Method for producing printed matter
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Solution Overview
Problem
Aqueous inkjet printing methods face challenges in achieving satisfactory permeability and image fixability on substrates due to limitations in ink penetration and color development, particularly with aqueous inks and pigments, which can result in inferior image quality and fixability.
Innovation Solution
A method involving the sequential application of a pretreatment liquid containing a resin and another containing a coagulant using an inkjet system, where the pretreatment liquids are jetted in a fixed order, with specific landing time differences to enhance the anchoring effect and permeation of the ink into the substrate, improving fixability and image density uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If aqueous inkjet ink is applied directly to the substrate, then the printing process is simple and fast, but the permeability and image fixability are insufficient
Solution Approach 1:
The patent applies pretreatment liquids containing resin and coagulant to the substrate before inkjet printing. This preliminary treatment modifies the substrate surface to improve ink penetration and fixation, resolving the contradiction between simple direct printing and sufficient image fixability.
Solution Approach 2:
The pretreatment liquid acts as an intermediary substance between the substrate and the aqueous inkjet ink. It facilitates better interaction between the ink and substrate by providing resin for anchoring and coagulant for pigment aggregation, thereby improving permeability and fixability without complicating the overall printing process.
2Ease of manufacture
If aqueous pigment ink is used for fabric printing, then the printing process is simple, but the color development is inferior compared to dyes
Solution Approach 1:
The patent applies pretreatment liquid containing coagulant before printing with aqueous pigment ink. The coagulant causes pigment particles to aggregate and bind to the fabric fibers, significantly improving color development and fastness while maintaining the simplicity of the inkjet printing process.
Solution Approach 2:
The pretreatment liquid changes the surface parameters of the fabric by introducing resin and coagulant components. This modification enables better pigment adhesion and color development, transforming the substrate properties to accommodate aqueous pigment ink effectively.
3Reliability
If multiple pretreatment liquids are applied to improve ink penetration, then the permeability and fixability are enhanced, but the process complexity increases
Solution Approach 1:
The patent combines multiple functions into a single pretreatment liquid that contains both resin and coagulant components. This unified approach provides both anchoring and pigment aggregation effects while simplifying the application process compared to using separate pretreatment steps.
Solution Approach 2:
The pretreatment liquid is formulated as a composite material containing resin, coagulant, and other functional components. This composite structure enables multiple functions (anchoring, pigment aggregation, wetting) to be achieved simultaneously, enhancing image fixability without proportionally increasing process complexity.
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 enhances the fixability and image density uniformity of printed matter by ensuring proper penetration and aggregation of the ink within the substrate, leading to improved image quality and stability on various substrates.
Implementation Method 1
a pretreatment liquid B containing a coagulant
Data Source
AI summary
A method for producing printed matter is disclosed that includes applying a pretreatment liquid containing a resin and a pretreatment liquid containing a coagulant to a substrate, and after the applying of these pretreatment liquids, applying an aqueous inkjet ink to the substrate using an inkjet system.