US Patent 9908680 Tree-free fiber compositions and uses in containerboard packaging

A containerboard packaging material includes at least one linerboard layer including tree-based pulp material and at least one fluted medium layer including tree-free pulp material, wherein the tree-free pulp material is present in the medium layer in an amount of from about 5% to about 100%. The medium layer pulp material can be tree-free pulp material. The tree-free pulp material can be wheat straw pulp and red algae pulp.