Moisture Measurement Apparatus with O-ring Cooling for Polyimide Imidization
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Solution Overview
Problem
Current methods for measuring the moisture content and imidization rate of solid samples, particularly polyimide films, face challenges such as inaccurate results, deformation of sealants at high temperatures, and difficulties in treating solid samples, leading to inconsistencies in imidization rate calculations.
Innovation Solution
An apparatus combining a solid sample curing unit and Karl-Fischer equipment that heats and cools the sample, using a three-way valve and O-ring cooling unit to manage moisture evaporation and prevent sealant deformation, allowing for accurate measurement and calculation of imidization rates regardless of sample size or curing degree.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the solid sample is heated to high temperature to measure moisture content and imidization rate, then the measurement accuracy is improved, but the sealant shape is deformed and temperature control is lost
Solution Approach 1:
The system is divided into two independent temperature control zones: a furnace unit for heating the solid sample to high temperatures, and a separate cooling unit for maintaining low temperatures at the sealant location. This segmentation allows each component to operate at its optimal temperature without interfering with the other, resolving the contradiction between high-temperature measurement requirements and sealant stability.
Solution Approach 2:
A cooling unit is introduced as an intermediary component between the furnace and the sealant. This cooling unit acts as a thermal buffer that protects the sealant from high temperatures while allowing the furnace to reach the necessary high temperatures for accurate moisture content and imidization rate measurements.
2Productivity
If the solid sample is heated to high temperature for imidization rate measurement, then the imidization reaction is enhanced, but the sealant degrades and loses sealing function
Solution Approach 1:
The heating system is segmented into a furnace unit that can independently heat the solid sample to high temperatures to accelerate the imidization reaction, while the sealant remains in a separate thermal zone maintained at low temperatures by the cooling unit. This allows high productivity in the reaction zone without compromising sealant reliability.
Solution Approach 2:
Different thermal conditions are applied to different parts of the system: the solid sample receives high temperature treatment to enhance imidization reaction rate, while the sealant is maintained at low temperature to preserve its sealing properties. This local differentiation of thermal quality resolves the contradiction between reaction rate enhancement and sealant reliability.
3Device complexity
If the existing measurement method is used, then the equipment is simple, but the moisture content measurement is inaccurate due to sealant deformation
Solution Approach 1:
The measurement system is segmented into a furnace unit for controlled high-temperature heating and a separate cooling unit for sealant protection. This segmentation enables accurate moisture content and imidization rate measurements by maintaining stable thermal conditions, justifying the increased device complexity through significant improvements in measurement precision.
Solution Approach 2:
The system changes the temperature parameter dynamically: the furnace temperature is increased to accelerate the imidization reaction and enable accurate measurements, while the cooling unit simultaneously maintains the sealant at low temperatures. This parameter differentiation allows precise measurements without the sealant deformation that would otherwise occur.
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 precise measurement of moisture content and imidization rates, preventing sealant deformation at high temperatures and allowing for absolute imidization rate calculations, even when the curing degree is not 100%, with no limitations on sample size.
Implementation Method 1
heats and cools the sample, using a three-way valve and O-ring cooling unit to manage moisture evaporation
Implementation Method 2
prevent an O-ring unit from being degenerated at the high temperature by separately forming a cooling unit that cools only the O-ring unit
Implementation Method 3
a Karl-Fischer unit measuring a detected moisture content of the solid sample
Data Source
AI summary
The present invention relates to an apparatus for measuring moisture of a solid sample, a method for measuring a moisture content of the solid sample, and a method for analyzing an imidization rate, and more particularly, to an apparatus for measuring moisture of a solid sample, a method for measuring a moisture content of the solid sample, and a method for analyzing an imidization rate, which detect the moisture content of the solid sample at a specific temperature by using a Karl-Fischer device capable of selectively detecting only the moisture content of the solid sample in the method for analyzing an imidization rate of the solid sample and calculate the imidization rate of the solid sample by using the detected moisture content.