JPH07229078A - Metal cord and its composite material with rubber - Google Patents
Metal cord and its composite material with rubberInfo
- Publication number
- JPH07229078A JPH07229078A JP6019476A JP1947694A JPH07229078A JP H07229078 A JPH07229078 A JP H07229078A JP 6019476 A JP6019476 A JP 6019476A JP 1947694 A JP1947694 A JP 1947694A JP H07229078 A JPH07229078 A JP H07229078A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- rubber
- cord
- filaments
- twist
- 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
-
- 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
- D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
-
- 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
- D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
- D07B1/0626—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration the reinforcing cords consisting of three core wires or filaments and at least one layer of outer wires or filaments, i.e. a 3+N configuration
-
- 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
- D07B2201/2001—Wires or filaments
- D07B2201/2006—Wires or filaments characterised by a value or range of the dimension given
-
- 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
- D07B2201/2023—Strands with core
-
- 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
- D07B2201/2024—Strands twisted
- D07B2201/2027—Compact winding
- D07B2201/2028—Compact winding having the same lay direction and lay pitch
-
- 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
- D07B2201/2051—Cores characterised by a value or range of the dimension given
-
- 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
-
- 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
- D07B2201/2095—Auxiliary components, e.g. electric conductors or light guides
- D07B2201/2097—Binding wires
- D07B2201/2098—Binding wires characterized by special properties or the arrangements of the binding wire
Landscapes
- Ropes Or Cables (AREA)
- Tires In General (AREA)
- Belt Conveyors (AREA)
- Wire Processing (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、耐斜め剪断強度特性に
優れたゴム物品補強用の金属コード（平行束ワイヤ）
と、これを補強材としてゴム中に埋設して作られたタイ
ヤ、コンベアベルト、高圧ホース等の複合物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal cord (parallel bundled wire) for reinforcing a rubber article which is excellent in diagonal shear strength resistance.
And a composite material such as a tire, a conveyor belt, a high-pressure hose, etc. made by embedding this in rubber as a reinforcing material.
【０００２】[0002]
【従来の技術】ゴム物品の補強に用いられる補強材料
は、通常、高炭素鋼線（ＪＩＳ Ｇ３５０２ピアノ線
材）を素材として、ゴムとの接着性を付与するために表
面にブラス、銅、亜鉛などの金属めっきを施し、直径
０．１〜０．５mmまで伸線加工したものを単撚り、また
は、層撚りしたものであり、自動車タイヤ、コンベアベ
ルト、高圧ホースなどの補強材として広く用いられてい
る。例えば、トラック、バス用ラジアルタイヤのベルト
部補強材として３＋６の二層撚り構造の金属コードが使
用されている。この種のゴム補強材に要求される品質特
性には、ゴムとの接着性、耐食性、並びに他の種々の機
械的性能（斜め剪断荷重、切断荷重，剛性など）があ
る。2. Description of the Related Art Reinforcing materials used to reinforce rubber articles are usually made of high carbon steel wire (JIS G3502 piano wire) and have brass, copper, zinc, etc. on the surface to provide adhesion to rubber. Is metal-plated and wire-drawn to a diameter of 0.1 to 0.5 mm, and is single-stranded or layer-twisted and widely used as a reinforcing material for automobile tires, conveyor belts, high-pressure hoses, etc. There is. For example, a metal cord having a 3 + 6 two-layer twist structure is used as a belt reinforcing material for radial tires for trucks and buses. Quality characteristics required for this type of rubber reinforcing material include adhesiveness with rubber, corrosion resistance, and various other mechanical performances (diagonal shear load, cutting load, rigidity, etc.).
【０００３】これらのうち、耐食性に関しては、ゴム中
に埋設された補強材にゴム未被覆部が存在すると、タイ
ヤが走行中に石や釘などを踏んで切り傷を受け、その傷
が補強材まで達したとき、補強材の切断荷重や耐食性が
低下する。また、補強材とゴムとの接着性が低下し、剥
離してタイヤのカットセパレーションに品質トラブルを
起こす恐れもある。Among these, regarding the corrosion resistance, when a rubber-uncovered portion is present in the reinforcing material embedded in the rubber, the tire is stepped on stones, nails, etc. while the tire is running and suffers cuts, and the scratches extend to the reinforcing material. When it reaches, the cutting load and corrosion resistance of the reinforcing material decrease. In addition, the adhesiveness between the reinforcing material and the rubber may be deteriorated and peeled off to cause quality trouble in the cut separation of the tire.
