JP2000313072A - Manufacture of pneumatic tire with static elimination function - Google Patents
Manufacture of pneumatic tire with static elimination functionInfo
- Publication number
- JP2000313072A JP2000313072A JP11121869A JP12186999A JP2000313072A JP 2000313072 A JP2000313072 A JP 2000313072A JP 11121869 A JP11121869 A JP 11121869A JP 12186999 A JP12186999 A JP 12186999A JP 2000313072 A JP2000313072 A JP 2000313072A
- Authority
- JP
- Japan
- Prior art keywords
- tread
- rubber
- conductive
- tire
- layer
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
- B29D2030/526—Unvulcanised treads, e.g. on used tyres; Retreading the tread comprising means for discharging the electrostatic charge, e.g. conductive elements or portions having conductivity higher than the tread rubber
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、車両に帯電した静
電気を車両から路面にアースすることができる除電機能
付き空気入りタイヤの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a pneumatic tire with a static elimination function capable of grounding static electricity charged on a vehicle from a vehicle to a road surface.
【０００２】[0002]
【従来の技術】従来、ウェット性能、耐摩耗性、転がり
抵抗の低減を同時に満足させるため、トレッドゴム層を
カーボンブラックに変りシリカを高い割合で配合した不
良導電性ゴムから構成した空気入りタイヤが提案されて
いる。このような空気入りタイヤはトレッドゴムが電気
の通電を遮断するため、車両に蓄積された静電気がタイ
ヤホイールからビード部、サイドウォール部を経てトレ
ッド部から路面にアースされず、ラジオノイズの発生や
電気回路に悪影響を与える等の問題がある。2. Description of the Related Art Conventionally, in order to simultaneously satisfy wet performance, abrasion resistance, and reduction of rolling resistance, a pneumatic tire composed of a defective conductive rubber in which a tread rubber layer is changed to carbon black and silica is blended at a high ratio has been developed. Proposed. In such a pneumatic tire, since the tread rubber cuts off the passage of electricity, static electricity accumulated in the vehicle is not grounded from the tire wheel to the road surface from the tread portion via the bead portion and the sidewall portion, generating radio noise and the like. There are problems such as adversely affecting the electric circuit.
【０００３】このような問題を解決するため、トレッド
構造の一部にカーボンブラックを配合したゴム組成物を
設け、タイヤの導電性を確保しようとする技術が開示さ
れている。例えば、特開平８―３４２０４号は、タイヤ
トレッドゴムの一部にトレッドストリップの表面から底
面に至るまで導電性ストリップを設け、このストリップ
を通じて放電するものである。特開平８―１２０１２０
号、同８―２４４４０９号は、トレッド接地面に導電性
の高いゴム組成物の薄膜を付し、タイヤの帯電性を解消
しようとする技術である。特開平８―１２０１２０、同
９―３０２１２号は、導電性の外側トップトレッドキャ
ップ層をトレッドの外皮として形成し、この外皮を通じ
て放電するものである。[0003] In order to solve such a problem, a technique has been disclosed in which a rubber composition in which carbon black is compounded in a part of a tread structure is provided so as to ensure conductivity of a tire. For example, Japanese Patent Application Laid-Open No. 8-34204 discloses a method in which a conductive strip is provided on a part of a tire tread rubber from the surface to the bottom of the tread strip, and discharge is performed through the strip. JP-A-8-120120
No. 8-244409 is a technique for applying a thin film of a highly conductive rubber composition to a tread contact surface to eliminate the charging property of a tire. JP-A-8-120120 and JP-A-9-30212 disclose that a conductive outer top tread cap layer is formed as an outer skin of a tread, and discharge is performed through the outer skin.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記のような
トレッドストリップの表面から底面に至るまで導電性ス
トリップを設けたり、トレッド接地面に導電性の高いゴ
ム組成物の薄膜を吹き付ける方法はタイヤ製造上簡易と
は言い難い。However, such a method of providing a conductive strip from the surface to the bottom surface of the tread strip or spraying a thin film of a highly conductive rubber composition on the tread grounding surface as described above is not suitable for tire manufacturing. It is hard to say that it is simple.
【０００５】この発明ほ、前述のような除電機能付き空
気入りタイヤを簡単かつ確実に製造することができる製
造方法を提供するところにある。It is an object of the present invention to provide a method of manufacturing a pneumatic tire having a static elimination function as described above in a simple and reliable manner.
