Food Packaging Chemical Sensor for Freshness Detection
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Solution Overview
Problem
Existing food packaging does not reliably indicate food freshness or quality without opening the packaging, posing risks to consumers as spoilage is only visible in advanced states.
Innovation Solution
A food packaging arrangement that includes a chemical composition which reacts with breakdown products to form light-emitting or fluorescent compounds, allowing for visual or detector-based assessment of food quality without opening the packaging, using a light-tight design with an exposable window and a buffer to stabilize reactions and prevent premature breakdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the packaging is opened to analyze the food product, then the food quality can be assessed, but the food is exposed to contamination and the packaging is compromised
Solution Approach 1:
A chemical composition acts as an intermediary sensor between the food and the external environment. This composition reacts with breakdown products of spoiled food to produce light emission, allowing quality assessment without direct contact or opening of the packaging, thus maintaining food safety while enabling measurement.
Solution Approach 2:
The patent replaces mechanical opening and visual inspection with a chemical sensing system. The chemical composition detects food spoilage through biochemical reactions that produce light signals, eliminating the need to physically open the packaging and exposing the food to contamination.
2Reliability
If the packaging is made light-tight to prevent environmental effects, then the chemical composition is protected from premature breakdown, but light emission from the reaction cannot be detected
Solution Approach 1:
The packaging is designed with localized light transmission properties. While the majority of the packaging remains light-tight to protect the chemical composition, specific regions contain light sensors or windows that allow detection of the light emission signal from the chemical reaction, maintaining both protection and detectability.
Solution Approach 2:
Light sensors or detection windows act as intermediaries that translate the light emission from the chemical reaction into detectable signals without requiring the entire packaging to be transparent. This allows light detection while maintaining overall light-tightness for composition stability.
3Productivity
If the chemical composition is placed in direct contact with the food, then the reaction with breakdown products is rapid, but the food may cause premature breakdown or contamination of the sensor
Solution Approach 1:
The system is divided into separate compartments: the chemical composition is placed in a distinct sensor region separated from the food by a barrier or intermediate space. This segmentation allows the chemical composition to remain intact and protected from food contamination while still enabling rapid reaction with breakdown products that can diffuse through the barrier.
Solution Approach 2:
The separating barrier between the food and chemical composition is designed with porous or permeable properties that allow breakdown products to diffuse through to the sensor while preventing direct contact between the food matrix and the chemical composition, thus maintaining sensor integrity while enabling rapid detection.
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
Enables rapid, reliable, and safe determination of food freshness and quality through light emission or fluorescence, preventing food spoilage detection until necessary, while being cost-effective and reusable.
Implementation Method 1
The chemical composition (4) is able to react with a breakdown product of the packaged food (3) with formation of a light-emitting or fluorescent compound or with emission of light
Implementation Method 2
The chemical composition (4) is able to react with a breakdown product of the packaged food (3) with formation of a light-emitting or fluorescent compound or with emission of light
Implementation Method 3
The buffer is a buffer in the chemical sense, which serves to stabilize a pH range and also for retaining structure and function, e.g. of proteins
Implementation Method 4
The packaging in this case is advantageously designed in such a manner that it is permeable to the emitted light
Implementation Method 5
the packaging is light-tight
Data Source
AI summary
A food packaging arrangement (1) comprising a packaging (2) and a chemical composition (4) which, by reaction with a breakdown product of the food (3) in question, forms a light-emitting or fluorescent compound or emits light.