PTC Ink Composition Deformation Control via Solvent Polarity
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Solution Overview
Problem
The addition of a polar rubber solution improves mass productivity in PTC ink compositions but increases the degree of deformation (curving, warping, curling) of printed matters after drying, which affects printing quality and efficiency.
Innovation Solution
A method involving the addition of a non-polar rubber solution prepared in a non-polar solvent to a conductive particle-containing PTC ink composition, followed by a polar solvent, to control deformation while maintaining high mass productivity, using ethylene-acrylic acid copolymers with low acrylic acid content and specific solvents and dispersing conductive particles for improved coating formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a polar rubber solution is added to improve mass productivity, then printing efficiency increases, but the degree of deformation (curving, warping, curling) of printed matters increases
Solution Approach 1:
A polar solvent is introduced as an intermediary substance to mediate between the polar rubber solution and the PTC ink composition. The polar solvent gradually adjusts the polarity of the mixture, allowing the polar rubber solution to be incorporated without causing excessive deformation, thus resolving the contradiction between mass productivity and manufacturing precision
Solution Approach 2:
The polarity parameter of the ink composition is dynamically adjusted by first adding a non-polar rubber solution and then progressively adding a polar solvent. This staged parameter change allows the system to adapt to the polar rubber solution without causing deformation, achieving both high productivity and low deformation
2Ease of manufacture
If a non-polar rubber solution is added to improve processability, then coating formation improves, but mass productivity decreases
Solution Approach 1:
The invention merges the advantages of both non-polar and polar rubber solutions by combining them in a specific sequence. The non-polar rubber solution provides good processability and coating formation, while the subsequently added polar solvent introduces the mass productivity benefits of polar rubber, achieving both ease of manufacture and high productivity
Solution Approach 2:
The non-polar rubber solution is added first to establish good processability and coating formation characteristics. Then, the polar solvent is added as a preliminary step to transition the system toward higher productivity, allowing both processability and mass productivity to be achieved
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
This approach enables smooth printing with continuous coatings, maintains high productivity, minimizes deformation, and improves handling and cost-effectiveness by ensuring excellent printing processability and reduced deformation of printed materials.
Implementation Method 1
adding a non-polar rubber solution prepared by dissolving a non-polar rubber in a non-polar solvent selected from aliphatic hydrocarbons, aromatic hydrocarbons, and mixtures thereof
Implementation Method 2
adding a polar solvent to the resulting mixture
Implementation Method 3
dissolving under heat an ethylene-acrylic acid copolymer (EAA) having an acrylic acid content of 20 wt.% or less in decalin, tetralin, or a mixture thereof
Data Source
AI summary
The invention provides a method for producing a PTC ink composition, which is capable of reducing the degree of deformation (curving, warping, curling, etc.) of dried ink after printing while maintaining mass productivity, and the PTC ink composition. According to the method for producing a PTC ink composition of the invention and the PTC ink composition obtained by this method, a non-polar rubber solution prepared by dissolving a non-polar rubber in a non-polar solvent selected from aliphatic hydrocarbons, aromatic hydrocarbons, and mixtures thereof, is added to a conductive particle-containing PTC (Positive Temperature Coefficient) ink composition obtained by dissolving under heat an ethylene-acrylic acid copolymer (EAA) having an acrylic acid content of 20 wt.% or less in decalin, tetralin, or a mixture thereof; and a polar solvent is added to the resulting mixture.