Printing Plate Precursor Outermost Layer Anti-Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing planographic printing plate precursors face issues with multiple-plate feeding, convex portion falling, scratches, and development delays when interleaving paper is eliminated, with previous techniques failing to provide comprehensive solutions for these problems.
Innovation Solution
A printing plate precursor with a polymer layer on the printing surface side and a particle layer on the opposite side, where the particles have a modulus of elasticity of 0.1 GPa or more, and specific Bekk smoothness and thickness conditions are met to prevent multiple-plate feeding, convex portion falling, and development delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interleaving paper is used to prevent adhesion and scratches, then protection during lamination is improved, but cost increases and disposal treatment is required
Solution Approach 1:
The patent introduces a specific outermost layer structure with controlled surface energy and roughness as an intermediary between the printing plate precursor and the laminate environment. This layer acts as a protective interface that prevents adhesion and scratches during handling without requiring separate interleaving paper, thereby eliminating disposal treatment costs while maintaining protection reliability
Solution Approach 2:
The invention replaces the disposable interleaving paper with a permanent, integrated outermost layer that is part of the printing plate precursor structure. This layer provides ongoing protection throughout the plate's lifecycle without needing to be removed or replaced, reducing both material costs and disposal requirements
2Ease of manufacture
If interleaving paper is removed to reduce cost, then cost and disposal treatment are improved, but multiple-plate feeding and adhesion problems occur
Solution Approach 1:
The patent modifies the surface energy and roughness parameters of the outermost layer to achieve optimal balance. By controlling surface energy to be 20-50 mN/m and surface roughness Ra to be 0.03-0.50 μm, the layer provides sufficient protection during lamination while preventing excessive adhesion that would cause multiple-plate feeding problems, thus maintaining reliability without interleaving paper
3Reliability
If outermost layer surface is made rough to prevent multiple-plate feeding, then multiple-plate feeding is prevented, but convex portions may fall off and cause scratches
Solution Approach 1:
The patent optimizes the surface roughness parameter Ra to a specific range of 0.03-0.50 μm, which provides sufficient surface irregularity to prevent multiple-plate feeding while maintaining the structural integrity of convex portions. This controlled roughness prevents both adhesion issues and convex portion detachment, eliminating scratches without requiring interleving paper
4Object-affected harmful factors
If protective layer thickness is increased to prevent scratches, then scratch resistance is improved, but Bekk smoothness decreases and development delays occur
Solution Approach 1:
The patent optimizes the protective layer thickness to 0.01-2.0 μm and controls the Bekk smoothness to 500-2000 seconds, achieving a balance where the layer is thick enough to provide scratch resistance during handling but thin enough to allow proper development. The controlled surface roughness and thickness ensure that development solutions can penetrate effectively without excessive delay while maintaining scratch protection
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention provides a printing plate precursor including a layer which includes a polymer and is provided on a printing surface side of an aluminum support, and a layer which includes particles and is provided on a side opposite to the printing surface side, in which a modulus of elasticity of the particles is 0.1 GPa or more, and in a case where a Bekk smoothness of an outermost layer surface on the side opposite to the printing surface side is denoted by b second, a specific expression (1) is satisfied; a printing plate precursor laminate; a method for making a printing plate; and a printing method.