Adhesive Tape Structure with Edge Gaps to Suppress Protrusion
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Solution Overview
Problem
Conventional adhesive tape elongation techniques suffer from protruding adhesive agent and blocking issues due to increased pressure during winding, leading to separation of the adhesive film from the base film during cover film release.
Innovation Solution
An adhesive tape structure with a base film, adhesive film, and cover film laminated in order, and a linking tape that integrates the cover films for release, where at least a part of the adhesive film's edge portion is removed on the release initiation side to prevent adhesive protrusion and blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If adhesive tapes are elongated by linking via a linking tape, then the length of adhesive tape that can be wound around a single reel is increased, but adhesive agent protrusion occurs in the linking portions due to pressure increases accompanying an increased number of winding turns
Solution Approach 1:
The adhesive film is extracted or removed from the linking portion of the adhesive tape. This is achieved by forming the adhesive film such that it does not extend into the linking portion where adhesive tapes are connected via the linking tape, thereby eliminating the source of adhesive agent protrusion while maintaining the elongated tape structure
Solution Approach 2:
The adhesive film is designed with non-uniform distribution - it is present in the adhesive tape portions but absent or reduced in the linking portions. This local modification of adhesive film presence creates different properties in different regions: full adhesion capability in tape sections versus no protrusion risk in linking sections
2Length of moving object
If adhesive tapes are elongated by linking via a linking tape, then the length of adhesive tape that can be wound around a single reel is increased, but the adhesive film separates from the base film during release of the cover film causing blocking
Solution Approach 1:
The adhesive film is extracted from the linking portion to prevent the separation and blocking problem. By eliminating the adhesive film in the linking portion, there is no adhesive agent to separate from the base film during cover film release, thus preventing blocking while maintaining the integrated release function
Solution Approach 2:
The adhesive film is pre-configured to be absent or reduced in the linking portion before the covering film is applied. This preliminary structural arrangement ensures that when the cover film is released, the adhesive film cannot separate and cause blocking, as the adhesive film simply does not exist in the problematic linking region
Data Source
AI summary
An adhesive tape structure can suppress protrusion of adhesive agent and blocking. The adhesive tape structure includes adhesive tapes each provided with a base film, an adhesive film, and a cover film laminated in this order, and a linking tape linking the adhesive tapes and configured such that the cover films of the adhesive tapes are integrally released. The adhesive tapes each have a part having a predetermined length completely removed from an edge portion of the adhesive film on a release initiation side in a cover film release direction; the adhesive tape thus has gaps in the edge portions of the adhesive films.