【０００６】[0006]
【課題を解決するための手段】本発明者は上記問題解決
のため鋭意検討の結果、第１にベルト層の外側に配置さ
れた不良導電性ゴムからなるトレッドゴム層内に、トレ
ッド表面からベルト層まで延びた導電性ゴムからなる導
電体を設けて、静電気を車両からタイヤを通じて路面に
アースする除電機能付き空気入りタイヤの製造方法であ
って、未加硫ゴムからなる押出し成形された帯状トレッ
ドゴムをタイヤ外周長に合わせ切断した後、トレッド周
長より長い導電性ゴムからなる導電テープを該トレッド
ゴム外周面の長さ方向の一端に合わせ、他方をトレッド
のもう一方の切断端面に接合させ貼り合わせ、未加硫タ
イヤ成型時にベルト層の外周に沿い該トレッドゴムの一
端から他端にかけて貼り合わせる時に前記導電テープが
ベルト層に接するように貼り付け成型した後、加硫を行
って前記導電テープが導電体となり静電気を路面にアー
スされることを特徴とした除電機能付き空気入りタイヤ
の製造方法であり、第２には、ベルト層の外側に配置さ
れたトレッドゴム層が、不良導電性ゴムからなる外側ト
レッドゴム層と導電性ゴムからなる内側トレッドゴム層
からなるキャップ／ベース構造で構成され、キャップト
レッドゴム層表面からベーストレッドゴム層まで延びた
導電性ゴムからなる導電体を設けて静電気を車両からタ
イヤを通じて路面にアースする除電機能付き空気入りタ
イヤの製造方法であって、未加硫ゴムからなる押出し成
形されたキャップ／ベース２層のトレッドゴムが接合さ
れた帯状トレッドゴムをタイヤ外周長に合わせ切断した
後、トレッド周長より長い導電性ゴムからなる導電テー
プを該キャップトレッドゴム外周面の長さ方向の一端に
合わせ、他方を該トレッドゴムのもう一方のベーストレ
ッドゴム層切断端面に接合させ貼り合わせ、加硫を行っ
て前記導電テープが導電体となり静電気を路面にアース
されることを特徴とした除電機能付き空気入りタイヤの
製造方法にある。The inventor of the present invention has made intensive studies to solve the above-mentioned problems. As a result, first, the belt is placed from the tread surface into the tread rubber layer made of defective conductive rubber disposed outside the belt layer. A method for manufacturing a pneumatic tire with a static elimination function for providing a conductor made of conductive rubber extending to a layer and grounding static electricity from a vehicle through a tire to a road surface, comprising: an extruded belt-shaped tread made of unvulcanized rubber. After cutting the rubber according to the tire outer peripheral length, a conductive tape made of conductive rubber longer than the tread peripheral length is aligned with one end in the length direction of the tread rubber outer peripheral surface, and the other is joined to the other cut end surface of the tread. The conductive tape is in contact with the belt layer when pasting from one end to the other end of the tread rubber along the outer periphery of the belt layer during molding and unvulcanized tire molding. A method of manufacturing a pneumatic tire with a static elimination function, wherein the conductive tape becomes a conductor and the static electricity is grounded to a road surface after being bonded and vulcanized. A tread rubber layer disposed outside the cap tread rubber layer, the cap / base structure including an outer tread rubber layer made of defective conductive rubber and an inner tread rubber layer made of conductive rubber. A method of manufacturing a pneumatic tire with a static elimination function for providing static electricity from a vehicle to a road surface through a tire by providing a conductor made of a conductive rubber extending to a layer, wherein the cap / base is made of an unvulcanized rubber. After cutting the belt-shaped tread rubber to which the two layers of tread rubber are joined in accordance with the tire outer peripheral length, the conductive rubber that is longer than the tread peripheral length is cut. A conductive tape consisting of the cap tread rubber is aligned with one end in the length direction of the outer peripheral surface of the cap tread rubber, and the other is bonded and bonded to another cut end surface of the base tread rubber layer of the tread rubber. A method for manufacturing a pneumatic tire with a static elimination function, characterized in that the pneumatic tire becomes a conductor and grounds static electricity on a road surface.
【０００７】また、前記の導電テープは幅が１０ｍｍ〜
４０ｍｍ，厚みが０．２ｍｍ〜０．５ｍｍであることが
好ましい。The conductive tape has a width of 10 mm or more.
The thickness is preferably 40 mm and the thickness is 0.2 mm to 0.5 mm.
