Silicone-Coated Inkjet Head Surface for Blade-Wipe Durability
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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 using C60+ at 40 kV and ToF-SIMS analysis to achieve a SiC3H9+ ratio of 0.70 or more, ensuring uniform distribution of silicone resin, enhancing blade wipe durability and liquid repellency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorine-based water-repellent materials are used, then liquid-repellency is improved, but environmental harm increases and durability is insufficient
Solution Approach 1:
The patent changes the chemical composition parameters by using silicone compounds (specifically siloxane-containing epoxy resins) instead of fluorine-based materials. This substitution maintains water-repellent functionality while eliminating environmental harm associated with fluorine compounds. The specific parameter change involves selecting silicone compounds with appropriate molecular structures to achieve both durability and eco-friendliness.
Solution Approach 2:
The patent employs composite material formulation by combining siloxane-containing epoxy resins with other components to create a water-repellent film that achieves superior blade wipe durability. The composite approach allows optimization of both durability and environmental compatibility by selecting specific ratios and types of silicone-based materials.
2Reliability
If silicone compound is used as water-repellent material, then environmental harm is reduced, 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 chain lengths and functional groups. This parameter optimization ensures that the silicone main chain remains segregated on the film surface, providing both durability and compositional stability. The specific parameter control involves adjusting the silicone content and molecular weight to prevent excessive segregation while maintaining surface water-repellency.
3Reliability
If silicone main chain is segregated on surface, then water-repellency is improved, but blade wipe durability decreases
Solution Approach 1:
The patent applies local quality principle by creating a gradient structure where silicone compounds are concentrated at the film surface to provide water-repellency, while the bulk film composition maintains stability. This local segregation is controlled to ensure that the surface layer has high silicone content for repellency, while the underlying layer provides mechanical strength and durability. The local quality approach resolves the contradiction by allowing surface segregation without compromising overall film integrity.
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, with a contact angle of 80° or more and a thickness of 0.1 to 100 μm, ensuring long-lasting performance.
Implementation Method 1
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
Implementation Method 2
a composition analysis by a time of flight secondary ion mass spectrometry ToF-SIMS
Implementation Method 3
Water-repellent materials such as fluorine-based or silicone-based materials may exhibit water-repellency by segregating water-repellent groups on a surface of a water-repellent film
Implementation Method 4
a contact angle at the outermost surface of the silicone-containing film is 80° or more
Data Source
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.