JPH08216616A - Retreaded tire used for high speed heavy load - Google Patents

Retreaded tire used for high speed heavy load

Info

Publication number
JPH08216616A
JPH08216616A JP7023904A JP2390495A JPH08216616A JP H08216616 A JPH08216616 A JP H08216616A JP 7023904 A JP7023904 A JP 7023904A JP 2390495 A JP2390495 A JP 2390495A JP H08216616 A JPH08216616 A JP H08216616A
Authority
JP
Japan
Prior art keywords
tire
rubber
modulus
retreaded
carcass ply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7023904A
Other languages
Japanese (ja)
Other versions
JP3502176B2 (en
Inventor
Kazuo Hachitani
和郎 蜂谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP02390495A priority Critical patent/JP3502176B2/en
Publication of JPH08216616A publication Critical patent/JPH08216616A/en
Application granted granted Critical
Publication of JP3502176B2 publication Critical patent/JP3502176B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Tyre Moulding (AREA)
  • Tires In General (AREA)

Abstract

PURPOSE: To enhance durability of a retreaded high speed heavy load tire by restraining or preventing generation of any separation trouble of the retreaded tire when a tire in which coating rubber of high elastic modulus is used in its carcass ply is retreaded. CONSTITUTION: In the case of a retreaded tire used for a high speed heavy load in which tread rubber reinforcing fabric layer and cushion rubber are newly stretched, the retreaded tire is forced to make 100% modulus of its cushion rubber to have 100% modulus ratio of the coating rubber of the carcass ply of base tire in a range from 80 to 120%.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は空気入り更生タイヤに関
するもので、特に、航空機用更生タイヤに代表される高
速重荷重用更生タイヤに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic retread tire, and more particularly to a high speed heavy load retread tire represented by an aircraft retread tire.

【0002】[0002]

【従来の技術】従来から航空機用タイヤは軽量であるこ
とを要求されているのが、近年、航空機用タイヤの軽量
化の要請が一段と高まっている。この要請に応えるため
に、タイヤの骨格部を形成するカーカス・プライに使用
されるコード径を大きくしてカーカス・プライの枚数が
削減され、同時に、カーカスの耐久性とタイヤの剛性を
保持するために、カーカス・プライには高弾性率のコー
ティング・ゴムが使用されるようになった。
2. Description of the Related Art Conventionally, aircraft tires have been required to be lightweight, but in recent years, there has been an increasing demand for weight reduction of aircraft tires. In order to meet this demand, the number of carcass plies is reduced by increasing the cord diameter used for the carcass ply forming the skeleton of the tire, while at the same time maintaining the durability of the carcass and the rigidity of the tire. In addition, carcass plies have come to use high-modulus coating rubber.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記の
ように太糸コードの採用によって軽量化されカーカス・
プライに高弾性率のコーティング・ゴムが使用されてい
るタイヤでは、新品タイヤでは全く問題なく走行する
が、トレッド・ゴムが所定量摩耗した後に残存する古く
なったトレッド・ゴム、補強ファブリック層およびクッ
ション・ゴムをバフして取り除き新たにトレッド・ゴ
ム、補強ファブリック層およびクッション・ゴムを張り
替えた更生タイヤでは、カーカス・プライとクッション
・ゴムの間でセパレーション故障が発生しやすく、した
がって更生タイヤの耐久性が低下するという欠点があっ
た。
However, the use of the thick thread cord as described above reduces the weight of the carcass.
For tires with a high elastic coating rubber in the ply, new tires will run without any problems, but old tread rubber remaining after a certain amount of tread rubber wear, reinforcing fabric layer and cushion・ Buffing rubber to remove tread ・ Rubber, reinforcing fabric layer and cushion ・ Refurbished tires with re-rubbed rubber tend to cause separation failure between carcass ply and cushion ・ rubber, therefore durability of retreaded tire There was a drawback that it decreased.

