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Optimization of the process of pressing particleboards by means of modifying phenol-formaldehyde resin with amide polymers

Optimierung des Pressverfahrens von Spanplatten mittels einer Modifizierung von Phenolformaldehydharz mit Amidpolymeren

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Abstract

The paper investigates the effect of PF resin modification on the possibility of shortening the time or reducing the temperature when pressing particleboards glued with phenolic resin modified with amide polymers, and on the physical and mechanical properties of the boards. The applied activators of PF resin were as follows: polycaprolactam and its N-hydroxymethylene derivative, polyacrylamide and acrylamide. The scope of the research included studies regarding the influence of these modifiers upon properties of fluid PF resin, the production of particleboards at various pressing conditions and the determination of their physical and mechanical properties. The obtained results show that the modification of PF resin with amide polymers makes it possible to increase the reactivity of the resin and to produce, in a shorter time or at a lower temperature, particleboards with comparable or better properties than those of the boards produced under industry-like conditions.

Zusammenfassung

Die vorliegende Studie untersucht den Einfluss einer Modifizierung von Phenolformaldehydharz (PF Harz) auf mögliche Presszeitverkürzung bzw. Presstemperatursenkung bei der Herstellung von Spanplatten, die mit Amidpolymeren modifiziertem PF Harz verleimt wurden, sowie den Einfluss einer solchen Modifizierung auf die physikalischen und mechanischen Eigenschaften dieser Platten. Als Aktivatoren des PF Harzes wurden Polyamid 6 (PA 6) und dessen N-Hydroxymethylenderivat, Polyacrylamid sowie Acrylamid eingesetzt. Geprüft wurde der Einfluss der genannten Modifikatoren auf die Eigenschaften des flüssigen PF Harzes, auf die Herstellung von Spanplatten unter verschiedenen Pressbedingungen sowie auf die physikalischen und mechanischen Eigenschaften dieser Platten. Aus den Prüfergebnissen geht hervor, dass die Modifizierung des PF Harzes mit Amidpolymeren eine Steigerung der Reaktionsfähigkeit von PF Harz ermöglicht. Ferner zeigte sich, dass bei verkürzter Presszeit bzw. gesenkter Presstemperatur Spanplatten hergestellt werden können, deren Eigenschaften vergleichbar oder sogar besser sind als die der unter annähernd industriellen Bedingungen hergestellen Platten.

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Authors and Affiliations

  1. Department of Wood-based Materials, August Cieszkowski Agricultural University, Poznań, Poland

    Dorota Dukarska & Janina Łecka

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  1. Dorota Dukarska
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  2. Janina Łecka
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Correspondence to Dorota Dukarska.

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Dukarska, D., Łecka, J. Optimization of the process of pressing particleboards by means of modifying phenol-formaldehyde resin with amide polymers. Holz Roh Werkst 64, 403–409 (2006). https://doi.org/10.1007/s00107-005-0093-5

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  • DOI: https://doi.org/10.1007/s00107-005-0093-5

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