JP2009133017A - Reinforcing material for rubber article and tire using the same - Google Patents

Reinforcing material for rubber article and tire using the same Download PDF

Info

Publication number
JP2009133017A
JP2009133017A JP2007308215A JP2007308215A JP2009133017A JP 2009133017 A JP2009133017 A JP 2009133017A JP 2007308215 A JP2007308215 A JP 2007308215A JP 2007308215 A JP2007308215 A JP 2007308215A JP 2009133017 A JP2009133017 A JP 2009133017A
Authority
JP
Japan
Prior art keywords
total
reinforcing material
tire
rubber
wire
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
JP2007308215A
Other languages
Japanese (ja)
Other versions
JP5196533B2 (en
Inventor
Kiyoshi Ikehara
清 池原
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 JP2007308215A priority Critical patent/JP5196533B2/en
Publication of JP2009133017A publication Critical patent/JP2009133017A/en
Application granted granted Critical
Publication of JP5196533B2 publication Critical patent/JP5196533B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/0613—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the rope configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/10—Rope or cable structures
    • D07B2201/1004—General structure or appearance
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2021—Strands characterised by their longitudinal shape
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2048—Cores characterised by their cross-sectional shape
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D07B2201/2061—Cores characterised by their structure comprising wires resulting in a twisted structure

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing material for rubber articles, which can ensure extensibility (stretchability) on productive processing, can enhance stiffness in the circumferential direction, especially when applied to tire, and does not cause other problems such as increase in the weight of the tire, and to provide a tire using the same. <P>SOLUTION: This reinforcing material for the rubber articles, comprising a core cord material 1 and four or more wound cord materials 2 wound on the core cord material 1, is characterized in that the core cord material 1 has a breaking elongation of ≥3%; each of the wound cord materials 2 is a strand prepared by twisting plural metal wires; the maximum value G<SB>max</SB>of a distance between the adjacent wound strands 2 and the total amount G<SB>total</SB>satisfy the following expression: G<SB>max</SB>≤G<SB>total</SB>/2, and the total amount G<SB>total</SB>of distances between the adjacent strands 2 satisfies the following expression: G'<SB>total</SB>≥4×d before processed or in a state that the reinforcing materials are taken out from the rubber article, when the average diameter d of the circumcircles of the strands 2 is d. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、ゴム物品用補強材（以下、単に「補強材」とも称する）およびそれを用いたタイヤに関し、詳しくは、タイヤをはじめとする各種ゴム物品に好適に適用可能なゴム物品用補強材およびそれを用いたタイヤに関する。   TECHNICAL FIELD The present invention relates to a rubber article reinforcing material (hereinafter, also simply referred to as “reinforcing material”) and a tire using the same, and more specifically, a rubber article reinforcing material that can be suitably applied to various rubber articles including tires. And a tire using the same.

従来より、タイヤやホースなどのような円管状のゴム物品において、その円管周方向の剛性や強度を補強するために、繊維材料が使用されている。例えば、空気入りタイヤのクラウン部分には、繊維で補強されたベルト層が配置されており、これにより、タイヤが高速回転した際に働く遠心力でタイヤのクラウン部分がせり出すことを防止したり、長期間の走行により除々に外周が大きくなって溝底にクラックが発生するのを防止するなどによって、タイヤ耐久性を向上させている。また、コーナリングの際には、タイヤ周方向の剛性がベルトの面内剛性にも寄与し、横力発揮に寄与している。   Conventionally, fiber materials have been used to reinforce the rigidity and strength in the circumferential direction of a tubular rubber article such as a tire or a hose. For example, a belt layer reinforced with fibers is disposed on the crown portion of the pneumatic tire, thereby preventing the crown portion of the tire from protruding by the centrifugal force that acts when the tire rotates at a high speed, The tire durability is improved by preventing the outer circumference from gradually increasing due to long-term running and cracking at the groove bottom. In cornering, the rigidity in the tire circumferential direction also contributes to the in-plane rigidity of the belt, contributing to the lateral force.

