Methods of making extensible barrier films

Patent metadata

Field	Value
Publication number	US-11518080-B2
Application number	US-201917250944-A
Country	US
Kind code	B2
Filing date	Oct 3, 2019
Priority date	Oct 16, 2018
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

There is provided a method of making a curved barrier film, including: depositing a barrier layer between a first organic layer and a second organic layer to form a barrier film; and thermoforming or vacuum-forming the barrier film from a flat barrier film to a curved barrier film; wherein the barrier film includes the barrier layer having two opposing major surfaces, wherein the barrier layer includes buckling deformations and non-buckling regions; the first organic layer in direct contact with one of the opposing major surfaces of the barrier layer; and the second organic layer in direct contact with the other of the opposing major surfaces of the barrier layer.

First claim

What is claimed is:

1. A method of making a curved barrier film, comprising:
(a) depositing a barrier layer between a first organic layer and a second organic layer to form a barrier film; and
(b) thermoforming the barrier film from a flat barrier film to a curved barrier film;
wherein the curved barrier film comprises
the barrier layer having two opposing major surfaces, wherein the barrier layer comprises buckling deformations and non-buckling regions;
the first organic layer in direct contact with one of the opposing major surfaces of the barrier layer,
the second organic layer in direct contact with the other of the opposing major surfaces of the barrier layer; and

wherein the curved barrier film is stretched to no less than 1% relative to its unstretched flat state.

2. The method of claim 1 , further comprising applying heat to the barrier film before the step (b).

3. The method of claim 1 , further comprising depositing the first organic layer or the second organic layer on a substrate.

4. The method of claim 3 , wherein the substrate is heat-shrinkable.

5. The method of claim 4 , wherein the heat-shrinkable substrate shrinks at a predetermined temperature.

6. The method of claim 4 , wherein the heat shrinkable substrate comprises an organic polymer.

7. The method of claim 1 , wherein the barrier layer comprises a metal oxide, a mixed metal oxide, a metal fluoride, a mixed metal fluoride, a metal nitride, a mixed metal nitride, a metal carbide, a mixed metal carbide, a metal carbonitride, a mixed metal carbonitride, a metal oxynitride, a mixed metal oxynitride, a metal boride, a mixed metal boride, a metal oxy boride, a mixed metal oxy boride, a metal silicide, a mixed metal silicide, or combinations thereof.

8. The method of claim 7 , wherein the barrier layer comprises metal oxide.

9. The method of claim 8 , wherein the metal oxide is silicon oxide, aluminum oxide, titanium oxide, indium oxide, tin oxide, indium tin oxide (ITO), hafnium oxide, tantalum oxide, zirconium oxide, zinc oxide, niobium oxide, or combinations thereof.

10. The method of claim 1 , wherein the first organic layer or the second organic layer comprises an acrylate.

Assignees

• 3M Innovative Properties Company

Inventors

• Rowe David J
• Lyons Christopher S
• Gotrik Kevin W
• Ambur Gregg A

Classifications

• C23C14/081

  of aluminium, magnesium or beryllium · CPC title

• B29K2067/003

  PET, i.e. poylethylene terephthalate · CPC title

• B29K2027/06

  PVC, i.e. polyvinylchloride · CPC title

• B29C51/14

  using multilayered preforms or sheets · CPC title

• B29C51/10 Primary

  Forming by pressure difference, e.g. vacuum · CPC title