High chroma flakes

Patent metadata

Field	Value
Publication number	US-2022089878-A1
Application number	US-202117538684-A
Country	US
Kind code	A1
Filing date	Nov 30, 2021
Priority date	Jun 27, 2016
Publication date	Mar 24, 2022
Grant date	—

Abstract

An article including a reflector having a first surface and a second surface opposite the first surface; a first selective light modulator layer external to the first surface of the reflector; a second selective light modulator layer external to the second surface of the reflector; a first absorber layer external to the first selective light modulator layer; and a second absorber layer external to the second selective light modulator layer; wherein each of the first and second selective light modulator layers include a host material is disclosed herein. Methods of making the article are also disclosed.

First claim

1 - 13 . (canceled)

14 . A method for forming an article comprising:
depositing on a substrate a first absorber layer; depositing on the first absorber layer a first selective light modulator layer; depositing on the first selective light modulator layer a reflector; depositing on the reflector a second selective light modulator layer, and depositing on the first selective light modulator layer a second absorber layer; wherein at least one of the first selective light modulator layer and the second selective light modulator layer is deposited using a liquid coating process.

15 . The method of claim 14 , wherein the liquid coating process comprises curing each one of the deposited first and second selective light modulator layers.

16 . The method of claim 14 , wherein each of the first and second selective light modulator layers comprises a solvent and the method further comprises evaporating the solvent from each of the deposited first and second selective light modulator layers before curing each of the deposited first and second selective light modulator layers.

17 . The method of claim 14 , wherein a viscosity for each of the deposited first and second selective light modulator layers ranges from 10 to 3000 cP.

18 . The method of claim 14 , wherein each of the deposited first and second selective light modulator layers is deposited at a speed ranging from about 0.1 to about 1000 m/min.

19 . The method of claim 14 , wherein each of the deposited first and second selective light modulator layers with a greater original weight percent of solvent results in an end first and second selective light modulator layers having a lesser cured film thickness.

20 . A method of creating a metallic appearance on a substrate, comprising:
adding an article to a liquid medium to create a color shifting colorant; and applying the color shifting colorant to at least a portion of a substrate, wherein the color shifting colorant exhibits high chroma; wherein the article includes a reflector having a first surface and a second surface opposite the first surface; a first selective light modulator layer external to the first surface of the reflector; a second selective light modulator layer external to the second surface of the reflector; a first absorber layer external to the first selective light modulator layer; and a second absorber layer external to the second selective light modulator layer; wherein each of the first and second selective light modulator layers include a host material.

21 . The method of claim 14 , wherein the liquid coating process is a process chosen from slot-bead, slide bead, slot curtain, slide curtain, in single and multilayer coating, tensioned web, gravure, and roll coating.

22 . The method of claim 14 , wherein at least one of the first selective light modulator layer and the second selective light modulator layer includes at least one of (i) a photoinitiator including a phosphineoxide and (ii) an oxygen inhibition mitigation composition including at least one acrylate monomer and at least one acrylate oligomer.

23 . The method of claim 14 , wherein the first and second selective light modulator layer each independently include a selective light modulator particle including a color shifting particle, a reflective pigment, quantum dots, fluorides, or mixtures thereof.

24 . The method of claim 14 , wherein at least one of the first selective light modulator layer and the second selective light modulator layer has less than about 7% optical thickness variation across the layer.

25 . The method of claim 14 , further comprising, removing the substrate from the deposited layers.

26 . The method of claim 14 , wherein the at least one of the first selective light modulator layer and the second selective light modulator layer are deposited having a wet film thickness ranging from about 0.1 μm to about 500 μm.

27 . The method of claim 25 , further comprising, sizing the deposited layer.

28 . The method of claim 14 , wherein the liquid coating process comprises adjusting at least one of speed from about 5 to about 100 m/min and a coating gap from about 50 μm to about 100 μm to deposit a wet film from about 2 μm to 10 μm of the selective light modulator layer with a predetermined thickness from about 500 nm to about 1500 nm.

29 . The method of claim 14 , wherein the liquid coating process comprises depositing each of the first and second light modulator layers at a rate of from about 0.1 to about 1000 m/min.

30 . The method of claim 15 , wherein the step of curing uses an ultraviolet light at a dose ranging from about 200 mJ/cm 2 to about 1000 mJ/cm 2 .

31 . The method of claim 20 , wherein the liquid medium is a polymeric medium.

32 . The method of claim 20 , further comprising blending additives chosen from aluminum flakes, graphite, carbon aluminum flakes, mica flakes, aluminum powder, carbon black, and other organic and inorganic pigments.

Assignees

• Viavi Solutions Inc

Inventors

• Seydel Johannes
• Tevis Mark
• Liang Kangning
• Kuna Jeffrey James
• Zieba Jaroslaw
• Kohlmann Paul Thomas

Classifications

• G02B5/26 Primary

  Reflecting filters (G02B5/28 takes precedence) · CPC title

• C09C2200/505

  Inorganic particles, e.g. oxides, nitrides or carbides · CPC title

• C09C2220/20

  PVD, CVD methods or coating in a gas-phase using a fluidized bed · CPC title

• C09C2200/50

  Interference pigments comprising a layer or a core consisting of or comprising discrete particles, e.g. nanometric or submicrometer-sized particles · CPC title

• B32B7/023

  Optical properties · CPC title