Blocked Isocyanate Absorbing Layer for Ink Adhesion
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Solution Overview
Problem
Inkjet printing technologies face issues with ink adhesion to supports, leading to peeling of conductive patterns during processing, especially when exposed to chemicals or solvents, resulting in poor durability and electrical conductivity.
Innovation Solution
A blocked isocyanate-based absorbing-layer-forming composition is used, with 50% to 100% of the solid content being blocked isocyanate, which forms uretdione linkages to enhance adhesion and durability, allowing the absorbing layer to maintain stability during plating and solvent exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a latex layer is used as an ink-absorbing layer, then the layer can be formed on the support, but the adhesion is insufficient and the layer peels off easily
Solution Approach 1:
The patent changes the chemical composition parameters of the absorbing layer by incorporating blocked isocyanate (50-100% of solid content) and specific curing agents, transforming the layer from having insufficient adhesion to achieving strong bond strength that resists peeling
Solution Approach 2:
The patent creates a composite absorbing layer material combining blocked isocyanate, curing agents, and other components, where the composite structure provides both adhesion to the support and resistance to peeling during processing
2Ease of manufacture
If the absorbing layer is exposed to chemicals or solvents during processing, then plating and other treatments can be performed, but the layer peels off and durability is reduced
Solution Approach 1:
The patent applies preliminary anti-action by incorporating blocked isocyanate and curing agents that create a chemically resistant network before processing begins, preventing peeling from occurring during subsequent chemical exposure and plating operations
Solution Approach 2:
The blocked isocyanate acts as an intermediary substance that forms a protective interface between the absorbing layer and external chemicals, mediating the interaction to prevent direct damage and peeling while allowing necessary processing to occur
3Productivity
If conductive ink is printed directly on the support surface, then the conductive pattern can be formed, but the ink peels off easily resulting in broken wires
Solution Approach 1:
The patent introduces an absorbing layer as an intermediary between the conductive ink and the support surface, where this intermediate layer provides the necessary adhesion to prevent ink peeling while allowing the conductive pattern to be formed successfully
Solution Approach 2:
The patent changes the surface properties and adhesion parameters by applying the blocked isocyanate-based absorbing layer, transforming the support surface from having poor ink adhesion to having strong bond strength that prevents conductive ink peeling
4Ease of manufacture
If the absorbing layer uses conventional materials, then the layer can be formed, but it degrades due to heat during firing and adhesion is reduced
Solution Approach 1:
The patent changes the thermal stability parameters by selecting blocked isocyanate and curing agents with high heat resistance, allowing the absorbing layer to maintain its composition and adhesion properties during the firing process without degradation
Solution Approach 2:
The patent creates a thermally stable composite material system combining blocked isocyanate, heat-resistant curing agents, and other components, where the composite structure provides both formability and heat stability during the firing process
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 composition achieves good adhesion to various supports and high durability, preventing peeling during processing, enabling the formation of reliable conductive patterns and electronic components without bleeding or cracking.
Implementation Method 1
forms uretdione linkages to enhance adhesion and durability
Implementation Method 2
absorbing layer capable of absorbing a fluid such as an ink
Data Source
AI summary
The present invention provides an absorbing-layer-forming composition including a blocked isocyanate such that the amount of the blocked isocyanate is 50% by mass to 100% by mass of the solid content of the absorbing-layer-forming composition and an absorbing substrate, a printed item, and a conductive pattern that are formed using the absorbing-layer-forming composition. The absorbing-layer-forming composition according to the present invention can be used for forming an absorbing layer which is capable of carrying a fluid such as an ink therein and which enables good adhesion between various types of supports and a conductive layer to be achieved. In particular, using a blocked isocyanate having a number-average molecular weight of 1,000 to 5,000 further increases the adhesion between various types of supports and the conductive layer.