Adhesive Tape Dual-Layer Structure for Aesthetic and Bonding Trade-off
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Solution Overview
Problem
Adhesive tapes with added particles, such as pigments, face a challenge in maintaining desired aesthetic advantages while preserving adhesiveness, as increased particle content tends to lower adhesive strength.
Innovation Solution
The adhesive tape cartridge features a dual-layer adhesive structure where a particle-containing adhesive layer is positioned on one side of the base layer, and a particle-free adhesive layer is on the other side, preventing the reduction in adhesiveness by avoiding particle addition on the surface layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If particles (such as pigments) are added to the adhesive layer, then desired aesthetic advantages (color feeling) are obtained, but adhesiveness is reduced
Solution Approach 1:
The adhesive structure is segmented into two distinct layers: a particle-containing adhesive layer (first adhesive layer) that provides aesthetic color feeling, and a particle-free adhesive layer (second adhesive layer) that ensures strong adhesiveness. This segmentation allows each layer to fulfill its specific function without compromise, resolving the contradiction between appearance and bonding strength.
Solution Approach 2:
Different regions of the adhesive structure are assigned different qualities: the first adhesive layer contains particles for aesthetic purposes, while the second adhesive layer is particle-free for optimal bonding performance. This local differentiation of material properties enables simultaneous achievement of visual appeal and adhesive strength in different parts of the same adhesive system.
2Quantity of substance
If more particles are added to the adhesive layer, then desired aesthetic advantages are enhanced, but adhesiveness is further reduced
Solution Approach 1:
The adhesive is divided into two layers with different particle contents. The first adhesive layer can contain a high quantity of particles to achieve desired aesthetic effects, while the second adhesive layer contains no particles to maintain strong adhesiveness. This segmentation allows high particle content without sacrificing bonding strength.
Solution Approach 2:
The particle concentration is locally optimized in each layer: high particle concentration in the first adhesive layer for aesthetic purposes, and zero particle concentration in the second adhesive layer for bonding purposes. This local quality differentiation resolves the trade-off between particle quantity and adhesive strength.
Data Source
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AI summary
OBJECT To obtain desired advantages from particle addition while suppressing a reduction in adhesiveness. SOLVING MEANS An adhesive tape 150 comprises a film layer 151, a colored layer 180 disposed on one side in a thickness direction of the film layer 151, an adhesive layer 162 disposed on the one side in the thickness direction of the colored layer 180 that comprises an adhesive to which particles are added, an adhesive layer 160 disposed in contact with the one side in the thickness direction of the adhesive layer 162 that comprises an adhesive to which no glittering pigment is added, and an adhesive layer 170 disposed on the other side in the thickness direction of the film layer 151.