Fabric impregnated with functional substances for controlled release
AssigneeAdvanced Polymer Systems, Inc.
InventorsHelen C. Leong, Martin Katz, Chung-Heng Cheng
Life of this patent
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Abstract
Intersticed materials, including woven and nonwoven fabrics, open-cellular materials and the like, are impregnated with functional substances by incorporating the substances in microscopic porous particles in which the pores form an interconnected network open to the particles in the interstices of the materials. The functional substances thus impart useful properties to the material in a controlled release manner.
Claims32
A composition of matter comprising a material provided with interstices having a solid particles residing therein, said material being a member selected from the group consisting of joined fibers, woven fabric, non-woven fabric, paper, woven cloth, non-woven cloth, foamed plastic and sponge, said solid particles being from about one to about 100 microns in diameter and containing a substantially continuous network of pores open to the exterior of said particles, with a functional substance retained in said pores.
A method for impregnating an intersticed material with a functional substance, said material being a member selected from the group consisting of joined fibers, woven fabric, non-woven fabric, paper, woven cloth, non-woven cloth, foamed plastic and sponge, said method comprising placing soldi particles in the interstices of said material, said solid particles being from about one to about 100 microns in diameter and containing a substantially continuous network of pores open to the exterior of said particles, said pores containing said functional substance.
Dependencies are inferred from the claim text.