【０００４】そこで、このような腐食伝播によるカット
セパレーションを防止するために、ゴムが金属コード内
部まで十分に浸透するコード構造が考案されている。Therefore, in order to prevent such cut separation due to corrosion propagation, a cord structure in which rubber sufficiently penetrates into the metal cord has been devised.
【０００５】例えば、特開昭６３−２３５５８７号、特
開平２−１５４０８６号及び特開平５−４４１８４号公
報には、コアを３本から２本にして密閉空間をなくする
一方、ストランドはゴム浸入を容易にするためにその本
数を７〜８本にすると共にそのストランドのフィラメン
トに１００％超の率で型付けを施すことが開示されてい
る。For example, in JP-A-63-235587, JP-A-2-154086, and JP-A-5-44184, the number of cores is changed from three to two to eliminate the closed space, while the strands penetrate the rubber. It is disclosed that the number of filaments is set to 7 to 8 and the filaments of the strand are imprinted at a rate of more than 100% in order to facilitate the process.
【０００６】また、特開平４−３２７２７８号公報は、
コード切断荷重を維持し、ゴム浸入を容易にするために
１×Ｎ（Ｎ≧６）単撚り構造の金属コードを提案してい
る。Further, Japanese Patent Laid-Open No. 4-327278 discloses
A metal cord having a 1 × N (N ≧ 6) single twist structure is proposed in order to maintain the cord cutting load and facilitate rubber penetration.
【０００７】[0007]
【発明が解決しようとする課題】上記の公報に示されて
いる技術は、いずれもゴム浸透を容易にして腐食伝播を
抑制することによりコード腐食による強度低下を抑制す
ることに主眼が置かれている。しかし、この種のコード
は鋭利な角を持った石などを踏んだ際、斜め剪断応力を
受け、タイヤトレッド面がカットを受ける以外にコード
を構成するフィラメントが破断する場合もある。The techniques disclosed in the above publications are all focused on suppressing the strength reduction due to cord corrosion by facilitating rubber penetration and suppressing corrosion propagation. There is. However, when this type of cord is stepped on a stone or the like having a sharp edge, diagonal shear stress may be applied, and the filaments constituting the cord may be broken in addition to the tire tread surface being cut.
【０００８】さらに、斜め剪断応力によるフィラメント
の破断を防止する目的でタイヤトレッド直下に複撚り構
造で撚りピッチの小さい４×４又は３×７構造のＨＥコ
ード（高伸長コード）を採用しているタイヤも見られる
（特開昭６２−９６１０４号）が、この構造でゴム埋設
後も高伸長を得ることは困難であり、現実にはその効果
を出すに至っていない。Further, in order to prevent the filaments from breaking due to oblique shear stress, HE cords (high elongation cords) of 4 × 4 or 3 × 7 structure having a small twist pitch with a double twist structure are adopted just below the tire tread. Tires are also seen (Japanese Patent Laid-Open No. 62-96104), but it is difficult to obtain high elongation even after burying rubber with this structure, and the effect has not been actually achieved.
【０００９】そこで、本発明は、タイヤのベルト部の補
強材として常用される３＋６の二層撚り構造コードでは
充分と云えなかった、耐食性及び耐斜め剪断強度を改良
した平行束ワイヤと、この平行束ワイヤを補強材料とし
て耐久性を向上させた、タイヤ、コンベアベルト、高圧
ホース等の複合物を提供しようとするものである。Therefore, the present invention is not sufficient with the 3 + 6 two-layer twist structure cord commonly used as a reinforcing material for a belt portion of a tire, and a parallel bundled wire having improved corrosion resistance and diagonal shear strength, and the parallel bundled wire. An object of the present invention is to provide a composite such as a tire, a conveyor belt, a high pressure hose, etc., which has improved durability by using a bundled wire as a reinforcing material.
