Transfer Film Layered Structure Resolving Durability and Adhesion Contradiction
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Solution Overview
Problem
Existing transfer films for ID and IC cards lack sufficient transferability and adhesiveness between layers, leading to issues like tailing and burrs during the transfer process, and do not provide adequate durability to the printed surface.
Innovation Solution
A transfer film with a layered structure comprising a protective layer, an intermediate layer, and an adhesive layer, where the protective layer contains an active ray-cured resin, the intermediate layer contains a cured binder resin, and both may include surfactants, enhancing interlayer adhesiveness and surface quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a protective layer is formed using urethane-modified acrylate as an ionizing radiation-curable resin, then the foil cutting on transfer and durability of the protective layer are improved, but the transferability of the transfer layer and adhesiveness between the protective layer and adhesive layer are insufficient
Solution Approach 1:
The patent introduces an intermediate layer between the protective layer and adhesive layer to act as a mediator. This intermediate layer contains a specific resin composition that improves the bonding between the protective layer and adhesive layer, thereby enhancing transferability without compromising the durability provided by the protective layer. The intermediate layer serves as a bridge that resolves the contradiction between durability and transferability.
Solution Approach 2:
The patent employs a composite structure with multiple layers, each having specific resin compositions. The protective layer uses urethane-modified acrylate for durability, while the intermediate layer uses a different resin formulation to optimize transferability. This composite approach allows each layer to perform its specific function, resolving the contradiction between durability and transferability through material composition optimization.
2Strength
If the protective layer is made with high durability materials, then the durability of the print is improved, but the adhesiveness between layers is reduced
Solution Approach 1:
The intermediate layer acts as a mediator that provides strong adhesion between the protective layer and adhesive layer. By introducing this intermediate layer with specific adhesive properties, the patent maintains high durability of the protective layer while simultaneously ensuring sufficient adhesiveness between layers, thus resolving the contradiction between durability and adhesiveness.
Solution Approach 2:
The patent optimizes the resin composition parameters of each layer to achieve the desired balance. The protective layer uses high-durability materials, while the intermediate layer uses materials with optimized adhesive parameters. By changing the chemical composition parameters of different layers, the patent achieves both high durability and sufficient adhesiveness simultaneously.
3Manufacturing precision
If the transfer layer is transferred with high transferability, then the quality of the print is improved, but the durability of the transferred layer is reduced
Solution Approach 1:
The patent divides the transfer layer into multiple functional layers: a protective layer for durability, an intermediate layer for transferability, and an adhesive layer for bonding. This segmentation allows each sub-layer to optimize for its specific function, enabling high print quality through good transferability while maintaining durability through the protective layer, thus resolving the contradiction between manufacturing precision and strength.
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 significantly improves the transferability and durability of the print, preventing defects like tailing and burrs, while ensuring high durability and adhesiveness, resulting in a more reliable and long-lasting transfer process.
Implementation Method 1
the protective layer contains an active ray-cured resin formed by curing an active ray-curable resin by an active ray
Implementation Method 2
the intermediate layer contains a cured binder resin, which is a cured product of a binder resin and a curing agent
Data Source
Figure 1
AI summary
The present invention provides a transfer film of which transfer layer has satisfactory transferability, in which each of layers constituting the transfer layer has satisfactory interlayer adhesiveness, and which can impart very high durability to a print. The present invention solves the above problem by a transfer film 100 in which a transfer layer 10 is provided on a substrate 1, wherein the transfer layer 10 has a layered structure in which a protective layer 3, an intermediate layer 4, and an adhesive layer 5 are layered in this order from the side of the substrate 1, the protective layer 3 is allowed to contain an active ray-cured resin formed by curing an active ray-curable resin by using an active ray, the intermediate layer 4 is allowed to contain a cured binder resin, which is a cured product of a binder resin and a curing agent, and either one or both of the protective layer 3 and the intermediate layer 4 are allowed to further contain a surfactant.