Composite White Pigment Gloss Whiteness Segmentation
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Solution Overview
Problem
Conventional white pigments lack gloss and whiteness, making them unsuitable for applications requiring high aesthetic value.
Innovation Solution
A composite white pigment is developed by combining two white pigments with different metal oxide layer thicknesses and refractive index structures, including a high refractive layer, a low refractive layer, and another high refractive layer, to achieve enhanced gloss and whiteness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a metal oxide layer is coated on a plate substrate to create a white pigment, then the pigment provides basic white color, but it lacks gloss and has low whiteness
Solution Approach 1:
The white pigment is segmented into multiple types (first white pigment with thinner metal oxide layer and second white pigment with thicker metal oxide layer) that are mixed together. Each segment contributes different optical properties, and their combination achieves both high whiteness and gloss by optimizing the overall light reflection characteristics.
Solution Approach 2:
The invention uses a composite structure consisting of a plate substrate (mica) combined with a metal oxide layer (TiO2), and further composites multiple types of white pigments with different metal oxide layer thicknesses. This composite material approach allows the pigment to exhibit both high whiteness and gloss properties that cannot be achieved with a single uniform structure.
2Quantity of substance
If the metal oxide layer thickness is increased to improve whiteness, then coverage is enhanced, but gloss is reduced
Solution Approach 1:
The metal oxide layer thickness is segmented into two ranges: 30-80 nm for the first white pigment and 60-100 nm for the second white pigment. By mixing these segmented types in appropriate proportions, the composition achieves both sufficient whiteness (through adequate metal oxide quantity) and gloss (through presence of thinner layers that reflect light more effectively).
Solution Approach 2:
The invention changes the parameter of metal oxide layer thickness to create different pigment types. By controlling the thickness parameter within specific ranges and mixing the resulting pigments, the composition achieves optimal balance between whiteness and gloss, resolving the trade-off between these two properties.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composite white pigment exhibits improved gloss and whiteness, allowing for the production of various tone shades from red to green, enhancing aesthetic appeal in applications such as cosmetics, paints, and plastics.
Implementation Method 1
a first high refractive layer formed on a surface of the substrate and containing TiO2
Implementation Method 2
the white pigment having excellent gloss and white degree
Data Source
AI summary
Disclosed is a composite white pigment having mixed together white pigments having different colorimeter values from each other by comprising substrates having various sizes and/or TiO2 having various thicknesses. The composite white pigment, according to the present invention, comprises: a first white pigment comprising a substrate and a white metal oxide layer formed on the substrate; and a second white pigment comprising a substrate and a white metal oxide layer formed on the substrate, and having a different colorimeter value from that of the first white pigment.