Corrugating adhesive containing soluble high amylose starch
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsJames Eden, James Kasica, Craig Leake, Norman Lacourse, Paul Altieri
Life of this patent
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Abstract
Corrugating adhesive compositions comprising soluble high amylose starch as the carrier starch may be prepared as a one-piece, dry mixture that can be dispersed in water at 25.degree. to 55.degree. C. and applied to paperboard without further preparation steps. The corrugating adhesives may be prepared without alkali, and used at any pH.
Claims18
A dry mixture for use as a corrugating adhesive, comprising an effective amount of a raw starch and an effective amount of a soluble high amylose starch, having at least 40% amylose, wherein the soluble high amylose starch is (a) a spray-dried, non-granular starch, characterized in that the starch is substantially non-crystalline, substantially non-retrograded, and fully pre-dispersed;
- (b) a spray-dried, uniformly gelatinized starch in the form of granular indented spheres, with at least a majority of the granules being whole and unbroken, these starch granules being in the form of loosely-bound agglomerates or individual granules;
- or (c) an extruder, non-granular starch, characterized in that the starch is fully pre-dispersed;
- or (d) a mixture thereof.
A corrugating adhesive composition, comprising an effective amount of a raw starch, an effective amount of water, and an effective amount of a soluble high amylose starch, having at least 40% by weight of amylose, wherein the soluble high amylose starch is (a) a spray-dried, non-granular starch, characterized in that the starch is substantially non-crystalline, substantially non-retrograded, and fully pre-dispersed;
- (b) a spray-dried, uniformly gelatinizied starch in the form of granular indented spheres, with at least a majority of the granules being whole and unbroken, these starch granules being in the form of loosely-bound agglomerates or individual granules;
- or (c) an extruded, non-granular starch, characterized in that the starch is fully pre-dispersed;
- or (d) a mixture thereof, and wherein the soluble high amylose starch is substantially water soluble at 25.degree. to 55.degree. C. in the absence of alkali.
Dependencies are inferred from the claim text.