【００１０】[0010]
【課題を解決するための手段】上記の課題を解決するた
めに開発した本発明の金属コードは、表面に金属めっき
を施したｍ本（ｍ＝６〜１５）の細径金属フィラメント
を、撚りピッチ２０mm以上で撚り合わせたこと、また、
撚りピッチＰが５０mm以上のときには、ｍ本の細径金属
フィラメントを撚り合わせたコードの外側に、表面に金
属めっきを施したｎ本（ｎ＝１〜５）の細径金属フィラ
メントを螺旋状に巻回したことを特徴とするものであ
る。MEANS FOR SOLVING THE PROBLEMS The metal cord of the present invention developed to solve the above-mentioned problems is obtained by twisting m (m = 6 to 15) thin metal filaments whose surfaces are plated with metal. Twisted with a pitch of 20 mm or more,
When the twist pitch P is 50 mm or more, n (n = 1 to 5) thin metal filaments with metal plating on the surface are spirally formed on the outside of the cord in which m thin metal filaments are twisted together. It is characterized by being wound.
【００１１】ここで、使用する細径金属フィラメントの
うち、少なくとも撚り合わせを行うｍ本のフィラメント
は、炭素含有率が０．６５〜０．７８重量％の範囲にあ
る鋼素線であるのが望ましい。Among the thin metal filaments used, at least m filaments to be twisted are steel strands having a carbon content of 0.65 to 0.78% by weight. desirable.
【００１２】また、撚りピッチが５０mm以上のときに外
側に巻くｎ本の細径金属フィラメントの巻回ピッチは、
４〜２０mmの範囲にあるのが好ましい。The winding pitch of n thin metal filaments wound outside when the twist pitch is 50 mm or more is
It is preferably in the range of 4 to 20 mm.
【００１３】さらに、ｍ本の細径金属フィラメントの直
径は０．１５〜０．３２mmの範囲にあり、この直径をｄ
ｃ、拘束に用いるｎ本の細径金属フィラメントの直径を
ｄｗとするとｄｗ＜ｄｃの関係を満足するのがよい。Further, the diameter of the m thin metal filaments is in the range of 0.15 to 0.32 mm, and this diameter is d
It is preferable to satisfy the relationship of dw <dc, where c is the diameter of n thin metal filaments used for restraint and dw is the diameter.
【００１４】かかる金属コードを天然ゴム又は合成ゴム
を主体とするゴム中に補強材として埋設して作られるタ
イヤ、コンベアベルト、高圧ホース等が本発明のゴム複
合物であって、この複合物は既知の金属コードで補強し
た従来の複合物に比べて耐久性に優れる。Tires, conveyor belts, high-pressure hoses, etc. made by embedding such metal cords in a rubber mainly composed of natural rubber or synthetic rubber as a reinforcing material are the rubber composites of the present invention. Greater durability than conventional composites reinforced with known metal cords.
【００１５】なお、細径金属フィラメントの表面に施す
金属めっきは、ゴムとの接着性を良くするために黄銅、
銅、亜鉛あるいは黄銅にＣｏ、Ｎｉ、Ｓｎの元素を添加
した三元合金めっきが望ましい。The metal plating applied to the surface of the small-diameter metal filament is brass in order to improve adhesion with rubber.
Ternary alloy plating in which elements of Co, Ni, Sn are added to copper, zinc or brass is desirable.
【００１６】[0016]
【作用】金属コード又は金属フィランメント単体におい
て、その斜め剪断強度を向上させるためには、金属フィ
ラメント径を極力細くし、撚り加工時に捩りによる塑性
変形によって生じる強度低下を抑制することが考えられ
る。また、同複合物、すなわちタイヤ等に埋設された金
属コード又は金属フィラメントにおいては、極力高伸長
を維持でき、ゴムの加硫成形温度（１４０〜１７０°
Ｃ）により青熱脆性（又は時効硬化現象）の影響が少な
いこと等が重要である。In order to improve the diagonal shear strength of the metal cord or the metal filanment alone, it is considered that the diameter of the metal filament is made as thin as possible to suppress the strength reduction caused by the plastic deformation due to the twist during the twisting process. Further, in the composite, that is, in the metal cord or the metal filament embedded in the tire or the like, it is possible to maintain a high elongation as much as possible, and the rubber vulcanization molding temperature (140 to 170 °).
