Multi-layer elastomeric materials for dynamic visual feedback
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Solution Overview
Problem
Existing color-changing materials rely on chemical additives or permanent deformation to indicate tension or extension, which can degrade performance and pose environmental or health risks, and lack durable solutions for dynamic visual feedback in consumer products.
Innovation Solution
A multi-layer system with thin, laminar materials of varying elasticities, where layers are joined at opposing edges perpendicular to the anticipated force vector, allowing relative movement and differential visibility of patterns or colors with tension changes, eliminating the need for chemical additives and ensuring durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If chemical additives or permanent deformation are used to indicate tension or extension, then color change or visual indication is achieved, but material durability decreases and environmental or health risks increase
Solution Approach 1:
The patent applies color change through structural means rather than chemical additives. Specifically, it uses layers with different elastic moduli that separate under tension to reveal hidden color patterns, or utilizes photoelastic materials that change optical properties under stress. This achieves visual indication without the durability and environmental issues of chemical additives.
Solution Approach 2:
The patent replaces chemical or permanent deformation-based indication systems with reversible mechanical/optical systems. The multi-layer structure with different elasticities provides reversible color change through mechanical separation, or photoelastic materials provide reversible optical property changes through mechanical stress, both eliminating the need for chemical additives.
2Ease of manufacture
If chemical additives are used to achieve color change, then visual feedback is provided, but environmental and health risks increase
Solution Approach 1:
The patent achieves color change through purely physical and structural mechanisms. The multi-layer approach uses layers with different elastic moduli that separate under tension to reveal hidden color patterns, while the photoelastic approach uses materials that change optical properties under stress. Both methods eliminate chemical additives entirely, removing environmental and health risks.
Solution Approach 2:
The patent uses inherently safe, non-chemical materials that can be safely disposed of or reused without environmental contamination. The structural color change mechanisms rely on physical layer separation or optical property changes in benign materials, eliminating the need for potentially harmful chemical additives.
3Ease of manufacture
If permanent deformation is used to indicate extension, then visual signal is provided, but material performance degrades
Solution Approach 1:
The patent implements reversible color change through structural separation of layers with different elastic moduli or through reversible photoelastic effects. The layers separate under tension to reveal color patterns and return to their original configuration when the load is removed, providing repeated visual signals without permanent deformation or performance degradation.
Solution Approach 2:
The patent creates a dynamic, reversible indication system where the multi-layer structure continuously adapts to applied loads. The layers dynamically separate and recombine based on the magnitude and duration of applied stress, providing real-time visual feedback that resets automatically when the load is removed, enabling repeated use without performance degradation.
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 system provides a durable, visually dynamic appearance that indicates tension or extension without chemical reliance, enhancing aesthetic value and user interaction, offering self-expression and feedback through dynamic patterns and colors.
Implementation Method 1
an outer layer including a first outer layer portion and a second outer layer portion, wherein the first outer layer segment has a different elasticity than the second outer layer segment; and an inner layer including a first inner layer segment and a second inner layer segment, wherein the first inner layer segment has a different elasticity than the second inner layer segment
Data Source
AI summary
The present disclosure provides a multi-layer system including at least two or more parallel layers of thin material unconnected within a layer but joined together by at least two opposing edges that are in series with an anticipated vector of mechanical force. Each layer includes two or more materials of different elasticities that are arranged in series with respect to the two fixed ends of the material. Each layer can possess a unique spatial arrangement of the different elastic segments. The relative movement of the material layers provides patterns within one or more of the layers that reveal colors, spaces, or patterns in the underlying layers depending on the amount of tension across the material. This allows for the dynamic change in outward appearance of the material with the increase and decrease of force.