A delivery system for various functional compounds is disclosed. The delivery system incorporates a composition containing alumina. Various functional materials containing particular moieties may be adsorbed onto the alumina and used as desired. The functional compounds can be, for instance, pharmac
A delivery system for various functional compounds is disclosed. The delivery system incorporates a composition containing alumina. Various functional materials containing particular moieties may be adsorbed onto the alumina and used as desired. The functional compounds can be, for instance, pharmaceuticals, xenobiotics, anti-microbial agents, anti-viral agents, UV absorbers, odor control agents, fragrances, and the like. In one particular embodiment, for instance, certain dyes can be adsorbed onto the alumina surfaces. Once the dye is adsorbed onto the alumina surface, the resulting particles can be combined with a liquid vehicle for use in any suitable printing process.
대표청구항▼
What is claimed: 1. An article of manufacture comprising: a nonwoven material having a receiving surface containing negative charges, wherein the nonwoven material comprises polyolefin fibers; and a plurality of positively charged particles bonded to the receiving surface of the nonwoven material t
What is claimed: 1. An article of manufacture comprising: a nonwoven material having a receiving surface containing negative charges, wherein the nonwoven material comprises polyolefin fibers; and a plurality of positively charged particles bonded to the receiving surface of the nonwoven material through coulombic attraction, the particles containing silica coated with alumina, at least a portion of the alumina being present on a surface of the particles, and wherein a functional compound is bonded to the alumina on the surface of the particle, the functional compound prior to bonding with the alumina containing a moiety comprising: or a tautomer thereof, or a functional equivalent thereof and wherein R and R′ comprise independently hydrogen, an alkyl group, or an aryl group. 2. An article as defined in claim 1, wherein the functional compound comprises a colorant, a UV absorber, a pharmaceutical, an odor control agent, a fragrance, a therapeutic agent, a nutriceutical agent, an anti-bacterial agent, an anti-microbial agent, an anti-viral agent, a xenobiotic, or combinations thereof. 3. An article as defined in claim 1, wherein the particle containing alumina bonded to the functional compound has an average dimension of less than 1 mm. 4. An article as defined in claim 1, wherein the particle containing alumina bonded to the functional compound has an average dimension of less than 1,000 nm. 5. An article as defined in claim 1, wherein the functional compound comprises hydrocortisone, ascorbic acid, or aspartame. 6. An article as defined in claim 1, wherein the functional compound comprises tetracycline. 7. An article as defined in claim 1, wherein the particle containing alumina bonded to the functional compound has a zeta potential of at least 20 mV. 8. An article as defined in claim 1, wherein the plurality of particles are contained within a liquid vehicle when applied to the nonwoven material. 9. An article as defined in claim 1, wherein the functional compound comprises a dye. 10. An article as defined in claim 1, wherein the nonwoven material is subjected to a corona treatment prior to bonding with the plurality of positively charges particles. 11. An article as defined in claim 1, wherein the nonwoven material is subjected to an electret treatment prior to bonding with the plurality of positively charges particles. 12. An article as defined in claim 1, wherein the article has been exposed to microwave radiation or radio frequency radiation after the nonwoven material and the plurality of charged particles have been bonded together. 13. An article as defined in claim 9, wherein the dye contains an anthraquinone chromophore. 14. An article as defined in claim 9, wherein the dye contains salicylate or 3-hydroxy-2-naphthoic acid moieties. 15. An article as defined in claim 9, wherein the dye is based on chromotropic acid. 16. An article as defined in claim 9, wherein the dye contains an acetoacetanilide. 17. An article as defined in claim 9, wherein the dye contains a naphthoquinone. 18. An article as defined in claim 9, wherein the dye contains the moiety: or a tautomer of this moiety. 19. An article as defined in claim 9, wherein the dye contains the moiety: and wherein R and R′ are hydrogen. 20. An article as defined in claim 9, wherein the dye contains the moiety: or a tautomer of this moiety. 21. An article as defined in claim 9, wherein the plurality of particles have an average dimension of less than 1,000 nm. 22. An article as defined in claim 1, wherein the receiving surface of the nonwoven material and the particles have a surface charge difference of at least 42 mV. 23. An article as defined in claim 1, wherein the receiving surface of the nonwoven material and the particles have a surface charge difference of at least 42 mV. 24. An article of manufacture comprising: a nonwoven spunbond fabric having a receiving surface containing negative charges, wherein the spunbond fabric comprises polyolefin fibers; and a plurality of positively charged particles bonded to the receiving surface of the spunbond web through coulombic attraction, the particles containing silica coated with alumina, at least a portion of the alumina being present on a surface of the particles, and wherein a functional compound is bonded to the alumina on the surface of the particle, the functional compound prior to bonding with the alumina containing a moiety comprising: or a tautomer thereof, or a functional equivalent thereof and wherein R and R′ comprise independently hydrogen, an alkyl group, or an aryl group. 25. An article as defined in claim 24, wherein the particle comprises a core material coated with alumina. 26. An article as defined in claim 25, wherein the core material comprises silica. 27. An article as defined in claim 24, wherein the functional compound comprises a colorant, a UV absorber, a pharmaceutical, an odor control agent, a fragrance, a therapeutic agent, a nutriceutical agent, an anti-bacterial agent, an anti-microbial agent, an anti-viral agent, a xenobiotic, or combinations thereof. 28. An article as defined in claim 24, wherein the particle containing alumina bonded to the functional compound has an average dimension of less than 1 mm. 29. An article as defined in claim 24, wherein the particle containing alumina bonded to the functional compound has an average dimension of less than 1,000 nm. 30. An article as defined in claim 24, wherein the functional compound comprises hydrocortisone, ascorbic acid, or aspartame. 31. An article as defined in claim 24, wherein the functional compound comprises tetracycline. 32. An article as defined in claim 24, wherein the particle containing alumina bonded to the functional compound has a zeta potential of at least 20 mV. 33. An article as defined in claim 24, wherein the plurality of particles are contained within a liquid vehicle when applied to the spunbond fabric. 34. An article as defined in claim 24, wherein the functional compound comprises a dye. 35. An article as defined in claim 34, wherein the dye contains an anthraquinone chromophore. 36. An article as defined in claim 34, wherein the dye contains salicylate or 3-hydroxy-2-naphthoic acid moieties. 37. An article as defined in claim 34, wherein the dye is based on chromotropic acid. 38. An article as defined in claim 34, wherein the dye contains an acetoacetanilide. 39. An article as defined in claim 34, wherein the dye contains a naphthoquinone. 40. An article as defined in claim 34, wherein the dye contains the moiety: or a tautomer of this moiety. 41. An article as defined in claim 34, wherein the dye contains the moiety: and wherein R and R′ are hydrogen. 42. An article as defined in claim 34, wherein the dye contains the moiety: or a tautomer of this moiety. 43. An article as defined in claim 24, wherein the plurality of particles have an average dimension of less than 1,000 nm. 44. An article as defined in claim 24, wherein the receiving surface of the spunbond fabric and the particles have a surface charge difference of at least 42 mV. 45. An article as defined in claim 24, wherein the receiving surface of the spunbond fabric and the particles have a surface charge difference of at least 42 mV.
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