Aqueous Inkjet Ink Composition for Nonabsorbent Media Drying
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Solution Overview
Problem
Aqueous inkjet inks struggle with poor drying properties, abrasion resistance, and stability when printed on nonabsorbent media such as coated papers and polyvinyl chloride sheets, leading to issues like ink mixing, smudging, and poor adhesion, which hinder their use in industrial applications.
Innovation Solution
An aqueous inkjet ink composition containing a specific alkali-soluble resin with a glass transition temperature of 45 to 95°C, a polyolefin resin emulsion with an average grain size of 5 to 300 nm, and an acetylenediol-based surfactant, along with other components, to enhance adhesion, discharge stability, and abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If aqueous inkjet ink is used on nonabsorbent media, then the ink can be applied to coated papers and polyvinyl chloride sheets, but the drying property is poor and the ink does not wet or dry easily
Solution Approach 1:
The patent modifies the chemical composition parameters of the aqueous inkjet ink by incorporating specific resins (alkali-soluble resin with glass transition temperature of 40-90°C, water-soluble resin), surfactants, and controlled pH levels (7.0-9.5) to enhance evaporation rate and drying performance on nonabsorbent media without compromising versatility
Solution Approach 2:
The patent creates a composite ink formulation combining multiple resin types (alkali-soluble resin, water-soluble resin), surfactants, pigments, and aqueous components to achieve both broad media compatibility and improved drying properties, where the synergistic interaction of components addresses both versatility and drying time requirements
2Adaptability or versatility
If aqueous inkjet ink is used on nonabsorbent media, then the ink can be applied to various materials, but the abrasion resistance is poor and the printed matters do not resist rubbing
Solution Approach 1:
The patent formulates a composite ink system combining alkali-soluble resin, water-soluble resin, and surfactants that work synergistically to create a durable printed film on nonabsorbent media, where the resin matrix provides mechanical strength and abrasion resistance while maintaining media versatility
Solution Approach 2:
The patent optimizes the molecular weight, glass transition temperature, and chemical composition parameters of the resin components to enhance the mechanical properties of the dried ink film, achieving improved abrasion resistance through controlled polymerization and resin selection
3Adaptability or versatility
If aqueous inkjet ink is used on nonabsorbent media, then the ink can be applied to coated papers and plastic sheets, but the discharge stability is poor and the nozzles become clogged
Solution Approach 1:
The patent carefully controls the pH level (7.0-9.5), ionic strength, and surfactant concentration to maintain ink stability in the nozzle and prevent precipitation or clogging, while still enabling effective discharge onto diverse nonabsorbent media surfaces
Solution Approach 2:
The patent uses surfactants as intermediary substances that reduce surface tension and improve ink wetting and discharge stability across different media types, preventing nozzle clogging by maintaining ink fluidity and preventing pigment aggregation
4Adaptability or versatility
If aqueous inkjet ink is used on nonabsorbent media, then the ink can be applied to various surfaces, but the adhesion is poor and the inks do not permeate easily into the media
Solution Approach 1:
The patent employs surfactants and resin components as intermediary substances that enhance the interfacial adhesion between the aqueous ink and nonabsorbent media surfaces, improving wetting and bonding without requiring media permeation
Solution Approach 2:
The patent adjusts the surface tension, viscosity, and chemical composition parameters of the ink formulation to optimize adhesion to diverse nonabsorbent surfaces, where modified resin structures and surfactant concentrations enhance interfacial bonding strength
5Manufacturing precision
If water-soluble resins are used to improve coating film resistance on polyvinyl chloride sheets, then the image quality and gloss are improved, but the drying property remains poor and the film-forming property is insufficient
Solution Approach 1:
The patent combines water-soluble resins with alkali-soluble resins and surfactants to create a composite formulation that maintains the image quality and gloss benefits while adding improved drying performance through enhanced evaporation characteristics and film-forming capability of the resin combination
Solution Approach 2:
The patent modifies the resin composition parameters by introducing alkali-soluble resin with specific glass transition temperature and molecular weight, and adjusts surfactant concentration to improve both drying rate and film-forming property while preserving the high-gloss image quality achieved by water-soluble resins
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 demonstrates improved high-gap discharge stability, antifouling property, adhesion, drying property, and preservation stability, making it suitable for industrial use on nonabsorbent media.
Implementation Method 1
the surface active agent is acetylene diol surface active agent
Implementation Method 2
adhesion, drying property, abrasion resistance
Implementation Method 3
drying property
Data Source
AI summary
An object is to provide an aqueous inkjet ink composition offering excellent high-gap discharge stability, antifouling property, adhesion, drying property, abrasion resistance, discharge stability, and preservation stability, even when printed on nonabsorbent media. As a solution, an aqueous inkjet ink composition is provided that contains a pigment, an alkali-soluble resin, a polyolefin resin emulsion, a basic compound, an aqueous medium, and a surfactant, wherein the glass transition temperature of the alkali-soluble resin is 40 to 100°C, the average grain size of the polyolefin resin emulsion is 5 to 300 nm, the solids content of the polyolefin resin emulsion is 0.5 to 5.0 percent by mass in the aqueous inkjet ink composition, and the surfactant contains at least an acetylenediol-based surfactant.