【０００８】すなわち、本発明の製造方法では、所定の
長さに切断された後のトレッドゴム表面に導伝性テープ
を貼り付け、その一端を未加硫タイヤ成型時にタイヤ内
部を構成する導伝性部材に接続するのみで除電機能付き
空気入りタイヤを簡単かつ確実に製造することができ
る。That is, according to the manufacturing method of the present invention, a conductive tape is attached to the surface of the tread rubber cut to a predetermined length, and one end of the conductive tape is used to form the inside of the tire at the time of molding an unvulcanized tire. A pneumatic tire with a static elimination function can be easily and reliably manufactured simply by connecting to a conductive member.
【０００９】従って、上記の方法で製造された空気入り
タイヤはタイヤ周上のトレッド接地陸部およびトレッド
パターン溝部に導電性ゴム層が帯状に形成され、その一
端は導電性を有すベルト層あるいはベーストレッド層に
接するため、これを経路として車両に蓄積された静電気
は路面にアースされ帯電性の問題を解消する。Therefore, in the pneumatic tire manufactured by the above method, a conductive rubber layer is formed in a belt-like shape on the tread ground contact portion and the tread pattern groove portion on the tire circumference, and one end of the conductive rubber layer is formed as a conductive belt layer or a conductive rubber layer. Since the base tread layer is in contact with the base tread layer, the static electricity accumulated in the vehicle through the base tread layer is grounded on the road surface to eliminate the problem of chargeability.
【００１０】タイヤ加硫後の導電性ゴム層はトレッドパ
ターンの溝部にも形成されるため、車両の走行によって
タイヤ接地表面陸部の導伝性ゴム層が摩耗し消滅しても
溝部の導伝性ゴム層は残り、タイヤの摩耗が進行しても
アース性能は完全摩耗するまで損なわれない。[0010] Since the conductive rubber layer after vulcanization of the tire is also formed in the groove of the tread pattern, even if the conductive rubber layer on the land portion of the tire ground surface wears and disappears due to the running of the vehicle, the conduction of the groove is reduced. The conductive rubber layer remains, and even if the wear of the tire progresses, the ground performance is not impaired until it is completely worn.
【００１１】[0011]
【発明の実施の形態】図１は本発明により製造された除
電機能付き空気入りタイヤ１の右半分断面図である。こ
のタイヤは一対のビードコア２とビードコアの周りを内
側から外側へ巻き上げられた少なくとも１層のカーカス
層３があり、カーカス層の半径方向外側には複数枚のベ
ルト層４が設けられ、さらにサイドウォール部５があ
り、これらを構成する部材はカーボンブラックを充填剤
として配合された導電性ゴムが使用されている。前記ベ
ルト層の半径方向外側には１層からなるトレッドゴム層
６が配置されている。本発明の対象となる空気入りタイ
ヤの製造方法によるトレッドパターンは特に限定しない
が、トレッド表面には例えば周方向に延びる複数本の溝
７、８および周方向溝と交差する複数の横溝（図示せ
ず）が形成されている。FIG. 1 is a right half cross-sectional view of a pneumatic tire 1 with a static elimination function manufactured according to the present invention. This tire has a pair of bead cores 2 and at least one carcass layer 3 wound around the bead cores from the inside to the outside. A plurality of belt layers 4 are provided on the outside of the carcass layers in the radial direction. There is a portion 5, and a conductive rubber containing carbon black as a filler is used as a member constituting these portions. A tread rubber layer 6 composed of a single layer is disposed radially outside the belt layer. The tread pattern according to the method of manufacturing a pneumatic tire to which the present invention is applied is not particularly limited. For example, a plurality of grooves 7 and 8 extending in a circumferential direction and a plurality of lateral grooves (shown in FIG. Are formed.
【００１２】前記トレッドゴム層は不良導電性ゴムから
構成され、トレッド表面の陸部および溝部には導電性ゴ
ムからなる導電性テープ９が導電性ゴム層として加硫接
着されており、テープの一端はタイヤ内部の導電性ゴム
部材、例えばベルト層に接合されている。ここで、導電
性ゴムとは体積抵抗率が１０７Ω・ｃｍ未満のゴムで天
然ゴム、ジエン系ゴム等のゴム成分にカーボンブラック
を配合成分として４０〜１００重量部含むゴムが挙げら
れ、不良導電性ゴムとは体積抵抗率が１０７Ω・ｃｍ以
上のゴムを言いシリカを高い割合で含むゴムが挙げられ
る。The tread rubber layer is made of defective conductive rubber, and a conductive tape 9 made of conductive rubber is vulcanized and bonded as a conductive rubber layer to land portions and grooves on the tread surface. Is bonded to a conductive rubber member inside the tire, for example, a belt layer. Here, the conductive rubber is a rubber having a volume resistivity of less than 10 7 Ω · cm, and a rubber containing 40 to 100 parts by weight of carbon rubber as a compounding component in rubber components such as natural rubber and diene rubber. The conductive rubber refers to a rubber having a volume resistivity of 10 7 Ω · cm or more, and includes a rubber containing silica at a high ratio.