ベルト層として、コード方向が互いに交錯するベルト層を、そのコード角度をタイヤ周方向に向けて配置することで、周方向剛性を高めることは可能であるが、さらなる周方向剛性を得るために、タイヤ周方向に新たな補強層を設けることもある（例えば、特許文献１等）。
特開２００７−１３７１９９号公報（特許請求の範囲等） As a belt layer, it is possible to increase the circumferential rigidity by arranging the belt layers in which the cord directions intersect with each other with the cord angle facing the tire circumferential direction, but in order to obtain further circumferential rigidity, A new reinforcing layer may be provided in the tire circumferential direction (for example, Patent Document 1).
JP 2007-137199 A (Claims etc.)

しかしながら、上記のように、補強線材を高角度で設置したり、タイヤ周方向に別途設けると、タイヤ周方向の剛性は得られるものの、タイヤ製造工程での作業性や歩留まりは悪化することになる。   However, as described above, if the reinforcing wire is installed at a high angle or provided separately in the tire circumferential direction, the rigidity in the tire circumferential direction can be obtained, but the workability and the yield in the tire manufacturing process are deteriorated. .

これに対し、複撚りのＨＥ（Ｈｉｇｈ Ｅｌｏｎｇａｔｉｏｎ）コードや、波形に型付けしたコードをタイヤ周方向に螺旋巻きしたコード層が提案されているが、この場合、製造工程での作業性は改善されるものの、一方で剛性が低下してしまう。そのため、充分な剛性を得るためには、通常のスチールコードより多くの量を巻きつけなければならず、製品の重量が増大するという問題があった。   On the other hand, a double twisted HE (High Elongation) cord or a cord layer in which a cord shaped into a waveform is spirally wound in the tire circumferential direction has been proposed, but in this case, workability in the manufacturing process is improved. However, on the other hand, the rigidity decreases. Therefore, in order to obtain sufficient rigidity, a larger amount than the usual steel cord has to be wound, and there is a problem that the weight of the product increases.

そこで本発明の目的は、上記問題を解消して、製造加工時における伸張性（伸縮性）を確保しつつ、特にタイヤに適用した際に周方向剛性を高めることが可能であって、タイヤの重量増等の他の問題を生ずることがないゴム物品用補強材およびそれを用いたタイヤを提供することにある。   Accordingly, an object of the present invention is to solve the above-mentioned problems and to ensure the extensibility (stretchability) at the time of manufacturing and to increase the circumferential rigidity particularly when applied to a tire. An object of the present invention is to provide a reinforcing material for rubber articles that does not cause other problems such as weight increase and a tire using the same.

本発明者は鋭意検討した結果、下記構成とすることにより上記課題を解決できることを見出して、本発明を完成するに至った。   As a result of intensive studies, the present inventor has found that the above problem can be solved by adopting the following configuration, and has completed the present invention.

すなわち、本発明のゴム物品用補強材は、芯線材と、該芯線材の周りに巻き付けられた４本以上の巻付け線材とからなるゴム物品用補強材において、
前記芯線材が３％以上の切断伸びを有し、前記巻付け線材が金属線材を複数本撚り合わせてなるストランドであり、隣接する該ストランド間の距離の最大値Ｇｍａｘおよびその総和Ｇｔｏｔａｌが、ゴム物品中で、下記式、
Ｇｍａｘ≦Ｇｔｏｔａｌ／２
で示される関係を満足し、かつ、加工前またはゴム物品から取り出してゴムを除去した状態での、隣接する該ストランド間の距離の総和Ｇｔｏｔａｌが、前記ストランドの外接円の平均直径をｄとしたとき、下記式、
Ｇ’ｔｏｔａｌ≧４×ｄ
で示される関係を満足することを特徴とするものである。 That is, the reinforcing material for rubber articles of the present invention is a reinforcing material for rubber articles comprising a core wire material and four or more wound wire materials wound around the core wire material,
The core wire has a cut elongation of 3% or more, the wound wire is a strand formed by twisting a plurality of metal wires, and the maximum value G max of the distance between adjacent strands and the total G total are In the rubber article, the following formula:
G max ≦ G total / 2
And the total distance G total between the adjacent strands before processing or in a state where the rubber is removed from the rubber article and the average diameter of the circumscribed circle of the strand is d. When the following formula,
G ′ total ≧ 4 × d
It is characterized by satisfying the relationship indicated by.

