Gel Detection Composition for Packaging Defect Positioning
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Solution Overview
Problem
Conventional methods for detecting the penetration of substances, such as oxygen, into packaged food are inadequate, particularly for food with complex shapes or under conditions like heat treatment, as existing detection compositions either flow or lack sufficient hardness, making it difficult to assess the barrier properties of packaging materials accurately.
Innovation Solution
A detection composition comprising a gel with a colorable aqueous solution and a crosslinked polymer, which retains its shape and color change upon contact with the substance, allowing for precise detection of penetration through the packaging material, even under heat treatment conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional aqueous solution detection composition is used, then the detection method is simple and inexpensive, but the composition flows and convectively circulates making it impossible to detect the specific penetration position
Solution Approach 1:
The patent changes the physical state parameter of the detection composition from liquid to gel. The gel formulation maintains the chemical detection properties of the aqueous solution while eliminating fluid flow and convection, enabling precise localization of penetration positions through static color change observation.
Solution Approach 2:
The patent creates a composite gel material combining detection chemicals (methylene blue, reducing agent) with gel-forming substances. This composite structure provides both the detection function and the structural stability needed to prevent flow, allowing the composition to remain in place and accurately indicate penetration locations.
2Adaptability or versatility
If the packaging material shape is changed to match food shape or heat treatment is applied, then the packaging evaluation is more realistic, but conventional detection methods cannot judge the barrier property under these conditions
Solution Approach 1:
The gel formulation allows the detection composition to maintain its shape and position under varying temperature conditions including heat treatment. The gel structure prevents flow at elevated temperatures, enabling reliable barrier property assessment under realistic packaging conditions that match various food shapes and treatments.
3Stability of the object's composition
If a film form detection means is used, then the detection composition does not flow, but it is impossible to test the barrier property under conditions matching various food forms or treatments
Solution Approach 1:
The gel-based detection composition creates a composite material that combines the shape stability of solids with the chemical detection properties of liquids. This composite structure can adapt to various food packaging conditions and shapes while maintaining positional stability, unlike rigid films that cannot conform to different geometries.
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
Enables effective detection of substance penetration and evaluation of packaging material performance, maintaining shape and sensitivity to detect defects like pinholes, thus ensuring food quality and extending storage life.
Implementation Method 1
a colorable aqueous solution (A) colored upon contact with the object substance (X)... containing methylene blue and a reducing agent in an amount that can change the methylene blue to substantially colorless in the presence of water
Implementation Method 2
a gel (Y) that contains a colorable aqueous solution (A) colored upon contact with the object substance (X) and a crosslinked polymer (B)
Data Source
Figure 1
Figure 2~3
AI summary
The present invention provides a composition for detecting an object substance (X). This detection composition contains a gel (Y). The gel (Y) contains a colorable aqueous solution (A) that can be colored upon contact with the object substance (X), and a crosslinked polymer (B). This composition is preferably used to evaluate packaging materials.