【００１３】本実施形態のタイヤは、図２に示すように
未加硫のトレッドゴム１１をタイヤサイズに合わせて所
定長さに切断した後、トレッド外側表面１２に長さ方向
に導電性テープが貼り付けられ、その一端１３はタイヤ
成型時にトレッドの内側のベルト層に接合され未加硫タ
イヤとして作製された後、加硫されタイヤとして完成さ
れる。なお、加硫工程にてトレッド接地部に前記の溝が
形成され溝部分にも導電性ゴム層が形成される。In the tire of the present embodiment, as shown in FIG. 2, after the unvulcanized tread rubber 11 is cut into a predetermined length according to the tire size, a conductive tape is applied to the tread outer surface 12 in the length direction. The one end 13 is attached to a belt layer inside the tread at the time of molding the tire to produce an unvulcanized tire, and then vulcanized to complete the tire. In the vulcanization step, the above-mentioned groove is formed in the tread ground contact portion, and the conductive rubber layer is also formed in the groove portion.
【００１４】導電テープは幅が１０ｍｍ〜４０ｍｍ，厚
みが０．２ｍｍ〜０．５ｍｍであることが好ましい。幅
が１０ｍｍ未満ではテープを貼る作業性や貼り付け精度
が低下し、またトレッドパターンの溝部に導電性ゴム層
が形成される機会が減少しアース機能が不安定であり、
４０ｍｍを超えるとトレッドゴムが有す本来目的の特性
の初期性能が発揮されない。厚みが０．２ｍｍ未満では
テープ貼りの作業性、精度が低下し、０．５ｍｍを超え
るとトレッド両端の接合部に段差が生じ貼り合わせ部分
に空間が発生しやすい。The conductive tape preferably has a width of 10 mm to 40 mm and a thickness of 0.2 mm to 0.5 mm. If the width is less than 10 mm, the workability of applying the tape and the accuracy of applying the tape are reduced, and the opportunity for forming the conductive rubber layer in the groove of the tread pattern is reduced, and the ground function is unstable,
If it exceeds 40 mm, the initial performance of the originally intended characteristics of the tread rubber is not exhibited. If the thickness is less than 0.2 mm, the workability and accuracy of the tape application will decrease, and if it exceeds 0.5 mm, a step will be formed at the joining portion at both ends of the tread, and a space is likely to be generated at the bonding portion.
【００１５】次に図３は、ベルト層の外側に配置された
トレッドゴム層１２が、不良導電性ゴムからなる外側ト
レッドゴム層１４と導電性ゴムからなる内側トレッドゴ
ム層１５からなるキャップ／ベース構造で構成された、
未加硫ゴムからなる押出し成形されたキャップ／ベース
２層構造のトレッドゴムの断面図を示す。前記１層のト
レッドゴム層の場合と同様にタイヤサイズに合わせ所定
長さに切断した後、トレッド周長より長い導電性ゴムか
らなる導電テープ９をキャップトレッドゴム外側表面の
長さ方向貼り付け、テープの一端１６を図に示すように
該トレッドゴムのベーストレッドゴム層の切断端面に貼
り合わせた後、未加硫タイヤ成型時にベルト層の外側に
トレッドゴムを貼り合わせ、前記導電テープがキャップ
トレッドゴム層表面からベーストレッドゴム層に接合す
るように貼り付け成型した後、加硫を行いタイヤを得
る。Next, FIG. 3 shows that the tread rubber layer 12 disposed outside the belt layer has a cap / base comprising an outer tread rubber layer 14 made of defective conductive rubber and an inner tread rubber layer 15 made of conductive rubber. Structured,
1 shows a cross-sectional view of an extruded cap / base two-layer tread rubber made of unvulcanized rubber. After cutting to a predetermined length according to the tire size in the same manner as in the case of the one tread rubber layer, a conductive tape 9 made of conductive rubber longer than the tread circumference is attached in the length direction of the outer surface of the cap tread rubber, After attaching one end 16 of the tape to the cut end surface of the base tread rubber layer of the tread rubber as shown in the figure, the tread rubber is attached to the outside of the belt layer at the time of molding the unvulcanized tire, and the conductive tape is used as the cap tread. After sticking and molding so as to be joined to the base tread rubber layer from the rubber layer surface, vulcanization is performed to obtain a tire.
