Laminated Body Inkjet Printing Multilayer Curing
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Solution Overview
Problem
Inkjet printing methods face challenges in achieving high productivity and image quality due to the trade-off between coating film consistency and adhesiveness, often requiring additional processes that decrease productivity and are not suitable for small apparatuses.
Innovation Solution
A method involving a first and second curable liquid composition, where the second liquid droplet layer is formed inside or at the lower part of the first liquid layer, allowing for high productivity and image quality by maintaining adhesiveness and consistency without disturbing the laminated state, using an inkjet printing apparatus with a UV light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If additional coating or laminating processes are applied to improve coating film consistency and adhesiveness, then image quality is improved, but productivity decreases
Solution Approach 1:
The patent combines multiple functional layers (adhesion layer, coating film consistency layer, and color layer) into a single inkjet printing step, discharging different curable liquid compositions simultaneously to form a multilayer structure without requiring separate coating or laminating processes, thereby maintaining high productivity while achieving both coating film consistency and adhesiveness
Solution Approach 2:
The patent segments the inkjet printing process to discharge different curable liquid compositions with specific functions (adhesion, coating consistency, color) at the same time, allowing each layer to perform its designated function while forming a integrated multilayer structure in one step
2Productivity
If multiple layers are discharged at one time through inkjet printing to improve productivity, then production rate is improved, but layer formation precision and image sharpness decrease
Solution Approach 1:
The patent applies local quality by assigning specific functions to different curable liquid compositions discharged at the same time - an adhesion-promoting composition, a coating film consistency composition, and a color layer composition - allowing each to perform its specific function while maintaining overall layer formation precision and image sharpness through simultaneous discharge
3Productivity
If a large apparatus with multiple connected steps is used to maintain productivity, then production rate is maintained, but the apparatus cannot be applied to small inkjet apparatuses
Solution Approach 1:
The patent makes the inkjet printing apparatus universal by enabling it to discharge multiple curable liquid compositions with different functions (adhesion, coating consistency, color) simultaneously in one step, allowing small inkjet apparatuses to achieve the same productivity and quality results that previously required large multi-step systems
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 method enables the production of laminated bodies with high consistency and adhesiveness, maintaining image sharpness and precision over time, while allowing for high productivity and application on small inkjet apparatuses without the need for intermediate curing steps.
Implementation Method 1
irradiating the liquid A and the liquid B with active energy rays for curing, to form a film on which periodic patterns are formed
Data Source
AI summary
A method for producing a laminated body including a first curable liquid composition and a second curable liquid composition, the method including: forming a first liquid layer formed of the first curable liquid composition; impacting the second curable liquid composition onto the first liquid layer, to form a second liquid droplet layer formed of the second curable liquid composition inside the first liquid layer or at a lower part of the first liquid layer in a direction in which second liquid droplets for the second liquid droplet layer are impacted onto the first liquid layer; and curing the first liquid layer and the second liquid droplet layer.