Method for producing printed textile item
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing printed textile items using inkjet printing fail to achieve excellent concealment properties and often result in ink image cracking during laundering.
Innovation Solution
A method involving the application of a treatment liquid containing an aggregating agent, followed by a white ink with a charge density of at least 30 µeq/g and a color ink with a Young's modulus of not more than 3.0 MPa, using a wet-on-wet inkjet method, to enhance concealment properties and reduce ink image cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a white ink is first printed onto the substrate to improve color development, then the concealment properties are improved, but the ink image cracking occurs during laundering
Solution Approach 1:
The patent changes the charge density parameter of the white ink to at least 30 µeq/g, which is a specific quantitative threshold. This parameter change optimizes the electrostatic interaction between ink particles and fabric, creating a more flexible dried coating film that resists cracking during laundering while maintaining excellent concealment properties
Solution Approach 2:
The patent uses a composite ink composition containing multiple components including coloring materials, binders, and additives with specific charge densities. The white ink is formulated as a composite material with carefully balanced components that work together to provide both concealment and crack resistance, rather than using a simple single-component ink
2Strength
If the Young's modulus of the dried coating film is increased to improve rubbing fastness, then the rubbing fastness is improved, but the ink image becomes brittle and cracks during laundering
Solution Approach 1:
The patent optimizes the Young's modulus parameter by formulating the color ink to have a Young's modulus of not more than 3.0 MPa. This specific parameter range creates a balanced coating film that has sufficient strength for rubbing fastness while maintaining enough flexibility to prevent cracking during laundering cycles
Solution Approach 2:
The patent applies different ink compositions with different properties to different layers: the white ink layer provides concealment with high charge density, while the color ink layer provides color with controlled Young's modulus. Each layer has locally optimized properties that work together to solve both rubbing fastness and crack resistance requirements
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 improves concealment properties and reduces ink image cracking during laundering by enhancing the interaction between the white ink and the fabric, while maintaining image density and flexibility.
Implementation Method 1
a reaction liquid containing a flocculant capable of aggregating constituents in an ink composition or increasing the viscosity of the ink composition
Implementation Method 2
a white ink having a charge density of at least 30 µeq/g
Implementation Method 3
the color ink comprises a crosslinking agent
Data Source
AI summary
A method for producing a printed textile item, the method including applying a treatment liquid containing an aggregating agent to a fabric using an inkjet method, applying a white ink having a charge density of at least 30 µeq/g, using a step of using an inkjet method and a wet-on-wet method, to the fabric to which the treatment liquid has been applied, applying a color ink for which the Young's modulus of the dried coating film is not more than 3.0 MPa, using an inkjet method and a wet-on-wet method, to the fabric to which the white ink has been applied.