Flame-Retardant Fabric Print Medium for Ink Bleed Control
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Solution Overview
Problem
Challenges in textile printing arise due to fabric's absorptive and crystalline nature, leading to poor image quality, ink bleed, and durability issues, along with concerns about flammability and adhesive properties, especially for wallcovering fabrics.
Innovation Solution
A fabric printable medium is developed with a water-repellant treatment, an adhesion promoting layer, an ink-receiving coating layer, and a barrier layer, including polymeric compounds and flame retardant properties, to enhance image quality, durability, and fire resistance while maintaining fabric softness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If fabric is treated as highly absorptive, then ink absorption increases, but image quality diminishes and ink bleed occurs
Solution Approach 1:
A coating layer is applied to the fabric surface to act as an intermediary between the ink and the fabric. This coating layer has controlled porosity and chemical composition that allows uniform ink distribution while preventing excessive absorption and bleed, thereby maintaining image quality while enabling adequate ink uptake.
Solution Approach 2:
The physical and chemical parameters of the fabric surface are modified through the application of a coating layer with specific porosity, hydrophobicity, and adhesion properties. This changes the fabric's interaction with ink from highly absorptive to controlled absorption, improving image quality while maintaining necessary ink uptake.
2Strength
If adhesive coating is applied to improve bond strength, then adhesion increases, but fabric flammability increases
Solution Approach 1:
The coating layer is formulated as a composite material containing polymeric binders, flame retardant particles (such as aluminum trihydrate or magnesium hydroxide), and adhesion promoters. This composite structure provides both strong adhesive bonding and fire resistance, as the flame retardant particles decompose endothermically to release water and form protective char layers that inhibit combustion.
Solution Approach 2:
Flame retardant particles are incorporated into the coating layer to convert the harmful effect of flammability into a beneficial protective function. These particles decompose when exposed to fire, releasing water vapor that cools the fabric and forms a protective barrier, thereby reducing flammability while maintaining adhesion properties.
3Manufacturing precision
If coating layer is applied to improve print characteristics, then image quality improves, but fabric texture and softness are compromised
Solution Approach 1:
The coating layer is designed with local quality variations, being applied only where needed for print reception and having different compositional properties in different regions. The coating provides excellent print characteristics on the surface while maintaining the fabric's natural texture and softness in the bulk material, achieving localized improvement without global compromise.
4Manufacturing precision
If water-repellant treatment is applied to prevent ink bleed, then ink containment improves, but aqueous ink absorption decreases
Solution Approach 1:
The hydrophobicity parameter of the coating layer is precisely controlled to balance ink containment and absorption. By adjusting the concentration of hydrophobic additives and the crosslinking density of the polymeric network, the coating provides sufficient water repellency to prevent bleed while maintaining adequate porosity and wettability for aqueous ink absorption and uniform distribution.
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 solution results in improved printing accuracy, image permanence, and fire resistance, addressing the issues of ink interaction, image quality, and fabric properties, while ensuring easy installation and maintaining the fabric's texture.
Implementation Method 1
a water-repellant treatment including a water-repellant agent applied thereto
Implementation Method 2
an adhesion promoting layer, applied to the image-side of the fabric base substrate
Implementation Method 3
a barrier layer applied to the back-side of the fabric base substrate, comprising polymeric binders and filler particles with flame retardancy properties
Data Source
AI summary
A fabric printable medium comprising a fabric base substrate, with an image-side and a back-side, having a water proofing treatment including a water-repellant agent applied thereto; an adhesion promoting layer, applied to the image-side of the fabric base substrate, comprising a polymeric compound and a physical networking component; an ink-receiving coating layer over the adhesion promoting layer, comprising a first and a second crosslinked polymeric network; and a barrier layer applied to the back-side of the fabric base substrate, comprising polymeric binders and filler particles with flame retardancy properties. Also disclosed are the method for making such fabric print medium and the method for producing printed images using said material.