Abstract
The effects of screw-gluing and gap-filling phenol resorcinol formaldehyde (GPRF) adhesive using different glue line thicknesses on the shear strength of wood-plywood joints were studied to determine the use of screw-gluing fastening (SG) method and GPRF adhesive. The specimens were manufactured using either SG method with GPRF adhesive and fine threaded drywall screws or press-gluing (PG) method with GPRF adhesive. The Analysis of Covariance (ANCOVA) was used for statistical analyses. The results showed that the strength among fastening methods was significantly affected by the glue line thickness, so the strength decreased as the glue line thickness increased. The SG fastening method was found as effective as the PG method and more effective when thick glue lines present. The method can be successfully used to bond wood to plywood for wooden panels i.e. stressed skin and sandwich panels.
Zusammenfassung
Die Auswirkungen von Schraub-Klebe-Befestigung und Spaltenauffüllung mit Phenol-Resorcinol-Formaldehyd Harzen (GPRF) unter Verwendung verschieden dicker Klebefugen entlang der Scherfestigkeit der Holzverbindungen wurden untersucht, um die Verwendbarkeit der Schraub-Klebe-Verbindungsmethode und der GPRF Harze zu überprüfen. Die Proben wurden mit der SK-Methode mittels GPRF Harzen und Schrauben mit engem Gewinde oder durch Pressverleimung mit GPRF Harzen hergestellt. Zur statistischen Auswertung wurde die Analyse der Kovarianz (ANCOVA) herangezogen. Die Ergebnisse zeigten, dass die Festigkeit der Verbundsmethoden sehr stark von der Breite der Klebefugen abhängt, die Verbundsfestigkeit sinkt mit wachsender Breite der Klebefugen. Die SK-Methode erwies sich als ebenso effektiv wie die PG-Methode und als effektiver bei breiten Klebefugen. Die Methode kann erfolgreich angewendet werden, um Holz mit Sperrholz in verschiedenen Holzpanelen zu verbinden.
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Kurt, R. The strength of press-glued and screw-glued wood-plywood joints. Holz Roh Werkst 61, 269–272 (2003). https://doi.org/10.1007/s00107-003-0397-2
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DOI: https://doi.org/10.1007/s00107-003-0397-2