本発明の補強材においては、前記芯線材の１．５％伸張時における張力が、破断荷重の１／３以下であることが好ましい。また、前記芯線材が金属線材であることが好ましく、この場合、好適には、前記金属線材がスチールからなる。さらに、本発明においては、前記芯線材が、波形若しくは螺旋状に型付けされた１本の線材からなるか、または、波形若しくは螺旋状に型付けされた複数本の線材を撚り合わせずに束ねてなることが好ましい。   In the reinforcing material of the present invention, it is preferable that the tension at 1.5% elongation of the core wire material is 1/3 or less of the breaking load. The core wire is preferably a metal wire. In this case, the metal wire is preferably made of steel. Furthermore, in the present invention, the core wire is made of one wire shaped like a waveform or a spiral, or a plurality of wires shaped like a waveform or a spiral are bundled without being twisted together. It is preferable.

また、本発明のタイヤは、上記本発明のゴム物品用補強材を用いた補強層が、周方向に少なくとも１層配設されていることを特徴とするものである。   The tire of the present invention is characterized in that at least one reinforcing layer using the rubber article reinforcing material of the present invention is disposed in the circumferential direction.

本発明によれば、上記構成としたことにより、加硫前の製造加工時における良好な伸張性（伸縮性）を確保しつつ、加硫後には高剛性となって、特にタイヤに適用した際に周方向剛性を高めることが可能なゴム物品用補強材およびそれを用いたタイヤを実現することが可能となった。   According to the present invention, the above configuration ensures high extensibility (stretchability) at the time of manufacturing and processing before vulcanization, and becomes high rigidity after vulcanization, particularly when applied to a tire. In addition, it is possible to realize a reinforcing material for rubber articles and a tire using the same, which can increase circumferential rigidity.

以下、本発明の好適実施形態について、図面を参照しつつ詳細に説明する。
図１に、本発明の一好適例に係るゴム物品用補強材の幅方向断面図を示す。図示するように、本発明のゴム物品用補強材は、芯線材１と、その周りに巻き付けられた４本以上、図示例では６本の巻付け線材２とからなる。 DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view in the width direction of a rubber article reinforcing material according to a preferred embodiment of the present invention. As shown in the figure, the reinforcing material for rubber articles of the present invention comprises a core wire 1 and four or more wound wires 2 wound around the core wire 1, and six wound wires 2 in the illustrated example.

本発明のゴム物品用補強材においては、芯線材１として、３％以上の切断伸びを有するものを用いることが必要である。芯線材１の切断伸びは、好適には４％以上、例えば、４〜１５％とする。これにより、補強材をゴム物品に適用する際の成型加硫加工時において、補強材の伸縮性を確保することができ、作業性が確保される。芯線材１の切断伸びが３％未満であると、特に、タイヤの加圧加硫工程におけるモールドフィットが悪化し、トレッドの加硫不良を起こす場合がある。   In the reinforcing material for rubber articles of the present invention, it is necessary to use a core wire material 1 having a cut elongation of 3% or more. The cut elongation of the core wire 1 is preferably 4% or more, for example, 4 to 15%. Thereby, at the time of the molding vulcanization process when applying the reinforcing material to the rubber article, the elasticity of the reinforcing material can be ensured and workability is ensured. When the cut elongation of the core wire 1 is less than 3%, the mold fit in the pressure vulcanization process of the tire is particularly deteriorated, and the tread may be poorly vulcanized.

