Corrugating adhesive, method for preparing corrugating adhesive, and corrugated board
AssigneeGrain Processing Corporation
InventorsRoger E. McPherson, Arthur G. Schmidt
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Abstract
Disclosed is a method for the preparation of a corrugating adhesive. The method includes the steps of extracting hemicellulose from a hemicellulose-containing plant source, separating the hemicellulose in a soluble phase from the insoluble portion of the hemicellulose-containing plant source, and mixing the hemicellulose-rich phase with starch to form an adhesive composition. The adhesive composition of the invention exhibits superior shear stability properties as compared with prior art adhesive compositions that incorporate pasted starches, and exhibits superior green tack as compared with prior art hemicellulose-based adhesives. Also disclosed are a corrugated board and a method for preparing same.
Claims11
A method for preparing an adhesive composition, the method comprising the steps of:
- hydrolyzing a hemicellulose-containing plant source by heating an alkaline aqueous suspension of said plant source to thereby form a hemicellulose-containing soluble phase and an insoluble phase;
- substantially separating said hemicellulose-containing soluble phase from said insoluble phase;
- optionally separating water from said soluble phase;
- adding starch to said soluble phase in the presence of a liquid carrier under alkaline pH conditions to thereby Form an adhesive composition;
- and
- adding a borate cross-linking agent.
A method for preparing an adhesive composition, the method comprising the steps of:
- extracting hemicellulose from a hemicellulose-containing plant source by heating said plant source in an aqueous carrier at a temperature of at least about 200.degree. F. under alkaline conditions to form a hemicellulose solution;
- separating insoluble components from said hemicellulose solution to form a hemicellulose-rich phase;
- mixing said hemicellulose-rich phase with starch to form an adhesive composition and
- adding a borate cross-linking agent.
An adhesive composition comprising water;
- caustic;
- starch;
- borate cross-linking agent;
- and the extracted soluble phase of a hemicellulose-containing plant source.
Dependencies are inferred from the claim text.