Films including a water-soluble layer and a vapor-deposited organic coating

Patent metadata

Field	Value
Publication number	US-11738367-B2
Application number	US-202117517713-A
Country	US
Kind code	B2
Filing date	Nov 3, 2021
Priority date	Jun 22, 2017
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

Films including a water-soluble layer and a vapor-deposited organic coating are disclosed. The films can optionally further include a vapor-deposited inorganic layer. The films exhibit enhanced barrier properties.

First claim

What is claimed is:

1. A method of forming a soluble unit dose article comprising:
forming a film by providing a first layer of water-soluble polymeric material and vapor depositing an organic coating to at least one surface of the first layer of water-soluble polymeric material to form a second layer, wherein the organic coating comprises a poly(p-xylylene) polymer;
vapor depositing a third layer comprising an inorganic coating to at least one surface of the first layer of water-soluble polymeric material; wherein the inorganic coating comprises a plurality of microfractures;
forming an open pouch from the film;
filling the open pouch with a composition; and
closing the open pouch.

2. The method of claim 1 , wherein vapor depositing uses chemical vapor deposition.

3. The method of claim 1 , wherein vapor depositing uses plasma-assisted chemical vapor deposition.

4. The method of claim 1 , further comprising partially ablating the at least one surface of the first layer of water-soluble polymeric material.

5. The method of claim 4 , wherein the at least one surface of the first layer of water-soluble polymeric material is partially ablated with one or more of a plasma treatment, a solvent treatment, a flame treatment, a photon ablation treatment, an electron beam irradiation treatment, an ion bombardment treatment, an ultraviolet treatment, a vacuum annealing treatment, or a physical abrasion treatment.

6. The method of claim 4 , wherein the at least one surface of the first layer of water-soluble polymeric material is partially ablated with helium-oxygen plasma or an argon-oxygen plasma.

7. The method of claim 1 , further comprising substantially fully ablating the at least one surface of the first layer of water-soluble polymeric material.

8. The method of claim 7 , wherein the at least one surface of the first layer of water-soluble polymeric material is substantially fully ablated with one or more of a plasma treatment, a solvent treatment, a flame treatment, a photon ablation treatment, an electron beam irradiation treatment, an ion bombardment treatment, an ultraviolet treatment, a vacuum annealing treatment, or a physical abrasion treatment.

9. The method of claim 7 , wherein the at least one surface of the first layer of water-soluble polymeric material is substantially fully ablated with helium-oxygen plasma or an argon-oxygen plasma.

10. The method of claim 1 , wherein the water-soluble polymeric material comprises polyvinyl alcohol.

11. The method of claim 1 , wherein the poly(p-xylylene) polymer comprises one or more of poly(p-xylylene) polymer, poly(dichloro-p-xylylene) polymer, α-perfluorodi-p-xylene polymer, and poly(tetrafluoro-p-xylylene) polymer.

12. The method of claim 1 , wherein the organic coating consists of the poly(p-xylylene) polymer.

13. The method of claim 1 , wherein the organic coating is directly attached to the surface of the first layer comprising the water-soluble polymeric material.

14. The method of claim 1 , wherein the organic coating has a thickness of from about 10 to about 500 nanometers.

15. The method of claim 1 , wherein the inorganic coating comprises a metal oxide.

16. The method of claim 1 , wherein the second layer is substantially free from microfractures and covers a portion of the plurality of microfractures in the third layer.

17. The method of claim 1 , wherein the third layer is directly attached to a surface of the first layer.

18. The method of claim 17 , wherein the second layer is directly attached to a surface of the third layer.

Assignees

• Procter & Gamble

Inventors

• Boswell Emily Charlotte
• Mirle Srinivas Krishnaswamy
• Shanov Vesselin Nikolov
• Malik Rachit
• Mcconnell Colin William

Classifications

• B05D1/60 Primary

  Deposition of organic layers from vapour phase (vapour phase deposition in general C23C14/00, C23C16/00) · CPC title

• B01D69/12

  Composite membranes; Ultra-thin membranes · CPC title

• B05D7/04

  to surfaces of films or sheets (producing layered products by applying coatings of pasty or pulverulent plastics B29C41/00) · CPC title

• B05D7/54

  No clear coat specified · CPC title

• B65D65/46

  Applications of disintegrable, dissolvable or edible materials · CPC title