また、本発明の補強材においては、図示するように、巻付け線材２が金属線材３を複数本撚り合わせてなるストランドであり、隣接するストランド間の距離の最大値Ｇｍａｘおよびその総和Ｇｔｏｔａｌが、ゴム物品中で、下記式、
Ｇｍａｘ≦Ｇｔｏｔａｌ／２
で示される関係を満足することが必要である。Ｇｍａｘ＞Ｇｔｏｔａｌ／２では、コード内部にゴムが閉じ込められず、伸張時にバネのような変形をして、十分な剛性が得られなくなる。ここで、隣接する巻付け線材（ストランド）２間の距離とは、隣接する巻付け線材２の外周円間の最短距離（図中のＧ１〜Ｇ５およびＧｍａｘ）である。この距離は、具体的には、ゴム物品を、補強繊維の垂直方向に切断して、補強材断面が観察できるように研磨した後、顕微鏡で拡大し、図１に示すように隣接する巻付け線材間の距離を測定することにより得られる。また、「ゴム物品中で」とは、補強材をゴム物品中に埋設して加硫した後の製品の中での状態を意味し、加工により引っ張られたりすると補強材の断面形状が変化するので、ゴム等に拘束されず、コードに負荷がかかっていない状態を規定したものである。さらに、巻付け線材２の外接円直径として平均値を用いているのは、様々な直径のものが混在している可能性もあるため、より厳密に平均値としたものである。 Further, in the reinforcing material of the present invention, as shown in the drawing, the wound wire 2 is a strand formed by twisting a plurality of metal wires 3, and the maximum value G max of the distance between adjacent strands and the total G total In the rubber article, the following formula:
G max ≦ G total / 2
It is necessary to satisfy the relationship indicated by. When G max > G total / 2, the rubber is not confined inside the cord, and it deforms like a spring when stretched, so that sufficient rigidity cannot be obtained. Here, the distance between adjacent winding wires (strands) 2 is the shortest distance between the outer circumferences of adjacent winding wires 2 (G 1 to G 5 and Gmax in the figure). Specifically, the rubber article is cut in the vertical direction of the reinforcing fiber, polished so that the cross section of the reinforcing material can be observed, then magnified with a microscope, and adjacent windings as shown in FIG. It is obtained by measuring the distance between wires. “In a rubber article” means a state in a product after a reinforcing material is embedded in a rubber article and vulcanized, and the cross-sectional shape of the reinforcing material changes when pulled by processing. Therefore, it is defined that the cord is not constrained by rubber or the like and no load is applied to the cord. Further, the reason why the average value is used as the circumscribed circle diameter of the wound wire 2 is that the average value is more strictly determined because there is a possibility that various diameters are mixed.

さらに、本発明においては、加工前またはゴム物品から取り出してゴムを除去した状態での、隣接するストランド間の距離の総和Ｇ’ｔｏｔａｌが、ストランドの外接円の平均直径をｄとしたとき、下記式、
Ｇ’ｔｏｔａｌ≧４×ｄ
で示される関係を満足することが必要である。Ｇ’ｔｏｔａｌ＜４×ｄであると、伸張されたときに巻付け線材同士が接触して、伸張性がなくなり、作業性が悪化する。また、ゴムがコード内部に浸透しにくくなり、製品とした際にコード内部に空間ができてしまう。製品中でコード内にこのような空間があると、コードとして十分な剛性を得られなくなる。ここで、「加工前」とは、補強材をゴム物品中に埋設する前の状態を意味する。 Furthermore, in the present invention, when the sum G ′ total of the distances between adjacent strands before processing or in a state where the rubber is removed from the rubber article and the average diameter of the circumscribed circle of the strand is d, formula,
G ′ total ≧ 4 × d
It is necessary to satisfy the relationship indicated by. When G ′ total <4 × d, the wound wires come into contact with each other when stretched, the stretchability is lost, and the workability deteriorates. In addition, it is difficult for rubber to penetrate into the inside of the cord, and when the product is made, a space is created inside the cord. If there is such a space in the cord in the product, sufficient rigidity as the cord cannot be obtained. Here, “before processing” means a state before the reinforcing material is embedded in the rubber article.

本発明の補強材は、上記条件を満足するものであれば、その具体的な構造や材質等については、特に制限されるものではない。例えば、芯線材１は、図示するように、波形に型付けされた１本のストランドからなるものとする他、波形若しくは螺旋状に型付けされた１本の線材からなるか、または、波形若しくは螺旋状に型付けされた複数本の線材を撚り合わせずに束ねてなるものとすることができる。なお、本発明において、芯線材１および巻付け線材２がストランドである場合のストランドを構成する線材の本数や撚りピッチ等の撚り構造については、特に制限されるものではない。本発明の補強材としては、具体的には例えば、図１に示すような１＋ｎ構造で４≦ｎ≦９である補強材を好適に挙げることができる。   If the reinforcing material of this invention satisfies the said conditions, it will not restrict | limit in particular about the specific structure, material, etc. For example, as shown in the drawing, the core wire 1 is made of one strand shaped into a corrugated shape, or is made of one wire shaped into a corrugated shape or a spiral shape, or is corrugated or spiral shaped. It is possible to bundle a plurality of wire rods that have been molded into a shape without being twisted. In the present invention, the number of wires constituting the strand and the twist structure such as the twist pitch when the core wire 1 and the wound wire 2 are strands are not particularly limited. As the reinforcing material of the present invention, specifically, for example, a reinforcing material having a 1 + n structure as shown in FIG.

