Silicone-Glass Composite for Directional Flexibility
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Solution Overview
Problem
Silicone rubber products face limitations due to their inherent flexibility, which is undesirable in certain applications where reduced flexibility along a specific axis or direction is required, necessitating a modification of their natural flexibility characteristics while preserving other properties like drape-ability.
Innovation Solution
A composite material is created by incorporating a second material, such as fiber strands or woven fabric, within the silicone rubber, which resists elongation in specific directions, thereby controlling and modifying the flexibility characteristics of the resulting composite material. This is achieved through various manufacturing processes like hot pressing, hot rolling, and compression molding, where the second material is encapsulated or embedded within the silicone rubber to form a structured core that influences the final product's properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If silicone rubber is used to provide inherent flexibility and comfort, then the material exhibits excellent elasticity and skin comfort, but the flexibility is excessive and undesirable in applications requiring structural stability along specific axes
Solution Approach 1:
The patent applies composite materials by combining silicone rubber with a secondary material (such as fabric, foam, or rigid inserts) to create a hybrid structure. The silicone rubber provides flexibility and comfort, while the secondary material provides structural stability along specific axes. This composite approach allows both materials to contribute their advantageous properties to the final product, resolving the contradiction between excessive flexibility and needed structural stability.
Solution Approach 2:
The patent applies local quality by strategically placing the secondary material in specific regions or orientations within the silicone rubber matrix. Rather than uniformly distributing reinforcement, the secondary material is positioned to provide stability only in directions where it is needed, while preserving flexibility in other directions. This localized approach allows differential mechanical properties throughout the material structure.
2Adaptability or versatility
If the natural flexibility of silicone rubber is modified by adding secondary materials, then flexibility control along specific axes is achieved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-forming the secondary material into specific shapes, patterns, or configurations before incorporating it into the silicone rubber. The secondary material may be pre-cut, pre-shaped, or pre-positioned in molds to achieve the desired flexibility characteristics. This preliminary preparation simplifies the subsequent manufacturing steps and reduces overall manufacturing complexity while maintaining adaptability.
3Strength
If fiber strands or woven fabric are encapsulated within silicone rubber to resist elongation, then elongation resistance is improved, but the material becomes less compliant in bending
Solution Approach 1:
The patent applies local quality by orienting the fiber strands or woven fabric in specific directions within the silicone rubber matrix. The secondary material is aligned to provide elongation resistance primarily along the axis where tensile strength is needed, while allowing bending compliance in perpendicular directions. This directional arrangement allows the material to exhibit anisotropic properties, being strong in tension along specific axes but flexible in bending along other axes.
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 material exhibits tailored flexibility and strength characteristics, allowing for improved utility in applications like device covers, straps, and belts, where specific flexibility and drape-ability are needed, while maintaining the beneficial properties of silicone rubber like comfort and resistance to water and UV light.
Implementation Method 1
a second material that resists elongation in at least one direction
Implementation Method 2
applying heat and pressure to the first, second and third layers, thereby heating and pressing the first and third layers into the second layer
Implementation Method 3
a first flexible, bendable, elongatable material
Data Source
AI summary
Systems and methods of providing a composite material that is bendable but substantially resists stretching under tension. One embodiment may take the form of a composite material formed by over-molding a woven glass fiber with silicone. The woven glass fiber may be rolled out with a silicon polymer melted into the woven fabric as the rolling process continues. The composite of the two materials may provide a material that bends easily but does not substantially stretch.