【0004】本発明の目的は、太糸コードの採用によっ
て軽量化されカーカス・プライに高弾性率のコーティン
グ・ゴムが使用されているタイヤを更生したときに、更
生後のタイヤのセパレーション故障発生を抑制または防
止して、更生耐久性を高めることである。
An object of the present invention is to prevent the occurrence of separation failure of a tire after retreading, when the tire that is lightened by using a thick thread cord and has a carcass ply with a coating rubber having a high elastic modulus is rehabilitated. It is to suppress or prevent and improve rehabilitation durability.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
に、本発明による更生タイヤは、トレッド・ゴム、補強
ファブリック層およびクッション・ゴムを新たに張り替
えた高速重荷重用更生タイヤにおいて、このクッション
・ゴムの100%モジュラスが、台タイヤのカーカス・
プライのコーティング・ゴムの100%モジュラス対比
80乃至120%であることを特徴とする高速重荷重用
更生タイヤである。
In order to achieve the above object, the retreaded tire according to the present invention is a retreaded tire for high-speed heavy load in which tread rubber, reinforcing fabric layer and cushion rubber are newly replaced. 100% modulus of rubber is the carcass of the base tire.
It is a retreaded tire for high-speed heavy load, characterized in that the coating rubber of the ply is 80 to 120% of the modulus of 100%.

【0006】本発明による更生タイヤは、バフされた台
タイヤにクッション・ゴムを張りつけた後に補強ファブ
リック層を張りつけてもよいが、あらかじめクッション
・ゴムを補強ファブリック層に張りつけておいた積層体
を台タイヤに張りつけてもよい。また、本発明による更
生タイヤのクッション・ゴムは、100%モジュラスが
上記の範囲内であれば補強ファブリック層のゴムと同じ
ゴムを使用することができる。この場合、補強ファブリ
ック層の下側(ラジアル方向内側)のコーティング・ゴ
ムを厚くしてクッション・ゴムの機能を果たさせること
が可能である。本発明では、トレッド・ゴムが所定量摩
耗した後の使用済みタイヤに残存する古くなったトレッ
ド・ゴム、補強ファブリック層およびクッション・ゴム
をバフして取り除いたときに、このバフ作業のミスなど
でカーカス・プライのコードが露出した場合に使用する
修理用ゴムの100%モジュラスが、台タイヤのカーカ
ス・プライのコーティング・ゴムの100%モジュラス
対比80乃至120%であることが好ましい。
The retreaded tire according to the present invention may have a reinforcing fabric layer attached to a buffed base tire after attaching a cushion / rubber to the buffed base tire. You may attach it to the tire. As the cushion rubber of the retreaded tire according to the present invention, the same rubber as the rubber of the reinforcing fabric layer can be used as long as the 100% modulus is within the above range. In this case, it is possible to thicken the coating rubber on the lower side (inward in the radial direction) of the reinforcing fabric layer so that the function of the cushion rubber can be achieved. In the present invention, when the old tread rubber, the reinforcing fabric layer and the cushion rubber remaining on the used tire after the tread rubber is worn by a predetermined amount are buffed and removed, this buffing operation may cause an error. The 100% modulus of the repair rubber used when the cord of the carcass ply is exposed is preferably 80 to 120% of the 100% modulus of the coating rubber of the carcass ply of the base tire.

【0007】[0007]

【作用】従来のタイヤは、太糸コードの採用によって軽
量化されカーカス・プライに高弾性率のコーティング・
ゴムが使用されているタイヤであっても、カーカス・プ
ライのクラウン部ラジアル方向外側で補強ファブリック
層のラジアル方向内側に位置するクッション・ゴムには
低弾性率のゴムが使用されていた。新品タイヤの場合
は、カーカス・プライのコーティング・ゴムが高弾性率
ゴムであってクッション・ゴムが低弾性率ゴムであって
も、カーカス・プライとクッション・ゴムは未加硫の状
態で貼りあわされた後に加硫されるので両者の間の加硫
後の接着力は十分高いレベルが得られるので、セパレー
ション故障発生の恐れはない。しかしながら、更生タイ
ヤの場合は、カーカス・プライのコーティング・ゴムは
すでに加硫されていてクッション・ゴムは未加硫の状態
であるから、両者の間の接着力は十分でなく、加硫後の
両者の間の弾性率差が大きくなると弱い接着面に応力集
中が発生し、セパレーション故障が発生しやすく、した
がって更生タイヤの耐久性が低下する。
[Function] Conventional tires are made lighter by using thick thread cords, and the carcass ply is coated with a high elastic modulus.
Even for tires using rubber, rubber having a low elastic modulus was used for the cushion rubber located radially outside the crown portion of the carcass ply and radially inside the reinforcing fabric layer. In the case of a new tire, even if the carcass ply coating rubber is high elastic modulus rubber and the cushion rubber is low elastic rubber, the carcass ply and cushion rubber are not vulcanized and attached. Since it is vulcanized after being cured, a sufficiently high level of adhesion between the two after vulcanization can be obtained, so there is no risk of separation failure. However, in the case of a retreaded tire, the carcass ply coating rubber has already been vulcanized and the cushion rubber has not been vulcanized, so the adhesive force between the two is not sufficient, and When the difference in elastic modulus between the two becomes large, stress concentration occurs on the weakly bonded surface, separation failure easily occurs, and thus the durability of the retreaded tire decreases.

