The structure of polypropylene capillary boards resembles cardboard. Capillary polypropylene is manufactured by extrusion. It is an advanced, lightweight, extremely flexible and odourless building material. Unlike cardboard, capillary polypropylene is moisture resistant, highly durable and has a high mechanical strength. Its colour pallet is rich and is excellent for series printing. It is used in industry, agriculture, forestry, design engineering, advertising and construction. It is particularly popular in the manufacture of reusable packaging and material protection systems.