Tire Sealant Separating Layer for Flow and Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The flow behavior of the sealant in pneumatic vehicle tires is adversely affected by the internal absorber, leading to delayed or unreliable sealing, especially when foreign objects puncture the tire, causing air leaks.
Innovation Solution
A separating layer with adhesion-reducing properties is introduced between the sealant and the internal absorber, which enhances the flow properties of the sealant and ensures reliable sealing, while also providing sufficient adhesive strength for the absorber without the need for additional coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the internal absorber rests directly on the sealant, then the absorber adheres to the sealant, but the flow behavior of the sealant is adversely affected, leading to delayed or unreliable sealing
Solution Approach 1:
A separating layer with adhesion-reducing properties is introduced between the internal absorber and the sealant. This intermediary layer prevents the absorber from directly contacting and interfering with the sealant's flow behavior, while still allowing the sealant to adhere to the tire inner surface and seal punctures effectively.
Solution Approach 2:
The separating layer is designed with specific local properties: it has adhesion-reducing properties on the surface facing the sealant to prevent interference with sealing, while maintaining structural integrity to support the absorber. This localized functional differentiation resolves the contradiction between adhesion and flow behavior.
2Reliability
If a separating layer is introduced between the sealant and internal absorber, then the sealant flow behavior is improved, but the adhesive strength between absorber and sealant is reduced
Solution Approach 1:
The separating layer exhibits different surface properties on its two faces: the sealant-facing surface has adhesion-reducing properties to maintain sealant flow behavior, while the absorber-facing surface provides sufficient adhesion to hold the absorber in place. This local quality differentiation allows the system to simultaneously achieve reliable sealing and adequate absorber attachment.
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
The separating layer allows for efficient sealing and improved adhesive strength, reducing the impact of the internal absorber on sealing properties and enabling a reliable seal without additional adhesive coatings, thus enhancing the tire's sealing performance.
Implementation Method 1
the separating layer is a film which has adhesion-reducing properties at least on the surface facing the sealant
Implementation Method 2
The inner absorber is a ring made of open-cell foam, which reduces air vibration in the tire and leads to an improvement in noise behavior in the vehicle
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to a pneumatic vehicle tyre with a sound-absorbing inner absorber (9) adhesively attached in its interior to the inner surface (7) opposite from the tread (1), wherein the inner absorber (9) adheres to an automatically sealing sealant (8), which at least immediately after being applied has the tackiness required for the adhesive attachment. In order not to influence the flow properties of the sealant disadvantageously and in order to ensure a reliable sealing effect of the sealant, a separating layer (10) is arranged between the sealant (8) and the inner absorber (9) and the separating layer (10) is made in such a way as to ensure a sufficient flowability of the sealant (8) for the sealing and a reliable adhesive attachment of the foam ring (9).