【００１６】[0016]
【実施例】以下に、本発明を実施例に基ずき説明する。
表１に示す組成（重量部、以下部と略す）を有す４種類
のゴム組成物Ａ〜Ｄを配合した。表１中、ＳＢＲはＪＳ
Ｒ製のＳＢＲ１５０２、ＢＲは宇部興産製のＢＲ１５０
Ｂ、カーボンブラックＨＡＦは東海カーボン製のシース
ト３、同ＦＥＦは昭和キャボット製のＮ５５０、シリカ
は日本シリカ工業製のニップシールＡＱ、シランカップ
リング剤はデグッサ社製のＳｉ−６９を用いた。なお、
共通の配合剤としてワックス２部、老化防止剤（６Ｃ）
２部、ステアリン酸３部、亜鉛華３部、硫黄２部、加硫
促進剤（ＮＳ）１．５部を用いた。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
Four types of rubber compositions A to D having the compositions shown in Table 1 (parts by weight, abbreviated as "parts" hereinafter) were compounded. In Table 1, SBR is JS
SBR1502 made by R, BR is BR150 made by Ube Industries
B, carbon black HAF used was Toast Carbon Seast 3, Nippon Silica Kogyo Nipseal AQ was used for the FEF, Nippon Silica Nippseal AQ was used for the silica, and Si-69 manufactured by Degussa was used for the silane coupling agent. In addition,
2 parts of wax as common compounding agent, antioxidant (6C)
2 parts, 3 parts of stearic acid, 3 parts of zinc white, 2 parts of sulfur, and 1.5 parts of a vulcanization accelerator (NS) were used.
【００１７】[0017]
【表１】 [Table 1]
【００１８】トレッドゴム層が単独配合からなる図２の
構造で表１の配合Ａを用い、またトレッドゴム層が２層
からなる図３のキャップ／ベース構造で表１の配合Ａを
キャップ層に、配合Ｂをベース層にそれぞれ用い、導電
テープを備えたサイズ１９５／６５Ｒ１５の試作タイヤ
実１、２を作製した。また、導電テープの寸法を変えた
比１〜４も図３の構造で同時に作製した。なお、導電テ
ープは表１の配合Ｃ、サイドウォールは配合Ｄを用い各
試作タイヤで共通とした。比５は導電テープを備えず、
従来品は単独トレッド層にカーボンブラックを配合した
導電性ゴム配合Ｂを使用している。The composition A shown in Table 1 is used in the structure of FIG. 2 in which the tread rubber layer is composed solely, and the composition A in Table 1 is used in the cap / base structure in FIG. 3 in which the tread rubber layer is composed of two layers. And Formulation B as base layers, respectively, to produce prototype tires 1 and 2 each having a size of 195 / 65R15 and a conductive tape. In addition, ratios 1 to 4 in which the dimensions of the conductive tape were changed were simultaneously manufactured with the structure of FIG. It should be noted that the conductive tape was used in Formula C of Table 1 and the sidewalls were used in Formula D, which were common to each prototype tire. Ratio 5 has no conductive tape,
The conventional product uses a conductive rubber compound B in which carbon black is compounded in a single tread layer.
【００１９】各試作タイヤを下記の方法で評価し、結果
を表２に示した。ここで初期性能は新品時、摩耗後はト
レッド表面を２ｍｍバフ掛けしトレッド陸部の導電テー
プ層を除去したものである。 通電性：タイヤを１５×６ １／２Ｊのアルミホイール
に組み付け、内圧２Ｋｇ／ｃｍ２とし、タイヤを鉄板上
に荷重４００Ｋｇで押し付け、鉄板とホイール間に２０
０Ｖの電圧をかけて通電の有無をタイヤ周上６ヵ所につ
いて測定した。評価○は６ヵ所共に通電、△は６ヵ所の
内で不通電部があり、×は６ヵ所全て不通電であった。 転がり抵抗：内圧２Ｋｇ／ｃｍ２、荷重４００Ｋｇの条
件で室内ドラム試験機を用い、速度６０Ｋｍ／ｈ時の転
がり抵抗を測定し従来品を１００とした指数で表した。
数値の小さいものが良い。 湿潤摩擦性能：米国のタイヤ等級格付け基準ＵＴＱＧＳ
に従って湿潤アスファルト路面でのトラクション係数を
求め、従来品を１００とした指数で表わした。値が大き
いほど好ましい。 テープ貼り付け精度：タイヤ成型時に導電テープが伸び
て厚み、幅に変動が発生した、また貼り付けが蛇行した
等の加工性で評価した。Each prototype tire was evaluated by the following method, and the results are shown in Table 2. Here, the initial performance is that when the tread surface is new, and after abrasion, the tread surface is buffed by 2 mm to remove the conductive tape layer on the tread land portion. Conductivity: The tire is assembled on an aluminum wheel of 15 × 6 1/2 J, the internal pressure is set to 2 kg / cm 2 , the tire is pressed on an iron plate with a load of 400 kg, and 20 between the iron plate and the wheel.