また、芯線材の材質としては、好適には金属、より好適にはスチールを用いる。芯線材を金属線材からなるものとすることで、強度および剛性を得易くなるメリットがある。特には、波形または螺旋状に型付けされた金属線材を、芯線材として用いることで、生産性を向上することができる。   Moreover, as a material of a core wire material, Preferably a metal is used, More preferably, steel is used. There exists a merit which becomes easy to acquire intensity | strength and rigidity by making a core wire material into a metal wire. In particular, productivity can be improved by using a metal wire shaped like a waveform or a spiral as a core wire.

さらに、本発明においては、芯線材１の１．５％伸張時における張力が、破断荷重の１／３以下であることが好ましい。これにより、補強材が加工工程で拡張されたときにも伸び易く、内側の部材に食い込んで接触する不良も起こしにくくなる。   Furthermore, in this invention, it is preferable that the tension | tensile_strength at the time of 1.5% expansion | extension of the core wire 1 is 1/3 or less of a breaking load. Thereby, even when the reinforcing material is expanded in the processing step, it is easy to stretch, and it is difficult to cause a defect that bites into and contacts the inner member.

本発明のタイヤは、かかる本発明のゴム物品用補強材を用いた補強層が、周方向に少なくとも１層配設されているものであり、これにより、補強層において所望の高剛性を発揮させて、周方向剛性に優れたタイヤを実現することができる。   In the tire according to the present invention, at least one reinforcing layer using the reinforcing material for a rubber article according to the present invention is disposed in the circumferential direction, whereby a desired high rigidity is exhibited in the reinforcing layer. Thus, a tire having excellent circumferential rigidity can be realized.

図２に、本発明のゴム物品用補強材を用いた本発明のタイヤの一例のトレッド部近傍の拡大部分断面図を示す。図示するタイヤ１００は、少なくとも一対のビードコア（図示せず）間に跨ってトロイド状に延在する少なくとも１層のカーカス１０１を骨格とし、その外周に、タイヤ赤道面に対し１０〜４０°の傾斜角をなし、層間で互いに赤道面を挟んで交差する複数本のコードまたはフィラメントを補強要素とする少なくとも２層の交錯ベルト１０２を有し、この交錯ベルト１０２の内周側であってカーカス１０１の外周に、上記本発明の補強材を全体としてタイヤ周方向に沿って配向させてなるストリップより形成された、少なくとも１層のクラウン強化層１０３を備えている。   FIG. 2 shows an enlarged partial cross-sectional view in the vicinity of the tread portion of an example of the tire of the present invention using the reinforcing material for rubber articles of the present invention. The illustrated tire 100 has at least one layer of a carcass 101 extending in a toroid shape between at least a pair of bead cores (not shown) as a skeleton, and the outer periphery thereof is inclined by 10 to 40 ° with respect to the tire equatorial plane. It has at least two layers of crossing belts 102 each of which has a corner and intersects with each other across the equator plane, and includes reinforcing cords or filaments as reinforcement elements. On the outer periphery, at least one crown reinforcing layer 103 formed of a strip formed by aligning the reinforcing material of the present invention as a whole along the tire circumferential direction is provided.

本発明のタイヤにおいては、かかるクラウン強化層等の周方向の補強層に、上記本発明の補強材が適用されているものであればよく、これにより本発明の所期の効果を得ることができるものであり、周方向補強層における補強材の打ち込み数や、周方向補強層以外の具体的なタイヤ構造や材質等については、常法に従い適宜設定することができ、特に制限されるものではない。   In the tire of the present invention, the reinforcing material of the present invention may be applied to the circumferential reinforcing layer such as the crown reinforcing layer, and thereby the desired effect of the present invention can be obtained. The number of reinforcements in the circumferential reinforcing layer and the specific tire structure and materials other than the circumferential reinforcing layer can be appropriately set according to a conventional method, and are not particularly limited. Absent.

