Powdered pouch and method of making same

Patent metadata

Field	Value
Publication number	US-10696460-B2
Application number	US-201715858644-A
Country	US
Kind code	B2
Filing date	Dec 29, 2017
Priority date	Apr 16, 2012
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

Disclosed herein are water-soluble films and resulting packets including a water-soluble film coated by a powder, wherein the powder includes a mixture of a powdered lubricant and an active agent. Optionally, the active agent may be encapsulated, e.g. microencapsulated, for release of the active agent through mechanisms including, but not limited to, mechanical rupture, melt, ablation, dissolution, diffusion, biodegradation, or pH-controlled release. Active ingredients described include enzymes, oils, flavors, colorants, odor absorbers, fragrances, pesticides, fertilizers, activators, acid catalysts, metal catalysts, ion scavengers, bleaches, bleach components, fabric softeners and combinations thereof. Examples of packet fills include laundry detergents, bleach and laundry additives, fabric care, dishwashing, hard surface cleaning, beauty care, skin care, other personal care, and foodstuffs.

First claim

What is claimed:

1. A water-soluble packet, comprising:
a water-soluble film in the form of a packet; and
a powder coating on the film in the form of a packet, the coating consisting of a powder comprising
a powdered lubricant and
an active agent, provided that when the active agent is a fragrance the fragrance is microencapsulated in a wax, stearic acid, stearyl alcohol, glyceryl stearates, or polymeric microcapsule,
wherein the powdered lubricant is not the same as the microcapsule and the active agent is selected from the group consisting of enzymes, oils, flavors, colorants, odor absorbers, fragrances, pesticides, fertilizers, activators, acid catalysts, metal catalysts, ion scavengers, bleaches, bleach components, fabric softeners or combinations thereof.

2. The water-soluble packet of claim 1 , wherein the active agent is microencapsulated in a wax, stearic acid, stearyl alcohol, glyceryl stearates, or polymeric microcapsule.

3. The water-soluble packet according to claim 1 , wherein the powdered lubricant is selected from the group consisting of starches, modified starches, silicas, siloxanes, calcium carbonate, magnesium carbonate, clay, talc, silicic acid, gypsum, zeolites, cylclodextrins, calcium stearate, zinc stearate, alumina, magnesium stearate, alumina, zinc oxide and combinations thereof.

4. The water-soluble packet according to claim 3 , wherein the powdered lubricant is kaolin.

5. The water-soluble packet of claim 2 , wherein the microcapsule is characterized by one or more of the following release mechanisms: mechanical rupture, dissolution, diffusion, ablation, biodegradation, melt, or a pH triggered release mechanism.

6. The water-soluble packet of claim 1 , wherein the powdered lubricant is characterized by a mean particle size in a range of about 1 μm to about 100 μm.

7. The water-soluble packet according to claim 2 , wherein said microcapsule is selected from one or more of: melamine formaldehyde, polyurethane, urea formaldehyde, chitosan, poly methyl methacrylate, polystyrene, polysulfone, poly tetrahydrofuran, gelatin, gum arabic, starch, polyvinylpyrrolidone, carboxymethylcellulose, hydroxyethylcellulose, methylcellulose, arabinogalactan, polyvinyl alcohol, polyacrylic acid, ethylcellulose, polyethylene, polymethacrylate, polyamide, poly (ethylenevinyl acetate), cellulose nitrate, silicones, poly(lactideco-glycolide), paraffin, carnauba, spermaceti, beeswax, stearic acid, stearyl alcohol, glyceryl stearates, shellac, cellulose acetate phthalate, and zein.

8. The water-soluble packet according to claim 2 , wherein the microcapsule is characterized by a mean particle size in a range of about 0.1 μm to about 200 μm.

9. The water-soluble packet according to claim 2 , wherein the mean particle size of the microcapsule is greater than the mean particle size of the powdered lubricant, wherein the microcapsule is selected from one or more of the group consisting of melamine formaldehyde, polyurethane, urea formaldehyde, chitosan, polymethyl methacrylate, polystyrene, polysulfone, poly tetrahydrofuran, gelatin, gum arabic, starch, polyvinyl pyrrolidone, carboxymethylcellulose, hydroxyethylcellulose, methylcellulose, arabinogalactan, polyvinyl alcohol, polyacrylic acid, ethylcellulose, polyethylene, polymethacrylate, polyamide, poly (ethylenevinyl acetate), cellulose nitrate, silicones, poly(lactideco-glycolide), paraffin, carnauba, spermaceti, beeswax, stearic acid, stearyl alcohol, glyceryl stearates, shellac, cellulose acetate phthalate, and zein.

