Thermal Transfer Sheet Fusible Layer Peel-Off Control
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Solution Overview
Problem
Existing thermal transfer methods face challenges in accurately removing a specific region of the transfer layer from a transfer receiving article, often resulting in reverse transfer of the peel-off layer or incomplete removal of the transfer layer, especially when using thermal transfer sheets with low adhesiveness and high-energy applications.
Innovation Solution
A method involving a thermal transfer sheet with a fusible layer and a peel-off layer, where the fusible layer is transferred onto the removal region of the transfer layer, enhancing adhesiveness and allowing the peel-off layer to accurately remove the transfer layer, which is then transferred onto the receiving article.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the peel-off layer is used to remove the transfer layer without a fusible layer, then the process is simple, but the peel-off layer transfers to the intermediate transfer medium or the transfer layer remains on the intermediate transfer medium
Solution Approach 1:
The fusible layer acts as an intermediary substance between the peel-off layer and the transfer layer. It is transferred onto the intermediate transfer medium first, then the peel-off layer removes the transfer layer by interacting with this fusible layer, preventing direct contact and reverse transfer between the peel-off layer and intermediate transfer medium
Solution Approach 2:
The fusible layer is transferred onto the intermediate transfer medium in advance before the actual removal of the transfer layer. This preliminary transfer creates a controlled interface that enables accurate removal while preventing harmful reverse transfer
2Reliability
If the adhesiveness between the substrate and peel-off layer is improved, then the peel-off property is enhanced, but the peel-off layer may transfer to the intermediate transfer medium
Solution Approach 1:
The fusible layer serves as a mediator that separates the peel-off layer from the intermediate transfer medium. This allows the peel-off layer to have high adhesiveness to the transfer layer through the fusible layer without directly adhering to the intermediate transfer medium, thus preventing reverse transfer
Solution Approach 2:
The thermal transfer sheet is designed with different adhesive properties in different regions: the fusible layer provides controlled adhesion to the transfer layer while the peel-off layer maintains selective adhesion, creating local quality variations that enable precise removal without reverse transfer
3Strength
If high energy is applied to remove thick transfer layers, then the removal capability is improved, but the peel-off property deteriorates and reverse transfer occurs
Solution Approach 1:
The fusible layer acts as a buffer that absorbs and distributes the high energy applied during removal. It protects the peel-off layer from direct exposure to excessive energy, maintaining the peel-off property while enabling removal of thick transfer layers
Solution Approach 2:
The fusible layer is transferred onto the intermediate transfer medium in advance, creating a protective cushion that prevents direct high-energy interaction between the peel-off layer and the intermediate transfer medium, thereby preserving peel-off properties during high-energy removal
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 approach ensures accurate removal and transfer of the transfer layer, improving the peel-off property and enabling precise placement of the transfer layer on the receiving article, even with high-energy applications and thick transfer layers.
Implementation Method 1
transferring the fusible layer onto at least a portion on the removal region of the transfer layer
Implementation Method 2
removing the removal region of the transfer layer by means of the peel-off layer
Data Source
Figure 1~4
Figure 5(a)~5(b)
Figure 6(a)~6(c)
AI summary
There are provided a method for forming a print obtained by transferring a transfer layer from which a removal region has been accurately removed onto a transfer receiving article and a method for peeling off a transfer layer by which a removal region of the transfer layer can be accurately removed. The method for forming a print comprises, by using a transfer film in which a transfer layer is provided on one surface of a support, a thermal transfer sheet in which a peel-off layer is provided on one surface of a substrate, and a transfer receiving article, a step of removing a removal region of the transfer layer of the transfer film by means of the peel-off layer of the thermal transfer sheet and a step of transferring the transfer layer from which the removal region has been removed onto the transfer receiving article. A print is obtained by preparing a transfer film 10 in which a transfer layer 5 is provided on one surface of a support 1 and (i) a thermal transfer sheet 100 in which a fusible layer 52 and a peel-off layer 51 are provided on the same surface of a substrate 50, or (ii) a first thermal transfer sheet 100A in which a fusible layer 52 is provided on one surface of a first substrate 50A and a second thermal transfer sheet 100B in which a peel-off layer 51 is provided on one surface of a second substrate 50B, transferring the fusible layer 52 onto at least a portion of the removal region of transfer layer 5, then, removing the removal region of the transfer layer 5 by means of the peel-off layer, and subsequently, transferring the transfer layer 5 from which the removal region has been removed onto a transfer receiving article 300.