Stramit Machine Technology

Every year, approximately 2 billion tonnes of cereal straw is produced as a by product of growing barley, oats, rice, rye and wheat across the globe.

Half of this straw is ploughed back into the ground to maintain the nutrient cycle. About a third of the remaining straw is used as fuel, livestock bedding and fodder, thatching and basket-making. Each year over 700 million tonnes remains unused.

Stramit Machine Technology takes this readily available by-product and turns it into a unique, high value engineered building product called Compressed Straw Board (CSB).

How does it work?

In a continuous extrusion process, the Stramit Machine strand orientates the straw and applies heat and pressure.

The heat causes moisture in the straw to be turned to steam. The steam softens the naturally present lignin in cell walls of the straw. Lignin is a long chain molecule that acts as a bonding agent. The pressure compresses the straw into a self bonded whole. Recycled cardboard is bonded to the top and bottom of the straw extrusion and the board is finally cut to length.

The Compressed Straw Board can be manufactured in 38 and 58 mm thicknesses in 800 and 1200 mm widths.

Lignin in the cell wall of straw