【0008】本発明では、トレッド・ゴム、補強ファブ
リック層およびクッション・ゴムを新たに張り替えた高
速重荷重用更生タイヤで、このクッション・ゴムの10
0%モジュラスが、台タイヤのカーカス・プライのコー
ティング・ゴムの100%モジュラス対比80乃至12
0%であって、加硫後の両者の間の弾性率がほぼ同程度
であるので、セパレーション故障発生の恐れがなくな
り、したがって更生タイヤの耐久性が大幅に改良され
る。
According to the present invention, a tread rubber, a reinforcing fabric layer, and a cushion rubber are newly replaced, and a high-speed heavy-duty retread tire is provided.
0% modulus is 80 to 12 compared to 100% modulus of carcass ply coating rubber of base tire
Since it is 0% and the elastic moduli between the two after vulcanization are almost the same, there is no fear of occurrence of separation failure, and therefore the durability of the retreaded tire is greatly improved.

【0009】このクッション・ゴムの100%モジュラ
スが、台タイヤのカーカス・プライのコーティング・ゴ
ムの100%モジュラス対比80%より小さくてもまた
120%より大きくても、セパレーション故障が発生し
やすくなる。
If the 100% modulus of the cushion rubber is smaller than 80% or larger than 120% of the 100% modulus of the coating rubber of the carcass ply of the base tire, separation failure easily occurs.

【0010】[0010]

【実施例】本発明に従う実施例1乃至4のタイヤ、従来
例のタイヤおよび比較例のタイヤについて表1を参照し
て説明すると、いずれもトレッド・ゴムが所定量摩耗
し、1回目の寿命を終了した航空機用空気入りバイアス
・タイヤに残存する古くなったトレッド・ゴム、補強フ
ァブリック層およびクッション・ゴムをバフして取り除
き新たにトレッド・ゴム、補強ファブリック層およびク
ッション・ゴムを張り替えた更生タイヤであって、タイ
ヤ・サイズはH49×19.0−22 32PRであ
る。
EXAMPLES The tires of Examples 1 to 4 according to the present invention, the tire of the conventional example and the tire of the comparative example will be described with reference to Table 1. In each case, the tread rubber is worn by a predetermined amount and the life of the first time is shortened. A retreaded tire in which the old tread rubber, reinforcing fabric layer and cushion rubber remaining in the finished aircraft pneumatic bias tire have been buffed and removed, and the tread rubber, reinforcing fabric layer and cushion rubber have been replaced. Therefore, the tire size is H49 × 19.0-22 32PR.

【0011】表1に示す数値は従来例のタイヤのカーカ
ス・プライのコーティング・ゴムの100%モジュラス
を100として、従来例のタイヤ、実施例1乃至4のタ
イヤおよび比較例のタイヤについて、それぞれのトレッ
ド・ゴム、補強ファブリック層のコーティング・ゴム、
クッション・ゴムおよびカーカス・プライのコーティン
グ・ゴムの100%モジュラスを指数表示したものであ
る。この100%モジュラスは、タイヤから各部材のゴ
ムの厚さ0.3mmのシートを切り出しDINS3Aタ
イプ刃型で切り抜いてテスト・サンプルを作成し、この
サンプルを100mm/分の引っ張り速度の条件で測定
した値である。
The values shown in Table 1 are the values for the conventional tires, the tires of Examples 1 to 4 and the comparative tire, with the 100% modulus of the coating rubber of the carcass ply of the conventional tire being 100. Tread rubber, reinforced fabric layer coating rubber,
It is an index of 100% modulus of cushion rubber and carcass ply coating rubber. The 100% modulus was measured by cutting out a sheet of rubber having a thickness of 0.3 mm from a tire and cutting it out with a DINS3A type blade die to prepare a test sample, and measuring this sample under a condition of a pulling speed of 100 mm / min. It is a value.

