Planographic Printing Plate Precursor Anti-Stacking Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing planographic printing plate precursors face challenges in preventing multiple plates from being fed in a stack, scratches, and development delays when interleaving paper is not used, as previous techniques either degrade scratch resistance or development delay prevention.
Innovation Solution
A planographic printing plate precursor with an aluminum support and an image recording layer and protective layer configuration, where the protective layer is 0.2 µm or greater in thickness, and the Bekk smoothness of the outermost layer is within specific ranges to prevent plate feeding, scratches, and development delays without interleaving paper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If interleaving paper is removed to reduce cost and improve efficiency, then productivity and cost are improved, but the risk of plate feeding errors, scratches, and development delays increases
Solution Approach 1:
The back surface of the printing plate precursor is designed with self-service functionality to prevent plate feeding errors and ensure stable handling during stacking and transportation without requiring interleaving paper. The specific structural features on the back surface enable the plate to maintain its position and protect itself from damage during automated handling processes.
2Object-affected harmful factors
If the outermost layer surface is made smooth to prevent scratches, then scratch resistance is improved, but multiple plates may be fed simultaneously due to lack of friction
Solution Approach 1:
The outermost layer is designed with local quality differentiation where the image recording surface maintains high smoothness for scratch prevention and image quality, while the back surface incorporates specific structural features that provide appropriate friction for plate feeding control. This localized functional differentiation resolves the contradiction between smoothness and friction control.
3Object-affected harmful factors
If the protective layer is made thicker to prevent scratches, then scratch resistance is improved, but development delay occurs due to increased distance for chemical processing
Solution Approach 1:
The protective layer is constructed as a composite structure with specific thickness (0.5-5 µm) and composition that balances scratch resistance and development speed. The layer incorporates materials and structures that provide mechanical protection while maintaining chemical permeability, allowing development solutions to penetrate efficiently despite the protective function.
4Reliability
If the Bekk smoothness is increased to prevent plate feeding, then plate handling stability is improved, but scratches may occur due to increased surface contact
Solution Approach 1:
The solution moves the functional features from the traditional two-dimensional surface to three-dimensional structural elements on the back surface. By creating protrusions or specific geometric features that extend into the third dimension, the invention provides plate stacking stability through mechanical interlocking rather than relying solely on surface smoothness, thereby avoiding scratch risks.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided are a planographic printing plate precursor including an aluminum support, and an image recording layer and a protective layer which are provided on the aluminum support in this order, in which a thickness of the protective layer is 0.2 µm or greater, and Expression (1) is satisfied in a case where a Bekk smoothness of a surface of an outermost layer on a side opposite to a side where the image recording layer is provided is denoted by b seconds; a planographic printing plate precursor laminate; a plate-making method for a planographic printing plate; and a planographic printing method.