Ablation Layer Photosensitive Resin Structure Infrared Processing
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Solution Overview
Problem
Existing photosensitive resin structures for flexographic printing face issues such as image blurring due to oxygen inhibition, peeling of the ablation layer, contamination of the developer, and moisture-induced wrinkling, which affect the quality and efficiency of the printing process.
Innovation Solution
An ablation layer for a photosensitive resin structure that includes an anionic polymer with a saponification degree of 0% to 90% and an ester bond in a side chain, capable of being processed by infrared radiation, and designed for improved adhesion and moisture resistance, allowing for easy removal with developers and preventing residue re-adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a barrier layer is added to prevent oxygen inhibition, then adhesion is improved, but manufacturing complexity increases and image quality deteriorates due to loss of oxygen permeability
Solution Approach 1:
The patent removes the barrier layer from the structure entirely. Instead of adding a layer to prevent oxygen inhibition, the invention relies on the photosensitive resin composition itself to provide sufficient adhesion without requiring an additional barrier layer, thereby simplifying the structure while maintaining reliability
Solution Approach 2:
The patent modifies the chemical composition parameters of the photosensitive resin layer by incorporating specific polymers with carboxyl groups and controlling the content of hydrophilic groups. This compositional change enables the resin to achieve adequate adhesion directly, eliminating the need for a separate barrier layer
2Use of energy by moving object
If polyvinyl alcohol is used as ablation layer, then infrared ablation capability is achieved, but moisture absorption causes wrinkling and adhesion problems
Solution Approach 1:
The patent changes the chemical composition parameters by selecting polymers with specific functional groups (carboxyl, hydroxyl, amine) and controlling the content of hydrophilic groups to 1-20 mass%. This parameter optimization provides sufficient infrared absorption capability while limiting moisture absorption to prevent wrinkling and adhesion issues
Solution Approach 2:
The patent uses composite polymer systems combining different polymer components with complementary properties. The combination of polymers with carboxyl groups, hydroxyl groups, and amine groups creates a composite material that balances infrared ablation capability with moisture resistance through synergistic interactions
3Stability of the object's composition
If water-insoluble polyamides are used for ablation layer, then structural stability is improved, but developer contamination and residue accumulation occur
Solution Approach 1:
The patent optimizes the solubility parameters of the ablation layer by selecting polymers with controlled hydrophilicity (1-20 mass% hydrophilic groups). This parameter adjustment ensures the ablation layer has sufficient structural stability while maintaining adequate solubility in developers to prevent contamination and residue accumulation
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
The solution provides a photosensitive resin structure with enhanced adhesion, resistance to moisture-induced wrinkling, and efficient developer removal, resulting in improved image quality and reduced operational complications in the flexographic printing process.
Implementation Method 1
providing a layer that is ablatable by infrared radiation on a photosensitive resin composition layer, and removing the ablation layer that corresponds to a desired image by laser radiation
Implementation Method 2
removing the ablation layer that corresponds to a desired image by laser radiation, thereby forming a portion that transmits active light
Implementation Method 3
the curing mechanism of the photosensitive resin structure for the flexographic printing occurs through radical polymerization
Implementation Method 4
Because radicals produced during polymerization are deactivated by oxygen, curing tends to proceed slowly near the plate surface that is in contact with air
Data Source
AI summary
A photosensitive resin structure having an ablation layer for a photosensitive resin for a relief printing that is capable of being processed by infrared radiation and containing an anionic polymer, a relief printing plate is produced by drawing a pattern by irradiating the ablation layer with infrared radiation; exposing the pattern by irradiating the photosensitive resin layer with ultraviolet radiation; and removing the ablation layer and unexposed photosensitive resin layer with a developer.