PRESSURE-SENSITIVE ADHESIVE MICROCAPSULE AND LABEL SHEET

摘要

PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive microcapsule comprising a polyurea-polyurethane resin obtained by polymerizing a polyfunctional isocyanate compound, hardly affecting the environment, and having the adhesiveness hardly being damaged, and to provide a label sheet using the microcapsule.

SOLUTION: The pressure-sensitive adhesive microcapsule is made by using a water-dispersible isocyanate compound as the polyfunctional isocyanate compound. The pressure-sensitive adhesive microcapsule includes a solvent-type adhesive in a polyurea-polyurethane resin wall film containing the polymer of the water-dispersible polyfunctional isocyanate compound. The pressure-sensitive adhesive microcapsule can be obtained by mixing the water-dispersible isocyanate compound with a dispersion obtained by dispersing the solvent-type adhesive to polymerize the water-dispersible isocyanate compound and to form the polyurea-polyurethane resin wall film.

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