Moisture management of paperboard structures
AssigneeSonoco Development, Inc.
InventorsIsmael A. Hernández Rosario, Ty Harvey
Life of this patent
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Abstract
A moisture control mechanism that allows a desired amount of moisture to evaporate out of a multiple ply paperboard structure is provided. The moisture control mechanism comprises an adhesive that adheres the multiple plies together, the adhesive comprising dextrin and an acrylic polymer. Alternately or additionally, a strength preservation mechanism that allows a strength to be maintained even when a multiple ply paperboard structure is highly wet. The strength preservation mechanism comprises an adhesive that adheres multiple plies together, the adhesive comprising dextrin and an acrylic polymer.
Claims19
A core for winding sheet or strand materials, the core having a moisture level, the core comprising:
- a hollow cylindrical body comprising multiple plies;
- and
- a moisture control mechanism that allows moisture to leave the core, then, when the moisture level reaches a predetermined value, activates a moisture barrier to limit or prevent moisture from entering the core, thereby maintaining the moisture content of the core at or below the predetermined value.
A method of making a multiple ply structure comprising multiple sheets of paperboard, the method comprising the steps of:
- providing an adhesive composition comprising dextrin and an acrylic polymer;
- and
- applying the adhesive composition as an adhesive agent or a laminating agent to one of two surfaces of at least one of the sheets, wherein the adhesive composition bonds the two surfaces together to form the multiple ply structure.
An adhesive composition for use in making a paperboard structure comprising multiple plies, the adhesive composition comprising:
- 40-80 wt % dextrin;
- and
- 20-60 wt % acrylic polymer, wherein the adhesive composition allows moisture to leave the paperboard structure, then, when the moisture level reaches a predetermined value, activates a moisture barrier to limit or prevent moisture from entering the paperboard structure, thereby maintaining the moisture content of the paperboard structure at or below the predetermined value.
Dependencies are inferred from the claim text.