Printable Recording Media Crosslinked Coating
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Solution Overview
Problem
Inkjet printing technologies face challenges in achieving high image quality and durability due to the limitations of existing printable recording media, particularly in terms of gloss and mechanical resistance, which are compromised by the need for minimal binder content to facilitate fast drying and high-volume jetting.
Innovation Solution
A coated printable recording media is developed with a base substrate and multiple layers, including an ink-receiving layer containing reactive crosslinking agents, inorganic pigment particles, and polymeric binders, applied on one or both sides, to enhance image quality and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If minimal binder content is used in the coating to facilitate fast drying and high-volume jetting, then drying speed and printing productivity are improved, but image durability and mechanical resistance deteriorate
Solution Approach 1:
The patent changes the chemical parameters of the binder by using polymeric binders with specific functional groups (carboxyl, hydroxyl, or amine groups) that can undergo crosslinking reactions. This allows the binder to transform from a simple adhesive to a reactive system that forms durable networks, resolving the contradiction between fast drying and long-term durability.
Solution Approach 2:
The patent creates a composite coating system combining polymeric binders with reactive crosslinking agents. This composite structure provides both the initial adhesion needed for fast drying and the subsequent crosslinked network for enhanced mechanical resistance and image durability, simultaneously addressing both requirements.
2Loss of time
If minimal binder content is used in the coating, then fast drying is achieved, but gloss and image quality deteriorate
Solution Approach 1:
The patent modifies the binder parameters by selecting polymeric binders with specific glass transition temperatures and functional groups. These parameter changes enable the coating to dry quickly while maintaining sufficient binder content to provide the necessary surface smoothness and light reflection for high gloss finish.
Solution Approach 2:
The composite system of polymeric binders and reactive crosslinking agents allows the coating to achieve fast drying through optimized binder composition while the crosslinked network structure maintains surface integrity and gloss, resolving the trade-off between drying speed and visual quality.
3Reliability
If conventional crosslinking agents are used, then image durability is improved, but printing characteristics and jettability deteriorate
Solution Approach 1:
The patent changes the molecular parameters of the crosslinking system by using reactive crosslinking agents with controlled molecular weights and functional group densities. This allows the ink to maintain good flow and jetting characteristics while still achieving effective crosslinking for durable images after deposition.
Solution Approach 2:
The reactive crosslinking agents are pre-incorporated into the coating layer before printing, but the actual crosslinking reaction is triggered after ink deposition through exposure to moisture or heat. This preliminary preparation allows good jettability during printing while achieving durability through post-printing crosslinking.
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 provides excellent print durability, scratch resistance, and high image quality with vivid color and high color density, maintaining good printing characteristics even under mechanical stress, such as rubbing and abrasion.
Implementation Method 1
The coating is allowed to dry to form a crosslinked coating on the substrate. The crosslinking agent crosslinks with the substrate, with the crosslinking agent crosslinking with hydroxyl groups of cellulose and carboxyl groups of gelatin.
Implementation Method 2
The coating composition is applied to the substrate and dried to form a crosslinked coating on the substrate.
Data Source
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Figure 5
AI summary
A printable recording media that comprises a base substrate with an image-side and a back-side. An ink-receiving layer comprising, at least, a reactive crosslinking agent, inorganic pigment particles and/or mixture inorganic particles, and polymeric binders and/or mixture of polymeric binders, is applied to the image-side of the base substrate. Also described herein are a method for forming the printable recording media and a printing method that includes ejecting an ink composition onto the print media described herein.