Reflective fabrics

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Solution Overview

Problem

Retro-reflective technology is not effectively integrated into fashionable everyday garments due to aesthetic concerns and the limitations of existing methods, which compromise the fabric's breathability and durability.

Innovation Solution

Incorporation of uniquely engineered retro-reflective yarns during fabric construction, such as weaving or knitting, combined with invisible reflective printing, to create stealthily reflective fabrics that maintain aesthetic appeal and enhance durability without adverse effects on breathability or performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If reflective inks are printed on the fabric surface, then nighttime visibility is improved, but breathability is restricted

Engineering Contradiction:

Improvenighttime visibilityVSAvoidbreathability restriction

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The fabric is divided into yarn-level reflective elements integrated during construction, separating the reflective function from the breathability function. The reflective yarns are distributed throughout the fabric structure rather than applied as a continuous surface coating, allowing air permeability to pass through the fabric while maintaining nighttime visibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of applying reflective material on the fabric surface (conventional approach), the invention integrates reflective elements during the fabric construction process itself. This inverts the traditional sequence where reflectivity is added after fabric production, allowing the fabric structure and reflective properties to be developed simultaneously without compromising breathability.

Inventive Principle:

Principle #13The other way round (Inversion)

2Illumination intensity

If reflective tapes are adhered to garment surfaces, then retro-reflective performance is achieved, but aesthetic appeal is compromised

Engineering Contradiction:

Improveretro-reflective performanceVSAvoidaesthetic appeal

Core Design Contradiction:

Illumination intensityVSShape

Solution Approach 1:

The reflective function is merged with the fabric construction process itself. Reflective yarns are incorporated during weaving or knitting, combining the structural and aesthetic functions of the fabric with the safety function of retro-reflection. This eliminates the need for separate reflective tape applications that would compromise aesthetics.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fabric structure serves multiple functions simultaneously: it provides the base garment structure, maintains aesthetic appearance during daytime wear, and delivers retro-reflective performance at nighttime. The integrated reflective yarns enable the same fabric to fulfill both fashion and safety roles without requiring separate components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Illumination intensity

If reflective yarns are incorporated into fabric, then nighttime visibility is enhanced, but manufacturing complexity increases

Engineering Contradiction:

Improvenighttime visibilityVSAvoidmanufacturing complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

Reflective yarns are prepared and positioned during the fabric construction process itself, before the final garment is assembled. This preliminary integration of reflective elements during weaving or knitting eliminates the need for subsequent application steps, reducing overall manufacturing complexity despite the specialized nature of the reflective yarns.

Inventive Principle:

Principle #10Preliminary action

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 solution provides enhanced nighttime safety through improved visibility while maintaining the fabric's aesthetic appeal and performance, with increased durability and reduced reflective ink usage, ensuring effective reflectivity and durability in garments.

Implementation Method 1

The placement of glass beads upon a surface to create a retro-reflective surface has been conventionally employed for some time. In general, glass beads are adhered to a reflective surface and act as a lens for transmission and reflection of incident light.

Methodology Applied

Scientific EffectRetro-reflection: Retroreflector

Implementation Method 2

Yarns containing retro-reflective technology have been produced for incorporation into garments. These retro-reflective yarns are typically made by converting/slitting 3M Scotchlite reflective and the like tapes into very fine/narrow yarns.

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUS11576444B2Reflective fabrics

Publication Date: 2023.02.14 THE H D LEE CO INC

AI summary

Disclosed is a retro-reflective fabric, having an inner surface and an outer surface; one or more strands of retro-reflective yarn incorporated into the fabric; and a reflective ink coupled to the outer surface of the fabric. Also provided is a method of making a retro-reflective fabric, including: providing a coated retro-reflective yarn; incorporating the coated retro-reflective yarn into the weave or knit of a fabric; and disposing a reflective ink into an outward facing surface of the fabric.