It is important that the influence of blue heat brittleness (or age hardening phenomenon) is small due to C).
【００１７】以上の観点から検討を重ね、本発明におい
ては、従来の３＋６コード（二層構造）の撚りピッチ
（２０mm以下）より大幅に大きな撚りピッチの単撚りコ
ード（一層構造）にすることにより撚り加工時の捩りに
よる塑性変形を減少させ、斜め剪断強度の低下の抑制を
図ったのである。また、撚りピッチを大きくしたことに
より金属コードの特性（撚りの締まり具合等）を損なう
場合、即ち撚りピッチが５０mmを超える場合には外側に
ｎ本の細径金属フィラメントを巻き、これで内側のフィ
ラメントを拘束する構造にして金属コードの特性を維持
するようにしたのである。In consideration of the above points, the present invention provides a single twist cord (single layer structure) having a twist pitch significantly larger than the twist pitch (20 mm or less) of the conventional 3 + 6 cord (two layer structure). The plastic deformation due to twisting during twisting was reduced, and the reduction in diagonal shear strength was suppressed. Also, if the characteristics of the metal cord (such as the tightness of the twist) are impaired by increasing the twist pitch, that is, if the twist pitch exceeds 50 mm, n thin metal filaments are wound on the outside, and The structure is such that the filament is restrained so that the characteristics of the metal cord are maintained.
【００１８】以下に、数値限定の理由を述べる。The reasons for limiting the numerical values will be described below.
【００１９】先ず、被拘束フィラメント（撚り合わせる
ｍ本の細径金属フィラメント）を６〜１５本としたの
は、６本未満の場合、要求強度確保の面からフィラメン
ト径が従来の３＋６コードのフィラメント径より太径に
なることがあって好ましくなく、また、１５本を超える
とゴムとの複合物における耐食性（代用特性のゴム浸透
度）が低下してこれもまた好ましくない結果をもたらす
からである。First, the number of the restrained filaments (m small-diameter metal filaments to be twisted) is set to 6 to 15. When the number is less than 6, the filament diameter is the conventional 3 + 6 cord filament in order to secure required strength. This is because the diameter may be larger than the diameter, which is not preferable, and when the number exceeds 15, the corrosion resistance (rubber penetration of the substitute characteristic) in the composite with rubber decreases, and this also leads to undesirable results. .
【００２０】また、撚りピッチを２０mm以上にしたの
は、それ未満であると撚り加工時の捩りによる塑性変形
が従来の３＋６コードと大して差の無いものになり、強
度低下の抑制効果が得られないからである。If the twist pitch is set to 20 mm or more, if the twist pitch is less than 20 mm, the plastic deformation due to twisting during twisting is not much different from that of the conventional 3 + 6 cord, and the effect of suppressing strength reduction can be obtained. Because there is no.
【００２１】一方、外側に巻回するｎ本の金属フィラメ
ントについてその数を１〜５本に限定したのは、その数
が多い程巻回ピッチを大きくして生産性を高め得るが、
拘束の効果は少なくとも１本あれば得られ、また、この
フィラメントは拘束が目的であり、コードの切断強度の
向上に貢献するものではないので、過多による金属コー
ド全体の重量増を懸念して５本までとした。On the other hand, the reason for limiting the number of the n metal filaments wound to the outside to 1 to 5 is that the larger the number, the larger the winding pitch and the higher the productivity.
The effect of restraint can be obtained by at least one filament, and since this filament is intended for restraint and does not contribute to the improvement of the cutting strength of the cord, there is a concern that the weight of the entire metal cord will increase due to excess. Up to the book.
【００２２】さらに、このｎ本の金属フィラメントの巻
回ピッチについて４〜２０mmが好ましいとしたのは、４
mm未満だと生産性が低下してコストアップを招き、一
方、２０mmを超えると拘束力が低下して金属コードの特
性が悪くなるからである。Further, it is preferable that the winding pitch of the n metal filaments is 4 to 20 mm.
