Record Image Layer Stress Reduction via Segmented Heating
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Solution Overview
Problem
Conventional record manufacturing methods result in image layers with internal stress, leading to cracks and reduced adhesion to the recording medium due to simultaneous resin softening and solvent removal, which causes internal stress in the image layer.
Innovation Solution
A method involving the application of gas to the image layer during the solvent-removing step, with a temperature range of 60°C to the heating step temperature, and a resin with a glass transition temperature between -30°C to 150°C, along with a protective layer formed using a solvent with a boiling point of 180°C or higher to prevent solvent evaporation and reduce internal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the solvent is removed from the image layer during the heating step, then the image layer is formed, but internal stress is generated causing cracks and reducing adhesion
Solution Approach 1:
The patent divides the manufacturing process into distinct stages: a heating step where the resin is heated to its glass transition temperature to soften it, and a subsequent solvent removal step. This segmentation allows the resin to be softened before solvent removal, preventing internal stress and cracks while maintaining adhesion.
Solution Approach 2:
The patent applies preliminary heating to the image layer before removing the solvent. By heating the resin to its glass transition temperature in advance, the resin becomes soft and flexible, which prevents the formation of internal stress and cracks during the subsequent solvent removal process, thereby maintaining adhesion properties.
2Stability of the object's composition
If the resin glass transition temperature is high, then the resin forms a stable film, but the adhesion to recording medium is reduced
Solution Approach 1:
The patent specifies that the resin should have a glass transition temperature between -30°C and 150°C. This parameter optimization allows the resin to be sufficiently stable to form a durable film while remaining flexible enough to adhere properly to the recording medium. The specific temperature range balances film stability with adhesion properties.
3Productivity
If gas is applied to the image layer during solvent removal, then solvent removal efficiency is improved, but the process complexity increases
Solution Approach 1:
The patent employs gas flow (pneumatic action) to enhance solvent removal from the image layer. By applying gas during the solvent removal step, the evaporation efficiency is improved, allowing for faster and more effective solvent removal without requiring complex additional equipment or processes.
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 method effectively reduces internal stress in the image layer, enhancing adhesion properties and preventing cracks, resulting in records with excellent fastness and durability.
Implementation Method 1
an image layer is heated to a temperature not lower than a glass transition temperature of the resin contained in the ink
Implementation Method 2
an image layer is heated to a temperature not lower than a glass transition temperature of the resin contained in the ink, and a solvent is removed from the image layer
Data Source
AI summary
A method for manufacturing a record includes an image layer-forming step of forming an image layer by applying ink containing resin and a solvent A to a recording medium, a heating step of heating the image layer to a temperature not lower than the glass transition temperature of the resin, and a solvent-removing step of removing the solvent A from the image layer after the heating step.