Inkjet Adhesion Layer Control for High-Definition Transfer Printing
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Solution Overview
Problem
The existing transfer printing methods face challenges in achieving high-definition images due to unstable contact between the transfer layer and adhesion layer, particularly at the peripheral portions, which leads to difficulties in accurately reproducing patterns and requires reduced inkjet droplet amounts, limiting printing speed.
Innovation Solution
A printing method that switches the adhesive jetting amount and interval between stages, applying smaller amounts and closer intervals at the peripheral portions, allowing for high-speed printing with large droplets on main regions and small droplets on peripheries, and using multiple batches with decreasing jetting amounts to stabilize the adhesion layer interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adhesive is inkjetted with relatively large droplets to increase printing speed, then productivity is improved, but manufacturing precision deteriorates due to gradual interface incline causing unstable contact at peripheral portions
Solution Approach 1:
The patent applies different jetting amounts to different regions of the adhesion layer. Specifically, the peripheral portion (boundary region) receives a smaller jetting amount compared to the central portion. This local differentiation creates a favorable interface incline at the boundaries, ensuring stable contact between transfer layer and adhesion layer, thereby achieving high-definition transfer images while maintaining overall printing efficiency
Solution Approach 2:
The patent divides the adhesion layer formation process into multiple jetting stages with different parameters. The first jetting forms the base adhesion layer, and subsequent jettings refine the peripheral portions with smaller droplets. This segmentation allows the system to achieve both high-speed printing in central regions and high-precision pattern reproduction at boundaries
2Manufacturing precision
If adhesive is inkjetted with relatively small droplets to improve pattern accuracy, then manufacturing precision is improved, but productivity deteriorates due to reduced printing speed
Solution Approach 1:
The patent applies small jetting amounts only to peripheral portions where high precision is critical for pattern reproduction, while allowing larger jetting amounts in central regions where speed is more important. This localized precision approach maintains overall printing speed while ensuring accurate pattern reproduction at boundaries
Solution Approach 2:
The patent employs multiple sequential jetting operations with decreasing jetting amounts. The first jetting uses larger droplets for rapid adhesion layer formation, followed by subsequent jettings with smaller droplets to refine the peripheral portions. This periodic action with varying parameters achieves both speed and precision
3Device complexity
If uniform jetting amount is used across the entire adhesion layer, then device complexity is reduced, but manufacturing precision deteriorates due to unstable contact at peripheral portions
Solution Approach 1:
The patent implements region-dependent jetting control where the jetting amount varies based on the position within the adhesion layer. The control unit identifies peripheral portions and applies smaller jetting amounts specifically to these regions, creating the necessary interface geometry for stable contact and high-definition transfer without requiring complex hardware modifications
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 enables the formation of a high-definition transfer image at increased speed by stabilizing the adhesion layer interface and preventing deformation, allowing for precise pattern reproduction and high-speed printing.
Implementation Method 1
adhesive is inkjetted, in a pattern intended to be transferred, onto a transfer layer of a transfer material
Implementation Method 2
the transfer layer and the adhesion layer are pressed against each other, thus transfer printing a transfer layer of the transfer material on the transferring medium
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A printing method according to the invention includes forming an adhesion layer (7) using a printing whereby adhesive is ink-jetted, in a pattern intended to be transferred, onto a transfer layer (6) of a transfer material (3) in which the transfer layer (6) is provided on a base material (4), or onto a transferring medium (2); stacking and pressing so that the adhesion layer (7) is sandwiched by the transfer material (3) and transferring medium (2); and transferring the transfer layer (6) to the transferring medium (2) in the pattern intended to be transferred, wherein when forming the adhesion layer (7), the jetting amount of the adhesive is switched between at least two or more stages.