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US 2003/0201052 A1Published application
Method of stabilizing composite media and media produced thereby
AssigneeKoslow Technologies Corporation
InventorEvan E. Koslow
Life of this patent
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Abstract
There is provided composite media and a method of producing them. The composite media contain a coalesced composite mixture of particles of an active ingredient, binder particles, and stabilizing particles. The stabilizing particles fuse the composite structure to both front and back substrates while the binder particles fuse the particles of active ingredient to each other and to one of the front and back substrates.
Claims13
A method of immobilizing particles of an active ingredient and a binder between a backing sheet and a covering sheet, comprising the steps of:
- applying a mixture comprising of particles of at least one active ingredient, stabilizing particles, and binder particles to the backing sheet to form a layer of the mixture on the backing sheet, wherein the stabilizing particles are larger than the binder particles and greater than about 100 microns in size;
- placing upon the mixture, the covering sheet;
- heating the mixture to at least a softening temperature of the binder particles and the stabilizing particles, but below a melting temperature of the backing sheet and the particles of at least one active ingredient, so as to cause the binder particles and the stabilizing particles to soften;
- and
- thereafter applying pressure to the backing sheet, the mixture, and the covering sheet wherein the particles of at least one active ingredient are coalesced by the binder particles, and wherein each of the stabilizing particles forms a bond with both the backing sheet and the covering sheet.
2 more elements
Dependencies are inferred from the claim text.