If it is less than 10 mm, the productivity is lowered and the cost is increased. On the other hand, if it exceeds 20 mm, the binding force is lowered and the characteristics of the metal cord are deteriorated.
【００２３】また、少なくとも被拘束フィラメントは炭
素含有率が０．６５〜０．７８重量％の鋼素線が良いと
したのは、鋼以外のフィラメント、或いは炭素含有率が
０．６５重量％以下の鋼フィラメントは、補強材の切断
強度維持のためにその径を太くする必要が生じるので斜
め剪断強度の低下を招き、また、炭素含有率が０．７８
重量％を超える鋼フィラメントは、ゴムとの複合化に必
要な加流成形時の温度による青熱脆性の影響が大きく、
切断強度は高め得るが斜め剪断強度が逆に低下し、両強
度のバランス維持が難しくなるからである。At least the restrained filament is preferably a steel wire having a carbon content of 0.65 to 0.78% by weight because filaments other than steel or carbon content of not more than 0.65% by weight. The steel filament of No. 1 needs to have a large diameter in order to maintain the cutting strength of the reinforcing material, resulting in a decrease in diagonal shear strength and a carbon content of 0.78.
Steel filaments in excess of wt% are greatly affected by blue heat embrittlement due to the temperature at the time of flow molding required for compounding with rubber,
This is because the cutting strength can be increased, but the diagonal shear strength decreases, and it becomes difficult to maintain the balance between the two strengths.
【００２４】なお、強度に寄与する被拘束フィラメント
の直径は、先に述べたように細径であるほど斜め剪断強
度の低下が少ないが、反面、コストアップを招き、ま
た、要求切断強度確保のための撚り本数が増え、撚線機
のフィラメント供給装置も多くなる。従って、細過ぎる
のも好ましくなく、金属フィラメントの撚り本数と切断
強度を考慮すると直径の適正範囲は０．１５〜０．３２
mm（より好ましくは０．２０〜０．３０mm）である。As described above, the smaller the diameter of the restrained filament that contributes to the strength, the smaller the decrease in the diagonal shear strength, but on the other hand, the cost is increased and the required cutting strength is ensured. For this reason, the number of twisted wires is increased, and the number of filament feeders for the twisting machine is increased. Therefore, it is not preferable that the diameter is too thin, and in consideration of the number of twisted metal filaments and the cutting strength, the appropriate diameter range is 0.15 to 0.32.
mm (more preferably 0.20 to 0.30 mm).
【００２５】また、拘束用金属フィラメントの直径は、
コード全体の直径を極力抑制することが望まれるので、
被拘束フィラメントよりも細くしておくのが望ましい。The diameter of the restraining metal filament is
Since it is desired to suppress the diameter of the entire cord as much as possible,
It is desirable to make it thinner than the bound filament.
【００２６】[0026]
【実施例】炭素含有率が０．７２重量％の鋼素線の表面
にブラスめっきを施した直径０．３０mmの金属フィラメ
ント１を７本、撚りピッチ４５mmで撚り合わせて図１
（ａ）に示す断面構造の金属コード（実施例１）を得
た。[Example] Seven metal filaments 1 having a diameter of 0.30 mm and having a brass plating on the surface of a steel wire having a carbon content of 0.72% by weight were twisted together at a twist pitch of 45 mm, and FIG.
A metal cord (Example 1) having a sectional structure shown in (a) was obtained.
【００２７】また、金属フィラメントの撚り本数、直
径、撚りピッチなどを変えて切断強度が略同水準になる
実施例１と同構造の金属コード（実施例２及び実施例
４）と、直径０．２６mmの金属フィラメント１を１２
本、撚りピッチ７０mmで撚り合わせ、更にその外側に拘
束用の金属フィラメント２を２本巻き付けた図１（ｂ）
に示す断面構造の金属コード（実施例３、その切断強度
も他のものと略同水準）を製作した。Further, a metal cord (Examples 2 and 4) having the same structure as that of Example 1 in which the cutting strength is approximately the same level by changing the number of twisted filaments, diameter, twist pitch, etc. 12 of 26 mm metal filament 1
Fig. 1 (b) in which two strands of metal filament 2 for binding are wound on the outside of the strand
A metal cord having a cross-sectional structure as shown in (Example 3, its cutting strength is about the same level as the others) was manufactured.
