Multilayer Packaging with Ionomer Sealing Layer for Odor and Oxygen Control
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Solution Overview
Problem
Existing oxygen scavenger technologies, such as laminate films and oxygen absorbers, face challenges in effectively retaining oxygen absorption and odor suppression, leading to reduced oxygen absorption rates and odor generation issues in food storage applications.
Innovation Solution
A multilayer body comprising a sealing layer, an oxygen absorption layer with iron powder, and an oxygen barrier layer, where the oxygen absorption layer contains an ionomer with iron powder at specific concentrations, effectively suppresses odor and maintains oxygen absorption rates by preventing contact between food and the oxygen absorption layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If water released from food comes into contact with the odor absorption layer before coming into contact with the oxygen absorption layer, then water is absorbed by the odor absorption layer, but the amount of water supplied to the oxygen absorption layer is reduced, resulting in reduced oxygen absorption amount and rate
Solution Approach 1:
The patent introduces a sealing layer as an intermediary component between the food and the odor absorption layer. This sealing layer prevents water from food from reaching the odor absorption layer, thereby ensuring that water is directed to the oxygen absorption layer where it is needed for effective oxygen absorption. The sealing layer acts as a mediator that controls the flow path of water to prevent premature absorption by the odor absorption layer.
Solution Approach 2:
The patent segments the packaging structure into distinct functional layers: a sealing layer, an oxygen absorption layer, and an odor absorption layer. By segmenting these functions into separate layers with specific arrangements, the patent ensures that water from food first contacts the sealing layer and then the oxygen absorption layer, preventing the odor absorption layer from intercepting water before it reaches the oxygen absorption layer. This segmentation allows each layer to perform its intended function without interference.
2Reliability
If food is hermetically closed in a gas barrier container with an oxygen scavenger, then oxygen removal is effective, but the odor is confined within the container, causing foreign smell and deterioration of food taste
Solution Approach 1:
The patent introduces a deodorizing layer as an intermediary component between the oxygen absorption layer and the food. This deodorizing layer actively absorbs odors generated during oxygen scavenging, preventing them from reaching and contaminating the food. The deodorizing layer serves as a mediator that captures harmful odor molecules while allowing the oxygen removal function to proceed effectively in the oxygen absorption layer.
Solution Approach 2:
The patent employs a composite packaging structure combining multiple materials with different functions: an oxygen absorption layer containing iron powder for oxygen removal, a deodorizing layer containing odor-absorbing materials for odor control, and a sealing layer for hermetic closure. This composite structure integrates multiple functional materials to simultaneously achieve effective oxygen removal and odor suppression, preventing the harmful effects of confined odors on food quality.
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 multilayer body achieves excellent oxygen absorption and odor suppression, maintaining food flavor by reducing external oxygen permeation and internal odor generation, enhancing the storage quality of packaged foods.
Implementation Method 1
an oxygen absorption layer (B) which is made of an oxygen absorbent resin composition (b) that contains an oxidizable thermoplastic resin and a transition metal catalyst
Implementation Method 2
at least one of the sealing layer (A) and the oxygen absorption layer (B) comprises an ionomer as the thermoplastic resin
Data Source
Figure 1~2
AI summary
A multilayer body comprising a sealing layer (A) comprising a thermoplastic resin, an oxygen absorption layer (B) comprising a thermoplastic resin and iron powder, and an oxygen barrier layer (D) having oxygen barrier properties, the layers being laminated in a described order, wherein at least one of the sealing layer (A) and the oxygen absorption layer (B) comprises an ionomer as the thermoplastic resin.