以下、本発明を、実施例を用いてより詳細に説明する。
下記表１中に示す条件に従う芯線材および巻付け線材からなるゴム物品用補強材を作製し、これを、タイヤサイズ２６５／６０Ｒ２２．５のトラック用空気入りラジアルタイヤのクラウン強化層に適用して、各供試タイヤを作製した。比較例１については図４に示すタイヤ構造、実施例１については図２に示すタイヤ構造を用いた。供試タイヤはそれぞれ４本作製し、リム幅８．２５に組んで商業用トラックに装着し、内圧９００ｋＰａを充填した。 Hereinafter, the present invention will be described in more detail with reference to examples.
A reinforcing material for rubber articles made of a core wire and a wound wire according to the conditions shown in Table 1 below was prepared, and this was applied to the crown reinforcing layer of a pneumatic radial tire for trucks of tire size 265 / 60R22.5. Each test tire was produced. For Comparative Example 1, the tire structure shown in FIG. 4 was used, and for Example 1, the tire structure shown in FIG. 2 was used. Four test tires were prepared, assembled to a rim width of 8.25, mounted on a commercial truck, and filled with an internal pressure of 900 kPa.

その後、平均２５４８０Ｎ（２６００ｋｇｆ）の荷重を作用させた状態で、舗装高速路３０％、舗装一般路７０％の走行路を１０万ｋｍ走行させて、走行終了時の溝底のクラック発生の有無を確認した。その結果を、各供試タイヤの製造時におけるトレッドの加硫不良の有無とともに、下記の表１中に併せて示す。   Then, with a load of 25480 N (2600 kgf) on average, run 100 km on a 30 km pavement highway and 70% pavement general road to check for cracks at the bottom of the groove at the end of the run. confirmed. The results are shown together in Table 1 below together with the presence or absence of poor vulcanization of the tread during the production of each test tire.

Figure 2009133017
＊１）Ｇｍａｘ：ゴム物品中での隣接する巻付け線材間の距離の最大値である。
＊２）Ｇｔｏｔａｌ：ゴム物品中での隣接する巻付け線材間の距離の総和である。
＊３）Ｇ’ｔｏｔａｌ：ゴム物品から取り出してゴムを除去した状態での隣接する巻付け線材間の距離の総和である。
Figure 2009133017
 * 1) G max : The maximum value of the distance between adjacent wound wires in the rubber article.
* 2) G total : Total distance between adjacent wound wires in the rubber article.
* 3) G ′ total : the sum of the distances between adjacent wound wires in a state where the rubber is removed from the rubber article.

結果として、センター溝深さとショルダー溝深さとの摩耗量について、比較例のタイヤでは２ｍｍ以上の差が生じていたが、各実施例のタイヤでは１ｍｍ以内であり、実施例において偏摩耗が抑制されていることが確かめられた。したがって、本発明に係る条件を満足する実施例のタイヤにおいては、トレッドの加硫不良を生ずることなく優れた耐偏摩耗性を有するタイヤが得られることが明らかである。   As a result, the difference in wear between the center groove depth and the shoulder groove depth was 2 mm or more in the tire of the comparative example, but within 1 mm in the tire of each example, and uneven wear was suppressed in the examples. It was confirmed that Therefore, in the tire of the example satisfying the conditions according to the present invention, it is clear that a tire having excellent uneven wear resistance can be obtained without causing poor vulcanization of the tread.

本発明の一実施の形態に係るゴム物品用補強材を示す幅方向断面図である。It is width direction sectional drawing which shows the reinforcing material for rubber articles which concerns on one embodiment of this invention. 本発明の一実施の形態に係るタイヤのトレッド部近傍を示す拡大部分断面図である。1 is an enlarged partial cross-sectional view showing the vicinity of a tread portion of a tire according to an embodiment of the present invention. 本発明の他の実施の形態に係るゴム物品用補強材を示す幅方向断面図である。It is width direction sectional drawing which shows the reinforcing material for rubber articles which concerns on other embodiment of this invention. 比較例に係るタイヤのトレッド部近傍を示す拡大部分断面図である。It is an expanded fragmentary sectional view which shows the tread part vicinity of the tire which concerns on a comparative example. 比較例に係るゴム物品用補強材を示す幅方向断面図である。It is width direction sectional drawing which shows the reinforcing material for rubber articles which concerns on a comparative example.

