Superabsorbent Polymer Composition for Low-Extractive Food Packaging
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Solution Overview
Problem
Existing superabsorbent polymers used in foodstuff packaging face safety concerns due to the migration of low-molecular-weight extractives, which can contaminate food and compromise safety standards, despite their high absorption capacity.
Innovation Solution
Incorporating a gallic acid group-containing polyphenol compound into the polymerization reaction composition enhances the polymerization and stability of carboxyl group-containing monomers, reducing the level of low-molecular-weight extractives to ensure compliance with food safety regulations and maintaining excellent absorption and retention capacities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If superabsorbent polymer is used as absorbent pad or absorber, then absorption capacity is improved, but safety is worsened due to low-molecular-weight extractives migration into foods
Solution Approach 1:
The patent changes the chemical parameters of the polymer by introducing a polyphenol compound with specific molecular structure (containing phenolic hydroxyl groups) to modify the polymer composition. This chemical parameter change reduces the extractability of low-molecular-weight components while preserving the superabsorbent properties, thereby resolving the contradiction between absorption capacity and food safety
Solution Approach 2:
The patent creates a composite material system by combining superabsorbent polymer with polyphenol compound. The polyphenol compound acts as a functional additive that forms a complex structure with the polymer, reducing the migration of harmful extractives while maintaining the absorption capacity. This composite approach allows simultaneous achievement of high absorption and food safety
2Object-affected harmful factors
If multi-layer cellulose is used as water absorbent, then safety is improved, but absorption capacity is worsened due to limited retention and absorption capacity
Solution Approach 1:
The patent combines cellulose-based materials with superabsorbent polymer to create a composite absorbent structure. This composite material leverages the safety advantages of cellulose while incorporating the high absorption capacity of superabsorbent polymer, thereby resolving the contradiction between safety and absorption performance
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 resulting superabsorbent polymer achieves safe foodstuff packaging by minimizing extractable low-molecular-weight contaminants while retaining high absorption and retention capabilities, meeting safety and performance standards.
Implementation Method 1
the superabsorbent polymer is made by polymerization during which the low-molecular-weight extractives are produced easily
Implementation Method 2
enhances the polymerization and stability of carboxyl group-containing monomer in the reaction composition
Implementation Method 3
A superabsorbent polymer can absorb water that is 10 times to 100 times and even 1000 times its original mass
Data Source
AI summary
The present invention is related to a superabsorbent polymer, a method of manufacturing the same, and a foodstuff packaging material including the same. By adding a gallic acid group-containing polyphenol compound into a reaction composition, the level of polymerization and the stability of a carboxyl group-containing monomer in the polymerization can be increased, thereby decreasing amounts of low-molecular-weight extractives in the obtained superabsorbent polymer. The superabsorbent polymer not only can be safe and have an antibacterial property but also maintain excellent retention capacity and absorption capacity, and can be used as the foodstuff packaging material.