Polymer Label for Waterlogging Detection
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Solution Overview
Problem
Conventional water-ingress labels are not durable enough to withstand high temperatures, high humidity, and waterlogging, leading to rapid discoloration and loss of product information, making it difficult to identify and maintain products over time, especially in dark or deep locations.
Innovation Solution
A durable identification polymer label with a color change layer matrix composed of crosslinked hydrophilic and hydrophobic polymers and a pigment layer matrix containing aqueous pigments, which can be visually recognized even under adverse conditions, using a specific weight ratio of hydrophilic to hydrophobic polymers to ensure stability and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional water-ingress labels use paper or soluble polymer substrates, then water absorption and color development occur rapidly, but durability against high temperature, high humidity, waterlogging, solvent, friction, and impact is poor
Solution Approach 1:
The patent uses a composite polymer substrate formed by crosslinking hydrophilic polymer chains (for water absorption) with hydrophobic polymer chains (for durability). This composite structure allows the material to simultaneously exhibit rapid water absorption capabilities and high resistance to environmental factors such as heat, humidity, and mechanical stress.
Solution Approach 2:
The patent modifies the chemical parameters of the polymer substrate by introducing crosslinking between hydrophilic and hydrophobic polymer chains. This parameter change transforms the substrate from a simple soluble polymer or paper into a durable hydrogel-like structure that maintains structural integrity while enabling controlled water absorption and color development.
2Ease of manufacture
If conventional water-ingress labels use simple polymer structures, then fabrication is easy, but long-term identification capability after waterlogging is lost due to damage
Solution Approach 1:
The patent employs a composite polymer system combining hydrophilic and hydrophobic chains that can be fabricated using conventional coating and curing processes. The crosslinked structure provides long-term durability and identification capability while maintaining relative ease of manufacture through standard polymer processing techniques.
Solution Approach 2:
The patent creates local quality differentiation within the polymer substrate by distributing hydrophilic and hydrophobic regions throughout the material. The hydrophilic regions facilitate water absorption and color development, while the hydrophobic regions provide structural durability and resistance to environmental degradation, enabling both long-term functionality and reasonable fabrication simplicity.
3Device complexity
If conventional labels use single-layer structures, then device complexity is low, but stability against discoloration and moisture resistance are insufficient
Solution Approach 1:
The patent creates a multi-functional composite polymer material where hydrophilic and hydrophobic polymer chains are crosslinked together. This composite structure provides both moisture resistance (from hydrophobic regions) and controlled water absorption (from hydrophilic regions), achieving superior stability against discoloration without requiring multiple separate layers.
Solution Approach 2:
The patent designs the crosslinked polymer substrate to perform multiple functions simultaneously: it serves as the structural base, the water absorption medium, and the color development matrix. This multi-functionality is achieved through the integrated hydrophilic-hydrophobic polymer system, eliminating the need for separate functional layers and maintaining low device complexity while achieving high reliability.
4Loss of information
If conventional labels are attached to dark places or deep parts, then product information can be marked, but visual recognition is difficult without disassembly
Solution Approach 1:
The patent incorporates color-changing functionality into the label through the use of pH-sensitive or water-sensitive dyes embedded in the crosslinked polymer matrix. When waterlogging occurs, the label undergoes a visible color change that can be easily detected even in dark or confined locations, eliminating the need for disassembly to verify product information or water damage status.
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 label effectively maintains product information visibility and minimizes damage by preventing discoloration and ensuring long-term identification of waterlogging, allowing for accurate inspection and maintenance without disassembly, even in challenging environments.
Implementation Method 1
a color change layer matrix containing a resin in which a hydrophilic polymer and a hydrophobic polymer are crosslinked with each other
Implementation Method 2
a pigment layer matrix containing an aqueous pigment in the resin
Data Source
AI summary
The present invention relates to an identification polymer label for inspection and maintenance of parts and an identification method using the same. The present invention provides a durable polymer material label including: a color change layer matrix containing a resin in which a hydrophilic polymer and a hydrophobic polymer are crosslinked; and a pigment layer matrix containing an aqueous pigment in the resin. Due to the stability against discoloration, moisture resistance, and durability of the color change layer matrix and the pigment layer matrix, the polymer label is effective for long-term identification of production information, and waterlogging thereof may be identified. Due to the aqueous fluorescent pigment contained in the pigment layer matrix, even when the identification label is attached to a dark place or and a deep portion or even at night, it may be visually recognized by visual inspection or optical detection.