Printing Plate Precursor with Tabular Particle Back Coat
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Solution Overview
Problem
Existing planographic printing plate precursors face issues with scratches and peeling on rear surface layers during lamination without the use of interleaving paper, which increases costs and risks damage to the printing plate precursors.
Innovation Solution
A printing plate precursor laminate is developed with an aluminum support, a polymer layer on the printing surface, and a tabular particle layer on the non-printing surface, where the tabular particles have an aspect ratio of 5 or greater, preventing scratches and peeling by enhancing the hardness of the back coat layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interleaving paper is used between planographic printing plate precursors during lamination, then prevention of dislocation, adhesion, and scratches is improved, but cost increases and disposal treatment is required
Solution Approach 1:
The patent removes the interleaving paper from the lamination structure and replaces it with a protective layer formed directly on the printing plate precursor. This extraction of the separate protective component eliminates the need for additional disposal treatment while maintaining protection functionality.
Solution Approach 2:
The protective function previously provided by a separate interleaving paper is merged into the printing plate precursor itself by forming a protective layer as an integral part of the precursor structure. This consolidation eliminates the need for separate protective materials and simplifies the overall structure.
2Ease of manufacture
If interleaving paper is removed before exposure step, then cost and disposal treatment are reduced, but load on plate-making step increases and peeling failure occurs
Solution Approach 1:
The protective layer is formed in advance on the printing plate precursor before the exposure step, providing continuous protection throughout the entire process. This preliminary formation of protection eliminates the need to remove interleaving paper and prevents peeling failure without adding operational complexity.
3Reliability
If interleaving paper is used during lamination, then surface protection is improved, but the surface may be damaged during removal
Solution Approach 1:
The patent eliminates the interleaving paper that could damage the surface during removal and replaces it with a protective layer that remains as an integral part of the printing plate precursor, ensuring surface protection without the risk of damage from removal operations.
Solution Approach 2:
The printing plate precursor provides its own surface protection through the integrated protective layer, eliminating the need for separate interleaving paper that would require careful removal. The structure protects itself without external assistance, avoiding the harmful effects of paper removal.
4Reliability
If a protective layer is formed on the printing plate precursor, then scratch and peeling prevention is improved, but the layer thickness and particle size must be precisely controlled
Solution Approach 1:
The patent specifies that the average particle diameter of fine particles in the protective layer should be 0.3 μm or greater and greater than the layer thickness, establishing clear parameter relationships that guide manufacturing to achieve the desired protective properties while managing precision requirements.
Data Source
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AI summary
Provided is a printing plate precursor including a support, a layer containing a polymer on a printing surface side on the support, and a layer containing tabular particles on a non-printing surface side opposite to the layer containing a polymer in a state of sandwiching the support therebetween.