Multilayer Fabric with Ceramic Micro-Particle Radiation Filter
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Solution Overview
Problem
Existing athletic apparel fails to effectively manage heat radiation, leading to discomfort during outdoor activities due to inadequate control of solar and far infrared radiation, which affects thermoregulation and athletic performance.
Innovation Solution
A multilayer fabric incorporating a microporous water vapor permeable layer with controlled pore size, allowing selective transmission or reflection of far infrared and solar radiation, coupled with textile layers to enhance comfort and performance by optimizing heat dissipation and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If continuous layers of metal or metal oxides are deposited on the surface to control solar and FIR radiation, then radiation control is improved, but water vapor permeability deteriorates
Solution Approach 1:
The patent employs a porous polymer layer containing ceramic micro-particles instead of continuous metal layers. The porous structure allows water vapor to pass through while the ceramic particles scatter and reflect infrared radiation. This resolves the contradiction by providing radiation control through particle dispersion rather than continuous coating, maintaining breathability.
Solution Approach 2:
The invention creates a composite material combining polymer matrix with embedded ceramic micro-particles (such as aluminum oxide, titanium oxide, or zinc oxide). This composite approach provides both the radiation scattering properties of ceramics and the porosity/permeability of the polymer structure, achieving dual functionality without the drawbacks of pure metal coatings.
2Object-affected harmful factors
If metal oxides or ceramic micro-particles are embedded in polymer structure to scatter and reflect FIR or solar radiation, then radiation scattering is improved, but water vapor transmission deteriorates
Solution Approach 1:
The patent distributes ceramic micro-particles locally within the polymer matrix rather than creating a continuous barrier. The particles are dispersed at specific concentrations (0.1-10% by weight) to provide radiation scattering only where needed, while the surrounding polymer matrix maintains its water vapor transmission properties. This localized approach prevents overall permeability deterioration.
Solution Approach 2:
The invention optimizes particle size parameters (1-100 micrometers) and concentration parameters to achieve effective radiation scattering while minimizing impact on vapor transmission. By controlling these parameters, the patent finds the optimal balance between radiation control and breathability that would not be achievable with fixed material compositions.
3Temperature
If clothing blocks solar radiation to reduce heat gain, then thermal comfort is improved, but heat dissipation from the body deteriorates
Solution Approach 1:
The patent uses the same ceramic micro-particles to achieve dual functionality: they scatter incoming solar radiation (reducing heat gain) while simultaneously allowing outgoing far-infrared radiation from the body to pass through (maintaining heat dissipation). The particles' selective scattering properties convert the potential harm of solar blocking into the benefit of thermal regulation by differentiating between incoming and outgoing radiation paths.
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 multilayer fabric effectively regulates body temperature by controlling heat radiation, improving comfort and performance by allowing optimal transmission or reflection of specific wavelengths, thus mitigating discomfort in various weather conditions.
Implementation Method 1
a microporous water vapor permeable layer with a pore size in the range between 1.0 microns and 14.0 microns, the microporous water vapor permeable layer being configured to allow the transmission of far infrared (FIR) radiation and solar radiation
Implementation Method 2
Another approach uses metal oxides or ceramic micro-particles embedded in the structure of a polymer in order to scatter and/or partially reflect FIR or solar radiation
Data Source
AI summary
A multilayer fabric for selectively blocking or transmitting particular wavelengths in the electromagnetic spectrum, such solar radiation, and far infrared (FIR) radiation. The multilayer fabric may include a microporous water vapor permeable layer that selectively filters particular wavelengths depending on the size of its pores. In some embodiments, the multilayer fabric may include a nanostructured layer that selectively filters particular wavelengths.