Bladder Multi-Layer Optical Film for Structural Color Without Dyes
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Solution Overview
Problem
Conventional methods of imparting color to man-made objects using dyes and pigments are environmentally unfriendly and lack aesthetic appeal, as they rely on chemical properties rather than physical interactions with light.
Innovation Solution
A multi-layer optical film is integrated into the bladder, which imparts structural color through physical interactions with light, eliminating the need for dyes or pigments and providing an aesthetically pleasing appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dyes or pigments are used to impart color to the bladder, then coloration is achieved, but environmental harm and aesthetic appeal are compromised
Solution Approach 1:
The patent replaces chemical coloration methods (dyes and pigments) with a physical/optical method using a multi-layer optical film that produces structural color through interference patterns. This substitution eliminates the need for harmful chemical substances while achieving the desired coloration effect through controlled light interaction with the multi-layer structure.
Solution Approach 2:
The invention employs a multi-layer optical film comprising multiple layers with different refractive indices and thicknesses. This composite structure creates constructive and destructive interference patterns that generate structural color, replacing single-material chemical coloration with a sophisticated multi-material optical system that is environmentally benign.
2Ease of manufacture
If dyes or pigments are used for coloration, then color is achieved, but aesthetic appeal and environmental friendliness deteriorate
Solution Approach 1:
The patent substitutes chemical coloration processes with a physical optical interference system. The multi-layer optical film generates color through precise control of layer thickness and refractive index, eliminating chemical pollution while maintaining ease of manufacture through a straightforward film application process.
Solution Approach 2:
The invention controls color output by adjusting physical parameters of the optical film layers, such as thickness and refractive index, rather than relying on chemical composition. This parameter-based control enables versatile coloration without introducing harmful chemicals into the manufacturing process or environment.
3Object-affected harmful factors
If a multi-layer optical film is used to impart structural color, then environmental friendliness and aesthetic appeal are improved, but device complexity increases
Solution Approach 1:
The patent uses a thin-film optical structure that can be applied as a flexible coating to the bladder surface. This approach maintains environmental friendliness while managing complexity by using a conformal thin-film deposition process that automatically adapts to the substrate geometry, reducing the practical complexity of implementing the multi-layer structure.
Solution Approach 2:
The multi-layer optical film serves multiple functions simultaneously: it provides structural coloration, acts as a protective coating, and can be applied to various bladder geometries. This multi-functionality justifies the increased structural complexity by delivering multiple benefits from a single integrated component.
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 multi-layer optical film effectively imparts structural color to the bladder, offering an environmentally friendly and visually appealing solution for various applications without the use of dyes or pigments, while maintaining durability and functionality.
Implementation Method 1
Structural color is caused by the physical interaction of light with the micro- or nano-features of a surface and the bulk material
Implementation Method 2
Color from dyes and pigments can be problematic in a number of ways. For example, dyes and pigments and their associated chemistries for fabrication and incorporation into finished goods may not be environmentally friendly.
Data Source
AI summary
One or more aspects of the present disclosure are directed to bladders that incorporate a multi-layer optical film that impart a structural color to the bladder. The present disclosure is also directed to articles including the bladders having a multi-layer optical film, and methods for making articles and bladders having a multi-layer optical film.