Flexographic Printing Curing During Transfer to Prevent Slippage
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Solution Overview
Problem
Flexographic printing faces significant challenges with dot gain due to slippage between printing features and the substrate, particularly for small features, where relative slippage is more pronounced, leading to reduced printing fidelity.
Innovation Solution
The method involves transferring a curable material from a flexographic printing plate to a recipient substrate while curing it with energy sources like e-beam radiation, UV radiation, or heat, and reducing oxygen content in the environment, which prevents slippage and facilitates precise deposition of the material, especially for features with lateral dimensions of 15 micrometers or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional flexographic printing is used without curing during transfer, then the printing process is simple, but dot gain occurs due to slippage between printing features and substrate, reducing printing fidelity
Solution Approach 1:
The curable material is applied to the printing plate features before the actual printing transfer. This preliminary application allows the material to be positioned precisely on the features, and then cured in place before transfer, preventing slippage and dot gain during the subsequent transfer to substrate
Solution Approach 2:
The invention replaces the traditional mechanical transfer process with a curing-based approach. Instead of relying solely on mechanical contact and pressure to transfer material, the system uses UV or other energy sources to cure the material in place on the printing plate, then transfers the cured or partially cured material to the substrate, eliminating slippage
2Measurement precision
If small printing features (15 micrometers or less) are used, then higher resolution printing is achieved, but slippage becomes more pronounced relative to feature size, worsening printing quality
Solution Approach 1:
For small features, the curable material is applied and cured on the printing plate features before transfer. This preliminary curing anchors the material precisely to the small features, preventing any relative slippage that would be particularly damaging to the fidelity of small, high-resolution features
Solution Approach 2:
The invention changes the physical state of the material through curing (from liquid/soft to solid/rigid) while on the printing plate. This parameter change prevents deformation and slippage of small features during transfer, maintaining the integrity of high-resolution printing
3Manufacturing precision
If curable material is cured while in contact with both printing plate feature and substrate, then slippage is prevented and printing fidelity improves, but the printing process complexity increases
Solution Approach 1:
The printing plate features serve as an intermediary medium where the curable material is first applied and cured. This intermediary step allows precise positioning and curing before final transfer to substrate, with the printing plate acting as the medium that enables both high precision and manageable process complexity
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 enhances printing fidelity by preventing slippage and allowing for the precise transfer of materials with smaller features, improving the overall quality of flexographic printing, especially for small-scale features.
Implementation Method 1
curing the material while the material is in contact with both the feature and the recipient substrate. The curing may comprise exposing the material to energy, such as e-beam radiation, UV radiation
Implementation Method 2
curing the material while the material is in contact with both the feature and the recipient substrate. The curing may comprise exposing the material to energy, such as e-beam radiation, UV radiation
Implementation Method 3
curing the material while the material is in contact with both the feature and the recipient substrate. The curing may comprise exposing the material to energy, such as e-beam radiation, UV radiation, or heat
Implementation Method 4
reducing the oxygen content in the environment of the curing material, e.g., by introducing nitrogen into the curing environment
Data Source
AI summary
Methods and systems for flexographic printing are described and include curing of material to be printed while the material is in contact with both a feature of a flexographic printing plate and a recipient substrate. The systems and method are useful in preventing slippage between the feature and the recipient substrate, and are particularly useful when printing at high resolution.