Epoxy-Layer Oxygen Absorbent Material for Humid Storage
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Solution Overview
Problem
Existing oxygen absorbers are not suitable for storing hydrous articles or articles under high-humidity environments, as they often contain metal powders that can react unfavorably in such conditions.
Innovation Solution
An oxygen absorbent material comprising a base material, an inorganic layer, and a cured product layer of an epoxy resin composition with an amine-based curing agent, where the inorganic and cured product layers are adjacent, providing enhanced oxygen absorption and barrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If metal powder oxygen absorbers are used, then oxygen absorption capability is improved, but reliability deteriorates in high-humidity environments
Solution Approach 1:
The invention uses a composite material consisting of iron powder mixed with at least one compound selected from carboxylic acids, sulfonic acids, phosphoric acid, or boronic acid. This composite structure allows the iron powder to maintain its oxygen absorption capability while the acid compounds prevent unfavorable reactions in high-humidity environments, thus resolving the contradiction between oxygen absorption capability and reliability in humid conditions.
Solution Approach 2:
The acid compounds (carboxylic acids, sulfonic acids, phosphoric acid, or boronic acid) act as intermediaries between the iron powder and the high-humidity environment. These compounds prevent direct unfavorable reactions between the metal powder and moisture while allowing the iron powder to continue absorbing oxygen, thereby maintaining reliability without sacrificing oxygen absorption capability.
2Quantity of substance
If conventional oxygen absorbers are used, then oxygen-free state is achieved, but adaptability deteriorates for hydrous articles
Solution Approach 1:
The invention changes the chemical parameters of the oxygen absorber by introducing acid compounds (carboxylic acids, sulfonic acids, phosphoric acid, or boronic acid) into the iron powder composition. This parameter change makes the absorber compatible with hydrous articles by preventing unfavorable reactions in the presence of water, thereby improving adaptability while maintaining the ability to achieve an oxygen-free state.
3Quantity of substance
If iron powder is used as oxygen absorber, then oxygen absorption is improved, but harmful factors increase due to unfavorable reactions with water
Solution Approach 1:
The invention converts the potential harm of iron powder reacting unfavorably with water into a benefit by introducing acid compounds that control the reaction. These compounds prevent harmful reactions while allowing the iron powder to perform its oxygen absorption function, effectively turning a problematic property into a controlled and beneficial characteristic.
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 material effectively absorbs oxygen in high-humidity environments, protecting hydrous articles from oxidative deterioration by maintaining an oxygen-free state.
Implementation Method 1
an oxygen absorbent material including: a base material (I); an inorganic layer (II); and a cured product layer (III) of an epoxy resin composition containing an epoxy resin and an epoxy resin curing agent that contains an amine-based curing agent
Implementation Method 2
a cured product layer (III) of an epoxy resin composition containing an epoxy resin and an epoxy resin curing agent that contains an amine-based curing agent
Data Source
AI summary
Provided are: an oxygen absorbent material containing a base material (I), an inorganic layer (II), and a cured product layer (III) of an epoxy resin composition containing an epoxy resin and an epoxy resin curing agent that includes an amine-based curing agent, where the inorganic layer (II) and the cured product layer (III) are adjacent to each other; and a method for storing an article, the method including an aspect in which the article is accommodated in a packaging material in which the oxygen absorbent material described above is enclosed, and/or an aspect in which the article is accommodated in a packaging material at least partially including the oxygen absorbent material described above, and the packaging material has an oxygen transmission rate of 1 cc/(m2·day·atm) or less.