Tetralin Polyamide Oxygen Absorber for Odor-Free Packaging
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Solution Overview
Problem
Conventional oxygen-absorbing resin compositions used in packaging materials face issues such as low oxygen-absorbing performance, limited effectiveness in non-moisture environments, odor production due to oxidation, and reduced container strength after oxygen absorption, which affects the storage stability of food and pharmaceuticals.
Innovation Solution
A polyamide compound with a tetralin ring and a transition metal catalyst, specifically manganese, iron, cobalt, nickel, or copper, is used in an oxygen-absorbing resin composition to create a multilayer body or container that absorbs oxygen across a wide humidity range without producing odors and maintaining strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If iron-based oxygen absorbent is used, then oxygen-absorbing ability is improved, but the container responds to metal detector and cannot be microwaved
Solution Approach 1:
The patent replaces permanent metal components (iron powder) with organic oxygen-absorbing resin that serves its function and then degrades harmlessly, eliminating the need for metal detection while maintaining oxygen-absorbing capability throughout the product lifecycle
Solution Approach 2:
The patent changes the material composition from inorganic metal-based oxygen absorbent to organic resin-based oxygen absorbent, fundamentally altering the physical and chemical parameters of the oxygen-absorbing system to eliminate metal detector response while preserving oxygen-absorbing function
2Reliability
If iron powder oxidation reaction is used, then oxygen absorption occurs, but water is required and only moisture-rich articles benefit
Solution Approach 1:
The patent changes the chemical reaction mechanism from moisture-dependent iron oxidation to moisture-independent organic resin oxidation, allowing the oxygen-absorbing function to operate effectively across a wide range of humidity conditions and for articles with varying moisture content
Solution Approach 2:
The oxygen-absorbing resin composition is designed to function universally across different storage conditions and article types, whether moist or dry, without requiring adjustment of the oxygen-absorbing mechanism, thereby expanding applicability to all packaged goods
3Reliability
If conventional oxygen-absorbing resin composition is used, then oxygen absorption function is provided, but container strength decreases after oxygen absorption
Solution Approach 1:
The patent employs a composite oxygen-absorbing resin composition combining multiple polymer components (polyester resin, polyamide resin, polyolefin resin) with specific functional additives, creating a material system where each component contributes to both oxygen-absorbing function and structural strength maintenance
Solution Approach 2:
The patent optimizes the molecular weight, composition ratios, and chemical structure parameters of the resin components to ensure that the oxygen-absorbing reaction occurs without significant degradation of mechanical properties, maintaining container strength throughout the oxygen-absorption process
4Reliability
If oxygen-absorbing resin composition is used, then oxygen absorption occurs, but odor is produced due to oxidation
Solution Approach 1:
The patent selects specific polymer types and molecular weight ranges that undergo oxidation without producing volatile odor-causing compounds, changing the chemical parameters of the oxygen-absorbing reaction to eliminate harmful byproducts while maintaining oxygen-absorbing efficacy
Solution Approach 2:
The patent converts the oxidation reaction, which typically produces harmful odors, into a beneficial process by selecting resin compositions where oxidation occurs cleanly without generating volatile organic compounds, transforming a potentially harmful chemical reaction into a safe and effective oxygen-absorbing mechanism
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 in various humidity conditions, prevents odor production, and maintains container strength, making it suitable for packaging a wide range of products including food and pharmaceuticals.
Implementation Method 1
an oxygen-absorbing resin composition composed of a polyamide as an oxidizable organic component (in particular, a xylylene group-containing polyamide) and a transition metal catalyst
Implementation Method 2
an oxygen-absorbing resin composition comprising a polyamide compound having a tetralin ring and a transition metal catalyst
Data Source
AI summary
Provided are a novel oxygen-absorbing resin composition not responsive to a metal detector, producing no odor after absorption of oxygen and having excellent oxygen-absorbing performance, and a multilayer body, container, injection-molded article and medical container using these. Further provided are an oxygen-absorbing resin composition etc. having excellent oxygen-absorbing performance in a wide range of humidity conditions from low humidity to high humidity. The oxygen-absorbing resin composition of the present invention is an oxygen-absorbing resin composition containing a polyamide compound and a transition metal catalyst, wherein the polyamide compound has at least one constituent unit having a tetralin ring. Moreover, the multilayer body, container, injection-molded article, medical container, etc. of the present invention are obtained by using the oxygen-absorbing resin composition of the present invention.