Flax and hemp fibres as raw materials for thermal insulations

Bast fibres of, for example, flax and hemp are used as raw materials of thermal insulations. However, they have only a minor share in the market. The aim of this paper was to evaluate the suitability of bast fibres of flax and hemp for thermal insulations. The functions and requirements of the bast fibrous insulations and their combustion resistance are discussed. Thermal conductivity and the effects of several parameters on thermal performance are reviewed. The potential and costs of the raw material and quality and ecological aspects are also discussed. Finally, needs for future research is proposed.