Polysaccharide adhesives for multi-ply paper products
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsJames L. Eden, Eric M. Weisser, Daniel B. Solarek
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Abstract
An aqueous, light weight paper laminating adhesive comprising a continuous aqueous phase of from about 15 to 50% by weight of polysaccharide material dispersed in water, the continuous phase polysaccharide material having a zero-shear viscosity of greater than 0.07 Pa·s when measured at 26% (+/−1% solids) and a shear rate of 0.1s−1; a shear-thinning index of 0.90 to 1.1; and bleed time of greater than 15 seconds. Also disclosed is another adhesive composition, which is particularly useful in non-contact spay applications and comprises the continuous phase polysaccharide phase described above as well as a second component comprising a water swellable, insoluble polysaccharide particulate phase.
Claims10
A light weight, paper laminating, aqueous, high-solids, polysaccharide adhesive composition comprising from about 15 to 50% by weight of starch or dextrin or blends of starch and dextrin as a continuous aqueous phase, these dispersed starches and dextrins having:
- a) a zero-shear viscosity of 0.07 Pa·s at about 26% (+/−1%) solids, 120° F. (49° C.) and a shear rate of 0.1s−1,
- b) a shear thinning index of about 0.9 to 1.1, and the adhesive composition having a bleed time of greater than 15 seconds, both at 26% solids (+/−1%) and 49° C.
An aqueous, high solid, polysaccharide adhesive composition suitable for use in contact applications and composition from about 15 to 50% by weight, based on the total weight of the composition, of starch or dextrin or blend thereof dispersed in water, the dispersed starch and dextrin having:
- a) A zero-shear viscosity of between greater than 0.2 Pa·s and less than about 20 Pa·s at about 26% (+/−1%) solids, 120° F. (49° C.) and a shear rate of 0.1s−1, and
- b) The adhesive composition having a bleed time of greater than 7 seconds.
Dependencies are inferred from the claim text.