Inkjet Recording Method Using Overlapping Fragrant and Color Inks
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Solution Overview
Problem
Ink jet recording methods face challenges in maintaining the aroma of recorded materials, as fragrances are often evaporated during drying or lose durability when the recorded matter is rubbed or washed.
Innovation Solution
A recording method and ink set that include a fragrant ink containing microcapsules enclosing a fragrance and a color ink with a colorant, resin particles, and water, which are ejected and adhered to a recording medium in a partially overlapping manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a fragrance is directly added to an ink jet ink, then the fragrance can be recorded on the recording medium, but the fragrance is evaporated during drying and the aroma duration is significantly shortened
Solution Approach 1:
The fragrance is enclosed within microcapsules, creating a nested structure where the fragrance core is protected by a capsule shell. This nested configuration prevents direct evaporation of the fragrance during the ink drying process, allowing the fragrance to be released gradually over time rather than immediately evaporating.
Solution Approach 2:
The microcapsule shell acts as a protective barrier that controls the release of fragrance. This shell structure prevents rapid evaporation during drying while allowing controlled release over time, thereby extending the aroma duration while maintaining fragrance content.
2Duration of action of stationary object
If a fragrance enclosed in microcapsules is contained in an ink jet ink, then the fragrance can be protected from evaporation, but the durability of the smell is still insufficient when the recorded matter is rubbed or washed
Solution Approach 1:
The invention combines the fragrant ink containing microcapsules with a color ink containing resin particles. When these inks are applied in an overlapping manner, the resin particles from the color ink form a binding matrix that secures the microcapsules to the recording medium. This merging of two ink systems creates a synergistic effect where the microcapsules are both protected from evaporation and anchored to the medium, significantly improving durability under rubbing and washing.
Solution Approach 2:
The resin particles in the color ink serve as an intermediary binding agent between the microcapsules and the recording medium. These resin particles form a adhesive matrix that holds the microcapsules in place, preventing them from being removed during rubbing or washing while maintaining the fragrance release function.
3Ease of manufacture
If fragrant ink and color ink are applied separately without overlap, then each ink can be applied optimally, but the fragrance lacks durability and the recorded matter lacks comprehensive properties
Solution Approach 1:
The invention merges the application of fragrant ink and color ink by applying them in an overlapping manner. This overlap ensures that the microcapsules in the fragrant ink are positioned within the resin particle matrix of the color ink, creating a integrated structure that simultaneously provides fragrance functionality and durable binding to the recording medium.
Solution Approach 2:
The overlapping application creates local regions where the fragrant ink and color ink are combined, forming a composite structure with enhanced properties. In these overlapping regions, the microcapsules are securely bound by resin particles, creating localized areas of high durability while maintaining the overall fragrance release capability.
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 ensures stable and long-lasting aroma durability on recorded materials, even when subjected to rubbing or washing, while also improving storage and ejection stability of the inks.
Implementation Method 1
a fragrant ink containing microcapsules which enclose a fragrance
Implementation Method 2
a fragrant ink containing microcapsules which enclose a fragrance is ejected by an ink jet method and is adhered to a recording medium
Implementation Method 3
a color ink containing a colorant, resin particles, and water is ejected by an ink jet method and is adhered to the recording medium
Data Source
AI summary
A recording method of the present disclosure includes a fragrant ink adhesion step in which a fragrant ink containing microcapsules which enclose a fragrance is ejected by an ink jet method and is adhered to a recording medium and a color ink adhesion step in which a color ink containing a colorant, resin particles, and water is ejected by an ink jet method and is adhered to the recording medium. In the recording method described above, the fragrant ink and the color ink are adhered to the recording medium so as to be at least partially overlapped with each other thereon.