Solid Oxygen Absorbing Film Resists Delamination
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Solution Overview
Problem
Existing oxygen absorber films are inadequate for high humidity and low temperature applications, as they are either soluble in water, have low water vapor and oxygen permeability, or require moisture for activation, which can contaminate packaged products and lead to incomplete oxygen absorption, especially in refrigerated conditions.
Innovation Solution
A nonporous oxygen absorbing composition comprising a water insoluble resin with polyether and a water-activated oxygen absorber, which maintains high water vapor and oxygen permeability, ensuring effective oxygen absorption even at low temperatures without moisture contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If moisture is provided to activate water-activated oxygen absorbers, then oxygen absorption rate is improved, but moisture contamination of packaged products occurs
Solution Approach 1:
A moisture-permeable film acts as an intermediary barrier that allows water vapor to reach the oxygen absorber for activation while preventing liquid moisture from contaminating the packaged product. The film selectively permits water vapor transmission while blocking liquid penetration, resolving the contradiction between activation requirement and contamination prevention.
2Object-affected harmful factors
If film-based oxygen absorbers are used, then extraction contamination is prevented, but oxygen absorption rate is slower compared to sachet-based absorbers
Solution Approach 1:
The oxygen absorber is embedded in a porous matrix material that provides high surface area for oxygen reaction while maintaining film integrity. The porous structure allows rapid oxygen diffusion and absorption throughout the matrix, achieving sachet-like absorption rates while preventing extraction contamination through the continuous film structure.
Solution Approach 2:
The oxygen absorber matrix uses specific physical and chemical parameters including porosity, surface area, and material composition optimized for rapid oxygen uptake. By controlling particle size, pore distribution, and reactive surface area density, the film achieves fast oxygen absorption kinetics comparable to sachet systems.
3Reliability
If conventional oxygen absorbers are used in refrigerated conditions, then oxygen absorption is insufficient, but increasing moisture content to improve absorption leads to product degradation
Solution Approach 1:
The moisture-permeable film continues to serve as an intermediary that enables water vapor transmission for absorber activation in cold conditions without adding excess moisture that would cause product degradation. The film's selective permeability maintains the contradiction resolution across temperature conditions.
Solution Approach 2:
The oxygen absorber matrix composition and structure are optimized for low-temperature performance by adjusting reactive material selection, surface area density, and pore characteristics to maintain high oxygen absorption rates at refrigeration temperatures without requiring increased moisture content.
4Quantity of substance
If water-soluble oxygen absorbers are used, then oxygen absorption capacity is high, but delamination and extractable contamination occur
Solution Approach 1:
The oxygen absorber is embedded in a composite matrix combining water-soluble oxygen-reactive materials with water-insoluble structural materials. This composite structure provides high oxygen absorption capacity from the soluble component while the insoluble matrix maintains film integrity, prevents delamination, and blocks extractable contamination.
Solution Approach 2:
The water-insoluble matrix acts as an intermediary framework that supports the water-soluble oxygen absorber particles, enabling them to function at high concentrations without causing film delamination or extractable contamination. The matrix provides structural stability while allowing oxygen absorption functionality.
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 composition ensures extended shelf life for packaged products by maintaining high water vapor and oxygen permeability, enabling rapid and efficient oxygen absorption at various temperatures, including refrigeration conditions, while preventing delamination and extractable contamination.
Implementation Method 1
A nonporous oxygen absorbing composition comprising a water insoluble resin with polyether and a water-activated oxygen absorber, which maintains high water vapor and oxygen permeability, ensuring effective oxygen absorption even at low temperatures
Implementation Method 2
maintains high water vapor and oxygen permeability, enabling rapid and efficient oxygen absorption at various temperatures, including refrigeration conditions
Data Source
AI summary
A multilayer nonporous oxygen absorbing structure that resists delamination, e.g., humidity induced delamination, including a first layer having a first continuous polymer phase, a first water insoluble, dispersed, polyether resin phase in the first continuous polymer phase, and a water activated oxygen absorber, and a second layer having a second continuous polymer phase, bonded to the first layer.