Structured film laminate with antistatic compositions embedded therein

Patent metadata

Field	Value
Publication number	US-11214026-B2
Application number	US-201515781294-A
Country	US
Kind code	B2
Filing date	Dec 4, 2015
Priority date	Dec 4, 2015
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

Embodiments of the disclosure relate to an antistatic film structure which comprises a transparent antistatic support structure and at least one antistatic component. The transparent antistatic support structure and antistatic component may be combined by imbibing, melt extruding, blown film extruding, calendaring, solvent casting, mold casting, wet transfer, sublimation, and solidification of a liquid to a solid using heat, UV or other means.

First claim

The invention claimed is:

1. An optical article comprising a substrate and an antistatic film structure deposited onto said substrate that comprises a transparent antistatic support structure comprising at least one antistatic component, wherein the transparent antistatic support structure comprises cellulose triacetate, and
wherein the antistatic film structure is coated with an enhancing layer comprising at least one enhancing additive selected from the group consisting of diethylene glycol, diethylene monoether glycol, diethylene diether glycol, polyethylene glycol, and any combination thereof and wherein the enhancing layer additive is added in an amount ranging from 1 to 10 wt % of the enhancing layer.

2. The optical article of claim 1 , wherein the transparent antistatic support structure further comprises at least one antistatic component selected from the group consisting of graphene, single or multi-wall native or derivatized carbon nanotubes, semiconducting materials, core-shell conductive nanoparticles, organic conductive materials or polymers or co-polymers thereof, organic or inorganic ionic salts or materials, conductive colloids, ionic resins, and mixtures thereof.

3. The optical article of claim 1 , wherein the transparent antistatic support structure is produced by combining a transparent support structure with at least one antistatic component by imbibing, melt extruding, blown film extruding, calendaring, solvent casting, mold casting, wet transfer, sublimation, or solidification of a liquid to a solid using heat, UV or other means.

4. The optical article of claim 1 , wherein the antistatic film structure further comprises a polarizing element.

5. The optical article of claim 4 , wherein the polarizing element of said antistatic film structure comprises polyvinyl alcohol (PVA) film.

6. The optical article of claim 2 , wherein the inorganic ionic salt or material comprises vanadium oxide, antimony oxide, tantalum oxide, cerium oxide, tin oxide, titanium oxide, indium oxide, zinc oxide, tin-doped indium oxide, antimony-doped tin oxide, fluorine-doped tin oxide, phosphorus-doped tin oxide, zinc antimonate, indium antimonite, indium-doped zinc oxide, lithium salts, silver, gold, nickel, aluminum, silicon nitride, magnesium fluoride, or a combination thereof.

7. The optical article of claim 1 , comprising a relative light transmission factor in the visible spectrum, Tv, that is greater than 85%.

8. The optical article of claim 7 , comprising a relative light transmission factor in the visible spectrum, Tv, that is greater than 90%.

9. The optical article of claim 1 , wherein the transparent antistatic support structure comprises a thickness ranging from 50 nm to 2 μm.

10. The optical article of claim 9 , wherein the transparent antistatic support structure comprises a thickness ranging from 100 nm to 1.5 μm.

11. The optical article of claim 9 , wherein the transparent antistatic support structure comprises a thickness ranging from 100 nm to 1 μm.

12. The optical article of claim 1 , comprising a haze value of less than 1.0%.

13. The optical article of claim 12 , comprising a haze value of less than 0.5%.

14. A method for producing an antistatic film structure of an optical article comprising combining at least one antistatic component with a transparent support structure to give a transparent antistatic support structure comprising at least one antistatic component, wherein the antistatic film structure comprises an enhancing layer comprising at least one enhancing additive selected from the group consisting of diethylene glycol, diethylene monoether glycol, diethylene diether glycol, polyethylene glycol, and any combination thereof and wherein the enhancing layer additive is added in an amount ranging from 1 to 10 wt % of the enhancing layer, and wherein the at least one antistatic component and transparent support structure are combined by a process comprising imbibing, melt extruding, blown film extruding, calendaring, solvent casting, mold casting, wet transfer, sublimation, or solidification of a liquid to a solid using heat, UV, or other means.

15. The method of claim 14 , wherein the at least one antistatic component comprises at least one component selected from the group consisting of graphene, single or multi-wall native or derivatized carbon nanotubes, semiconducting materials, core-shell conductive nanoparticles, organic conductive materials or polymers or co-polymers thereof, organic or inorganic ionic salts or materials, conductive colloids, ionic resins, and mixtures thereof.

16. The method of claim 14 , wherein the transparent support structure comprises a polymer selected from the group consisting of native or derivatized cellulose, polyesters, polyvinyl acetates, polyacrylonitriles, polybutadienes, polystyrenes, polycarbonates, polyacrylates, copolymers and mixtures thereof.

17. The method of claim 16 , wherein the transparent support structure comprises cellulose triacetate.

18. The method of claim 14 , wherein the method further comprises combining a polarizing element with the antistatic film structure.

19. The method of claim 18 , wherein the polarizing element comprises polyvinyl alcohol (PVA) film.

Assignees

• Essilor Int

Inventors

• Berzon Ronald A
• Zheng Haipeng

Classifications

• G02B5/3033 Primary

  in the form of a thin sheet or foil, e.g. Polaroid · CPC title

• C08K3/16

  Halogen-containing compounds · CPC title

• C08K2201/001

  Conductive additives · CPC title

• C08K3/042

  Graphene or derivatives, e.g. graphene oxides · CPC title

• C08L2201/10

  Transparent films; Clear coatings; Transparent materials · CPC title