Sealing Tape Roll Structure to Prevent Winding Adhesion
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Solution Overview
Problem
Existing sealing tapes with self-adhesive layers face issues of adhesion between adjacent windings, requiring additional cover layers or double-sided adhesive tapes, which complicate handling and sealing performance.
Innovation Solution
A supply roll design with a self-adhesive layer covered by an adhesive layer having lower adhesion to the self-adhesive layer, ensuring it detaches from the foam side of adjacent windings, allowing easy unwinding and a reinforced seal against joint walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cover layer is provided on the sealing tape to prevent adhesion between windings, then ease of handling is improved, but sealing performance deteriorates due to stiffening of the surface
Solution Approach 1:
An adhesive layer is introduced as an intermediary between the self-adhesive layer and the soft foam. This adhesive layer has lower adhesion to the self-adhesive layer than the self-adhesive layer has to the foam, allowing it to detach during unwinding and prevent adhesion between windings, while not interfering with the sealing contact.
Solution Approach 2:
The sealing tape structure is segmented into distinct functional layers: the soft foam sealing layer, the self-adhesive layer, and the adhesive layer. Each layer performs its specific function independently, allowing the adhesive layer to prevent winding adhesion without compromising the sealing layer's contact with the joint wall.
2Reliability
If a mesh-like cover layer is formed to allow foam expansion, then sealing performance is improved, but device complexity increases
Solution Approach 1:
The cover layer function is extracted and replaced by the adhesive layer with specific adhesion properties. Instead of using a complex mesh structure to allow foam expansion, the solution uses the differential adhesion between layers to achieve the same protective function while maintaining foam flexibility.
Solution Approach 2:
The adhesion parameter of the adhesive layer is specifically controlled to be lower than the adhesion between the self-adhesive layer and foam. This parameter change allows the adhesive layer to detach during unwinding, preventing winding adhesion without requiring complex structural modifications.
3Ease of operation
If double-sided adhesive tape with carrier strip is used to prevent adhesion, then ease of handling is improved, but device complexity increases due to additional carrier tape
Solution Approach 1:
The adhesive layer is designed as a thin, simple layer without a permanent carrier strip. It serves its protective function during winding and storage, then detaches during unwinding, eliminating the need for a permanent carrier structure that would add complexity.
Solution Approach 2:
The adhesive layer is integrated directly into the sealing tape structure as one of its layers, rather than being a separate carrier strip assembly. This merging eliminates the additional complexity of a dual-sided adhesive system with carrier tape while achieving the same adhesion prevention function.
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
Facilitates easy handling and improved sealing performance by preventing adhesion between windings and ensuring a strong bond to joint walls, eliminating the need for additional cover layers or carrier tapes.
Implementation Method 1
the adhesive forces between the self-adhesive layer and the self-adhesive adhesive layer are lower than the adhesive forces between the adhesive layer and the soft foam of the sealing tape
Implementation Method 2
the soft foam, which passes through the mesh openings, to expand as the pores of the pre-compressed sealing tape fill with air
Implementation Method 3
open-pore soft foam
Implementation Method 4
The adhesive strength of the self-adhesive layer ensures that the sealing tape, firmly bonded to the joint, adheres to the opposite wall even when it expands elastically back towards its unloaded position
Data Source
Figure 1~2
AI summary
A supply roll is described comprising a sealing tape (5) made of an open-pore soft foam (1) and a winding core (4) for the coils of the pre-compressed sealing tape (5), which is provided on one side with a self-adhesive layer (2) and bears against each other under radial pressure. To advantageously create functional conditions, it is proposed that the self-adhesive layer (2) be covered with a self-adhesive adhesive layer (3) and that the adhesive forces between the self-adhesive layer (2) and the self-adhesive adhesive layer (3) be lower than the adhesive forces between the adhesive layer (3) and the soft foam (1) of the sealing tape (5).