【0012】表1から分かるように、従来例のタイヤ、
実施例1乃至4のタイヤおよび比較例のタイヤのカーカ
ス・プライのコーティング・ゴムの100%モジュラス
は同じ値であり、これは新品タイヤが同一のゴム組成で
あったことによる当然の結果である。
As can be seen from Table 1, conventional tires,
The 100% modulus of the coating rubber of the carcass ply of the tires of Examples 1 to 4 and the tire of the comparative example had the same value, which is a natural result because the new tires had the same rubber composition.

【0013】実施例1乃至3のタイヤは、従来例のタイ
ヤと比べると、クッション・ゴムの100%モジュラス
が相対的に大きくなっていて、それぞれ80、100お
よび115となっている。
In the tires of Examples 1 to 3, the cushion rubber has a relatively large 100% modulus, which is 80, 100 and 115, respectively, as compared with the tires of the conventional examples.

【0014】比較例のタイヤは、クッション・ゴムの1
00%モジュラスが本発明の範囲を超えた大きな値とな
っている。
The tire of the comparative example has cushion rubber 1
The 00% modulus is a large value exceeding the range of the present invention.

【0015】実施例4のタイヤは、クッション・ゴムの
100%モジュラスは実施例1のタイヤと同じである
が、補強ファブリック・ゴムの100%モジュラスがク
ッション・ゴムの100%モジュラスと同じものが使用
されている。
The tire of Example 4 has the same 100% modulus of cushion rubber as the tire of Example 1, but the same 100% modulus of the reinforcing fabric rubber is used as the 100% modulus of the cushion rubber. Has been done.

【0016】次に、これらの従来例のタイヤ、実施例1
乃至4のタイヤおよび比較例のタイヤの性能比較結果を
表1に示す。試験条件は、充填内圧205psi、荷重
84900ポンド、速度0からスタートし67秒後に速
度235mphに達するように直線的に速度を増加して
行く離陸ドラム試験を繰り返し行って、セパレーション
故障発生までの走行時間を測定し、その結果を従来例の
タイヤの走行時間を100として指数表示で示してあ
る。数値が大きいほどセパレーション故障が抑制され、
タイヤの耐久性能が優れていることを示す。
Next, these conventional tires, Example 1
The performance comparison results of the tires Nos. 4 to 4 and the tire of the comparative example are shown in Table 1. The test conditions were as follows: internal pressure of 205 psi, load of 84900 lbs, take off drum test starting from 0 speed and increasing speed linearly to reach 235 mph 67 seconds later. Was measured, and the result is shown as an index with the running time of the tire of the conventional example being 100. The larger the number, the more the separation failure is suppressed,
It shows that the tire has excellent durability performance.

【0017】[0017]

【表1】 [Table 1]

【0018】表1の結果から、実施例1乃至4のタイヤ
はいずれも従来例のタイヤおよび比較例のタイヤに比
べ、耐久性能が優れたタイヤであることがわかる。
From the results shown in Table 1, it is understood that the tires of Examples 1 to 4 are tires having excellent durability performance as compared with the tire of the conventional example and the tire of the comparative example.

【0019】[0019]

【発明の効果】本発明によれば、太糸コードの採用によ
って軽量化されカーカス・プライに高弾性率のコーティ
ング・ゴムが使用されているタイヤを更生したときに、
更生後のタイヤのセパレーション故障発生を抑制または
防止して、更生耐久性を高めることができる。
According to the present invention, when a tire having a carcass ply that is coated with a rubber having a high elastic modulus is used because the weight is reduced by using a thick cord, the tire is refurbished,
It is possible to suppress or prevent the occurrence of the separation failure of the tire after the rehabilitation and improve the rehabilitation durability.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 トレッド・ゴム、補強ファブリック層お
よびクッション・ゴムを新たに張り替えた高速重荷重用
更生タイヤにおいて、該クッション・ゴムの100%モ
ジュラスが、台タイヤのカーカス・プライのコーティン
グ・ゴムの100%モジュラス対比80乃至120%で
あることを特徴とする高速重荷重用更生タイヤ。
1. A high-speed heavy-duty retread tire in which a tread rubber, a reinforcing fabric layer, and a cushion rubber are newly replaced, and 100% modulus of the cushion rubber is 100% of the coating rubber of a carcass ply of a base tire. A high-speed heavy-duty retread tire having a% modulus relative to 80 to 120%.
JP02390495A 1995-02-13 1995-02-13 High-speed heavy-duty retreaded tire Expired - Lifetime JP3502176B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP02390495A JP3502176B2 (en) 1995-02-13 1995-02-13 High-speed heavy-duty retreaded tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP02390495A JP3502176B2 (en) 1995-02-13 1995-02-13 High-speed heavy-duty retreaded tire

