Moisture-Resistant Deoxidant Composition Using Water Repellent
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Solution Overview
Problem
Conventional deoxidants with iron powder, metal halides, and inorganic fillers fail to maintain oxygen absorption potency in high-humidity conditions due to moisture ingress, leading to increased packaging size and cost.
Innovation Solution
A deoxidant composition incorporating iron powder, a metal halide, and a water repellent, such as an alkali or alkaline earth metal salt of stearic acid, wrapped in a vapor-pervious material to form a compact pack that prevents moisture from coating the deoxidant surface, maintaining potency even in high-humidity environments without the need for inorganic fillers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large quantity of inorganic filler is added to disperse moisture, then the deoxidation potency preservability is improved, but the apparent volume of the deoxidant composition increases and the packaging size enlarges
Solution Approach 1:
The patent extracts and removes the inorganic filler component from the deoxidant composition, replacing it with a water repellent agent. This elimination of unnecessary components reduces the apparent volume while maintaining the core deoxidation function through the water repellent's ability to prevent moisture coating on the deoxidant surface.
Solution Approach 2:
The patent changes the chemical composition parameters by substituting inorganic filler with specific water repellent agents (metal soaps such as calcium stearate, magnesium stearate, or zinc stearate at 0.01-5 parts by weight per 100 parts of deoxidant). This parameter change transforms the mechanism from physical moisture dispersion to chemical water repellency, achieving compact formulation with improved potency preservability.
2Reliability
If inorganic filler is added to maintain deoxidation potency in high humidity, then the potency preservability is improved, but the cost increases due to larger packaging material requirements
Solution Approach 1:
The patent removes the costly inorganic filler component and replaces it with a small quantity of water repellent agent, thereby reducing the apparent volume and the amount of packaging material needed, which directly lowers manufacturing costs while maintaining high-humidity effectiveness.
Solution Approach 2:
The patent creates a composite deoxidant system combining the water repellent agent with the deoxidant composition, forming a functional composite that provides both moisture protection and deoxidation capabilities in a compact formulation, reducing overall system cost and packaging requirements.
3Reliability
If the deoxidant is used in high-humidity conditions without water repellent, then moisture coats the deoxidant surface stopping the reaction, but adding inorganic filler increases volume
Solution Approach 1:
The water repellent agent acts as an intermediary substance between the deoxidant composition and the external moisture environment. It forms a protective interface that prevents moisture from directly contacting and coating the deoxidant surface, thereby maintaining reaction continuity without requiring volume-increasing inorganic fillers.
Solution Approach 2:
The water repellent agent provides preliminary protection against moisture ingress by forming a water-repelling barrier on the deoxidant surface before moisture can cause harmful coating. This preemptive action prevents the stopping of deoxidation reactions in advance, eliminating the need for bulky moisture-dispersing fillers.
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 deoxidant composition effectively preserves oxygen absorption potency for an extended period in high-humidity conditions, reducing packaging volume and cost while maintaining effective deoxidation, suitable for preserving foods and medicines.
Implementation Method 1
when a deoxidant composition with a water repellent added thereto is used and even when used in high-humidity conditions, the moisture having penetrated into the deoxidant pack forms water droplets on the deoxidant composition, in stead of coating the deoxidant
Implementation Method 2
A deoxidant relying on the oxidation reaction of iron powder has been widely used... removing the oxygen from the container
Data Source
AI summary
A deoxidant composition comprising 100 parts by weight of iron powder, 0.01 to 20 parts by weight of metal halide and 0.01 to 5 parts by weight of water repellent agent. The deoxidant composition even when used in a high-humidity atmosphere can maintain oxygen absorption potency. A deoxidant pack for high humidity obtained by wrapping the deoxidant composition without mixing of any inorganic filler by means of an air-permeable packaging material can reduce the apparent volume of deoxidant composition, so that the amount of packaging material used in the production of the deoxidant pack can be reduced.