Resin Laminate Adhesion via Electrostatic Polymer Bonding
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Solution Overview
Problem
In relief printing plates, the adhesive strength between the support and the image-forming resin layer can weaken during storage, leading to peeling issues during platemaking or printing, especially when reactive compounds are used as intermediate layers.
Innovation Solution
A resin laminate structure is introduced, comprising a cationic polymer in the image-forming resin layer and an anionic polymer in the intermediate layer, which enhances adhesion through electrostatic attraction, preventing peeling between the support and the image-forming resin layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a reactive compound is used as an intermediate layer to enhance adhesion between support and resin layer, then adhesive strength is improved, but the reactive compound becomes deactivated during storage, causing adhesive strength to weaken and leading to peeling
Solution Approach 1:
The patent changes the chemical nature of the intermediate layer from reactive compounds to non-reactive polymers with specific functional groups (carboxyl, hydroxyl, or amine groups). This parameter change maintains adhesive strength while eliminating the deactivation problem during storage, as these functional groups provide stable adhesion without undergoing chemical changes over time.
Solution Approach 2:
The patent creates a composite intermediate layer combining specific polymers with functional groups (carboxyl, hydroxyl, or amine) that work synergistically to provide both strong adhesion and long-term stability. The composite structure allows the material to maintain its adhesive properties during storage without the reactive compound deactivation issue.
2Reliability
If the support and resin layer are firmly adhered to prevent peeling during printing, then printing quality is maintained, but the adhesive may fail during storage causing the relief to peel off
Solution Approach 1:
The patent modifies the adhesive system by replacing reactive compounds with non-reactive polymers containing specific functional groups. This change ensures the adhesive remains stable during storage (extended duration) while maintaining reliable adhesion during printing, as the functional groups provide consistent bonding without time-dependent degradation.
3Strength
If an intermediate layer is introduced to improve adhesion, then bonding between support and resin layer is enhanced, but the complexity of the plate structure increases
Solution Approach 1:
The patent applies the intermediate layer selectively between the support and resin layer only where adhesion enhancement is needed. The intermediate layer has specific local properties (functional groups) tailored for bonding, while the rest of the plate structure remains simple and unchanged, thus enhancing adhesion without significantly increasing overall complexity.
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 configuration significantly reduces the likelihood of peeling between the support and the image-forming resin layer, ensuring stable adhesion and improved developing properties during the printing process.
Implementation Method 1
an anionic polymer in the intermediate layer that is in contact with the image-forming resin layer
Data Source
AI summary
An object of the present invention is to inhibit peeling between a support and an image-forming resin layer. The present invention provides: a laminate having a structure in which a support, an intermediate layer and an image-forming resin layer are laminated in the order mentioned, the laminate being characterized by including (A) a cationic polymer in the image-forming resin layer and (B) an anionic polymer in the intermediate layer that is in contact with the image-forming resin layer; and a printing plate original including the laminate.