符号の説明Explanation of symbols

１ 芯線材
２ 巻付け線材
３ 金属線材
１０１ カーカス
１０２ 交錯ベルト
１０３ クラウン強化層 DESCRIPTION OF SYMBOLS 1 Core wire 2 Winding wire 3 Metal wire 101 Carcass 102 Crossing belt 103 Crown reinforcement layer

Claims (6)

芯線材と、該芯線材の周りに巻き付けられた４本以上の巻付け線材とからなるゴム物品用補強材において、
前記芯線材が３％以上の切断伸びを有し、前記巻付け線材が金属線材を複数本撚り合わせてなるストランドであり、隣接する該ストランド間の距離の最大値Ｇｍａｘおよびその総和Ｇｔｏｔａｌが、ゴム物品中で、下記式、
Ｇｍａｘ≦Ｇｔｏｔａｌ／２
で示される関係を満足し、かつ、加工前またはゴム物品から取り出してゴムを除去した状態での、隣接する該ストランド間の距離の総和Ｇｔｏｔａｌが、前記ストランドの外接円の平均直径をｄとしたとき、下記式、
Ｇ’ｔｏｔａｌ≧４×ｄ
で示される関係を満足することを特徴とするゴム物品用補強材。 In a reinforcing material for a rubber article comprising a core wire and four or more wound wires wound around the core wire,
The core wire has a cut elongation of 3% or more, the wound wire is a strand formed by twisting a plurality of metal wires, and the maximum value G max of the distance between adjacent strands and the total G total are In the rubber article, the following formula:
G max ≦ G total / 2
And the total distance G total between the adjacent strands before processing or in a state where the rubber is removed from the rubber article and the average diameter of the circumscribed circle of the strand is d. When the following formula,
G ′ total ≧ 4 × d
A reinforcing material for rubber articles characterized by satisfying the relationship represented by: 前記芯線材の１．５％伸張時における張力が、破断荷重の１／３以下である請求項１記載のゴム物品用補強材。   The reinforcing material for rubber articles according to claim 1, wherein a tension at 1.5% elongation of the core wire material is 1/3 or less of a breaking load. 前記芯線材が金属線材である請求項１または２記載のゴム物品用補強材。   The reinforcing material for rubber articles according to claim 1 or 2, wherein the core wire is a metal wire. 前記金属線材がスチールからなる請求項３記載のゴム物品用補強材。   The reinforcing material for rubber articles according to claim 3, wherein the metal wire is made of steel. 前記芯線材が、波形若しくは螺旋状に型付けされた１本の線材からなるか、または、波形若しくは螺旋状に型付けされた複数本の線材を撚り合わせずに束ねてなる請求項１〜４のうちいずれか一項記載のゴム物品用補強材。   The said core wire consists of one wire rod shaped in a waveform or a spiral shape, or a plurality of wire rods shaped in a waveform shape or a spiral shape are bundled without twisting together. The reinforcement material for rubber articles as described in any one of Claims. 請求項１〜５のうちいずれか一項記載のゴム物品用補強材を用いた補強層が、周方向に少なくとも１層配設されていることを特徴とするタイヤ。   6. A tire, wherein at least one reinforcing layer using the rubber article reinforcing material according to claim 1 is disposed in a circumferential direction.
JP2007308215A 2007-11-29 2007-11-29 Reinforcing material for rubber article and tire using the same Expired - Fee Related JP5196533B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007308215A JP5196533B2 (en) 2007-11-29 2007-11-29 Reinforcing material for rubber article and tire using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007308215A JP5196533B2 (en) 2007-11-29 2007-11-29 Reinforcing material for rubber article and tire using the same

Publications (2)

Publication Number Publication Date
JP2009133017A true JP2009133017A (en) 2009-06-18
JP5196533B2 JP5196533B2 (en) 2013-05-15

