High-concentration starch adhesive
AssigneeHonshu Paper Co., Ltd.
InventorsShigeki Nagai, Haruo Sato, Nagahisa Karube
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Abstract
The present invention relates to a high-concentration starch adhesive prepared by treating a starch slurry at a temperature of 100.degree. C. or above to form a gelatinized solution and suspending an ungelatinized starch in the gelatinized solution. According to the present invention, the viscosity of the starch adhesive can be kept stable over a long period of time; the problems such as warp due to the expansion and contraction, by the absorption of water, of the material to be adhered, can be solved; and the quantity of heat necessitated in the adhesion step can be much reduced.
Claims6
A high-concentration starch adhesive prepared by treating a starch slurry at a temperature of 100.degree. C. or higher to form a gelatinized solution having a starch concentration of 30-60% by weight, and then suspending an ungelatinized starch in said gelatinized solution, said high-concentration starch slurry containing a fatty acid monoester or diester of a polyethylene glycol having the following formula:
- ##STR3## wherein n represents a numeral of 10-200, and R and R' each represents a saturated or unsaturated aliphatic group having 7-31 carbon atoms.
A high-concentration starch adhesive prepared by treating a starch slurry at a temperature of 100.degree. C. or higher to form a gelatinized solution having a starch concentration of 30-60% by weight, said high-concentration starch slurry containing a fatty acid monester or diester of a polyethylene glycol having the following formula:
- ##STR4## wherein n represents a numeral of 10-200, and R and R' each represents a saturated or unsaturated aliphatic group having 7-31 carbon atoms.
Dependencies are inferred from the claim text.