Tetralin Polyester Oxygen Absorber for Odor-Free Packaging
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Solution Overview
Problem
Conventional oxygen-absorbing resin compositions and packaging materials face issues such as low oxygen-absorbing performance, limited effectiveness in varying humidity conditions, odor production, and reduced strength after oxygen absorption, which affect the storage stability and quality of food and medical products.
Innovation Solution
A polyester compound with a tetralin ring combined with a transition metal catalyst is used to create an oxygen-absorbing resin composition that maintains strength and absorbs oxygen effectively across a wide range of humidity conditions without producing odors, integrated into multilayer bodies and containers for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If iron-based oxygen absorbent is used, then oxygen-absorbing ability is improved, but metal detector detection and microwave heating become problematic
Solution Approach 1:
The patent extracts the harmful metallic component (iron powder) from the oxygen-absorbing system and replaces it with organic peroxide compounds. This maintains the oxygen-absorbing function while eliminating the harmful effects of metal detection and microwave heating risks.
Solution Approach 2:
The patent changes the chemical composition parameters from metallic iron to organic peroxide compounds. This fundamental material substitution transforms the oxygen-absorbing mechanism from iron oxidation to peroxide decomposition, resolving the detection and heating issues while preserving oxygen absorption capability.
2Reliability
If iron powder oxidation reaction is used, then oxygen absorption occurs, but effectiveness is limited to moisture-rich articles only
Solution Approach 1:
The patent changes the chemical reaction mechanism from moisture-dependent iron oxidation to water-independent peroxide decomposition. The peroxide compounds decompose through thermal or catalytic pathways that do not require external moisture, enabling effective oxygen absorption in both low and high humidity conditions.
Solution Approach 2:
The patent substitutes the moisture-driven chemical reaction mechanism with a thermal/catalytic decomposition mechanism. This replacement eliminates the dependency on environmental moisture, allowing the oxygen-absorbing function to operate effectively across varying humidity conditions.
3Reliability
If conventional oxygen-absorbing multilayer film is used, then oxygen barrier property is improved, but opacity and insufficient visibility occur
Solution Approach 1:
The patent employs composite material structures combining oxygen-absorbing layers with transparent or translucent base materials. The oxygen-absorbing compounds are dispersed or layered in a way that maintains optical transparency while providing effective oxygen barrier properties, resolving the contradiction between protection and visibility.
4Reliability
If iron-based oxygen absorbent is used in packaging, then oxygen absorption occurs, but interlayer peeling and reduced strength occur after oxidation
Solution Approach 1:
The patent removes iron-based oxygen absorbents from the packaging structure and replaces them with organic peroxide compounds. This substitution eliminates the oxidation-induced strength degradation and interlayer peeling problems associated with iron-based systems, as the organic compounds do not undergo the same corrosive oxidation reactions.
Solution Approach 2:
The patent employs organic peroxide compounds that decompose cleanly without leaving residual corrosion products. These compounds provide temporary oxygen absorption during storage and then decompose into harmless byproducts, maintaining packaging integrity throughout their service life without the long-term strength degradation caused by iron oxidation.
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 solution provides excellent oxygen-absorbing performance, maintains container strength, and prevents odor production, ensuring the stability and quality of packaged goods across varying humidity levels, suitable for food, beverages, and medical products.
Implementation Method 1
a polyester compound having a tetralin ring and a transition metal catalyst
Implementation Method 2
a polyester compound having a tetralin ring and a transition metal catalyst
Data Source
AI summary
Oxygen-absorbing resin composition, not responsive to a metal detector, producing no odor after absorption of oxygen and has excellent oxygen-absorbing performance in a wide range of humidity conditions from low to high humidity. An oxygen-absorbing molded article, and a multilayer body, container, injection-molded article and medical containers also provided. The oxygen absorbing resin composition contains a polyester, comprising at least one constituent unit having a tetralin ring component compound, a transition metal catalyst, and a catalyst for producing the polyester. The oxygen-absorbing molded article of the present invention can be formed by molding the oxygen-absorbing resin composition into a film or a sheet. The multilayer body, container, injection-molded article, medical container, etc. of the present invention are obtained by using the oxygen-absorbing resin composition.