Ink Jet Primer Layer Adhesion for Gold Powder Decoration
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Solution Overview
Problem
The existing member adhering decoration methods using ink jet printing face challenges in adhering gold powder onto ink due to the short time window, leading to issues with ink drying and shape deformation, as well as poor adhesion when the ink is completely dry, resulting in difficulties in achieving accurate decoration.
Innovation Solution
A method involving the formation of a primer layer using tack-containing coating via ink jet printing, followed by applying a decoration layer on this primer layer, which allows for controlled adhesion and includes steps like heating the primer layer above its glass transition point to prevent dust adhesion and ensure proper bonding, and optionally forming a protective layer for durability and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If gold powder is adhered onto ink when the ink is not dry to touch, then adhesion is achieved, but the ink spreads and deforms its shape
Solution Approach 1:
The patent applies preliminary action by forming a primer layer with controlled drying characteristics before applying the decoration layer. The primer layer is designed to provide a specific time window for decoration member adhesion, allowing the decoration to be applied at the optimal moment before the top coat is applied, thus preventing ink spread while ensuring proper adhesion.
2Shape
If gold powder is adhered onto completely dry ink, then shape deformation is prevented, but adhesion fails
Solution Approach 1:
The patent segments the coating process into distinct layers: a primer layer with specific tack properties designed for decoration adhesion, and a separate top coat layer. This segmentation allows each layer to perform its specific function - the primer provides the optimal time window for adhesion while the top coat provides protection and final appearance.
3Ease of operation
If ink jet printing is used for decoration, then workability is improved, but the time window for decoration member adhesion becomes too short
Solution Approach 1:
The patent changes the parameters of the primer layer, specifically its tackiness and drying characteristics, to extend the time window for decoration member adhesion. By controlling the solvent evaporation rate and tack properties of the primer layer, the patent provides sufficient time for decoration application while maintaining the efficiency benefits of ink jet printing.
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 method improves workability by facilitating timely and accurate adhesion of decoration members, preventing shape deformation, enhancing durability, and reducing the risk of fouling, while also allowing for visually appealing and tactilely engaging decorations.
Implementation Method 1
a primer layer forming step for ink jet printing a tack-containing coating, which is a coating that contains a tack, onto the target object during curing or drying to form a primer layer on the target object
Implementation Method 2
a primer layer heating step for heating the primer layer on which the decoration layer is formed in the decoration layer forming step, to a temperature equal to or greater than a glass transition point of the primer layer
Data Source
AI summary
A member adhering decoration method capable of enhancing processability in comparison with conventional methods is provided. The member adhering decoration method for decorating a target object (11) by adhering a decoration member (13a), which is a member for decoration, onto the object (11) includes: a primer layer formation step for ink jet printing a tack-containing coating, which is a coating that contains a tack, onto the object (11) during curing or drying to form a primer layer (12) on the object (11) by using the tack-containing coating; and a decoration layer formation step for applying the decoration member (13a) onto the primer layer (12) formed by the primer layer formation step to thereby form a decoration layer (13) composed of the decoration member (13a) on the primer layer (12) by using the tack of the primer layer (12).