Coloring of a textile layer and a textile layer
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Solution Overview
Problem
Existing methods for coloring textiles face a trade-off between achieving high brightness and ink adhesion, with conventional techniques failing to optimize both simultaneously, leading to poor image quality and ink durability on textiles.
Innovation Solution
A method involving a polyurethane-based primer coating applied to the textile, followed by a curing process and a second coating with a coloring agent, where the primer layer is transparent and thin to enhance adhesion and prevent ink penetration, using techniques like spray guns or ink-jets for application, and adapting the rheology of the primer for specific textiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the ink is kept at the top surface of the textile to achieve high brightness, then the brightness is improved, but the ink adhesion deteriorates
Solution Approach 1:
A polyurethane-based primer coating is applied as an intermediary layer between the textile substrate and the coloring agent. This primer layer serves as a mediator that provides both adhesion to the textile and a surface for the coloring agent to sit on, resolving the contradiction between adhesion and brightness by creating a functional interface layer.
Solution Approach 2:
The primer coating is applied and cured before applying the coloring agent. This preliminary action prepares the surface by creating an adhesive base layer that will hold the coloring agent in place, ensuring both adhesion and subsequent brightness when the coloring agent is applied.
2Reliability
If the ink is embedded deep within the textile to achieve good bonding, then the ink adhesion is improved, but the brightness deteriorates
Solution Approach 1:
The polyurethane primer acts as a mediator layer that is applied to the textile surface but remains distinct from both the substrate and the coloring agent. It provides adhesion functionality without requiring the coloring agent to penetrate deep into the textile, thus maintaining brightness while achieving good bonding.
Solution Approach 2:
The coating system is segmented into distinct functional layers: the textile substrate, the polyurethane primer layer, and the coloring agent layer. This segmentation allows each layer to perform its specific function - the primer provides adhesion while the coloring agent layer maintains brightness on the surface.
3Reliability
If a thicker primer coating is applied to improve adhesion, then the ink adhesion is improved, but the flexibility of the textile deteriorates
Solution Approach 1:
The thickness of the primer coating is optimized to a specific range (20-120 μm) to achieve the desired balance between adhesion and flexibility. By controlling the thickness parameter within this optimal range, the primer provides sufficient adhesion while maintaining the textile's flexibility and drape.
Solution Approach 2:
The primer coating is applied with controlled local thickness characteristics, being thin enough (20-120 μm) to maintain textile flexibility in areas requiring drape and movement, while providing sufficient coverage for adhesion. The rheology is adapted to achieve uniform local application.
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 results in improved adhesion and brightness of the coloring agent, maintaining the flexibility of the textile and enhancing its durability and lifespan by preventing ink absorption, thus providing a brighter and more robust colored textile layer.
Implementation Method 1
curing the first coating, wherein the first coating is transparent after the curing
Implementation Method 2
The curing may comprise applying heat to the textile layer at a temperature between 20° C. and 150° C.
Implementation Method 3
The applying the first and/or second coating may comprise applying the first and/or second coating using a spray gun
Implementation Method 4
The applying the first and/or second coating may comprise applying the first and/or second coating using a spray gun, a silicon pad or an ink-jet
Data Source
AI summary
The present invention relates to a textile layer comprising a first coating, wherein the first coating is a cured coating and comprises a polyurethane. The textile layer further comprises a second coating, wherein the second coating comprises at least one coloring agent and is arranged on the cured first coating. The polyurethane based cured first coating is transparent.