Coiled Sealing Tape With Direct-Contact Liner
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Solution Overview
Problem
Existing sealing tapes for joints are complex to produce due to the attachment of double-sided adhesive tapes to foam carriers, and the varying adhesive strengths can complicate unwinding.
Innovation Solution
A sealing tape design featuring a foam web with a cover element web in direct contact, where the cover element has less elasticity than the foam and no additional adhesive layer, allowing for easy separation and use as a roll without adhesives, using materials like paper or PET, and impregnated with polymers for improved sealing and insulation properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a double-sided adhesive tape is attached to the foam carrier during manufacture, then the cover element can be held on the foam web, but the production process becomes complex and the varying adhesive strengths complicate unwinding
Solution Approach 1:
The patent removes the adhesive layer from the system by using a foam web with inherently low adhesion to the cover element. This extraction of the adhesive component simplifies the production process while maintaining the necessary holding function through controlled non-adhesion, allowing easy unwinding without adhesive residue or varying adhesive strengths.
2Stability of the object's composition
If an adhesive layer is used between the cover element and foam web, then the cover element can be attached, but the unwinding process becomes difficult due to varying adhesive strengths
Solution Approach 1:
The adhesive layer is completely removed from the system. The foam web's inherent low adhesion properties provide sufficient holding during storage and handling while allowing effortless unwinding without adhesive resistance, eliminating the contradiction between attachment stability and unwinding ease.
3Reliability
If multiple layers of adhesive are used to ensure proper sealing, then the sealing performance improves, but the production complexity and material usage increase
Solution Approach 1:
The adhesive layers are removed and replaced by the foam web's inherent sealing properties through its cellular structure and compression behavior. This single-layer foam design achieves reliable sealing without the complexity of multiple adhesive layers, reducing both production complexity and material usage while maintaining sealing reliability.
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
Simplifies the production and unwinding process of sealing tapes by eliminating the need for additional adhesives, ensuring reliable sealing and insulation performance even at elevated temperatures and pressures.
Implementation Method 1
The foam web is preferably compressed in a ready-made state. In this case, the compression takes place, as is known per se from the prior art, in particular in a direction running perpendicular to the direction in which the foam web extends.
Implementation Method 2
The cover element preferably has less elasticity than the foam carrier or the foam web.
Implementation Method 3
By introducing impregnating polymer particles, for example as a dispersion in the foam, the resilience or sealing behavior of the sealing tape can be significantly improved.
Data Source
Figure 1~3
AI summary
Sealing tape (1) for building sealing and in particular for sealing joints, comprising a tape-like foam sheet (4) extending in a predetermined longitudinal direction (L) and width direction (B), which has a first surface (4a) and a second surface (4b) opposite the first surface (4a), wherein this first surface (4a) and the second surface (4b) extend both in the longitudinal direction and in a width direction perpendicular to this longitudinal direction, and a cover element sheet (2) which also extends in the predetermined longitudinal direction (L), wherein the cover element sheet (2) has a first surface (2a) and a second surface (2b) opposite the first surface (2a). According to the invention, the cover element sheet (2) is in direct contact with the foam sheet (4) with at least one surface (2a).