Nitrile Polymer Emulsion Inkjet Formulation for Abrasion Resistance
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Solution Overview
Problem
Inkjet printing formulations face challenges in achieving good abrasion resistance, solvent resistance, ink storage stability, and continuous film formation on low-liquid or non-liquid absorbing media, while avoiding clogging and ensuring robust images on various recording surfaces.
Innovation Solution
An inkjet printing composition comprising an aqueous liquid vehicle, a pigment, and a nitrile polymer emulsion, specifically a carboxylated acrylonitrile butadiene styrene polymer emulsion, which enhances print adhesion and durability, along with a surfactant to improve jetting performance and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water-based ink with pigment is used, then environmental impact is reduced and water resistance is improved, but drying time is prolonged on low-liquid absorbing media
Solution Approach 1:
The patent modifies the chemical composition parameters of the ink by incorporating specific polymer emulsions and surfactants that alter the drying kinetics. The polymer emulsion contains functional groups that facilitate faster water evaporation and pigment fixation on non-absorbing media, thereby reducing drying time while maintaining the water-based eco-friendly formulation.
Solution Approach 2:
The patent introduces polymer emulsion particles as intermediary carriers that mediate between the water-based ink and the non-absorbing recording medium. These emulsion particles facilitate rapid water removal and pigment adhesion, acting as a bridge that accelerates the drying process without compromising environmental compatibility.
2Quantity of substance
If pigment particles are deposited on low-liquid absorbing media, then image formation is achieved, but rub fastness deteriorates due to poor penetration
Solution Approach 1:
The patent employs a composite ink formulation combining pigment particles with polymer emulsion and surfactant components. This composite structure creates a unified deposit on the recording medium where the polymer matrix binds pigment particles together and to the substrate, significantly enhancing rub fastness while maintaining effective pigment deposition for image formation.
Solution Approach 2:
The patent creates localized quality differences in the ink deposit by forming a polymer-pigment composite structure where the polymer emulsion provides mechanical bonding strength at the pigment-substrate interface. This local reinforcement at critical contact points ensures high rub fastness even with minimal pigment penetration into the non-absorbing medium.
3Strength
If water insoluble polymers are used for print adhesion, then image robustness is improved, but ink storage stability deteriorates due to potential clogging
Solution Approach 1:
The patent transforms the polymer form from insoluble to emulsified state, changing the physical-chemical parameters of the polymer dispersion. The polymer emulsion maintains colloidal stability in storage with controlled particle size distribution and charge, preventing clogging, while providing strong adhesion properties when deposited and dried on the recording medium.
Solution Approach 2:
The patent uses surfactant molecules as intermediaries that adsorb at the polymer particle surface, providing electrostatic or steric stabilization during storage. This intermediary layer prevents polymer aggregation and printhead clogging, while the polymer core maintains its adhesion functionality for robust image formation.
4Strength
If polymer emulsion is used to form continuous film, then abrasion resistance is improved, but formulation complexity increases
Solution Approach 1:
The patent selects polymer emulsions that perform multiple functions simultaneously: they provide abrasion resistance through film formation, facilitate rapid drying on non-absorbing media, ensure stable storage prevention, and enhance pigment adhesion. This multi-functionality reduces the need for separate additives, thereby managing formulation complexity while achieving comprehensive performance improvement.
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 provides robust images with improved abrasion and solvent resistance, maintains ink stability, and forms a continuous film on diverse media, ensuring effective printing without clogging, especially on low-liquid absorbing surfaces.
Implementation Method 1
The ink should show a quick drying with no coagulation, and should form a continuous film during drying
Implementation Method 2
along with a surfactant to improve jetting performance and resistance
Data Source
AI summary
The present invention relates to an inkjet printing composition comprising an aqueous liquid vehicle, a pigment and a nitrile polymer emulsion; to an inkjet printing system comprising an inkjet composition, a recording medium and an inkjet printer; to a method of forming a printed image with an inkjet printing system and to the use of an inkjet printing composition in an inkjet printing system.