Amphoteric Surfactant Cleaning Fluid for Inkjet Printer Nozzles
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Solution Overview
Problem
Existing cleaning fluids for inkjet printers are ineffective in removing dry ink films and improving defective ejection issues, particularly with high-pigment inks using alkali-soluble resins, due to weak cleaning performance and instability in difficult conditions.
Innovation Solution
A cleaning fluid containing an amphoteric surfactant, such as dimethyl lauryl amine oxide, and a basic compound, with a pH range of 9 to 12, is used to effectively dissolve and remove dry ink films from inkjet printer nozzles and heads, improving ejection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cleaning fluids are used to clean dry ink films, then the cleaning process is simple, but the cleaning performance is weak and ineffective in removing dry ink films
Solution Approach 1:
The cleaning fluid uses a composite formulation combining amphoteric surfactants (such as dimethyl lauryl amine oxide) with basic compounds (pH 9-12) and water. This composite approach leverages the synergistic effect where the amphoteric surfactant provides effective cleaning of dry ink films while the basic compound enhances dissolving power, achieving reliable cleaning performance without requiring complex additional components.
Solution Approach 2:
The invention specifies precise parameter ranges: pH 9-12 for the basic compound and 0.1-3% by mass for the amphoteric surfactant. By optimizing these parameters, the cleaning fluid achieves maximum effectiveness in removing dry ink films formed by high-pigment inks with alkali-soluble resins, transforming the cleaning performance from weak to reliable through controlled parameter adjustment.
2Reliability
If the cleaning fluid contains strong solvents to improve cleaning performance, then dry ink films are removed effectively, but occupational health hazards and equipment damage may occur
Solution Approach 1:
The invention converts potentially harmful strong solvents into a safe alternative by using amphoteric surfactants combined with basic compounds. The amphoteric surfactant's unique molecular structure allows it to effectively dissolve dry ink films without the harsh effects of traditional strong solvents, thereby eliminating occupational health hazards and equipment damage risks while maintaining reliable cleaning performance.
Solution Approach 2:
The amphoteric surfactant acts as an intermediary substance that mediates between the cleaning requirement and safety concern. It provides the necessary cleaning power to remove dry ink films while its mild, non-corrosive nature prevents equipment damage and health hazards, serving as a safe intermediary that achieves cleaning effectiveness without harmful side effects.
3Reliability
If existing cleaning methods are used for high-pigment inks with alkali-soluble resins, then the printing process is simple, but defective ejection issues persist due to weak cleaning performance
Solution Approach 1:
The cleaning fluid employs a composite formulation specifically tailored for high-pigment inks containing alkali-soluble resins. The combination of amphoteric surfactant and basic compound creates a synergistic effect that effectively removes the specific type of dry ink film formed by these inks, thereby improving ejection reliability without requiring overly complex additional components.
Solution Approach 2:
The invention optimizes specific parameters (pH 9-12 and amphoteric surfactant concentration of 0.1-3% by mass) to address the cleaning challenges posed by high-pigment inks with alkali-soluble resins. These parameter adjustments enable the cleaning fluid to effectively dissolve and remove the specific chemical composition of dried ink films, thereby resolving defective ejection issues while maintaining formulation simplicity.
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 cleaning fluid efficiently removes dry ink films and addresses defective ejection issues, even with high-pigment inks, maintaining print quality and printer functionality without causing occupational health hazards or equipment damage.
Implementation Method 1
the cleaning fluid contains an amphoteric surfactant... efficiently removes dry ink films
Implementation Method 2
a basic compound, with a pH range of 9 to 12, is used to effectively dissolve and remove dry ink films
Data Source
AI summary
A cleaning fluid for cleaning a site to which ink adheres in an inkjet printer which ejects aqueous inkjet ink containing a pigment and alkali-soluble resin having an acid group in a molecule, wherein the cleaning fluid contains an amphoteric surfactant, a basic compound, and water, a pH range of the cleaning fluid is from 9 to 12, the amphoteric surfactant is at least one selected from a group consisting of dimethyl lauryl amine oxide, lauryl dimethyl amino acetic acid betaine and a 2-al-kyl-n-carboxymethyl-n-hydroxyethyl imidazolinium betaine and is contained in an amount of 0.1 to 3% by mass to the total amount of the cleaning fluid.