Corrugating adhesives employing tapioca fiber
AssigneeCPC International Inc.
InventorsJ. E. Todd Giesfeldt, Jack R. Wallace
Life of this patent
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Abstract
Carrier-type corrugating adhesives are prepared using a carrier phase comprising a combination of tapioca fiber and corn fiber or tapioca fiber and spent germ flake as a substitute for modified or unmodified corn starch to provide an adhesive composition.
Claims10
A corrugated board comprising a corrugated medium bonded to a flat sheet of paper using a starch-based corrugating adhesive composition comprising a carrier phase and a suspended phase, the improvement comprising replacing from about 30 wt. % to about 100 wt. % of a carrier starch in the carrier phase with a carrier starch replacement composition comprising
- from about 100 wt. % to about 25 wt. % tapioca fiber;
- from about 0 wt. % to about 75 wt. % corn fiber;
- and
- from about 0 wt. % to about 5 wt. % polyvinyl alcohol and/or polyvinyl acetate.
A method of making corrugated board comprising bonding a corrugated medium to a flat sheet of paper using a starch-based corrugating adhesive composition comprising a carrier phase and a suspended phase, the improvement comprising replacing from about 30 wt. % to about 100 wt. % of a carrier starch in the carrier phase with a carrier starch replacement composition comprising
- from about 100 wt. % to about 25 wt. % tapioca fiber;
- from about 0 wt. % to about 75 wt. % corn fiber;
- and
- from about 0 wt. % to about 5 wt. % polyvinyl alcohol and/or polyvinyl acetate.
A method of making a starch-based corrugating adhesive composition comprising a carrier phase and a suspended phase, the suspended phase comprising starch, a boron containing compound and water and the carrier phase comprising from about 0 wt. % to about 70 wt. % of a carrier starch and from about 100 wt. % to about 30 wt. % of a carrier starch replacement composition, the carrier starch replacement composition comprising from about 100 wt. % to about 25 wt. % tapioca fiber, from about 0 wt. % to about 75 wt. % corn fiber and from about 0 wt. % to about 5 wt. % polyvinyl alcohol and/or polyvinyl acetate, comprising
- a) mixing together water, tapioca fiber, corn fiber, carrier starch and polyvinyl alcohol and/or polyvinyl acetate, and heating to form an aqueous mixture;
- b) admixing caustic with the mixture from step (a);
- c) adding water to the mixture from step (b), the water having a lower temperature than the mixture, and mixing to cool the mixture;
- d) separately mixing together water, a boron containing compound and starch and heating to form another aqueous mixture;
- and
- e) combining the mixture from (c) with the mixture from (d) to form the corrugating adhesive composition.
Dependencies are inferred from the claim text.