Dual-Sided Adhesive Tape with Stress-Activated Backing Gaps
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Solution Overview
Problem
Dual-sided adhesive tapes are difficult to transport, handle, and apply due to the exposure of both adhesive layers, and the use of release liners complicates the process and increases costs.
Innovation Solution
Adhesive articles with a backing layer containing invisible cuts that become visible gaps upon stress, allowing adhesion on demand, eliminating the need for release liners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both adhesive layers are exposed for dual-sided adhesion, then adhesion capability is improved, but handling and transportation become difficult
Solution Approach 1:
The patent extracts the non-adhesive protective function from the traditional release liner and integrates it directly into the backing layer by forming a non-adhesive coating on the portion of the backing layer that contacts the adhesive layer. This eliminates the separate release liner component while maintaining the ability to protect the adhesive layer during handling and transportation.
Solution Approach 2:
The patent merges the protective function (previously performed by a separate release liner) with the backing layer structure itself by applying a non-adhesive coating to specific portions of the backing layer. This combination reduces the number of separate components and simplifies the overall structure while maintaining dual-sided adhesion capability.
2Ease of operation
If release liners are used to protect adhesive layers, then handling is simplified, but device complexity and cost increase
Solution Approach 1:
The patent extracts the protective function from the separate release liner component and transfers it to the backing layer itself through the non-adhesive coating. This eliminates the need for a distinct release liner layer, reducing structural complexity while maintaining ease of handling.
Solution Approach 2:
The backing layer is given multiple functions: it provides structural support and simultaneously serves as the protective element through its non-adhesive coating portion. This multi-functionality eliminates the need for a separate release liner, simplifying the overall device structure.
3Reliability
If release liners are used to protect adhesive layers, then adhesion is preserved, but material waste and costs increase
Solution Approach 1:
The patent combines the protective function with the backing layer through the non-adhesive coating, eliminating the separate release liner material. This reduces material waste while maintaining adhesion preservation during storage and handling.
Solution Approach 2:
The non-adhesive coating on the backing layer serves as a temporary protective measure that is naturally discarded when the adhesive layer needs to be activated. This eliminates the need to separately manage and dispose of release liners, reducing material waste and handling steps.
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
Enables easy handling and application of dual-sided adhesive tapes by activating adhesion only when needed, reducing waste and costs associated with release liners.
Implementation Method 1
the cuts are gaps, but the gaps are not visible to the naked eye when the adhesive article is in an unstressed state, but in a stressed state, at least some of the cuts become gaps that permit adhesion
Data Source
Figure 1~2B
Figure 3A~4
Figure 5A~5C
AI summary
Adhesion on demand articles include a layer of adhesive and a backing layer in contact with the adhesive layer. The backing layer includes a plurality of cuts, where the plurality of cuts are gaps but the gaps are not visible to the naked eye when the adhesive article is in an unstressed state, but in a stressed state, at least some of the cuts become gaps that permit adhesion of the first major surface of the adhesive layer to a substrate surface.