card board Pulp for white or brown flat and multi-layer cardboard can be efficiently produced on Clextral twin-screw systems. The defibering of hard or softwood chips and the bleaching of the pulp are all done in a continuous chemical and mechanical process on the same line. Clextral lines offer distinct advantages compared to conventional cardboard processing: lower production costs and a reduction of effluents, pollution and water consumption. Clextral lines are also more compact and energy efficient.

Practical information

Cardboard is a multipurpose product that allows products of all sorts to be packaged and shipped economically and ecologically. Cardboard is lighter than wood (and in most cases plastic) and can be made from both wood pulp chips and recycled material. In turn, it is recyclable and biodegradable. The mechanical properties of cardboard come from its corrugated or crimped center of from its thickness. It can be made in a wide variety of thicknesses to meet various specifications. Since it is robust and shock-resistant, keeping out light and dust, it can be used as bulk packaging for storage or transport, but also final packaging since it can be treated, coated and printed to make commercially attractive boxes.

Clextral twin-screw process features

Clextral twin-screw cardboard manufacturing lines offer major advantages compared to traditional systems:

  • Cost effective and environmentally-friendlymanufacturing
    • 10 to 15% reduction in energy consumption for fiber separation
    • 10 to 30% decrease of chemicals and bleaching agents
    • Reduced water consumption, from 30% up to 90% for certain pulp processes
  • Compact turnkey installation, requiring less floor space and simplifying engineering requirements
  • Quick and Easy maintenance, reduced down time and changeover

Clextral also offers its expertise and inhouse facilities to enable papermakers and research centers to develop and test new cardboards and improve processing.

Learn more about cellulose pulp processing lines


Did you know?

Today, over 80% of cardboard boxes and byproducts are recycled, making it one of the most environmentally friendly industrial products in the world.