Family

ID=40865155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007308215A Expired - Fee Related JP5196533B2 (en) 2007-11-29 2007-11-29 Reinforcing material for rubber article and tire using the same

Country Status (1)

Country Link
JP (1) JP5196533B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012076297A1 (en) * 2010-12-10 2012-06-14 Nv Bekaert Sa Multi-strand steel cord with waved core strand
CN103261512A (en) * 2010-12-10 2013-08-21 贝卡尔特公司 Multi-strand steel cord with waved core strand

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS515558Y1 (en) * 1970-08-10 1976-02-16
JPS63211389A (en) * 1987-02-27 1988-09-02 オ−ツタイヤ株式会社 Pneumatic tire
JPH06240590A (en) * 1992-12-18 1994-08-30 Bekaert Sa:Nv Steel cord
JP2006183211A (en) * 2004-12-28 2006-07-13 Bridgestone Corp Steel cord for reinforcing rubber article and tire
WO2007094222A1 (en) * 2006-02-15 2007-08-23 Bridgestone Corporation Steel cord, rubber-steel cord composite and tire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS515558Y1 (en) * 1970-08-10 1976-02-16
JPS63211389A (en) * 1987-02-27 1988-09-02 オ−ツタイヤ株式会社 Pneumatic tire
JPH06240590A (en) * 1992-12-18 1994-08-30 Bekaert Sa:Nv Steel cord
JP2006183211A (en) * 2004-12-28 2006-07-13 Bridgestone Corp Steel cord for reinforcing rubber article and tire
WO2007094222A1 (en) * 2006-02-15 2007-08-23 Bridgestone Corporation Steel cord, rubber-steel cord composite and tire

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012076297A1 (en) * 2010-12-10 2012-06-14 Nv Bekaert Sa Multi-strand steel cord with waved core strand
CN103261512A (en) * 2010-12-10 2013-08-21 贝卡尔特公司 Multi-strand steel cord with waved core strand
US8966872B2 (en) 2010-12-10 2015-03-03 Nv Bekaert Sa Multi-strand steel cord with waved core strand
CN103261512B (en) * 2010-12-10 2015-11-25 贝卡尔特公司 There is the steel wire strand cord of waveform core stock

Also Published As

Publication number Publication date
JP5196533B2 (en) 2013-05-15

Similar Documents

Publication Publication Date Title
JP4963389B2 (en) Steel cords, rubber-steel cord composites and tires
JP4940753B2 (en) Steel cord for rubber reinforcement and method for producing pneumatic radial tire using the same
JP6560677B2 (en) Steel cord for rubber article reinforcement
JP4793088B2 (en) Steel cord for rubber reinforcement and method for producing pneumatic radial tire using the same
JPH05247860A (en) Steel cord for tire and tire using the same
JP2010188780A (en) Tire for motorcycle, and method for manufacturing the same
JP2013043548A (en) Pneumatic radial tire for passenger car
JP2011042910A (en) Steel cord for reinforcing rubber article and tire produced by using the same
JP2009029310A (en) Pneumatic radial tire and manufacturing method thereof
JP5196533B2 (en) Reinforcing material for rubber article and tire using the same
JP2009248751A (en) Pneumatic radial tire
JP2007217807A (en) Steel cord, rubber-steel cord composite and tire
JP2008088613A (en) Steel cord, rubber-steel cord composite and heavy load pneumatic radial tire
JP5035982B2 (en) Reinforcing material for rubber article and tire using the same
JP2009114594A (en) Steel cord for reinforcing rubber article and tire
JP2010018942A (en) Steel cord for large-sized pneumatic radial tire
JP2009173150A (en) Radial tire
JP2009001092A (en) Tire
JP2014177225A (en) Pneumatic radial tire
JP5678558B2 (en) Pneumatic tire
JP5506487B2 (en) Steel cord and pneumatic radial tire using the same
JP2009061997A (en) Pneumatic radial tire
JP5619360B2 (en) Steel cords for reinforcing rubber articles and pneumatic tires
JP2007055389A (en) Pneumatic radial tire
JP2011143858A (en) Pneumatic radial tire

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20101101

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20120625

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120629

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120731

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20130201

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20130201

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

Free format text: PAYMENT UNTIL: 20160215

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees