Adhesive Layer Release Force Control via Microprotrusion Air Gap
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Solution Overview
Problem
Existing adhesive tape products face challenges in adjusting the release force of the release layer, preventing contamination of the adhesive layer, and maintaining stability over time, especially when using non-silicone adhesives, as they can be affected by migration of release agents which can lead to changes in adhesion strength and potential contamination.
Innovation Solution
Incorporating a microprotrusion structure on the release layer with a wall-shaped portion that surrounds an air layer between the adhesive and release layers, allowing for adjustable release force and protection of the adhesive layer from contamination by eliminating the need for a release agent between the microprotrusions and the adhesive, thus preventing agent migration and maintaining consistent adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a release agent layer is used between the release layer and adhesive layer, then the release force can be adjusted, but the release agent may migrate to the adhesive layer over time, causing temporal changes in release force and potential contamination
Solution Approach 1:
The invention extracts and eliminates the release agent layer from the structure. Instead of using a release agent between the release layer and adhesive layer, the patent employs direct contact between the microprotrusion tips and adhesive layer, allowing release force adjustment through geometric parameters of the microprotrusions rather than through release agent properties, thereby preventing migration and ensuring temporal stability
Solution Approach 2:
The invention changes the parameters from chemical (release agent composition) to geometric (microprotrusion dimensions, shape, and distribution). By controlling the geometry of microprotrusions rather than relying on release agent chemistry, the system achieves adjustable release force without the harmful effects of agent migration and temporal instability
2Ease of operation
If a release agent is used, then the release layer can be released from the adhesive layer, but toxic gases may be emitted during incineration of the adhesive tape
Solution Approach 1:
The invention removes the release agent component entirely from the system. By using direct mechanical contact between microprotrusion tips and the adhesive layer, the release function is achieved without any release agent, thereby eliminating the source of toxic gas emissions during incineration while maintaining ease of operation
Solution Approach 2:
The invention converts the potential harm of release agent migration and toxic emission into a benefit by using a release agent-free design. The microprotrusion structure provides release capability through pure mechanical means, transforming a chemically-based system with harmful byproducts into a physically-based clean system
3Object-affected harmful factors
If the release layer is placed directly on the adhesive layer, then contamination can occur, but introducing an air layer with microprotrusions increases structural complexity
Solution Approach 1:
The invention uses a thin release layer with integrated microprotrusions that acts as both a protective barrier and a release mechanism. The release layer functions as a flexible thin film structure that prevents contamination while enabling controlled release through its microprotrusion geometry, avoiding the need for complex multi-layer constructions
Solution Approach 2:
The invention merges multiple functions into a single release layer structure: contamination protection, release force control, and release mechanism all are integrated into one component with microprotrusions. This consolidation achieves contamination prevention without proportionally increasing complexity, as the microprotrusions serve multiple purposes simultaneously
Data Source
Figure 1A~1B
Figure 1C~2A
Figure 2B~3
AI summary
An article 10 is provided with an adhesive layer 14 that includes an adhesive, a release layer 12 that is stacked on the adhesive layer 14, and an air layer 16 that is interposed between the adhesive layer 14 and the release layer 12. On a surface 12a of the release layer 12 that opposes the adhesive layer 14, microprotrusions 20 that contact the adhesive layer 14 with tips 20a are provided. The microprotrusions 20 are provided with a wall-shaped portion 22 having a shape that at least partially surrounds the air layer 16 between the adhesive layer 14 and the release layer 12. The wall-shaped portion 22 protects a main portion 14a of the adhesive layer 14 that is adjacent to the air layer 16 from contamination. By selecting a shape, dimensions, and the like of the microprotrusions 20, a release force of the release layer 12 can be adjusted to a desired range.