Lightweight particleboards made from annual and perennial plants or based on foamed adhesives

摘要

The objective of two projects carried out by Fraunhofer WKI as well as research and industrial partners is to develop lightweight particleboards (target density varying from 300 kg/m~3 to 500 kg/m~3) for the furniture industry. The first project is a joint European project called DIPP in which lightweight particleboards made from annual and perennial plants such as hemp, sunflower, topinambur, maize and miscanthus are produced. As the stalks of sunflower (Helianthus annuus), topinambur (Helianthus tuberosus) and maize (Zea maize) are filled with light parenchyma cells, they are particularly suitable for the production of lightweight particleboards. Different conventional and natural adhesives like urea- or tannin-formaldehyde resin and PMDI were used, and the properties of the boards produced were compared with reference particleboards made from wood particles.