Pneumatic tire

Patent metadata

Field	Value
Publication number	US-2020180366-A1
Application number	US-201816642540-A
Country	US
Kind code	A1
Filing date	Aug 31, 2018
Priority date	Sep 12, 2017
Publication date	Jun 11, 2020
Grant date	—

Abstract

Provided is a tire manufacturing feature in which, even when an electronic component is disposed on a side wall portion in order to secure sufficient communication performance, damage to the tire or to the electronic component is avoided. A pneumatic tire in which an electronic component is disposed in the interior thereof, wherein a protective layer for reinforcing a side wall is provided at a position on the inside of a carcass and on the outside of an inner liner with respect to the tire axial direction, the protective layer has higher rigidity and lower heat generating properties than the side wall, and the electronic component is disposed between the carcass and the protective layer.

First claim

1 - 8 . (canceled)

9 . A pneumatic tire in which an electronic component is disposed, wherein
a protective layer for protecting the electronic component is provided at a position located at an inner side than the carcass and at an outer side than the inner liner in the axial direction of the tire, and at a position overlapping the sidewall portion in the tire radial direction; the protective layer has higher rigidity and lower heat generation compared to the sidewall; and the electronic component is disposed between the carcass and the protective layer.

10 . The pneumatic tire according to claim 9 , wherein E* (1) of the protective layer at 70° C. and E* (2) of the sidewall at 70° C. satisfy the following formula:
3 MPa≤ E* (1)− E *(2).

11 . The pneumatic tire according to claim 10 , wherein E* (1) of the protective layer at 70° C. and E* (2) of the sidewall at 70° C. satisfy the following formula:
4 MPa≤ E *(1)− E *(2).

12 . The pneumatic tire according to claim 11 , wherein E* (1) of the protective layer at 70° C. and E* (2) of the sidewall at 70° C. satisfy the following formula:
5 MPa≤ E *(1)− E *(2).

13 . The pneumatic tire according to claim 9 , wherein E* (1) of the protective layer at 70° C. and E* (2) of the sidewall at 70° C. satisfy the following formula:
20 MPa≥ E *(1)− E *(2).

14 . The pneumatic tire according to claim 13 , wherein E* (1) of the protective layer at 70° C. and E* (2) of the sidewall at 70° C. satisfy the following formula:
15 MPa≥ E *(1)− E *(2).

15 . The pneumatic tire according to claim 9 , wherein tan δ (1) of the protective layer at 70° C. and tan δ (2) of the sidewall at 70° C. satisfy the following formula:
tan δ(1)+tan δ(2)≤0.25.

16 . The pneumatic tire according to claim 15 , wherein tan δ (1) of the protective layer at 70° C. and tan δ (2) of the sidewall at 70° C. satisfy the following formula:
tan δ(1)+tan δ(2)≤0.20.

17 . The pneumatic tire according to claim 16 , wherein tan δ (1) of the protective layer at 70° C. and tan δ (2) of the sidewall at 70° C. satisfy the following formula:
tan δ(1)+tan δ(2)≤0.15.

18 . The pneumatic tire according to claim 9 , wherein tan δ (1) of the protective layer at 70° C. and tan δ (2) of the sidewall at 70° C. satisfy the following formula:
tan δ(1)+tan δ(2)≥0.07.

19 . The pneumatic tire according to claim 18 , wherein tan δ (1) of the protective layer at 70° C. and tan δ (2) of the sidewall at 70° C. satisfy the following formula:
tan δ(1)+tan δ(2)≥0.10.

20 . The pneumatic tire according to claim 9 , wherein the electronic component is embedded at a position of ±70%, above or below around the position of the maximum tire width, with respect to the distance from the position of the maximum tire width to the bottom of bead core in the equatorial direction in the cross-sectional view of tire.

21 . The pneumatic tire according to claim 9 , wherein the electronic component is a RFID.

Assignees

• Sumitomo Rubber Ind

Inventors

• Nakajima Hiroki
• Yoshizumi Takuma

Classifications

• B60C19/00 Primary

  Tyre parts or constructions not otherwise provided for · CPC title

• B60C2017/0063

  Modulus; Hardness; Loss modulus or "tangens delta" · CPC title

• B60C2013/006

  Modulus; Hardness; Loss modulus or "tangens delta" · CPC title

• B60C2019/004

  Tyre sensors other than for detecting tyre pressure · CPC title