Living-Body Laminate Patch with Solvent-Resistant Protective Layer
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Solution Overview
Problem
Pressure-sensitive adhesion sheets face issues with solvent transfer and deformation during printing, leading to wrinkles and damage from friction, which compromise printing resistance.
Innovation Solution
Incorporating a protecting layer with chemical resistance and optionally abrasion resistance to suppress solvent transfer and deformation, ensuring the laminate patchable a living body maintains its integrity during printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a printed layer is applied directly to the pressure-sensitive adhesion sheet, then the sheet can be customized for specific uses, but solvent transfer causes swelling and deformation leading to wrinkles
Solution Approach 1:
A protecting layer is introduced as an intermediary between the printed layer and the pressure-sensitive adhesion sheet. This protecting layer has chemical resistance to the printing solvent, preventing solvent transfer and swelling of the underlying layers, thereby maintaining surface flatness while allowing printing customization.
2Adaptability or versatility
If printing is performed directly on the pressure-sensitive adhesion sheet, then design flexibility is improved, but friction from printing devices causes damage
Solution Approach 1:
The protecting layer serves as a mediator that absorbs mechanical stress and friction from printing devices, protecting the pressure-sensitive adhesion sheet from damage while allowing design flexibility through printing.
Solution Approach 2:
The protecting layer is formed in advance on the pressure-sensitive adhesion sheet before printing is performed, providing preemptive protection against friction damage from printing devices.
3Ease of operation
If the pressure-sensitive adhesion sheet is made thinner for better conformability, then elasticity is improved, but resistance to solvent transfer and friction damage is reduced
Solution Approach 1:
The structure is segmented into multiple functional layers: a thin pressure-sensitive adhesion sheet for conformability, and a separate protecting layer for printing resistance. This segmentation allows each layer to be optimized independently - the base sheet remains thin for elasticity while the protecting layer provides robust resistance to solvent and friction.
Solution Approach 2:
The invention uses a composite structure combining a pressure-sensitive adhesion sheet with a protecting layer having different material properties. The protecting layer is specifically selected or designed to have high chemical resistance and abrasion resistance, creating a composite material system that exhibits both conformability and printing resistance.
Data Source
Figure 1~2
AI summary
A laminate patchable a living body includes a pressure-sensitive adhesive layer for patching to the living body, a substrate layer disposed on a one-side surface in a thickness direction of the pressure-sensitive adhesive layer and supporting the pressure-sensitive adhesive layer, and a protecting layer disposed on a one-side surface in the thickness direction of the substrate layer.