By applying a voltage of 0 V, the presence or absence of energization was measured at six locations on the tire circumference. In the evaluation は, the current was applied to all six places, and for Δ, there were non-conductive parts among the six places. Rolling resistance: The rolling resistance at a speed of 60 Km / h was measured using an indoor drum tester under the conditions of an internal pressure of 2 kg / cm 2 and a load of 400 kg, and was expressed as an index with the conventional product being 100.
The one with small numerical value is good. Wet friction performance: US tire grade rating standard UTQGS
The traction coefficient on a wet asphalt road surface was calculated according to the following formula, and expressed as an index with the conventional product as 100. The larger the value, the better. Tape sticking accuracy: Evaluation was made based on workability such as the conductive tape being stretched during tire molding, causing variations in thickness and width, and sticking being meandering.
【００２０】[0020]
【表２】 [Table 2]
【００２１】実１は導電性ゴムからなる導電ゴム層がト
レッド表面からタイヤ内部の導電部材であるベルト層に
接合され、実２は導電ゴム層が導電性ゴムからなるベー
ストレッドゴム層に接合されており良好なアース性能を
有し、かつ摩耗後も溝部に形成された導電層が確実に残
りアース性能を損なわなず、低転がり抵抗性に優れた空
気入りタイヤを簡単かつ確実に製造することができる。[0021] In the first case, a conductive rubber layer made of a conductive rubber is joined from the tread surface to a belt layer as a conductive member inside the tire, and in the second case, the conductive rubber layer is joined to a base tread rubber layer made of a conductive rubber. Easy and reliable manufacturing of pneumatic tires that have good grounding performance, have a conductive layer formed in the groove even after abrasion and do not impair the grounding performance, and have excellent low rolling resistance. Can be.
【００２２】比１はテープ厚みが薄く、比３はテープ幅
が狭すぎるためトレッド表面にテープを貼り付ける作業
性が劣り、その結果テープの貼り付け精度が悪くなりト
レッド溝部の導電ゴム層形成が不完全となって摩耗後の
アース性能が満足できない。比２はテープ厚みが厚いた
め、タイヤ成型時にトレッド両端の貼り合わせ部に段差
が生じ加硫後タイヤに空気溜りが発生しタイヤ耐久性能
に問題があり、初期転がり抵抗性能もやや劣る。比４は
テープ幅が広いため初期段階においてシリカ配合トレッ
ドの特性が発揮されず初期湿潤摩擦性能が不充分であ
る。比５は導電テープを用いずアース性能は持たない。In the case of ratio 1, the tape thickness is thin, and in the case of ratio 3, the tape width is too narrow, so that the workability of attaching the tape to the tread surface is inferior. As a result, the tape attaching accuracy is deteriorated, and the formation of the conductive rubber layer in the tread groove portion becomes difficult. Imperfect and poor grounding performance after wear. In the case of the ratio 2, since the tape thickness is large, a step is generated in the bonded portion at both ends of the tread during tire molding, and air is generated in the tire after vulcanization, so that there is a problem in tire durability performance, and the initial rolling resistance performance is slightly inferior. In the ratio 4, since the tape width is wide, the characteristics of the silica-containing tread are not exhibited in the initial stage, and the initial wet friction performance is insufficient. The ratio 5 does not use the conductive tape and has no grounding performance.
【００２３】[0023]
【発明の効果】以上説明したように、本発明によれば除
電機能付き空気入りタイヤを簡単かつ確実に製造するこ
とができる。As described above, according to the present invention, a pneumatic tire with a static elimination function can be manufactured simply and reliably.
【図１】本発明による空気入りタイヤの右半分断面図で
ある。FIG. 1 is a right half sectional view of a pneumatic tire according to the present invention.
