Thermal Transfer Sheet Peelability via Resin Adjusting Agent
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Solution Overview
Problem
Thermal transfer sheets face challenges in maintaining satisfactory peelability of the transfer layer across various peeling environments, leading to irregular transfers and tailing issues due to the interaction between the transfer layer and the release layer.
Innovation Solution
A thermal transfer sheet design with a substrate, a release layer containing a thermally cured silicone resin and a peeling-force adjusting agent, and an adhesion layer, where the peeling-force adjusting agent is a hydroxyl group-containing resin with a hydroxyl value between 3 mgKOH/g and 100 mgKOH/g, and the content of the adjusting agent is between 3% and 45% by mass, ensuring a stable peeling force between 4.6 g/cm and 23 g/cm, and an initial breakage peeling force of 47 g/cm or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a release layer is provided between the substrate and transfer layer to improve peelability, then the transfer layer can be peeled off from the substrate, but irregular transfer and tailing occur when peeling in predetermined environments
Solution Approach 1:
The patent applies parameter changes by precisely controlling the peeling force within the range of 4.6 g/cm to 23 g/cm and the initial breakage peeling force within 47 g/cm or less. These parameter specifications ensure that the transfer layer peels off consistently across different peeling environments (30°C to 70°C, 90° peeling angle) without causing irregular transfer or tailing, thus resolving the contradiction between ease of peeling and transfer reliability
Solution Approach 2:
The patent employs composite materials by formulating the release layer with specific combinations of resins and additives that achieve the desired peeling force characteristics. The release layer is designed as a composite structure with controlled composition to provide both sufficient peelability and consistent transfer performance across varying environmental conditions
2Ease of operation
If the peeling force is increased to prevent tailing, then the transfer layer remains on the substrate, but the transfer layer cannot be peeled off in high-temperature environments
Solution Approach 1:
The patent resolves this contradiction by establishing specific parameter ranges for peeling force (4.6-23 g/cm) and initial breakage peeling force (≤47 g/cm). These parameters are optimized to maintain adequate adhesion at high temperatures (preventing tailing) while still allowing successful peeling off in the specified temperature range of 30°C to 70°C at a 90° peeling angle
3Ease of operation
If the peeling force is decreased to facilitate peeling off, then the transfer layer peels off easily, but irregular transfer occurs where the transfer layer does not peel at the normal interface
Solution Approach 1:
The patent addresses this contradiction by precisely defining the peeling force parameters: stable period peeling force of 4.6-23 g/cm and initial breakage peeling force of 47 g/cm or less. These parameter specifications ensure that the transfer layer peels off at the correct interface (between transfer layer and release layer) consistently across different peeling environments, preventing irregular transfer while maintaining ease of peeling
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 ensures consistent and reliable peelability of the transfer layer across a broad peeling environment, preventing irregular transfers and tailing by optimizing the peeling force and adhesion properties.
Implementation Method 1
the peeling force in a stable period is in the range of 4.6 g/cm or more and 23 g/cm or less when the transfer layer is peeled off at a peeling temperature in the range of 30° C. or more and 70° C. or less and at a peeling angle of 90°
Implementation Method 2
a release layer containing a thermally cured silicone resin and a peeling-force adjusting agent
Data Source
AI summary
There is provided a thermal transfer sheet having satisfactory peelability when a transfer layer is peeled off without being affected by a peeling environment when the transfer layer is peeled off.A thermal transfer sheet 100 includes a substrate 1 and a transfer layer 10 provided on one surface of the substrate 1, in which the peeling force in a stable period is in the range of 4.6 g/cm or more and 23 g/cm or less when the transfer layer 10 is peeled off at a peeling temperature in the range of 30° C. or more and 70° C. or less and at a peeling angle of 90° while the surface of the transfer layer 10 on the side opposite to the substrate 1 is made to serve as a peeling interface.