Publications (2)

Publication Number Publication Date
JPH08216616A true JPH08216616A (en) 1996-08-27
JP3502176B2 JP3502176B2 (en) 2004-03-02

Family

ID=12123462

Family Applications (1)

Application Number Title Priority Date Filing Date
JP02390495A Expired - Lifetime JP3502176B2 (en) 1995-02-13 1995-02-13 High-speed heavy-duty retreaded tire

Country Status (1)

Country Link
JP (1) JP3502176B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011096235A1 (en) 2010-02-04 2011-08-11 株式会社ブリヂストン Retreaded tire
US20140326394A1 (en) * 2013-05-01 2014-11-06 Bridgestone Corporation Tire manufacturing method and tire
WO2015100060A1 (en) * 2013-12-23 2015-07-02 Bridgestone Americas Tire Operations, Llc Precured tire tread with fabric reinforcing layer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1757463B1 (en) 2005-08-22 2012-06-13 Bridgestone Corporation Retread tire and method of producing the same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011096235A1 (en) 2010-02-04 2011-08-11 株式会社ブリヂストン Retreaded tire
CN102811869A (en) * 2010-02-04 2012-12-05 株式会社普利司通 Retreaded tire
US20120308793A1 (en) * 2010-02-04 2012-12-06 Bridgestone Corporation Retreaded tire
CN102811869B (en) * 2010-02-04 2015-04-15 株式会社普利司通 Retreaded tire
JP5947547B2 (en) * 2010-02-04 2016-07-06 株式会社ブリヂストン Rehabilitation tire
US9573423B2 (en) 2010-02-04 2017-02-21 Bridgestone Corporation Retreaded tire
US20140326394A1 (en) * 2013-05-01 2014-11-06 Bridgestone Corporation Tire manufacturing method and tire
WO2015100060A1 (en) * 2013-12-23 2015-07-02 Bridgestone Americas Tire Operations, Llc Precured tire tread with fabric reinforcing layer
US11254165B2 (en) 2013-12-23 2022-02-22 Bridgestone Bandag, Llc Precured tire tread with fabric reinforcing layer

Also Published As

Publication number Publication date
JP3502176B2 (en) 2004-03-02

Similar Documents

Publication Publication Date Title
US11794524B2 (en) Pneumatic tire
CN1107600C (en) Low cost runflat tire with improved carcass
US7712500B2 (en) Pneumatic tire with cushion rubber and method for producing the same
AU681561B2 (en) A radial ply pneumatic tire
US4019551A (en) Chipperless radial ply tire
JP4271766B2 (en) Tire with side wall carcass reinforcement
CA1144851A (en) Pneumatic radial tire
GB1602754A (en) Pneumatic safety tyre
US20090294007A1 (en) Performance tire with sidewall insert
GB2087805A (en) Pneumatic safety tire
JPH11170823A (en) Pneumatic radial tire for heavy load
JP7272362B2 (en) pneumatic tire
EP0931676B1 (en) Improvements to tyres
GB2053815A (en) Pneumatic safety tire
US3964532A (en) Pneumatic tires
JPH08216616A (en) Retreaded tire used for high speed heavy load
JPH08244124A (en) Patch for repairing tubeless pneumatic tire
US20070144640A1 (en) Tire with sacrificial strip for correcting dynamic imbalance
JP2000025413A (en) Pneumatic tire
EP1857300B1 (en) Vehicle run-flat tyre
JP5188936B2 (en) Rehabilitated tire for aircraft and method for manufacturing the same
JP5013755B2 (en) Rehabilitation tire
JPH1159129A (en) High speed and heavy load retreaded tire
JPH0390339A (en) Reclaiming method for radial tire
JP4841893B2 (en) Rehabilitation tire

Legal Events

Date Code Title Description
A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20031204

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20071212

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081212

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081212

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091212

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101212

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101212

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111212

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111212

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121212

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121212

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131212

Year of fee payment: 10

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term