【００２８】更に、鋼素線の炭素含有率及び金属フィラ
メント１の撚りピッチを変更し、サイズ及び撚り構成は
実施例２と同じにした実施例５、６及び比較例１〜３の
金属コードと、フィラメントの撚り本数も２０本に変え
た金属コード（比較例４）、並びに図２に示す従来の３
＋６の２層撚り構造の金属コード（従来例１〜４）も作
った。従来例１〜４は、従来コードよりも炭素含有率を
高めた金属フィラメントを撚り合わせてある。Furthermore, the carbon cords of Examples 5 and 6 and Comparative Examples 1 to 3 in which the carbon content of the steel wire and the twist pitch of the metal filament 1 were changed so that the size and twist configuration were the same as those in Example 2 were obtained. , A metal cord in which the number of twisted filaments was changed to 20 (Comparative Example 4), and the conventional 3 shown in FIG.
A +6 two-layer twisted metal cord (conventional examples 1 to 4) was also made. In Conventional Examples 1 to 4, metal filaments having a higher carbon content than the conventional cord are twisted together.
【００２９】次に、以上の各試料について、タイヤトレ
ッド面の耐カット性能の代用特性である斜め剪断強度の
保持率と、耐食性の代用特性であるゴム浸透度を調べ
た。なお、斜め剪断強度の保持率測定には、図３に示す
試験機を用いた。この試験機は、試料３（金属コード）
の両端を円柱の固定ピン４で受けてチャック６で掴み、
その試料の中間部を、ハンドル７で位置調整を行える移
動ピン５で押し曲げ、その曲げ角αが一定の条件下で一
方のチャックを引き動かして剪断時の引張力を求める。
ここでの試験条件は、移動ピン５の先端Ｒ＝０．２mm、
曲げ角α＝４０°として行った。Next, with respect to each of the above samples, the retention rate of oblique shear strength, which is a substitute characteristic of the cut resistance of the tire tread surface, and the rubber penetration, which is a substitute characteristic of the corrosion resistance, were examined. The tester shown in FIG. 3 was used to measure the retention rate of the diagonal shear strength. This tester is sample 3 (metal code)
Receive both ends of the cylinder with the cylindrical fixing pin 4 and grasp with the chuck 6,
The intermediate portion of the sample is bent by the moving pin 5 whose position can be adjusted with the handle 7, and one chuck is pulled and moved under the condition that the bending angle α is constant, and the tensile force at the time of shearing is obtained.
The test condition here is that the tip R of the moving pin 5 is R = 0.2 mm,
The bending angle α was 40 °.
【００３０】結果を表１に示す。The results are shown in Table 1.
【００３１】[0031]
【表１】 [Table 1]
【００３２】この表１から判るように、実施例１〜６
は、従来例１〜４及び比較例１〜４に比べて斜め剪断強
度の保持率が高く、また、従来例１〜４に比べると、ゴ
ム浸透度も非常に高い。As can be seen from Table 1, Examples 1 to 6
Has a higher retention rate of oblique shear strength than Conventional Examples 1 to 4 and Comparative Examples 1 to 4, and has a very high rubber permeability as compared with Conventional Examples 1 to 4.
【００３３】[0033]
【発明の効果】以上述明したように、本発明の金属コー
ドは金属フィラメントの捩りによる塑性変形が減じられ
ているので斜め剪断強度の低下が少なく、また、ゴム浸
透度が良くて耐食性にも優れ、ゴム物品の補強材に要求
される特性を充分に満たす。従って、これを補強材とし
て作られるタイヤ、コンベアベルト、高圧ホース等のゴ
ム複合物は、その耐久性が向上する。As described above, since the metal cord of the present invention has reduced plastic deformation due to twisting of the metal filament, the diagonal shear strength is less deteriorated, and the rubber penetration is good and the corrosion resistance is also good. Excellent and fully satisfies the properties required for a reinforcing material for rubber articles. Therefore, the durability of the rubber compound such as a tire, a conveyor belt and a high pressure hose made by using this as a reinforcing material is improved.
