Recording Head Filling Liquid Moisturizing Agent Agglomeration
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Solution Overview
Problem
Recording heads in inkjet systems often experience ejection failures due to agglomeration of pigment components during transportation and storage, and existing solutions fail to effectively inhibit this agglomeration and ensure easy introduction and stable purging of filling liquids.
Innovation Solution
A recording head filling liquid comprising a specific moisturizing agent, a monovalent alkali, and water, with a static surface tension of 20.0 to 29.0 mN/m, is used to inhibit pigment component agglomeration and facilitate easy introduction and stable purging, ensuring high dispersion stability and freedom in selecting counter ions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the recording head is filled with inkjet ink for ejection testing, then ejection performance can be inspected, but pigment components may agglomerate during transportation and storage causing ejection failure
Solution Approach 1:
The patent applies preliminary action by filling the recording head with a protective liquid containing a specific moisturizing agent (formula 1) with 19-42% by mass before shipping. This protective liquid prevents pigment agglomeration during transportation and storage, and can be easily purged later to restore ejection performance without causing clogging
Solution Approach 2:
The patent uses an intermediary substance (protective liquid with moisturizing agent formula 1) that mediates between the conflicting requirements of maintaining ejection performance and preventing pigment agglomeration. The moisturizing agent acts as a mediator that prevents pigment particles from aggregating while being easily removable during purging operations
2Stability of the object's composition
If the recording head is filled with a solution without pigment components for shipping, then pigment agglomeration is prevented, but the filling liquid must be easily purged when left unused
Solution Approach 1:
The patent applies parameter changes by carefully controlling the composition parameters of the protective liquid, specifically using a moisturizing agent with formula (1) at 19-42% by mass and adjusting the static surface tension to 20-29 mN/m. These parameter optimizations enable the liquid to prevent pigment agglomeration while maintaining easy purgability through balanced viscosity and surface tension characteristics
3Ease of operation
If the recording head filling liquid enters the ink flow channel to dilute remaining ink, then the filling liquid must be easily introduced, but introducing liquids with inappropriate surface tension may cause flow issues
Solution Approach 1:
The patent applies parameter changes by optimizing the static surface tension of the protective liquid to 20-29 mN/m, which enables easy introduction into the ink flow channel through appropriate wetting properties while maintaining stable flow characteristics and preventing clogging during subsequent operations
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 filling liquid effectively prevents pigment component agglomeration, ensures stable purging, and is easily introduced into the recording head, thereby preventing ejection failures and maintaining high dispersion stability.
Implementation Method 1
The specific moisturizing agent is a compound represented by general formula (1) below, and has a percentage content of at least 19.00% by mass and no greater than 42.00% by mass. The recording head filling liquid effectively prevents pigment component agglomeration
Implementation Method 2
The recording head filling liquid enters the ink flow channel of the recording head and dilutes the inkjet ink remaining in the ink flow channel
Implementation Method 3
The recording head filling liquid contains a specific moisturizing agent, a monovalent alkali, and water
Data Source
AI summary
A recording head filling liquid contains a specific moisturizing agent, a monovalent alkali, and water. The specific moisturizing agent is a compound represented by general formula (1) below. The specific moisturizing agent has a percentage content of at least 19.00% by mass and no greater than 42.00% by mass. The recording head filling liquid has a static surface tension at 25° C. of at least 20.0 mN/m and no greater than 29.0 mN/m.In general formula (1), a, b, and c each represent, independently of one another, an integer of at least 1 and a+b+c is at least 4 and no greater than 20.