【図２】１層からなるトレッドゴム表面に導電テープを
貼り付けた未加硫トレッドゴムの斜視図である。FIG. 2 is a perspective view of an unvulcanized tread rubber in which a conductive tape is attached to the surface of a tread rubber composed of one layer.
【図３】２層からなるトレッドゴム表面に導電テープを
貼り付けた未加硫トレッドゴムの斜視図である。FIG. 3 is a perspective view of an unvulcanized tread rubber in which a conductive tape is attached to a tread rubber surface having two layers.
１ 空気入りタイヤ ２ ビードコア ３ カーカス層 ４ ベルト層 ５ サイドウォール ６ トレッド ７ 周方向溝 ９ 導電テープ １２ トレッドゴム １４ 外側トレッドゴム層 １５ 内側トレッドゴム層 DESCRIPTION OF SYMBOLS 1 Pneumatic tire 2 Bead core 3 Carcass layer 4 Belt layer 5 Side wall 6 Tread 7 Circumferential groove 9 Conductive tape 12 Tread rubber 14 Outer tread rubber layer 15 Inner tread rubber layer
Claims (3)
ムからなるトレッドゴム層内に、トレッド表面からベル
ト層まで延びた導電性ゴムからなる導電体を設けて、静
電気を車両からタイヤを通じて路面にアースする除電機
能付き空気入りタイヤの製造方法であって、未加硫ゴム
からなる押出し成形された帯状トレッドゴムをタイヤ外
周長に合わせ切断した後、トレッド周長より長い導電性
ゴムからなる導電テープを該トレッドゴム外周面の長さ
方向の一端に合わせ、他方をトレッドのもう一方の切断
端面に接合させ貼り合わせ、未加硫タイヤ成型時にベル
ト層の外周に沿い該トレッドゴムの一端から他端にかけ
て貼り合わせる時に前記導電テープがベルト層に接する
ように貼り付け成型した後、加硫を行って前記導電テー
プが導電体となり静電気を路面にアースされることを特
徴とした除電機能付き空気入りタイヤの製造方法。A tread rubber layer made of defective conductive rubber disposed outside a belt layer is provided with a conductor made of conductive rubber extending from the tread surface to the belt layer, so that static electricity is transmitted from a vehicle through a tire. A method for manufacturing a pneumatic tire with a static elimination function grounded to a road surface, comprising cutting an extruded belt-shaped tread rubber made of unvulcanized rubber according to the tire outer peripheral length, and then comprising a conductive rubber longer than the tread peripheral length. A conductive tape is aligned with one end in the length direction of the outer peripheral surface of the tread rubber, and the other is joined and bonded to the other cut end surface of the tread, from one end of the tread rubber along the outer periphery of the belt layer at the time of molding an uncured tire. After pasting and molding so that the conductive tape is in contact with the belt layer when pasting over the other end, vulcanization is performed so that the conductive tape becomes a conductor. Method for producing a static eliminating function pneumatic tire characterized in that it is grounded electricity to the road surface.
層が、不良導電性ゴムからなる外側トレッドゴム層と導
電性ゴムからなる内側トレッドゴム層からなるキャップ
／ベース構造で構成され、キャップトレッドゴム層表面
からベーストレッドゴム層まで延びた導電性ゴムからな
る導電体を設けて、静電気を車両からタイヤを通じて路
面にアースする除電機能付き空気入りタイヤの製造方法
であって、未加硫ゴムからなる押出し成形されたキャッ
プ／ベース２層のトレッドゴムが接合された帯状トレッ
ドゴムをタイヤ外周長に合わせ切断した後、トレッド周
長より長い導電性ゴムからなる導電テープを該キャップ
トレッドゴム外周面の長さ方向の一端に合わせ、他方を
該トレッドゴムのもう一方のベーストレッドゴム層切断
端面に接合させ貼り合わせ、加硫を行って前記導電テー
プが導電体となり静電気を路面にアースされることを特
徴とした除電機能付き空気入りタイヤの製造方法。2. The cap tread according to claim 2, wherein the tread rubber layer disposed outside the belt layer has a cap / base structure comprising an outer tread rubber layer made of defective conductive rubber and an inner tread rubber layer made of conductive rubber. A method for manufacturing a pneumatic tire with a static elimination function of providing a conductor made of conductive rubber extending from a rubber layer surface to a base tread rubber layer, and grounding static electricity from a vehicle to a road surface through a tire, comprising: After the strip-shaped tread rubber to which the two-layer extruded cap / base tread rubber is bonded is cut in accordance with the tire outer circumferential length, a conductive tape made of conductive rubber longer than the tread circumferential length is applied to the cap tread rubber outer circumferential surface. Attach it to one end in the length direction and join the other to the cut end face of the other base tread rubber layer of the tread rubber. The combined method of static eliminating function pneumatic tire characterized in that the conductive tape by performing vulcanization is grounded electrostatic becomes conductive to the road surface.
