Abstract
A pilot rig is described which can be used to impregnate jute cloth with polyethylene and to produce plane and corrugated sheets and multi-ply sandwich boards with corrugated cores. Impregnation increases the tensile strength of jute by 44% if one side is treated, and by 54% if both sides are covered. The three-ply sandwich board has an areal density of 1.92 kg m −2 and a crushing, burst and penetration resistance similar to that of paper/wood chip products.
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