Pneumatic Tire

Patent metadata

Field	Value
Publication number	US-2016288588-A1
Application number	US-201415038348-A
Country	US
Kind code	A1
Filing date	Nov 21, 2014
Priority date	Nov 21, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A pneumatic tire according to the present technology is a pneumatic tire provided with a tread section, sidewall sections, and bead sections, a belt-shaped sound-absorbing member being bonded via an adhesive layer to an inner surface of the tire in a region corresponding to the tread section along the circumferential direction of the tire, wherein a bonding surface of the sound-absorbing member is provided with a bonded region that is bonded to the inner surface of the tire and an unbonded region that is not bonded to the inner surface of the tire, and the bonded region is divided by the unbonded region into a plurality of divisions along the circumferential direction of the tire.

First claim

1 . A pneumatic tire provided with a ring-shaped tread section that extends in a circumferential direction of the tire, a pair of side wall sections disposed on both sides of the tread section, and a pair of bead sections disposed to the inside of the side wall sections with respect to a radial direction of the tire, a belt-shaped sound-absorbing member being bonded via an adhesive layer to an inner surface of the tire in a region corresponding to the tread section along the circumferential direction of the tire, the tire being characterized in that
a bonding surface of the sound-absorbing member is provided with a bonded region in which the sound-absorbing member is bonded to the inner surface of the tire and an unbonded region in which the sound-absorbing member is not bonded to the inner surface of the tire, and the bonded region is divided by the unbonded region into a plurality of divisions along the circumferential direction of the tire.

2 . The pneumatic tire according to claim 1 , wherein
the unbonded region has a shape that overlaps an imaginary straight line orthogonal to the circumferential direction of the tire along the entire width of the sound-absorbing member.

3 . The pneumatic tire according to claim 1 , wherein
the bonded region is divided by the unbonded region into a plurality of divisions along a widthwise direction of the tire.

4 . The pneumatic tire according to claim 1 , wherein
the sound-absorbing member is constituted by a single sound-absorbing member extending in the circumferential direction of the tire, the sound-absorbing member being of uniform thickness at least within a range corresponding to the bonding surface of the sound-absorbing member as seen in a cross-section orthogonal to a lengthwise direction thereof, and having a constant cross-sectional shape along the lengthwise direction.

5 . The pneumatic tire according to claim 1 , wherein a volume of sound-absorbing member is more than 20% of a volume of a cavity formed within the tire when the tire is mounted on a rim.

6 . The pneumatic tire according to claim 1 , wherein the sound-absorbing member has a hardness of 60 to 170 N, and a tensile strength of 60 to 180 kPa.

7 . The pneumatic tire according to claim 1 , wherein the sound-absorbing member comprises a cut-out section in at least one location along the circumferential direction of the tire.

8 . The pneumatic tire according to claim 7 , wherein
alternating cut-out sections and unbonded regions are disposed at intervals around the circumferential direction of the tire, and, defining n as the total number of cut-out sections and unbonded regions, a reference angle α as 360°/n, and a tolerance angle β as 90°/n, an angle θ at which the cut-out sections and the unbonded regions are actually disposed satisfies a relationship α−β≦θ≦α+β.

9 . The pneumatic tire according to claim 1 , wherein the adhesive layer is constituted by double-sided adhesive tape, and has a peeling adhesive strength in a range of 8 to 40 N/20 mm.

10 . The pneumatic tire according to claim 1 , wherein the sound-absorbing member is constituted by a porous material containing open cells.

11 . The pneumatic tire according to claim 10 , wherein the porous material is polyurethane foam.

12 . The pneumatic tire according to claim 2 , wherein
the bonded region is divided by the unbonded region into a plurality of divisions along a widthwise direction of the tire.

13 . The pneumatic tire according to claim 12 , wherein
the sound-absorbing member is constituted by a single sound-absorbing member extending in the circumferential direction of the tire, the sound-absorbing member being of uniform thickness at least within a range corresponding to the bonding surface of the sound-absorbing member as seen in a cross-section orthogonal to a lengthwise direction thereof, and having a constant cross-sectional shape along the lengthwise direction.

14 . The pneumatic tire according to claim 13 , wherein a volume of sound-absorbing member is more than 20% of a volume of a cavity formed within the tire when the tire is mounted on a rim.

15 . The pneumatic tire according to claim 14 , wherein the sound-absorbing member has a hardness of 60 to 170 N, and a tensile strength of 60 to 180 kPa.

16 . The pneumatic tire according to claim 15 , wherein the sound-absorbing member comprises a cut-out section in at least one location along the circumferential direction of the tire.

17 . The pneumatic tire according to claim 16 , wherein
alternating cut-out sections and unbonded regions are disposed at intervals around the circumferential direction of the tire, and, defining n as the total number of cut-out sections and unbonded regions, a reference angle α as 360°/n, and a tolerance angle β as 90°/n, an angle θ at which the cut-out sections and the unbonded regions are actually disposed satisfies a relationship α−β≦θ≦α+β.

18 . The pneumatic tire according to claim 17 , wherein the adhesive layer is constituted by double-sided adhesive tape, and has a peeling adhesive strength in a range of 8 to 40 N/20 mm.

19 . The pneumatic tire according to claim 18 , wherein the sound-absorbing member is constituted by a porous material containing open cells.

20 . The pneumatic tire according to claim 19 , wherein the porous material is polyurethane foam.

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Tanno Atsushi

Classifications

• B60C1/00

  Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition · CPC title

• B60C19/002 Primary

  Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior · CPC title

• B32B2307/102

  Insulating · CPC title

• B32B2307/536

  Hardness · CPC title

• B32B5/18

  characterised by features of a layer {of} foamed material · CPC title