Ink jet recording method and recording apparatus
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Solution Overview
Problem
Ink jet recording methods on fabric face challenges with cracks and washing resistance, as the amount of ink composition affects durability and cost efficiency, with existing methods struggling to balance ink usage for high-quality, crack-free, and wash-resistant images.
Innovation Solution
An ink jet recording method using an ink composition with a predetermined range of 10 mg/inch² to 250 mg/inch², including a pigment and resin dispersion with specific mass ratios and types, and an organic solvent with a boiling point of 250°C or higher, applied in multiple attachment processes to optimize washing resistance and crack prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large amount of ink composition is attached to fabric to secure concealment, then the base color coverage is improved, but cracks are easily generated in the recorded matter when heated and dried
Solution Approach 1:
The invention changes the chemical composition parameters of the ink composition by specifying a resin content of 3.5% to 30% by mass and a resin-to-pigment mass ratio of 0.5 to 2.5. These parameter changes allow the ink composition to maintain flexibility and adhesion even at high attachment amounts (90-250 mg/inch²), preventing crack generation while securing sufficient concealment of the base color.
Solution Approach 2:
The invention uses a composite ink composition containing both pigment and resin dispersion in specific proportions. The resin component acts as a binder that holds the pigment particles together and adheres them to the fabric, creating a flexible film structure that resists cracking. This composite material approach enables the ink to withstand the stress of heating and drying at high attachment amounts without forming cracks.
2Reliability
If different ink compositions are prepared according to attached amount to optimize performance, then washing resistance and crack resistance are improved, but costs increase and recording apparatus space is consumed
Solution Approach 1:
The invention creates a universal ink composition formulation that can be used across different recording conditions and attachment amounts (10-250 mg/inch²). By specifying a resin content of 3.5% to 30% by mass and a resin-to-pigment ratio of 0.5 to 2.5, the same ink composition achieves optimal performance whether applied in small amounts for text or large amounts for background images. This eliminates the need for multiple separate ink compositions and simplifies the recording apparatus configuration.
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 method achieves high washing resistance and reduces crack generation in recorded images, improving durability and cost efficiency by adjusting ink composition and application processes, while maintaining image quality and reducing ink consumption.
Implementation Method 1
The ink composition includes a pigment and a resin dispersion, and a content of a resin included in the resin dispersion is 0.5 parts by mass to 2.5 parts by mass with respect to 1 part by mass of the pigment
Implementation Method 2
an organic solvent having a boiling point of 250° C. or higher
Data Source
AI summary
An ink jet recording method includes first attaching an ink composition to fabric so as to have an attached amount of 10 mg/inch2 to 30 mg/inch2, and second attaching the ink composition to the fabric so as to have an attached amount of 90 mg/inch2 to 250 mg/inch2, in which the ink composition includes a pigment and a resin dispersion, and a content of a resin included in the resin dispersion is 0.5 parts by mass to 2.5 parts by mass with respect to 1 part by mass of the pigment.