Ink-Jet Head Silicone Coating for Durable Liquid Repellency
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Solution Overview
Problem
Fluorine-based water-repellent materials pose environmental concerns and lack sufficient durability for commercial and industrial printing applications, particularly in ink-jet recording heads.
Innovation Solution
A silicone-containing film with a specific etching condition and composition is applied to the ink-jet recording head, ensuring a uniform distribution of silicone resin, enhancing blade wipe durability and liquid repellency by adjusting the SiC3H9+ peak intensity ratio to 0.70 or more.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorine-based water-repellent materials are used, then liquid-repellency is achieved, but environmental harm occurs and durability is insufficient
Solution Approach 1:
The patent changes the chemical composition parameters by using silicone compounds (specifically siloxane-containing epoxy resins) as alternatives to fluorine-based materials. By adjusting the molecular structure and composition of the silicone compound, the invention achieves both environmental compatibility and improved blade wipe durability, resolving the contradiction between environmental harm and reliability
Solution Approach 2:
The patent employs composite material design by combining silicone compounds with epoxy resin structures. This composite approach creates a water-repellent film that integrates the liquid-repellency of silicone with the durability and adhesion properties of epoxy resin, achieving both environmental sustainability and enhanced reliability for commercial printing applications
2Reliability
If silicone compound is used as water-repellent material, then environmental safety is improved, but blade wipe durability is insufficient
Solution Approach 1:
The patent optimizes the molecular structure parameters of the silicone compound by selecting specific siloxane-containing epoxy resins with controlled molecular weights and functional groups. This parameter optimization ensures that the silicone main chain remains stable within the film while providing adequate blade wipe durability, resolving the contradiction between composition stability and reliability
Solution Approach 2:
The patent applies local quality enhancement by ensuring that the silicone compound is uniformly distributed and segregated at the film surface where water-repellency is needed, while maintaining stable composition throughout the bulk film structure. This localized optimization allows the surface to provide liquid-repellency and the bulk to provide structural stability and durability
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 silicone-containing film provides superior blade wipe durability and liquid repellency, suitable for industrial printing, while minimizing environmental impact.
Implementation Method 1
there is a large degree of freedom in silicone, and a siloxane main chain is segregated on a surface when a film is formed
Data Source
Figure 1A~1B
Figure 2A~2H
Figure 3A~3B
AI summary
An ink-jet recording head, wherein the ink-jet recording head has a silicone-containing film on a surface where a discharge port is provided, when a surface of the silicone-containing film etched in a thickness direction perpendicular to the surface of the silicone-containing film using C60+ with an accelerating voltage of 40 kV applied thereto is subjected to a composition analysis by a time of flight secondary ion mass spectrometry ToF-SIMS, a value of a ratio of an abundance of SiC3H9+ at an etching time of 30 s to an abundance of SiC3H9+ at an outermost surface (0 s) of the silicone-containing film is 0.70 or more, and a contact angle at the outermost surface of the silicone-containing film is 80° or more.