10. The water-soluble packet according to claim 2 , wherein the microencapsulated active agent comprises microcapsule agglomerates and the mean microcapsule agglomerate size is greater than the mean particle size of the powdered lubricant, wherein the microcapsule is selected from one or more of the group consisting of melamine formaldehyde, polyurethane, urea formaldehyde, chitosan, polymethyl methacrylate, polystyrene, polysulfone, polytetrahydrofuran, gelatin, gum arabic, starch, polyvinyl pyrrolidone, carboxymethylcellulose, hydroxyethylcellulose, methylcellulose, arabinogalactan, polyvinyl alcohol, polyacrylic acid, ethylcellulose, polyethylene, polymethacrylate, polyamide, poly(ethylenevinyl acetate), cellulose nitrate, silicones, poly(lactidoco-glycolide), paraffin, carnauba, spermaceti, beeswax, stearic acid, stearyl alcohol, glyceryl stearates, shellac, cellulose acetate phthalate, and zein.

11. The water-soluble packet according to claim 1 , wherein the powder coating comprises about 1 wt % to about 99 wt % active agent.

12. The water-soluble packet according to claim 1 , wherein the powder coating comprises about 1 wt % to about 99 wt % powdered lubricant.

13. The water-soluble packet according to claim 1 , wherein the powder coating is present on the film in the form of a packet in an amount in a range of about 0.01 mg/cm2 to about 10 mg/cm2.

14. The water-soluble packet according to claim 1 , wherein the water-soluble film comprises a material selected from the group consisting polyvinyl alcohol, modified polyvinyl alcohols, polyacrylates, water-soluble acrylate copolymers, methylcellulose, carboxymethylcellulose, dextrin, ethylcellulose, hydroxyethylcelleulose, hydroxypropyl methylcellulose, malodextrin, polymethacrylates, polyvinyl alcohol copolymers, hydroxypropyl methyl cellulose, polyvinyl pyrrolidone, polyalkylene oxides, acrylamide, acrylic acid, and combinations thereof.

15. The water-soluble packet according to claim 1 , further comprising a solid, liquid, or gel composition enclosed within the water-soluble packet.

16. The water-soluble packet according to claim 15 , wherein the enclosed composition comprises a laundry detergent, a bleach, a fabric care composition, a dishwashing composition, a hard surface cleaning composition, a beauty care composition, a skin care composition, a personal care composition, or a food product composition, or any combination thereof.

17. The water-soluble packet according to claim 15 , wherein the active agent is capable of a chemical reaction with a component of the composition enclosed in the water-soluble film.

18. The water-soluble packet according to claim 17 , wherein the active agent is capable of a chemical reaction with a component of the composition enclosed in the water-soluble film in an aqueous solution.

19. The water-soluble packet according to claim 15 , wherein either the active agent is unstable in the presence of a component of the composition enclosed within the water-soluble film, or a component of the composition enclosed within the water-soluble film is unstable in the presence of the active agent, or both the active agent and a component of the composition enclosed within the water-soluble film are unstable in the presence of each other.

20. The water-soluble packet according to claim 18 , wherein
the composition enclosed in the water-soluble film comprises a percarbonate; and
the active agent comprises tetraacytylethylenediamine (TAED).

21. A method of providing a water-soluble packet with additional functionality, comprising:
providing a powder coating on a water-soluble film in the form of a water-soluble packet, the powder coating consisting of powder comprising
a powdered lubricant and
an active agent, provided that when the active agent is a fragrance the fragrance is microencapsulated in a wax, stearic acid, stearyl alcohol, glyceryl stearates, or polymeric microcapsule.

22. A water-soluble film comprising a powder coating on the film

Assignees

• Monosol Llc

Inventors

• Lee David M
• Parulekar Yashodhan S

Classifications

• C08J7/065

  Low-molecular-weight organic substances, e.g. absorption of additives in the surface of the article · CPC title

• C08J7/0427

  with only one layer of a composition containing a polymer binder (with more layers C08J7/042) · CPC title

• C08J7/06

  with compositions not containing macromolecular substances · CPC title

• Y02W90/10

  Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics · CPC title

• B32B27/308

  comprising acrylic (co)polymers · CPC title