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Einfluß der Verkernung und des Baumalters auf die Eigenschaften von Spanplatten aus Kiefernholz (Pinus sylvestris). Teil 2

Physikalisch-technologische Eigenschaften und Formaldehydabgabe von Spanplatten aus Kern- und Splintholz der Kiefer
Influence of heartwood and the age of tree on the properties of particleboards from pine. Part 2
 
: Dix, B.; Roffael, E.

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Holz als Roh- und Werkstoff 55 (1997), pp.103-109
ISSN: 0018-3768
German, English
Journal Article
Fraunhofer WKI ()
Fraunhofer WKI ()
board; Formaldehydabgabe; formaldehyde release; heartwood; Kernholz; Kiefer; mechanical property; mechanische Platteneigenschaft; particle board; pine; Spanplatte

Abstract
Chips from sap- and heartwood of 20- and 126-year-old pine of the same site were chemically characterized. Onelayer boards of 20 mm thickness were prepared from the chips using melamine-urea-phenol-formaldehyde resin (PF-resin), tannin-formaldehyde resin (TF-resin) and adhesives based on polymeric diisocyanate (PMDI). The physical and chemical properties of the boards were determined. Moreover, the influence of hot water extractives on the pH-value, viscosity and gelation time of the resins was assessed. The results reveal: Sap- and heartwood chips differ in their chemical properties and bonding behaviour.

: http://publica.fraunhofer.de/documents/PX-10914.html