Inter-penetrating Polymer Network Blanket for Gravure Transfer
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Solution Overview
Problem
Gravure offset printing faces challenges in producing fine conductive wires due to limitations in line width and increased production costs, with traditional screen printing and photolithographic methods being inefficient and environmentally unfriendly, and existing gravure transfer blankets experiencing solvent-induced swelling issues that affect line width uniformity and conductivity.
Innovation Solution
A three-layered blanket structure comprising a foam core, a supporting layer, and a paste transfer layer made of an inter-penetrating network of silicone rubber and fluoroelastomer, which effectively absorbs solvents and maintains conductivity, reducing swelling and extending the blanket's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the paste transfer layer is made entirely of fluoroelastomer to solve swelling, then the swelling resistance is improved, but the solvent absorption capability deteriorates
Solution Approach 1:
The paste transfer layer is constructed as a composite material combining fluoroelastomer and silicone rubber in an inter-penetrating network structure. The fluoroelastomer component provides swelling resistance and dimensional stability, while the silicone rubber component contributes to solvent absorption capability. This composite approach allows both contradictory requirements to be satisfied simultaneously through material synergism.
Solution Approach 2:
The inter-penetrating network structure creates local regions with different material characteristics throughout the paste transfer layer. Certain regions are enriched with fluoroelastomer for swelling resistance, while other regions have higher silicone rubber content for solvent absorption. This spatial distribution of material properties enables the layer to perform both functions effectively.
2Manufacturing precision
If the paste transfer layer absorbs solvent effectively, then the transfer quality is improved, but the line width uniformity deteriorates due to swelling
Solution Approach 1:
The composite structure of fluoroelastomer and silicone rubber in an inter-penetrating network allows the material to absorb solvent without excessive swelling. The fluoroelastomer phase restricts the swelling of silicone rubber, maintaining line width uniformity while still permitting sufficient solvent absorption for high-quality paste transfer.
Solution Approach 2:
The inter-penetrating network structure modifies the physical and chemical parameters of both polymers. The crosslinked network structure changes the swelling behavior and solvent interaction parameters, enabling the material to achieve an optimal balance between solvent absorption and dimensional stability for consistent line width.
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 inter-penetrating network of silicone rubber and fluoroelastomer in the paste transfer layer enhances solvent absorption, maintains line width uniformity, and extends the product lifespan of the blanket, improving the efficiency and cost-effectiveness of gravure transfer printing.
Implementation Method 1
the paste transfer layer is an inter-penetrating network of silicone rubber and fluoroelastomer... the phenomenon of the paste transfer layer absorbing solvent is a necessary phenomenon during the gravure transfer
Data Source
AI summary
A blanket for transferring a paste image from an engraved plate to a substrate is provided. The blanket includes a foam; a supporting layer on the foam; and a paste transfer layer on the supporting layer. The paste transfer layer is an inter-penetrating polymer network of silicone rubber and fluoroelastomer.