Comparative investigations of fibreboards resulting from selected hemp varieties

Two hemp varieties have been processed by different process technologies. The resulting fibrous intermediate has been characterized by particle analysis prior the manufacture of fibreboards. The results of comprehensive tests of respective product samples are used to describe the influence of raw material, processing method and target density on selected product properties. It has been shown that the intended respectively realized density of the fibre boards has the greatest influence on their physical and mechanical properties. Comparing values within the same density range both raw material (variety) choice as well as the number of processing steps lead to partially different results. A processing with a disc mill additional to a single step extruding is increasing the ratio of finer particles which applies to one hemp variety to a greater extent than to the other hemp variety. Close relations to respective properties of the fibre boards are identified and presented in the paper.