Tree-free fiber compositions and uses in containerboard packaging

Patent metadata

Field	Value
Publication number	US-9908680-B2
Application number	US-201314039576-A
Country	US
Kind code	B2
Filing date	Sep 27, 2013
Priority date	Sep 28, 2012
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

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.

First claim

What is claimed is:

1. A containerboard packaging material comprising:
at least one paper linerboard layer including 50%-95% by weight 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 80% to about 100%, the tree-free pulp material including
a first tree-free pulp material selected from the group consisting of corn stover, straw, other land-based natural fibers, and combinations thereof and present in an amount of from about 10% to about 60%, and
a second tree-free pulp material selected from seaweed and present in an amount of from about 5% to about 30%.

2. The containerboard packaging material of claim 1 , wherein the tree-free pulp material is present in the medium layer in an amount of from about 95% to about 100%.

3. The containerboard packaging material of claim 1 , wherein the seaweed is red algae selected from Gelidium elegance, Gelidium corneum, Gelidium amansii, Gelidium robustum, Gelidium chilense, Gelidium asperum, Gracelaria verrucosa, Eucheuma Cottonii, Eucheuma Spinosum , beludulu, and combinations thereof.

4. The containerboard packaging material of claim 1 , wherein the straw is selected from the group consisting of wheat, rice, oat, barley, rye, flax and grass, and combinations thereof.

5. The containerboard packaging material of claim 1 , wherein the other land-based natural fibers are selected from flax, bamboo, cotton, jute, hemp, sisal, bagasse, kenaf, hesperaloe, switchgrass, miscanthus, and combinations thereof.

6. The containerboard packaging material of claim 1 , comprising from about 20% to about 100% of wheat straw and red algae pulp combined.

7. The containerboard packaging material of claim 1 , comprising from about 5% to about 30% seaweed red algae pulp and from about 70% to about 95% other tree-free fibers.

8. The containerboard packaging material of claim 1 , wherein the fluted medium layer has a basis weight from about 90 g/m 2 to about 200 g/m 2 .

9. The containerboard packaging material of claim 1 , further comprising an adhesive selected from starch, polyvinyl acetate, and combinations thereof.

10. The containerboard packaging material of claim 1 , wherein the fluted medium layer includes flutes ranging in size from about 98 flutes per meter to about 492 flutes per meter.

11. The containerboard packaging material of claim 1 , wherein the tree-free pulp material is wheat straw pulp and red algae pulp.

Assignees

• Kimberly Clark Co

Inventors

• Shi Bo
• Mleziva Mark M
• Thompson Brent M
• Zelenak Robert J

Classifications

• B32B3/28

  characterised by a layer comprising a deformed thin sheet {, i.e. the layer having its entire thickness deformed out of the plane}, e.g. corrugated, crumpled (B32B29/08 takes precedence) · CPC title

• B32B2262/065

  Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo · CPC title

• B32B2250/26

  All layers being made of paper or paperboard · CPC title

• B65D65/403 Primary

  with at least one corrugated layer · CPC title

• Y10T428/24694

  Parallel corrugations · CPC title