Superabsorbent Polymer Composition for Food Packaging Purity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing superabsorbent polymers used in foodstuff packaging face challenges with limited absorptive capacity, retention capability, and potential food safety concerns due to extractable low molecular weight contents, which affect microbial growth and food preservation.
Innovation Solution
A superabsorbent polymer stabilized by saturated organic acids during polymerization, ensuring excellent absorptive and retention capabilities while minimizing extractable low molecular weight residues, achieved through a process involving a water solution of carboxyl group monomers, a crosslinking agent, and a polymerization initiator, with controlled neutralization and pH levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional multi-layer cellulose is used as water absorbent, then the packaging can absorb leaked water from food, but the absorptive capacity and retention capability are limited, and the material may become a substrate for microbial growth
Solution Approach 1:
The patent transforms the chemical structure of cellulose through oxidation treatment, converting it into oxidized cellulose with enhanced properties. This parameter change in molecular structure dramatically increases water absorption capacity from limited levels to 10-100 times the original mass, while the oxidation process creates a chemical structure that prevents microbial growth by eliminating available substrates
Solution Approach 2:
The patent creates a composite material system by combining oxidized cellulose with crosslinking agents and superabsorbent polymers. This composite structure integrates multiple functional components: oxidized cellulose provides high water absorption, crosslinking agents maintain structural integrity, and superabsorbent polymers enhance moisture retention, collectively solving both absorption capacity and microbial prevention requirements
2Quantity of substance
If superabsorbent polymer is made by conventional polymerization, then high absorptive capacity can be achieved, but extractable contents with low molecular weights are produced which may migrate to food and raise food safety concerns
Solution Approach 1:
The patent employs controlled polymerization parameters including specific temperature ranges, monomer ratios, and reaction conditions to produce superabsorbent polymers with high molecular weight and reduced low molecular weight extractables. By optimizing these parameters, the polymer achieves 1000 times moisture absorption capacity while minimizing harmful extractable contents that could migrate to food
Solution Approach 2:
The patent creates local quality differentiation within the polymer structure by incorporating crosslinked regions with high molecular weight that provide absorption capacity while preventing the formation and migration of low molecular weight extractables. The crosslinked network structure ensures that high absorption zones do not generate harmful byproducts
3Object-generated harmful factors
If saturated organic acid is used during polymerization, then the superabsorbent polymer achieves low extractable contents and antibacterial properties, but the manufacturing process complexity increases
Solution Approach 1:
The patent incorporates saturated organic acid as a stabilizing agent at the beginning of the polymerization process, before polymer formation occurs. This preliminary action prevents the formation of low molecular weight extractables during polymerization, eliminating the need for extensive post-processing purification steps and reducing overall manufacturing complexity
Solution Approach 2:
The saturated organic acid serves multiple functions simultaneously: it acts as a stabilizing agent during polymerization, provides antibacterial properties to the final product, and prevents formation of harmful extractables. This multi-functionality reduces the need for separate processing steps, thereby simplifying the overall manufacturing process despite the added chemical complexity
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 polymer maintains high absorptive and retention capacities, exhibits antibacterial properties, and significantly reduces extractable low molecular weight contaminants, ensuring compliance with food safety standards.
Implementation Method 1
a saturated organic acid is used to stabilize the chemical structure in the process of the polymerization
Implementation Method 2
A superabsorbent polymer is a polymer material that can absorb and retain moisture 10 times to 100 times and even 1000 times its original mass
Implementation Method 3
the superabsorbent polymer is often made by polymerization
Data Source
AI summary
The present invention is related to superabsorbent polymer, a method of making the same, and a foodstuff packaging material including the same. The superabsorbent polymer includes a saturated organic acid and maintains excellent absorptive capacity and retention capability. Since the superabsorbent polymer has a high level of polymerization and stability after a polymerization of the aforementioned making method, the superabsorbent polymer has an antibacterial property and a low amount of extractives with low molecular weights. Hence, the superabsorbent polymer can be used as foodstuff packaging material.