Transfer Sheet Thermoplastic Resin Matting Layer Adhesion
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Solution Overview
Problem
Existing transfer sheet methods using thermosetting resin for the matting layer often result in insufficient curing, leading to reduced adhesiveness between the matting layer and the release layer, and consequently, defective transfers where the release layer remains on the protective layer.
Innovation Solution
A transfer sheet with a release sheet comprising a substrate, an uneven layer containing a matting agent and a thermoplastic resin binder, and a release layer, which provides improved adhesiveness and prevents defective transfers by ensuring good peelability between the release layer and the uneven layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a thermosetting resin is used for the matting layer, then the matting effect is improved, but the adhesiveness between the matting layer and the release layer is reduced when curing is insufficient
Solution Approach 1:
The patent changes the material parameter of the matting layer from thermosetting resin to thermoplastic resin. This parameter change eliminates the curing process requirement while maintaining the matting effect through the physical properties of thermoplastic resin, thereby resolving the adhesion problem caused by insufficient curing.
Solution Approach 2:
The patent creates a composite structure by combining the thermoplastic resin matting layer with a specifically designed release layer. The release layer uses a resin composition that provides optimal adhesion to the thermoplastic resin, creating a composite material system that achieves both matting effect and strong adhesion.
2Ease of operation
If the matting layer is peeled off, then the transfer process is completed, but the release layer remains on the protective layer when adhesiveness is insufficient
Solution Approach 1:
The patent changes the resin type parameter from thermosetting to thermoplastic, which fundamentally alters the adhesion mechanism. Thermoplastic resin provides reversible adhesion that allows clean peeling without residue, improving both ease of operation and transfer quality reliability.
Solution Approach 2:
The patent creates a precise copy transfer system where the matting layer pattern is accurately transferred to the protective layer through controlled adhesion and peeling. The thermoplastic resin enables this copying process by providing sufficient adhesion during transfer followed by clean release, ensuring high-fidelity pattern reproduction.
3Shape
If a thermosetting resin is used for the matting layer, then the matting effect is achieved, but the production complexity increases due to curing requirements
Solution Approach 1:
The patent changes the curing state parameter from requiring chemical curing (thermosetting) to physical setting (thermoplastic). This eliminates the need for curing cycles, reducing production complexity while maintaining the matting effect through the inherent properties of thermoplastic resin.
Solution Approach 2:
The patent extracts the curing step from the manufacturing process by replacing thermosetting resin with thermoplastic resin. This removes the complex curing requirement while preserving the essential matting function, thereby simplifying the overall production process.
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 proposed solution effectively imparts a design with a gloss difference to decorative molded articles while suppressing defective transfers, ensuring good adhesiveness and maintaining the profile stability of the uneven layer.
Implementation Method 1
an uneven layer provided on a portion of one surface of the substrate and containing a matting agent and a binder resin comprising a thermoplastic resin
Data Source
Figure 1~2
AI summary
Provided is a transfer sheet with good transferability that is capable of imparting a design having a gloss difference to a decorative molded article. Also provided is a method for producing a decorative molded article, the method enabling, by using the transfer sheet, impartment of a design having a gloss difference to the decorative molded article and suppression of occurrence of a defective transfer. A transfer sheet (10) including a transfer layer (30) on a release sheet (20), wherein the release sheet (20) includes: a substrate (22); an uneven layer (24) provided on a portion of one surface of the substrate (22) and containing a matting agent and a binder resin including a thermoplastic resin; and a release layer (26) provided on the uneven layer (24) and on a portion of the substrate (22) where the uneven layer is not formed.