Holz als Roh- und Werkstoff

, Volume 60, Issue 4, pp 291–296 | Cite as

Biodegradable lightweight construction boards based on tannin/hexamine bonded hemp shaves

  • M. Theis
  • B. Grohe
Originalarbeiten · Originals


, with a dry I.B. strength of up to 0.34 MPa, a formaldehyde release well within the emission class E1 and certificate as normal flammable and not burning dripped off (DIN 4102-B2) were fabricated by mixing hemp shaves with a borate-modified mimosa tannin-hexamine binder and press the masses as fast as 6 s/mm thickness at 70°C to one-layer boards. Different drying processes indicate that fast drying at ˜100°C is needed both for satisfactory strengths and for a sufficient dimension stability performance of soaked samples, but, as well for a lower boron leaching during soaking. For dry environments the resistance to fungal attack is sufficient enough to have boards for interior application.


Burning Boron Dimension Stability Stability Performance Hemp 
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verpresst. Querzugfestigkeiten bis zu 0.34 MPa, Formaldehyd-Emissionen die innerhalb der Emissionsklasse E1 liegen und Brandschutzeinstufungen als normal entflammbar und nicht brennend abtropfend (DIN 4102-B2) wurden bestimmt. Verschiedene Trocknungsprozesse zeigen, dass schnelles Trocknen bei ˜100°C zu höheren Festigkeiten und, nach wässern der Proben, zu ausreichender Dimensionstabilität bei geringerer Borauswaschung führt. Für trockene Umgebungen ist die Resistenz gegen Pilzbefall ausreichend genug um die Bretter für Innenanwendungen einzusetzen.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • M. Theis
    • 1
  • B. Grohe
    • 2
  1. 1.AgroSys GmbH & Co. KG, Flugplatz Pferdsfeld 1, 55566 Bad Sobernheim, GermanyDE
  2. 2.Fachhochschule Pirmasens, Carl-Schurz-Straße 1–9, 66953 Pirmasens, GermanyDE

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