Nonaqueous Inkjet Ink Composition for Vinyl Polymer Printing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional nonaqueous inkjet ink compositions face challenges in achieving excellent wettability, fixing property, solid-filling property, anti-mottling property, and discharge stability when printing at high speeds on polyvinyl chloride and ethylene-vinyl acetate copolymer surfaces.
Innovation Solution
A nonaqueous inkjet ink composition comprising a binder resin, pigment, pigment dispersant, and organic solvents, with diethylene glycol ethyl methyl ether at 40-80% and propylene carbonate at 7-50% by mass, along with an alkylene glycol derivative with a flash point of 50-150°C, and using acrylic resin and vinyl polymers like vinyl chloride polymer or ethylene-vinyl acetate copolymer as binder resins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional nonaqueous inkjet ink compositions are used, then printing can be performed on vinyl polymer surfaces, but solid-filling property and anti-mottling property are insufficient when printing at high speeds
Solution Approach 1:
The patent changes the chemical composition parameters of the organic solvent system by incorporating specific esters (carboxylic acid esters and/or sulfuric acid esters) with controlled boiling points and polarity, along with precise配比 of glycol ethers and cyclic carbonates. This parameter optimization enables the ink to maintain adequate viscosity and surface tension at high printing speeds while ensuring complete solid-area coverage without mottling defects
Solution Approach 2:
The patent employs a composite solvent system combining multiple organic solvent components with complementary properties: glycol ethers for solubility and flow, cyclic carbonates for polarity control, and ester components for volatility management. This composite formulation achieves synergistic effects that simultaneously improve solid-filling property and prevent mottling at high printing speeds
2Productivity
If conventional nonaqueous inkjet ink compositions are used, then printing can be performed on vinyl polymer surfaces, but discharge stability from the inkjet nozzle is insufficient
Solution Approach 1:
The patent optimizes viscosity and surface tension parameters through careful selection of solvent molecular weight, polarity, and intermolecular forces. The ester components and glycol ether配比 are specifically tuned to maintain stable ink flow and prevent nozzle clogging or inconsistent discharge even at elevated printing speeds
3Manufacturing precision
If alkylene glycol monoether monoester and cyclic ester are used as organic solvents, then wettability and drying property are improved, but solid-filling property becomes insufficient at high printing speeds
Solution Approach 1:
The patent adjusts the boiling point range and polarity parameters of the ester components to balance evaporation rate with ink film formation. The carboxylic acid esters and sulfuric acid esters are selected to provide adequate wettability during the printing process while maintaining sufficient viscosity to prevent ink breakup or incomplete coverage at high printing speeds
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 exhibits high flash point, safety, prevents whiteout, ensures good solid-filling and anti-mottling properties, and maintains discharge stability from the inkjet nozzle, enhancing printing performance on vinyl polymer surfaces.
Implementation Method 1
Nonaqueous inkjet ink compositions must use materials that offer good wettability, drying property, and fixing property, among others, on polyvinyl chloride, ethylene-vinyl acetate copolymer, and other vinyl polymers
Implementation Method 2
Nonaqueous inkjet ink compositions must use materials that offer good wettability, drying property, and fixing property
Data Source
AI summary
An object is to provide a nonaqueous inkjet ink composition offering excellent wettability, fixing property, and discharge stability even when printed at high speed on targets whose printing surface is constituted by polyvinyl chloride, ethylene-vinyl acetate copolymer, or other vinyl polymer. Provided is a nonaqueous inkjet ink composition containing binder resin, pigment, pigment dispersant, and organic solvent, wherein such nonaqueous inkjet ink composition is characterized in that, as organic solvent, diethylene glycol ethyl methyl ether is contained by 40 to 80 percent by mass in the nonaqueous inkjet ink composition along with propylene carbonate contained by 7 to 50 percent by mass in the nonaqueous inkjet ink composition (excluding any composition that contains acetylene surface-active agent).