Liquid Jetting Structure Coating for Wipe-Resistant Nozzle Surfaces
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Solution Overview
Problem
Components contained in a liquid adhere to the jetting surface of a liquid jetting head as foreign substances due to drying, leading to jetting failure, and regular wiping reduces the durability of the jetting surface.
Innovation Solution
A liquid-repellent layer containing a compound with a hydrocarbon group having 8 or more carbon atoms is provided on the jetting surface, along with an interlayer consisting of tantalum oxide, zirconium oxide, titanium oxide, or hafnium oxide, and a second interlayer of SiO2, SiC, SiN, or SiON, enhancing the wipe resistance and alkali resistance of the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If regular wiping is performed to remove foreign substances from the jetting surface, then jetting reliability is improved, but durability of the jetting surface deteriorates
Solution Approach 1:
The patent applies preliminary action by forming a liquid-repellent layer on the jetting surface before foreign substances can adhere. This preventive coating makes it difficult for components in the jetted liquid to stick to the surface, thereby maintaining jetting reliability without requiring frequent wiping that would damage the surface durability.
Solution Approach 2:
The patent converts the harmful effect of liquid components adhering to the surface into a beneficial situation by making the surface liquid-repellent. The liquid-repellent layer causes liquid components to bead up and roll off rather than adhere, transforming what would be a damaging accumulation into a self-cleaning effect that preserves surface durability.
2Reliability
If a liquid-repellent layer is formed on the jetting surface to prevent foreign substance adhesion, then wipe resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs composite materials by combining the liquid-repellent layer with the nozzle substrate to create a multi-layer structure. The liquid-repellent layer is formed using silane coupling agents that chemically bond to the substrate, creating a durable composite structure that provides wipe resistance without requiring complex manufacturing processes.
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 liquid-repellent layer improves the durability and resistance to wiping, maintaining the jetting surface's performance and preventing corrosion from alkaline liquids.
Implementation Method 1
a liquid-repellent layer is provided on a jetting surface of a nozzle substrate, and the liquid-repellent layer contains a compound having a hydrocarbon group having 8 or more carbon atoms
Implementation Method 2
the liquid-repellent layer contains a compound having a hydrocarbon group having 8 or more carbon atoms... enhancing the wipe resistance and alkali resistance of the surface
Implementation Method 3
an interlayer and a liquid-repellent layer are provided in this order on a jetting surface of a nozzle substrate... preventing corrosion from alkaline liquids
Data Source
AI summary
Provided are a liquid jetting structure body, a liquid jetting head, and a liquid jetting device, in which a jetting surface has excellent wipe resistance.The liquid jetting structure body and its applications include a nozzle substrate on which a nozzle jetting a liquid is formed, in which a liquid-repellent layer is provided on a jetting surface of the nozzle substrate, and the liquid-repellent layer contains a compound having a hydrocarbon group having 8 or more carbon atoms.