Nitrite-Modified Meat Packaging for Color Stability
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Solution Overview
Problem
Current meat packaging technologies fail to maintain a desirable red color of meat for an extended period, leading to reduced consumer acceptance and increased shelf life challenges, as existing methods either result in an unacceptable purple color or an unnatural bright red color due to the use of carbon monoxide.
Innovation Solution
Development of food packaging articles with an oxygen barrier layer and a food contact layer comprising a myoglobin blooming agent and synergist, such as nitric oxide donating compounds and acidulants, which promote and preserve a desirable red color in meat products by controlling oxygen exposure and metabolism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional plastic film packaging permeable to oxygen is used, then the meat color blooms to bright red quickly, but the shelf life of the red color is only about three days
Solution Approach 1:
The patent introduces nitrite as an intermediary substance that mediates between oxygen and myoglobin. Nitrite converts to nitric oxide which then binds to myoglobin to form nitrosomyoglobin, providing a stable red color. This intermediary mechanism allows the color to be maintained without direct oxygen exposure, extending shelf life while maintaining acceptable color appearance.
Solution Approach 2:
The patent changes the chemical parameters of the packaging environment by introducing nitrite and controlling its conversion to nitric oxide. This parameter change transforms the color maintenance mechanism from oxygen-dependent (unstable) to nitric oxide-dependent (stable), extending the duration of acceptable color from 3 days to significantly longer periods.
2Duration of action of moving object
If vacuum sealed packaging is used, then the shelf life is extended and meat remains nutritious, but the meat develops an undesirable purple color that does not bloom to red
Solution Approach 1:
The patent applies nitrite to the meat surface or incorporates it into the packaging before sealing. This preliminary action ensures that nitric oxide is present and can bind to myoglobin to form the desired red color before the package is sealed and oxygen is removed. The color development occurs in advance, preventing the purple coloration that would otherwise occur in vacuum packaging.
Solution Approach 2:
Nitrite serves as an intermediary that converts to nitric oxide, which then acts as the actual color-fixing agent. This intermediary mechanism allows color development to occur under controlled conditions before vacuum sealing, ensuring the meat displays acceptable red color rather than purple, while still benefiting from extended shelf life through vacuum packaging.
3Duration of action of moving object
If carbon monoxide is used in modified atmosphere packaging, then a stable red color is maintained, but the color is perceived as unnaturally bright red and causes permanent pinking of the interior
Solution Approach 1:
The patent uses nitrite, a food-grade substance with established safety and acceptability, as an alternative to carbon monoxide. Nitrite converts to nitric oxide which forms nitrosomyoglobin - a stable red color that is naturally acceptable to consumers. This disposable, safe chemical approach replaces the harmful carbon monoxide while achieving similar color stability without the unnatural appearance or interior pinking effects.
Solution Approach 2:
The patent changes the chemical parameter from carbon monoxide to nitrite/nitric oxide. This parameter substitution maintains the color stability benefit (nitrosomyoglobin is stable) while eliminating the harmful effects (nitrite is food-safe and produces natural-looking red color without unnatural brightness or interior pinking).
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 effectively maintains a fresh, appealing red color of meat for a longer duration, enhancing consumer acceptance and shelf life while avoiding the drawbacks of existing methods, such as the use of carbon monoxide, by utilizing a controlled oxygen environment and specific chemical interactions.
Implementation Method 1
The myoglobin blooming agent is selected from the group consisting of nitric oxide donating compounds, nitrogen heterocycles, and sulfur monoxide donating compounds
Implementation Method 2
Nitric oxide (NO) has been described as forming a stable pink color in cured meat
Implementation Method 3
The packaging article having an interior surface and an exterior surface, comprises an oxygen barrier layer
Implementation Method 4
The synergist is selected from the group consisting of acidulants, basifying agents, reducing agents, and postmortem muscle metabolism modifiers
Data Source
AI summary
Food packaging articles, food packaging webs, and food packaging methods comprising a myoglobin blooming agent and synergist that promote or preserve the desirable appearance of food products are provided. The food contact layer of the packaging webs may comprise a myoglobin blooming agent and a synergist.