Inkjet Liquid Composition for Concave-Convex Film Uniformity
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Solution Overview
Problem
Conventional inkjet inks struggle to produce cured films with excellent abrasion resistance and chemical resistance, especially when applied to base materials with concave-convex shapes, as they often form uneven films and lack durability.
Innovation Solution
An inkjet liquid composition comprising an organic solvent, a polymerizable compound, a photopolymerization initiator, and a polyether-modified siloxane compound with a weight-average molecular weight of 3,000 or more, where the organic solvent content is between 40% to 90% by mass, and the polyether-modified siloxane compound content is between 2% to 15% by mass, ensuring uniform film formation and enhanced mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional inkjet inks are used on concave-convex surfaces, then application is simple, but the cured film has poor abrasion resistance and chemical resistance
Solution Approach 1:
The patent uses a composite ink composition containing polyether-modified siloxane compound (2-15% by mass), polymerizable compound (85-98% by mass), photopolymerization initiator (0.1-5% by mass), and organic solvent (40-90% by mass). This composite formulation combines the adhesion benefits of siloxane with the crosslinking durability of polymerizable compounds, achieving both ease of application and excellent abrasion/chemical resistance on concave-convex surfaces.
Solution Approach 2:
The patent specifies precise parameter ranges: polyether-modified siloxane compound at 2-15% by mass, polymerizable compound at 85-98% by mass, photopolymerization initiator at 0.1-5% by mass, and organic solvent at 40-90% by mass. These parameter optimizations ensure the ink maintains proper viscosity for jetting while forming a durable cured film with excellent mechanical and chemical properties.
2Device complexity
If conventional inkjet inks are used, then formulation is simple, but uniform film formation on concave-convex surfaces is difficult
Solution Approach 1:
The patent optimizes the polyether-modified siloxane compound content at 2-15% by mass and organic solvent at 40-90% by mass to achieve optimal viscosity and surface wetting properties. This allows the ink to uniformly fill and level on concave-convex surfaces during jetting, producing consistent film thickness and appearance without requiring complex formulation adjustments.
3Strength
If high polyether-modified siloxane compound content is used, then adhesion improves, but viscosity increases affecting jetting performance
Solution Approach 1:
The patent balances polyether-modified siloxane compound content (2-15% by mass) with organic solvent content (40-90% by mass) to achieve optimal viscosity. The siloxane provides adhesion enhancement while the solvent maintains low enough viscosity for efficient jetting. This parameter balance ensures both strong adhesion on concave-convex surfaces and proper flow characteristics for inkjet application.
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 excellent abrasion resistance and chemical resistance for cured films on concave-convex surfaces, preventing film formation issues and ensuring toughness and adhesion, even on complex surface geometries.
Implementation Method 1
a photopolymerization initiator; a step of irradiating the ink jet liquid composition with ultraviolet rays
Implementation Method 2
an organic solvent; wherein a content of the organic solvent is 40% by mass or more and 90% by mass or less with respect to a total mass of the composition
Data Source
AI summary
An ink jet liquid composition contains an organic solvent, a polymerizable compound, a photopolymerization initiator, and a polyether-modified siloxane compound having a weight-average molecular weight of 3,000 or more, and the content of the organic solvent is 40% by mass or more and 90% by mass or less with respect to the total mass of the composition. In addition, an ink jet recording method using the ink jet liquid composition is provided.