Wetness indicator fabric

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Solution Overview

Problem

Conventional garments do not effectively indicate moisture absorption, leading to discomfort and unawareness of wet conditions, especially in environments like grass fields.

Innovation Solution

A wetness indicator fabric with a water-repellant coating pattern that becomes visible upon moisture absorption, providing visual cues while maintaining breathability and comfort.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a water-repellant coating is applied to the entire fabric surface, then moisture protection is improved, but breathability deteriorates

Engineering Contradiction:
Improvemoisture protectionVSAvoidbreathability
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies water-repellant coating only to specific discrete shapes (circles, squares, triangles, polygons) rather than the entire fabric surface. This localized application provides moisture protection at targeted areas while leaving the rest of the fabric breathable, thus resolving the contradiction between moisture protection and breathability.

Inventive Principle:
Principle #3Local quality

2Loss of information

If the water-repellant coating pattern is applied, then visual indication of wetness is improved, but manufacturing complexity increases

Engineering Contradiction:
Improvevisual indication of wetnessVSAvoidmanufacturing complexity
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent utilizes the color change property of water-repellant coatings when they become wet. The discrete shaped coatings change appearance upon contact with moisture, providing visual indication of wetness conditions. This approach achieves information transmission through simple material property changes rather than complex sensing mechanisms.

Inventive Principle:
Principle #32Color changes

3Object-generated harmful factors

If discrete shaped water-repellant coatings are applied, then breathability is improved, but moisture protection deteriorates

Engineering Contradiction:
ImprovebreathabilityVSAvoidmoisture protection
Core Design Contradiction:
Object-generated harmful factorsVSReliability

Solution Approach 1:

The patent divides the water-repellant coating into multiple discrete shapes (circles, squares, triangles, polygons) distributed across the fabric surface. This segmentation allows the fabric to maintain breathability in the spaces between shapes while providing moisture protection at each discrete coated area, balancing both requirements.

Inventive Principle:
Principle #1Segmentation

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 fabric effectively signals moisture presence through a visible pattern, protecting against saturation and maintaining comfort without compromising breathability.

Implementation Method 1

the exposed surface is provided with a water-repellant coating material applied in a pattern on at least a portion of the wetness indicator fabric or textile

Methodology Applied
Scientific EffectWater-repellant coating: Hydrophobe

Data Source

PatentEP4218470B1Wetness indicator fabric
Publication Date: 2026.04.22 NIKE INNOVATE CV
  • EP4218470B1 patent drawingFigure 1A~1B
  • EP4218470B1 patent drawingFigure 1C
  • EP4218470B1 patent drawingFigure 2

AI summary

The technology described herein relates to a wetness indicator textile material comprising: a first surface and a second surface; and a pattern of a water-repellant coating applied on to the first surface, the pattern comprising a plurality of discrete shapes, wherein each shape is surrounded by one or more portions of the textile material that do not have the water-repellant coating applied on to the first surface, and wherein a size of the plurality of discrete shapes is greater at a first area of the textile material as compared to a second area of the textile material. Further, the technology described herein relates to a method of making such wetness indicator textile material.