Pneumatic vehicle tire
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 ).
1. A pneumatic vehicle tire comprising a sound-absorbing inner which is adhesively attached to an inner surface, opposite from a tread of, the pneumatic vehicle tire, wherein the sound-absorbing absorber is adhered to a self-sealing sealant, which at least immediately after application, the self-sealing sealant has a tackiness required for the purposes of adhesive attachment;
the pneumatic vehicle tire further comprising a separating layer arranged between the self-sealing sealant and the sound-absorbing inner, wherein the separating layer ensures flowability of the self-sealing sealant, and wherein the self-sealing sealant is sufficient for the purposes of sealing and also reliable adhesion of the sound-absorbing inner; and
wherein the separating layer is a powder layer or a layer of tiny plates.
2. The pneumatic vehicle tire as claimed in claim 1 , wherein the separating layer is a film provided with one of a coating, a paper provided with a coating, a fabric provided with a coating, or a fabric soaked with a coating.
3. The pneumatic vehicle tire as claimed in claim 1 , wherein the separating layer is a material which is applied as a liquid and is permanently elastic after curing.
4. The pneumatic vehicle tire as claimed in claim 1 , wherein the separating layer is a material applied from a solid phase.
5. The pneumatic vehicle tire as claimed in claim 1 , wherein the separating layer is a material applied from a gaseous phase.
6. The pneumatic vehicle tire as claimed in claim 1 , wherein the separating layer is composed of organic material.
7. The pneumatic vehicle tire as claimed in claim 1 , wherein the surface of the separating layer has nonstick properties owing to its structure.
8. The pneumatic vehicle tire as claimed in claim 1 , wherein the separating layer is provided with adhesive properties on its surface facing the sound-absorbing inner.
9. The pneumatic vehicle tire as claimed in claim 1 , wherein the separating layer has a maximum thickness of ≤2.0 mm.
10. The pneumatic vehicle tire as claimed in claim 1 , wherein the sound-absorbing inner has a thickness of ≥10 mm.
11. The pneumatic vehicle tire as claimed in claim 1 , wherein the self-sealing sealant is a polyurethane gel.
12. The pneumatic vehicle tire as claimed in claim 1 , wherein the self-sealing sealant is a viscous mixture based on a butyl rubber, on a polybutene, or on silicone.
13. The pneumatic vehicle tire as claimed in claim 1 , wherein the separating layer has a breadth which roughly corresponds to the breadth of the sound-absorbing inner.
14. The pneumatic vehicle tire as claimed in claim 1 , wherein thickness of the self-sealing sealant in those regions in which the separating layer directly rests on the self-sealing sealant is from 1 mm to 5 mm.
15. The pneumatic vehicle tire as claimed in claim 1 , wherein thickness of the self-sealing sealant has local variations.
16. A pneumatic vehicle tire comprising:
a sound-absorbing inner which is adhesively attached to an inner surface, opposite from a tread of, the pneumatic vehicle tire, wherein the sound-absorbing absorber is adhered to a self-sealing sealant, which at least immediately after application, the self-sealing sealant has a tackiness required for the purposes of adhesive attachment;
the pneumatic vehicle tire further comprising a separating layer arranged between the self-sealing sealant and the sound-absorbing inner, wherein the separating layer ensures flowability of the self-sealing sealant, and wherein the self-sealing sealant is sufficient for the purposes of sealing and also reliable adhesion of the sound-absorbing inner; and
wherein the separating layer comprises openings whereby the sound-absorbing inner partially rests directly on the self-sealing sealant, and therefore comes into direct adhesive contact with the self-sealing sealant.
17. The pneumatic vehicle tire as claimed in claim 16 , wherein the separating layer is a powder layer or a layer of tiny plates.
18. The pneumatic vehicle tire as claimed in claim 16 , wherein the openings occupy, in total, an area of from 2% to 50% with respect to the surface area of the sound-absorbing inner.
19. The pneumatic vehicle tire as claimed in claim 16 , wherein the opening, in top view of the separating layer, has the shape of a circle, of an oval, of an elongated slit and/or any desired shape, in an uninterrupted or broken-through manner.
20. A method for producing a pneumatic vehicle tire as claimed in claimed 1 , wherein the sound-absorbing inner is covered with the separating layer radially on the outside, and wherein the self-sealing is applied to the separating layer and arranged on the pneumatic vehicle tire which is already vulcanized.