초록

Microencapsulated materials are released by removing individual elements from a pad of sheets bonded by adhesive layers containing capsules.

대표청구항 ▼

A stacked, coherent array of elements for providing access to an encapsulated liquid or spreadable material, said array comprising (1) at least three sheets, each pair of adjacent sheets in adjacent elements bound by an adhesive composition layer, (2) said adhesive composition layer containing micro

A stacked, coherent array of elements for providing access to an encapsulated liquid or spreadable material, said array comprising (1) at least three sheets, each pair of adjacent sheets in adjacent elements bound by an adhesive composition layer, (2) said adhesive composition layer containing microcapsules with an encapsulated material comprising a liquid or spreadable material within the shell of the microcapsules, and (3) said microcapsules having an average diameter between 4 and 100 micrometers, the cohesive strength of the adhesive composition layer being less than the strength of the bond between said adhesive composition and the faces of said sheets, the tensile rupture strength of said microcapsules being such that the cohesive failure of the adhesive results in breakage of the microcapsules, and the tensile rupture strength between said two sheets being at least 1.0 g/cm and less than 90 g/cm at 20°C. and 50% relative humidity.