This invention concerns extrudates having high surface area materials and at least one metal ion adsorbed onto the high surface area material. The extrudates may be breathable films, multilayer laminates and pultruded articles. The extrudates may be made into storage and packaging material to reduce
This invention concerns extrudates having high surface area materials and at least one metal ion adsorbed onto the high surface area material. The extrudates may be breathable films, multilayer laminates and pultruded articles. The extrudates may be made into storage and packaging material to reduce odor and retard the ripening of fruit. The extrudates, if in the form of a breathable film or multilayer laminate may be used as outer cover material for personal care products like diapers, adult incontinence products, training pants and the like. The high surface area particle-containing extrudate may be made by adding modified nanoparticles to a filler before the filler is treated with a fatty acid. Alternatively, a filler previously treated with a fatty acid may be modified by subjecting the filler to sonic energy in the presence of an aqueous solution of metal ions and nanoparticles.
대표청구항▼
What is claimed is: 1. A breathable film comprising a thermoplastic polymer and a filler blended with silica nanoparticles, wherein said silica nanoparticles have a diameter of about 500 nanometers or less and a negative first Zeta Potential from about −1 to about −50 millivolts as me
What is claimed is: 1. A breathable film comprising a thermoplastic polymer and a filler blended with silica nanoparticles, wherein said silica nanoparticles have a diameter of about 500 nanometers or less and a negative first Zeta Potential from about −1 to about −50 millivolts as measured in an aqueous suspension, said silica nanoparticles being modified with a metal ion to form modified silica nanoparticles, said metal ion selected from the group consisting of copper ion, silver ion, gold ion, iron ion, and combinations thereof, wherein said modified silica nanoparticles comprise a second Zeta Potential being at least about 5.0 millivolts higher than said negative first Zeta Potential. 2. The breathable film of claim 1, wherein the filler comprises at least 35% by weight of said breathable film. 3. The breathable film of claim 1, wherein the filler comprises from about 45% to about 65% by weight of said breathable film. 4. The breathable film of claim 1, wherein the filler has an average particle size of about 0.1 microns to about 10 microns. 5. The breathable film of claim 1, wherein the filler is coated with a fatty acid. 6. The breathable film of claim 1, wherein the filler is selected from the group consisting of calcium carbonate, clays, silica, alumina, barium sulfate, talc, magnesium sulfate, titanium dioxide, zeolites, aluminum sulfate, cellulose powders, diatomaceous earth, gypsum, magnesium sulfate, magnesium carbonate, barium carbonate, kaolin, mica, carbon, magnesium oxide, aluminum hydroxide, pulp powder, wood powder, cellulose derivatives, polymeric particles, chitin, chitin derivatives, and combinations thereof. 7. The breathable film of claim 1, wherein the filler comprises calcium carbonate. 8. The breathable film of claim 1, wherein said negative first Zeta Potential is from about −1 to about −20 millivolts. 9. The breathable film of claim 1, wherein said film has a WVTR of at least 300 g/m2/day. 10. The breathable film of claim 1, wherein said film has a WVTR of at least 500 g/m2/day. 11. The breathable film of claim 1, wherein the surface area of said silica nanoparticles is at least 100 m2/g. 12. The breathable film of claim 1, wherein the surface area of said silica nanoparticles is at least 200 m2/g. 13. The breathable film of claim 1, wherein the surface area of said silica nanoparticles is at least 500 m2/g. 14. The breathable film of claim 1, wherein the thermoplastic polymer is a polyolefin. 15. The breathable film of claim 1, wherein said metal ions are adsorbed onto said silica nanoparticles to form said modified silica nanoparticles. 16. The breathable film of claim 1, wherein said metal ions are bonded to said silica nanoparticles via coordinate bonds, covalent bonds, or mixtures thereof to form said modified nanoparticles. 17. The breathable film of claim 1, wherein said metal ions are coupled to said silica nanoparticles with an organofunctional silane to form said modified silica nanoparticles. 18. A breathable film comprising a thermoplastic polymer and a filler blended with nanoparticles, wherein said nanoparticles have a diameter of about 500 nanometers or less and a positive first Zeta Potential from about 1 to about 70 millivolts, said nanoparticles being modified with a metal ion to form modified nanoparticles, wherein said modified nanoparticles comprise a second Zeta Potential being at least about 5.0 millivolts lower than said positive first Zeta Potential. 19. The breathable film of claim 18, wherein said nanoparticles are alumina nanoparticles. 20. The breathable film of claim 18, wherein said metal ion is selected from the group consisting of permanganate ion, chlorite ion, persulfate ion, and combinations thereof. 21. The breathable film of claim 20, wherein said metal ion is permanganate ion. 22. The breathable film of claim 18, wherein said metal ions are adsorbed onto said nanoparticles to form said modified nanoparticles. 23. The breathable film of claim 18, wherein said metal ions are bonded to said nanoparticles via coordinate bonds, covalent bonds, or mixtures thereof to form said modified nanoparticles. 24. The breathable film of claim 18, wherein said metal ions are coupled to said nanoparticles with an organofunctional silane to form said modified nanoparticles. 25. A personal care product comprising an outer cover, said outer cover comprising a breathable film and having a WVTR about 500 g/m2/day or greater, said breathable film comprising a thermoplastic polymer and a filler blended with nanoparticles, wherein said nanoparticles have a diameter of about 500 nanometers or less and selected from the group consisting of silica, alumina, and combinations thereof, wherein said nanoparticles are modified with a metal ion to form modified nanoparticles. 26. The personal care product of claim 25 further comprising a nonwoven fabric laminated to said breathable film. 27. The personal care product of claim 25, wherein the personal care product is a diaper. 28. The personal care product of claim 25, wherein the personal care product is an adult incontinence product. 29. The breathable film of claim 1, wherein said breathable film is formed by coextruding said thermoplastic polymer with said blend of filler and silica nanoparticles.
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