Ink Jet Composition Surface Tension for Nozzle Missing
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Solution Overview
Problem
Existing ink jet heads with recessed liquid storage chambers face issues with insufficient ink pressure due to reduced chamber volume, leading to nozzle missing during ink ejection.
Innovation Solution
The ink jet composition is formulated with a surface tension of 31 mN/m or less at 25° C., which helps in suppressing nozzle missing by ensuring the ink flows effectively along the flow paths in the ink jet head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the liquid storage chamber is formed with a recess structure to limit adhesive contact with ink, then the reliability of the head is improved, but the volume of the liquid storage chamber is decreased
Solution Approach 1:
The patent changes the surface tension parameter of the ink jet composition to 31 mN/m or less at 25°C. This parameter change allows the ink to flow effectively along the flow paths despite the reduced chamber volume, resolving the contradiction between reliability improvement through recess structure and volume reduction.
2Strength
If the liquid storage chamber volume is decreased to suppress nozzle plate peeling, then the adhesive peeling is suppressed, but the pressure to push out the ink becomes insufficient
Solution Approach 1:
The patent adjusts the surface tension parameter of the ink to 31 mN/m or less, which changes the ink's flow characteristics. This allows sufficient ink pressure to be generated even in the reduced volume chamber, preventing both adhesive peeling and ink ejection failure.
Solution Approach 2:
The patent uses a recess structure that copies the flow path geometry into the liquid storage chamber, creating an integrated structure that maintains flow efficiency while reducing the chamber volume and preventing adhesive contact with ink.
3Ease of operation
If the surface tension of the ink jet composition is reduced to 31 mN/m or less, then the ink flow along flow paths is improved, but the ink composition becomes more complex
Solution Approach 1:
The patent specifies a surface tension parameter of 31 mN/m or less at 25°C for the ink jet composition. This parameter change improves ink flow efficiency along the flow paths and ensures sufficient pressure generation, while the complexity management is addressed through the overall composition formulation.
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 ink jet composition effectively prevents nozzle missing and maintains the reliability of the ink jet head by ensuring sufficient ink pressure and flow, even with the specific ink jet head structure.
Implementation Method 1
the ink jet composition has a surface tension of 31 mN/m or less at 25° C.
Data Source
AI summary
An ink jet composition according to an embodiment of the present disclosure is an ink jet composition which is ejected from an ink jet head, the ink jet head has a nozzle plate in which nozzles are formed and a flow path substrate which is bonded to one surface of the nozzle plate and in which flow paths including a liquid storage chamber to store a liquid to be supplied to the nozzles are formed, the liquid storage chamber is formed of a recess provided in a surface of the flow path substrate opposite to the nozzle plate, and the ink jet composition has a surface tension of 31 mN/m or less at 25° C.