi.org/10.1007/s00107-015-1003-0

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