【００３４】また、撚りピッチが大きいので撚り合わせ
回数が少なくて済み、製造面でも生産性の向上、コスト
削減を図ることができる。Further, since the twist pitch is large, the number of twists required is small, and it is possible to improve the productivity and reduce the cost in terms of manufacturing.
【図面の簡単な説明】[Brief description of drawings]
【図１】（ａ）：本発明の金属コードの一例を示す横断
面図 （ｂ）：他の実施例の横断面図FIG. 1A is a cross sectional view showing an example of a metal cord of the present invention. FIG. 1B is a cross sectional view of another embodiment.
【図２】従来の３＋６コードの横断面図FIG. 2 is a cross-sectional view of a conventional 3 + 6 cord.
【図３】斜め剪断荷重の測定に用いた試験機の模式図FIG. 3 is a schematic diagram of a testing machine used for measuring an oblique shear load.
１ 撚り合わせる金属フィラメント ２ 巻回用金属フィラメント ３ 試料 ４ 固定ピン ５ 移動ピン ６ チャック ７ ハンドル α 曲げ角 Ｒ 移動ピン先端の曲げ半径 1 Metal filament to be twisted 2 Metal filament for winding 3 Sample 4 Fixed pin 5 Moving pin 6 Chuck 7 Handle α Bending angle R Bending radius of moving pin tip
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成６年１０月１２日[Submission date] October 12, 1994
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００３[Name of item to be corrected] 0003
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００３】これらのうち、耐食性に関しては、ゴム中
に埋設された補強材にゴム未被覆部が存在すると、タイ
ヤが走行中に石や釘などを踏んで切り傷を受け、その傷
が補強材まで達したとき、補強材の切断荷重や耐食性が
低下する。また、補強材とゴムとの接着性が低下し、剥
離してタイヤのカットセパレーションによる品質トラブ
ルを起こす恐れもある。Among these, regarding the corrosion resistance, when a rubber-uncovered portion is present in the reinforcing material embedded in the rubber, the tire is stepped on stones, nails, etc. while the tire is running and suffers cuts, and the scratches extend to the reinforcing material. When it reaches, the cutting load and corrosion resistance of the reinforcing material decrease. Further, it reduces the adhesion between the reinforcing material and the rubber is peeled also a risk of quality problems caused by tire cut separation.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００９[Correction target item name] 0009
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００９】そこで、本発明は、タイヤのベルト部の補
強材として常用される３＋６の二層撚り構造コードでは
充分と云えなかった、耐食性及び耐斜め剪断強度を改良
した金属コードと、この金属コードを補強材料として耐
久性を向上させた、タイヤ、コンベアベルト、高圧ホー
ス等の複合物を提供しようとするものであるTherefore, the present invention cannot be said to be sufficient with the 3 + 6 double-layer twist structure cord that is commonly used as a reinforcing material for a belt portion of a tire, and a metal cord with improved corrosion resistance and diagonal shear strength, and this metal cord. It is intended to provide a composite material such as a tire, a conveyor belt, and a high pressure hose, which has improved durability by using as a reinforcing material.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３１[Correction target item name] 0031
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００３１】[0031]
【表１】 [Table 1]
【手続補正４】[Procedure amendment 4]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図３[Name of item to be corrected] Figure 3
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図３】 [Figure 3]
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ６０Ｃ 9/00 Ｊ 8408−3Ｄ Ｂ６５Ｇ 15/36 Continuation of the front page (51) Int.Cl. 6 Identification number Reference number within the agency FI Technical display location B60C 9/00 J 8408-3D B65G 15/36
Claims (7)
〜１５）の細径金属フィラメントを、撚りピッチ２０mm
以上で撚り合わせて成る金属コード。1. m pieces (m = 6) whose surfaces are metal-plated
~ 15) thin metal filament, twist pitch 20mm
A metal cord made by twisting the above.
記載の金属コードの外側に、表面に金属めっきを施した
ｎ本（ｎ＝１〜５）の細径金属フィラメントを螺旋状に
巻回して成る金属コード。2. A twist pitch of 50 mm or more.
A metal cord formed by spirally winding n (n = 1 to 5) thin metal filaments having a metal plated surface on the outside of the described metal cord.
