Polymer active complex fibers

• US 8,349,449 B2
• Filed: 05/15/2008
• Issued: 01/08/2013
• Est. Priority Date: 05/15/2008
• Status: Active Grant

• Current Assignee: Clorox Company
• Original Assignee: Clorox Company
• Inventors: Privitera, Marc, Lestage, David Jackson, White, Edward Jason
• Primary Examiner(s): GRAY, JILL M
• Application Number:
  US12/120,898
• Publication Number:
  US 20090285718A1
• Time in Patent Office: 1,699 Days
• Field of Search: None
• US Class Current: 428/364
• CPC Class Codes: A61L 9/00 Disinfection, sterilisation or deodorisation of air body deodorants A61Q15/00; purifying air by respirators A62B, A62D9/00; separating dispersed particles from gases or vapours B01D45/00 - B01D51/00, B03C3/00; chemical or biological purification of waste gases B01D53/34; production of ozone C01B13/10; air-conditioning systems incorporating sterilisation F24F3/16, F24F8/20
• CPC Class Codes: B08B 1/00 Cleaning by methods involving the use of tools cleaning hollow articles by methods or apparatus specially adapted thereto B08B9/00
• CPC Class Codes: C11D 17/049 Cleaning or scouring pads; Wipes
• CPC Class Codes: D01D 5/0038 the fibre formed by solvent evaporation, i.e. dry electro-spinning
• CPC Class Codes: D01F 1/10 Other agents for modifying properties
• CPC Class Codes: D01F 6/20 from polymers of cyclic compounds with one carbon-to-carbon double bond in the side chain
• CPC Class Codes: D04H 3/02 characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
• CPC Class Codes: Y10T 428/2904 Staple length fiber
• CPC Class Codes: Y10T 428/2913 Rod, strand, filament or fiber
• CPC Class Codes: Y10T 428/2927 including structurally defined particulate matter
• CPC Class Codes: Y10T 428/2933 Coated or with bond, impregnation or core
• CPC Class Codes: Y10T 428/2967 Synthetic resin or polymer

Abstract

The invention covers a method of forming functionally active fibers and substrates including functionally active fibers. The method includes forming a mixture of at least one poly vinyl polymer and at least one bleaching active. The mixture is then injected at a controlled flow rate into an electric field to cause the mixture to at least partially form fine fibers that have an average diameter of less than about 1000 nanometers.

Claims

1. An electrospun functionally active nanofiber comprising:

a homogenous mixture of one or more polymer and one or more bleaching agent, wherein said polymer and said bleaching agent are at least partially reacted or bonded together, said polymer is at least partially water-soluble, at least partially ethanol-soluble, at least partially glycerol-soluble, or combinations thereof, said bleaching agent is selected from the group consisting of peracids, perborates, percarbonates, sodium hypochlorite, calcium hypochlorite, peroxides, or mixtures thereof, optionally, said mixture includes one or more additives, anti-corrosion materials, anti-redeposition materials, anti-static agents, anti-sticking agents, buffering and pH adjusting agents, chelating agents, defoamers, elastomers, enzymes, filler materials, foamers, fragrances or perfumes, heat generating materials, hydrotropes, sequestration agents, softening agents, soil release agents, solubilizing materials, stabilizers, surfactants, sudsing control agents, thickeners, solvents, wetting agents, and-UV protectors, said mixture having a viscosity of said mixture about 1000-10000 cps at 20°

C., said mixture of one or more polymer, one or more bleaching agent and one or more additives, together forms a homogenous composition that is formed into a homogenous nanofiber that has an average diameter of less than about 1000 nanometers, said polymer designed to dissolve in water at a slower rate than said bleaching agent so as to extend the time of release of said bleaching agent from said polymer and thereby extend cleaning time and efficacy of said electrospun functionally active nanofiber.

2. The electrospun functionally active nanofiber as defined in claim 1, wherein said polymer is a poly vinyl polymer.

3. The electrospun functionally active nanofiber as defined in claim 2, wherein said poly vinyl polymer includes polymers of vinyl derivatives of pyrrolidone.

4. The electrospun functionally active nanofiber as defined in claim 1, wherein said nanofiber is designed to deliver a controlled release of a functional active comprising at least one bleaching agent.

5. The electrospun functionally active nanofiber as defined in claim 1, wherein said average diameter of said fibers is about 25-200 nanometers.

6. The electrospun functionally active nanofiber as defined in claim 1, wherein said polymer and said bleaching agent are homogeneously mixed in a solvent, wherein said solvent comprises one or more of the following components:

water, an alcohol, or mixtures thereof, until said polymer and at least one bleaching agent are completely soluble in said solvent prior to said forming said nanofiber, said formed nanofiber has homogenous composition.

7. An electrospun functionally active nanofiber as defined in claim 1 comprising:

a water-soluble polymer that has been modified to include a bleaching agent that is then dissolved in water to form an electrospray medium that is a stable and homogenous mixture comprising;

said polymer, said bleaching agent, water and one or more additives, and wherein said electrospray medium is electropsun into functionally active nanofibers having a homogenous composition.

8. An electrospun functionally active nanofiber according to claim 7, wherein the water-soluble polymer a poly vinyl polymer.

9. An electrospun functionally active nanofiber according to claim 7, wherein the bleaching agent comprises peroxide.

10. An electrospun functionally active nanofiber according to claim 7, wherein said additive is selected from the group consisting of:

anti-corrosion materials, anti-redeposition materials, anti-static agents, anti-sticking agents, buffering and pH adjusting agents, chelating agents, defoamers, elastomers, enzymes, filler materials, foamers, fragrances or perfumes, heat generating materials, hydrotropes, sequestration agents, softening agents, soil release agents, solubilizing materials, stabilizers, surfactants, sudsing control agents, thickeners, wetting agents, and UV protectors.

11. An electrospun functionally active nanofiber according to claim 7, wherein the nanofiber is substantially free of:

a chemical indicator, a physical indicator or a biological indicator.

12. An electrospun functionally active nanofiber according to claim 7, wherein the nanofiber is substantially free of encapsulated actives.