Adhesive Sheet with Symmetric Dispersive Patterns for Peel Control
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Solution Overview
Problem
Existing adhesive patches for reinforcing binding holes in paper often stick multiple patches together due to randomly applied adhesive surfaces, making it difficult to peel them sheet by sheet effectively.
Innovation Solution
Adhesive sheets with dispersively applied adhesive agent portions arranged in symmetrical patterns, such as line or point symmetry, or along concentric circles, to ensure balanced peel resistance and facilitate sheet-by-sheet peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive agent is applied over the entire area of the base sheet surface, then the adhesive surface provides strong adhesive force, but multiple patches stick together and cannot be peeled sheet by sheet
Solution Approach 1:
The adhesive surface is segmented into multiple discrete adhesive agent portions distributed across the base sheet surface. These portions are arranged in specific patterns (line symmetric, point symmetric, or concentric circular patterns) that allow controlled peeling. The segmentation reduces the total adhesive contact area, enabling sheets to be peeled individually while maintaining sufficient adhesive strength at the bond location.
Solution Approach 2:
Different regions of the base sheet surface have different adhesive properties. Adhesive agent portions are strategically positioned in specific local areas rather than uniformly across the entire surface. This local quality approach ensures strong adhesion at key locations while leaving other areas with reduced adhesion to facilitate peeling.
2Ease of operation
If adhesive agent is partially applied to the base sheet surface, then sheet by sheet peeling becomes possible, but the random positioning of adhesive portions causes inconsistent peeling behavior
Solution Approach 1:
The patent employs symmetric patterns (line symmetry, point symmetry, or concentric circular symmetry) to create balanced adhesive distributions. This symmetry ensures that peeling forces are evenly distributed, allowing consistent and reliable sheet-by-sheet peeling regardless of the direction or location where peeling initiates. The symmetric arrangement eliminates the randomness problem while maintaining partial application benefits.
3Reliability
If adhesive agent portions are arranged in symmetrical patterns, then consistent peel resistance is achieved, but the manufacturing complexity increases
Solution Approach 1:
The symmetric pattern design serves multiple functions: it ensures consistent peel resistance, facilitates sheet-by-sheet peeling, and can be implemented through various manufacturing methods (screen printing, stamping, dispensing). The patterns are designed to be universally applicable to different patch sizes and applications, reducing the need for custom manufacturing processes.
Data Source
Figure 1(a)~1(b)
Figure 2~3
Figure 4~5
AI summary
[Means To Solve The Problems] The patch P has a base sheet B, one surface thereof being an adhesive surface A, and the other surface thereof being a peeling treatment surface L. A laminate P1 is configured by forming a plurality of patches P, and by stacking the adhesive surface A of each of the patches P on the peeling treatment surface L of each of the patches P together. The patch P is peelable, sheet by sheet, from the laminate P1 by adhering the adhesive surface A of the patch P positioned on one end side of the laminate P1 to an area around a hole S1 of the paper S. The adhesive surface A is formed from a number of point-like or water droplet-like adhesive agent portions A1 with an adhesive agent dispersively-applied. The adhesive agent portions A1 are arranged with a line symmetric manner, a point symmetric manner and the like, and other certain regularity.