厚みが０．２ｍｍ〜０．５ｍｍである請求項１または２
記載の除電機能付き空気入りタイヤの製造方法。3. The conductive tape has a width of 10 mm to 40 mm,
The thickness is 0.2 mm to 0.5 mm.
The manufacturing method of the pneumatic tire with a static elimination function described in the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11121869A JP2000313072A (en) | 1999-04-28 | 1999-04-28 | Manufacture of pneumatic tire with static elimination function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11121869A JP2000313072A (en) | 1999-04-28 | 1999-04-28 | Manufacture of pneumatic tire with static elimination function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000313072A true JP2000313072A (en) | 2000-11-14 |
Family
ID=14821952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11121869A Pending JP2000313072A (en) | 1999-04-28 | 1999-04-28 | Manufacture of pneumatic tire with static elimination function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000313072A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001114943A (en) * | 1999-09-16 | 2001-04-24 | Goodyear Tire & Rubber Co:The | Electrically conductive rubber composition, and product including tire having its member |
| WO2005007424A1 (en) * | 2003-07-16 | 2005-01-27 | Bridgestone Corporation | Tire and tire producing method |
| JP2011525453A (en) * | 2008-06-25 | 2011-09-22 | ソシエテ ド テクノロジー ミシュラン | Tire having non-conductive compound and charge flow path |
| JP2012143993A (en) * | 2011-01-13 | 2012-08-02 | Toyo Tire & Rubber Co Ltd | Method of manufacturing pneumatic tire, and pneumatic tire |
| JP2015013633A (en) * | 2013-07-08 | 2015-01-22 | 東洋ゴム工業株式会社 | Pneumatic tire |
| JP2017500249A (en) * | 2013-12-19 | 2017-01-05 | ブリヂストン アメリカズ タイヤ オペレーションズ、 エルエルシー | Tire with electrostatic discharge element |
| CN110072711A (en) * | 2016-12-16 | 2019-07-30 | 米其林企业总公司 | The tire for keeping it conductive and wherein placing local conductive bar |
-
1999
- 1999-04-28 JP JP11121869A patent/JP2000313072A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001114943A (en) * | 1999-09-16 | 2001-04-24 | Goodyear Tire & Rubber Co:The | Electrically conductive rubber composition, and product including tire having its member |
| JP4714327B2 (en) * | 1999-09-16 | 2011-06-29 | ザ・グッドイヤー・タイヤ・アンド・ラバー・カンパニー | Conductive rubber composition and product including tire having the member |
| WO2005007424A1 (en) * | 2003-07-16 | 2005-01-27 | Bridgestone Corporation | Tire and tire producing method |
| JP2005035337A (en) * | 2003-07-16 | 2005-02-10 | Bridgestone Corp | Tire and its manufacturing method |
| US7766060B2 (en) | 2003-07-16 | 2010-08-03 | Bridgestone Corporation | Tire and tire producing method |
| JP4547136B2 (en) * | 2003-07-16 | 2010-09-22 | 株式会社ブリヂストン | Tire and tire manufacturing method |
| JP2011525453A (en) * | 2008-06-25 | 2011-09-22 | ソシエテ ド テクノロジー ミシュラン | Tire having non-conductive compound and charge flow path |
| JP2012143993A (en) * | 2011-01-13 | 2012-08-02 | Toyo Tire & Rubber Co Ltd | Method of manufacturing pneumatic tire, and pneumatic tire |
| JP2015013633A (en) * | 2013-07-08 | 2015-01-22 | 東洋ゴム工業株式会社 | Pneumatic tire |
| JP2017500249A (en) * | 2013-12-19 | 2017-01-05 | ブリヂストン アメリカズ タイヤ オペレーションズ、 エルエルシー | Tire with electrostatic discharge element |
| US10336141B2 (en) | 2013-12-19 | 2019-07-02 | Bridgestone Americas Tire Operations, Llc | Tire having static charge dissipation element |
| CN110072711A (en) * | 2016-12-16 | 2019-07-30 | 米其林企业总公司 | The tire for keeping it conductive and wherein placing local conductive bar |
| CN110072711B (en) * | 2016-12-16 | 2021-05-18 | 米其林企业总公司 | Tyre made conductive by placing local conductive strips therein |
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