ピッチＰｗを４〜２０mmの範囲にした請求項２記載の金
属コード。3. The metal cord according to claim 2, wherein the winding pitch Pw of the n thin metal filaments is in the range of 4 to 20 mm.
て、炭素含有率が０．６５〜０．７８重量％の範囲にあ
る鋼素線を用いた請求項１、２又は３記載の金属コー
ド。4. The metal cord according to claim 1, 2 or 3, wherein a steel wire having a carbon content in the range of 0.65 to 0.78% by weight is used as the m thin metal filaments.
ｄｃが０．１５〜０．３２mmの範囲にある請求項１乃至
４のいずれかに記載の金属コード。5. The metal cord according to claim 1, wherein a diameter dc of the m thin metal filaments is in the range of 0.15 to 0.32 mm.
ｄｃよりもｎ本の細径金属フィラメントの直径ｄｗを小
さくした請求項２乃至５のいずれかに記載の金属コー
ド。6. The metal cord according to claim 2, wherein the diameter dw of the n thin metal filaments is smaller than the diameter dc of the m thin metal filaments.
を天然ゴム又は合成ゴムを主体とするゴム中に補強材と
して埋設して作られるタイヤ、コンベアベルト、高圧ホ
ース等のゴム複合物。7. A rubber composite, such as a tire, a conveyor belt, a high pressure hose, which is made by embedding the metal cord according to claim 1 in a rubber mainly composed of natural rubber or synthetic rubber as a reinforcing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6019476A JPH07229078A (en) | 1994-02-16 | 1994-02-16 | Metal cord and its composite material with rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6019476A JPH07229078A (en) | 1994-02-16 | 1994-02-16 | Metal cord and its composite material with rubber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07229078A true JPH07229078A (en) | 1995-08-29 |
Family
ID=12000394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6019476A Pending JPH07229078A (en) | 1994-02-16 | 1994-02-16 | Metal cord and its composite material with rubber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07229078A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000190708A (en) * | 1998-12-25 | 2000-07-11 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire for passenger car |
-
1994
- 1994-02-16 JP JP6019476A patent/JPH07229078A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000190708A (en) * | 1998-12-25 | 2000-07-11 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire for passenger car |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0144811B1 (en) | Improved steel wire with high tensile strength | |
| EP0317636B1 (en) | Heavy-load radial tire | |
| EP0373595A1 (en) | Steel cord fo reinforcing rubber | |
| CN105297502A (en) | Steel cord for reinforcing rubber goods, and pneumatic tire | |
| JP2004527666A (en) | Multilayer steel cable for tire crown reinforcement | |
| CA2075041C (en) | High strength cord | |
| JPH0717126B2 (en) | High durability radial tire | |
| JP2995709B2 (en) | Steel cord for belt reinforcement of pneumatic tires for heavy loads | |
| JP2004523406A (en) | Multilayer steel cable for tire crown reinforcement | |
| JP6717701B2 (en) | Steel cord for tire and pneumatic tire using the same | |
| JPH07229078A (en) | Metal cord and its composite material with rubber | |
| JP2564507Y2 (en) | Steel cord for reinforcing rubber products | |
| KR100785241B1 (en) | Steel cord for radial tire | |
| EP3851575A1 (en) | Steel cord for reinforcing rubber article | |
| JPH07117406A (en) | Pneumatic radial tire for heavy load | |
| JPH03213401A (en) | Steel cord reinforced pneumatic tire | |
| KR100683956B1 (en) | Nylon-steel hybrid cord for tire | |
| JPH11124782A (en) | Steel cord and steel radial tire | |
| JP4351114B2 (en) | Steel cord and pneumatic radial tire | |
| JPH044162B2 (en) | ||
| JPH08226085A (en) | Ultra-high-strength steel cord and radial tire reinforced therewith | |
| JPH07292586A (en) | Metallic cord for reinforcing rubber product and its composite material with rubber | |
| KR200188434Y1 (en) | Steel code structure for radial tire of belt | |
| JP3486252B2 (en) | Steel cord | |
| JPH07279071A (en) | Metal cord and composite material of the cord and rubber |