# US 12,001,036 B2 · Multilayer optical films and articles comprising the same

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- Number: US 12,001,036 B2
- Document ID: US12001036B2
- Status: Granted
- Kind: B2
- Application number: 17/280,447
- Filed: 2019-09-25
- Published: 2022-01-06
- Granted: 2024-06-04
- Earliest claimed: 2018-10-05
- Assignees: 3M Innovative Properties Company
- Applicants: 3M Innovative Properties Company
- Inventors: Timothy J. Hebrink; Stephen P. Maki; Charles D. Hoyle; Joel D. Oxman; Matthew T. Scholz; Justin M. Mazzoni; Michael E. Griffin; Anna C. Hamlin
- Web page: https://patentgrep.com/patent/US12001036B2

## CPC

- G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation}
- B32B 7/02: Physical, chemical or physicochemical properties
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- C08K 3/28: Nitrogen-containing compounds
- C08L 23/08: Copolymers of ethene (C08L23/16 takes precedence)
- C08L 27/18: Homopolymers or copolymers or tetrafluoroethene
- G02B 1/04: made of organic materials, e.g. plastics (G02B1/08 takes precedence)
- G02B 1/115: Multilayers
- G02B 5/283: {designed for the ultraviolet}
- G02B 5/287: {comprising at least one layer of organic material}
- C08L 2201/10: Transparent films; Clear coatings; Transparent materials
- C08L 2203/20: use in electrical or conductive gadgets
- G02B 19/0095: {for use with ultraviolet radiation}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Multilayer optical film comprising at least a plurality of alternating first and second optical layers. Embodiments of the multilayer optical film are useful, for example, in UV-C shield, UV-C light collimator, and UV-C light concentrator applications.

## Claims

### Claim 1

A multilayer optical film comprising at least a plurality of alternating first and second optical layers collectively reflecting at least one of 0°, 30°, 45°, 60°, or 75° incident light angle at least 30 percent of incident ultraviolet light over at least a 30-nanometer wavelength reflection bandwidth in a wavelength range from at least 100 nanometers to 280 nanometers,
wherein the at least first optical layer comprises at least one polyethylene copolymer, and wherein the second optical layer comprises at least one of a copolymer comprising tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride, a copolymer comprising tetrafluoro-ethylene and hexafluoropropylene, or perfluoroalkoxy alkane.

### Claim 2 (depends on 1)

The multilayer optical film of claim 1, wherein incident visible light transmission through at least the plurality of alternating first and second optical layers is greater than 30 percent over at least a 30-nanometer wavelength reflection bandwidth in a wavelength range from at least 400 nanometers to 750 nanometers.

### Claim 3 (depends on 1)

The multilayer optical film of claim 1, wherein the at least first optical layer comprises at least one of titania, zirconia, zirconium oxynitride, hafnia, or alumina, and wherein the second optical layer comprises at least one of silica, aluminum fluoride, or magnesium fluoride.

### Claim 4 (depends on 1)

An UV-C shield comprising the multilayer optical film of claim 1.

### Claim 5 (depends on 1)

An UV-C light collimator comprising the multilayer optical film of claim 1.

### Claim 6 (depends on 1)

An UV-C light concentrator comprising the multilayer optical film of claim 1.

### Claim 7 (depends on 1)

A UV-C disinfection device comprising the multilayer optical film of claim 1.