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Iron-based optically variable pigment as well as preparation method and application thereof

A manufacturing method and pigment technology, applied in optics, optical components, instruments, etc., can solve problems such as increasing manufacturing costs, achieve better secondary peak absorption, make up for the decline in color information, and reduce manufacturing costs.

Active Publication Date: 2021-06-18
广东晟铂纳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain sufficiently high reflectivity and color saturation, all-dielectric optically variable pigments often require a large number of film layers to be laminated, which will inevitably increase the manufacturing cost

Method used

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  • Iron-based optically variable pigment as well as preparation method and application thereof
  • Iron-based optically variable pigment as well as preparation method and application thereof
  • Iron-based optically variable pigment as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] An iron-based optically variable pigment, comprising: an iron oxide central layer, multiple high-refractive-index layers, and multiple low-refractive-index layers; multiple high-refractive-index layers and multiple low-refractive-index layers are alternately stacked and arranged symmetrically on The upper and lower main surfaces of the iron oxide central layer; multiple cavity structures are arranged inside the iron oxide central layer.

[0040] It should be noted that the material of the high refractive index layer can be at least one of titanium dioxide, hafnium dioxide, tantalum pentoxide, zirconium dioxide, zinc sulfide, or other transparent dielectric materials with a refractive index higher than 2.0; low refractive index The material of the index layer can be one of silicon dioxide, aluminum oxide, magnesium fluoride or a mixture thereof, or any other low-refractive-index material whose refractive index is less than 1.65. The iron oxide center layer may be ferrous...

Embodiment 2

[0045] An iron-based optically variable pigment, see figure 1 , the iron-based optically variable pigment has a red-to-golden optically variable pigment structure. The film layer in the figure is only a schematic diagram of the number of layers. The middle layer is an iron oxide center layer made of ferrous oxide material, and the upper side is set with a silicon dioxide material with a low refractive index. layer, the low refractive index layer of silicon dioxide material is set on the high refractive index layer of titanium dioxide material, so that the high and low refractive index layers are arranged alternately, six layers are arranged on the upper side, and the same six layers are symmetrical on the lower side, and the material and thickness of the same distance on both sides are equal Symmetrical distribution. The specific film layer arrangement is shown in Table 1:

[0046] Table 1: Layer structure and thickness parameters of the di-iron-based optically variable pigme...

Embodiment 3

[0055] An iron-based optically variable pigment, see Figure 4 , the iron-based optically variable pigment is a green-to-blue optically variable pigment structure. The film layer in the figure is only a schematic diagram of the number of layers. The iron oxide center layer prepared by ferric oxide material is used in the middle, and silicon dioxide material is arranged on the upper side. Low-refractive index layer, low-refractive-index material silicon dioxide layer is set on high-refractive-index material titanium dioxide layer, so that high-refractive-index material film layers are arranged alternately, three layers are arranged on the upper side, and the same three layers are symmetrically arranged on the lower side, and the distance on both sides is the same The material and thickness are distributed symmetrically. The specific film layer arrangement is shown in Table 3:

[0056] Table 3: Example three iron-based optical variable pigment layer structure and thickness para...

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Abstract

The invention discloses an iron-based optically variable pigment as well as a preparation method and application thereof, and belongs to the technical field of optically variable pigments. The iron-based optically variable pigment comprises an iron oxide center layer, a plurality of high refractive index layers and a plurality of low refractive index layers, the multiple high-refractive-index layers and the multiple low-refractive-index layers are alternately stacked and symmetrically arranged on the main surfaces of the upper side and the lower side of the iron oxide center layer; and a plurality of cavity structures are arranged in the iron oxide center layer. The invention proposes an all-dielectric optically variable pigment which is composed of a high-refractive-index transparent dielectric material and takes an iron oxide material serves as the symmetric center layer, the iron oxide is used for increasing the degree of freedom of color regulation and control, and the cavity structures are arranged in the iron oxide center layer, so that when the observation angle changes, the color of the optically variable pigment changes obviously, bright color information can be provided, the problem that the full-dielectric optically variable pigment needs multilayer film deposition to achieve high saturation is solved, and the manufacturing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of optically variable pigments, in particular to an iron-based optically variable pigment and its manufacturing method and application. Background technique [0002] Optically variable pigments, based on the principle of thin film interference, show that the color of the pigment changes with the change of the viewing angle. Due to its non-reproducible optical effects and dynamic color changes, it is widely used in the field of anti-counterfeiting coatings and special effect pigments. In the field of optically variable pigments, the structure of traditional optically variable pigments is based on the Fabry-Perot five-layer symmetrical structure Cr / MgF2 / AL / MgF2 / Cr of metal dielectric materials, but heavy metal materials such as chromium and nickel are often used as half-layers in this structural material. The absorbing layer has potential hidden dangers to environmental safety. [0003] Another class of optic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/28
CPCG02B5/286
Inventor 周大坚
Owner 广东晟铂纳新材料科技有限公司
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