Inkjet-Printable Coating Composition for Rapid Drying
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Solution Overview
Problem
Color inkjet printing faces challenges due to substrates lacking necessary properties for ink acceptance, resulting in long dry times and poor print quality or light stability.
Innovation Solution
A coating composition combining a cationic polymer, such as VIVIPRINT™ 200, an anionic polymer salt like GANTREZ® MS-955, and water, along with a crosslinker, applied to substrates like paper or synthetic films to create glossy or satin images that dry rapidly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a surface treatment or media coating is applied to improve inkjet print quality, then print quality and light stability are improved, but the coating complexity and manufacturing process become more complex
Solution Approach 1:
The patent applies composite materials by combining cationic and anionic polymers in a single coating formulation. This dual-polymer system creates a synergistic effect where the cationic polymer provides initial ink receptivity and the anionic polymer contributes to gloss and water resistance, achieving multiple performance goals without requiring separate coating layers or complex multi-step processes
Solution Approach 2:
The coating composition achieves multi-functionality by incorporating polymers that simultaneously provide inkjet receptivity, gloss, water resistance, and rapid drying in a single application. The cationic polymer component attracts and binds ink droplets while the anionic polymer forms a protective matrix, allowing one coating to fulfill multiple functions that would traditionally require separate treatments
2Productivity
If the substrate surface is left untreated to simplify the process, then manufacturing complexity is reduced, but dry time increases and print quality deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the surface energy and chemical composition of the substrate through polymer coating. The cationic polymer's charged groups alter the surface's affinity for ink droplets, enabling rapid absorption and binding. This chemical parameter modification allows the coating to function as a universal substrate treatment that works across different base materials while maintaining fast drying times
3Shape
If a coating is applied to achieve glossy or satin finish, then surface appearance is improved, but the coating process and composition complexity increase
Solution Approach 1:
The patent applies local quality by using the anionic polymer to specifically target and enhance surface gloss properties. The polymer's molecular structure and charge distribution create a smooth, reflective surface layer that imparts glossy or satin finish. This localized functional assignment allows the anionic polymer component to specialize in surface appearance while the cationic polymer handles ink binding, achieving aesthetic goals without requiring additional gloss-enhancing additives or complex 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 composition achieves rapid drying and excellent print quality with high gloss, improved adhesion, smudge resistance, and water resistance, suitable for digital printing on various substrates.
Implementation Method 1
a coating composition which includes both cationic and anionic polymers
Data Source
AI summary
A coating composition for forming an inkjet-printable coating on a substrate is provided herein. The composition includes a cationic polymer, and an anionic polymer salt, preferably maleic anhydride/methyl vinyl ether salt (Ca/Na), e.g. GANTREZ® MS-955 (ISP). The coated substrates herein form ink images which are glossy and dry rapidly.