Ink Composition Noncyclic Acetal Solvent Rapid Drying
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Solution Overview
Problem
Current ink compositions for continuous deflected jet printing fail to simultaneously meet criteria such as rapid drying, non-clogging of nozzles, excellent adhesion, and regulatory requirements for toxicity and environmental safety, due to limitations in solvent properties.
Innovation Solution
The use of noncyclic acetals, particularly ethylal, as solvents in combination with other organic compounds to achieve the necessary evaporation rate, adhesion, and conductivity, while avoiding the drawbacks of traditional solvents like methanol and methyl ethyl ketone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If traditional solvents like methyl ethyl ketone are used, then rapid drying is achieved, but toxicity and environmental safety requirements are not met
Solution Approach 1:
The patent changes the chemical composition parameters of the solvent system by introducing noncyclic acetal compounds (specifically ethylal and methylal) to replace traditional ketone solvents. This substitution maintains the required evaporation rate for rapid drying while eliminating the toxic and environmentally harmful properties of conventional solvents like methyl ethyl ketone.
Solution Approach 2:
The invention creates a composite solvent system combining noncyclic acetal compounds with other organic solvents in specific proportions. This composite approach allows the ink to achieve both rapid drying characteristics and compliance with safety regulations by leveraging the complementary properties of different solvent components.
2Duration of action of moving object
If high evaporation rate solvents are used, then rapid drying is achieved, but adhesion to various surfaces deteriorates
Solution Approach 1:
The patent optimizes the evaporation rate parameter by selecting noncyclic acetal solvents with specifically controlled boiling points and vapor pressures. These parameters are tuned to ensure sufficient drying speed while maintaining adequate residence time for proper adhesion formation on various substrates.
Solution Approach 2:
The invention employs a composite solvent formulation where noncyclic acetals are combined with other organic solvents in balanced proportions. This composite system ensures that the rapid evaporation needed for drying does not compromise the adhesion quality, as the different solvent components contribute complementary properties to the overall performance.
3Ease of manufacture
If conventional ink compositions are used, then manufacturing simplicity is maintained, but simultaneous achievement of rapid drying, non-clogging, excellent adhesion, and regulatory compliance is not possible
Solution Approach 1:
The patent modifies the chemical parameters of the ink composition by incorporating noncyclic acetal solvents with specific molecular structures and physical properties. These parameter changes enable the ink to simultaneously achieve multiple performance targets including rapid drying, nozzle non-clogging, excellent adhesion, and regulatory compliance, while maintaining manufacturing simplicity through the use of commercially available chemical compounds.
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 composition with noncyclic acetals like ethylal allows for rapid drying, stable ink film formation, excellent adhesion to various surfaces, and compliance with regulatory standards, enabling high-speed marking without nozzle clogging and ensuring ink quality.
Implementation Method 1
The ink composition according to the invention comprises a solvent, at least one noncyclic acetal... said noncyclic acetal... having an evaporation rate which is greater than that of a similar composition based on ethanol alone
Implementation Method 2
The piezoelectric crystal, vibrating at a given frequency, causes pressure disturbances in the inkjet, which oscillates and gradually breaks up into spherical droplets
Implementation Method 3
An electrode, placed in the path of the jet, where it breaks up, makes it possible to give these drops an electrostatic charge, if the ink is conductive
Data Source
AI summary
An ink composition for inkjet printing by the continuous deflected jet technique, which is liquid at ambient temperature, comprising: - a binder; - one or more dyes and/or pigments; and - a solvent, in which: - said solvent comprises at least 10% by weight relative to the total weight of the ink composition of at least one noncyclic acetal, and at least 5% by weight of one or more other organic compounds capable of dissociating the ionizable species that are found in the ink.