Temperature Indicating Label Using Shape Memory Polymer
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Solution Overview
Problem
Current methods for real-time temperature monitoring in sensitive industries like biomedicine and food are economically and technologically impractical, making it difficult to detect if products have exceeded temperature limits, which can lead to deterioration and safety issues.
Innovation Solution
A temperature indicating method using thermal induced shape memory polymers, where labels are predeformed and then placed in environments to indicate if temperatures have reached or exceeded set limits by observing spontaneous shape recovery, allowing for low-cost, easy-to-use, and miniaturized temperature monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic devices or mechanical devices are used for temperature monitoring, then temperature monitoring capability is achieved, but cost and device complexity increase significantly
Solution Approach 1:
The patent extracts the temperature sensing function from complex electronic or mechanical devices and embeds it directly into the polymer material itself. The shape memory polymer undergoes spontaneous shape recovery when exposed to temperatures above a threshold, providing temperature indication through its own morphological change without requiring external sensors, circuits, or mechanical components.
Solution Approach 2:
The shape memory polymer serves itself by using its intrinsic thermal response to indicate temperature conditions. The polymer's ability to spontaneously recover its original shape when heated above the glass transition or melting transition temperature eliminates the need for external power sources, control systems, or reading devices, making the system self-contained and extremely simple.
2Reliability
If real-time temperature monitoring is implemented for each product, then temperature control reliability is improved, but economic feasibility deteriorates
Solution Approach 1:
The patent employs inexpensive shape memory polymer materials that can be easily manufactured and disposed of after use. These simple polymer labels or tags are far cheaper than electronic temperature monitoring devices, making it economically feasible to provide temperature indication for every individual product without requiring complex or expensive monitoring systems.
Solution Approach 2:
The patent utilizes visible morphological changes in the polymer material (such as shape recovery, color change, or surface deformation) to indicate temperature conditions. These visual changes provide clear temperature indication without requiring electronic displays, sensors, or complex measurement systems, significantly reducing manufacturing costs while maintaining reliability.
3Measurement precision
If complex electronic or mechanical temperature monitoring systems are used, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent employs visible morphological changes in the polymer material (such as shape recovery, color change, or surface deformation) to indicate temperature conditions. These visual changes provide clear temperature indication without requiring electronic displays, sensors, or complex measurement systems, significantly reducing manufacturing costs while maintaining reliability.
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
This method provides accurate, low-cost, and practical temperature indication for both batch and individual products, enabling effective monitoring of temperature limits without complex circuits or mechanical devices, with residual deformation and shape recovery ratios indicating temperature exceedance.
Implementation Method 1
A temperature indicating method by using thermal induced shape memory polymer is provided, which has the function to display whether the highest temperature experienced has once been above the limit and the exceeding degrees
Implementation Method 2
heating temperature indicating label to make it achieve or exceed the initial temperature of glass transition or melting transition
Implementation Method 3
heating temperature indicating label to make it achieve or exceed the initial temperature of glass transition or melting transition
Data Source
AI summary
A temperature indicating method, a temperature indicating label used by this method, and a method for manufacturing the temperature indicating label, includes: a, determining the target temperature, adopting the thermal induced shape memory polymer material to manufacture the temperature indicating label; b, heating the temperature indicating label to make it achieve or exceed the initial temperature of glass transition or melting transition but be lower than the terminal temperature of glass transition or melting transition, then finishing the predeformation treatment; and c, placing the predeformed temperature indicating label into the environment which needs temperature indication for a while, observing whether spontaneous shape recovery happens to the label and judging whether the environment temperature has once reached or exceeded the target temperature.