JPS6342985A - Metal cord - Google Patents
Metal cordInfo
- Publication number
- JPS6342985A JPS6342985A JP61185261A JP18526186A JPS6342985A JP S6342985 A JPS6342985 A JP S6342985A JP 61185261 A JP61185261 A JP 61185261A JP 18526186 A JP18526186 A JP 18526186A JP S6342985 A JPS6342985 A JP S6342985A
- Authority
- JP
- Japan
- Prior art keywords
- cord
- filament
- metal
- metal cord
- rubber
- 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
Links
- 239000002184 metal Substances 0.000 title claims description 55
- 229910052751 metal Inorganic materials 0.000 title claims description 55
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 238000000465 moulding Methods 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 7
- 230000035699 permeability Effects 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000012779 reinforcing material Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000000059 patterning Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000003490 calendering Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2024—Strands twisted
- D07B2201/2029—Open winding
Landscapes
- Tires In General (AREA)
- Ropes Or Cables (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、ゴム物品、特に空気入シタイヤのベルト補強
材として使用されている一金属コードの耐コード折れ性
と軽量化、低転がり抵抗性を両立させる金属コードの改
良技術に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention is an improvement of a metal cord used as a belt reinforcing material for rubber articles, particularly pneumatic tires, which achieves both cord breakage resistance, weight reduction, and low rolling resistance. Regarding technology.
従来の技術
ゴム物品、特に空気入シラシアルタイヤに於いて、その
補強層として金属コードが従来よシ広く使用されている
。例えば、乗用車用ラジアルタイヤのベルト補強層とし
ては４本乃至５本この金属コードが補強材として使用さ
れる場合の重要な要件として、金属コードが被覆ゴム中
に適切に埋設され、充分に両者が接着していなければな
らない。被覆ゴムが金属コード内に充分浸透していなか
ったシ、接着状態が悪かったシすると、ゴム中の水分や
外気よシ浸入した水分等によシ金属コードのフィラメン
トに腐食が発生し、金属コードのフィラメントが折れた
す、コードとゴム間におけるセパレーション現象を起こ
すといった欠点がめった。BACKGROUND OF THE INVENTION Metal cords have been widely used as reinforcing layers in rubber articles, particularly pneumatic tires. For example, 4 to 5 metal cords are used as a belt reinforcing layer for a radial tire for a passenger car.When this metal cord is used as a reinforcing material, an important requirement is that the metal cord is properly embedded in the covering rubber and that both are sufficiently bonded. Must be glued. If the coating rubber has not penetrated into the metal cord sufficiently, or if the adhesion is poor, the filament of the metal cord will corrode due to moisture in the rubber or moisture that has entered from the outside air, causing the metal cord to deteriorate. The disadvantages were that the filament of the cord broke and a separation phenomenon occurred between the cord and the rubber.
この問題を解決すべく、従来よ）種々の方策が検討され
ている。特公昭６０−４９４２ ｒ号公報においては各
フィラメントの相互間で不等間隔をなす離散域のほか、
少なくとも１つの隣接相互間で離隔し、残シの隣接相互
間では接触する、部分的な接触域を含んで、長手方向に
不規則な断面分布をなす金属コードが開示され、実公昭
５８−４８５９２号公報には、撚りのあまい部分と締っ
た部分とを交互に構成する撚り構造を有するスチールコ
ードが開示されている。In order to solve this problem, various measures have been considered (conventionally). In Japanese Patent Publication No. 60-4942 R, in addition to discrete areas that are unequally spaced between each filament,
A metal cord is disclosed which has an irregular cross-sectional distribution in the longitudinal direction, including partial contact areas that are spaced apart from one another and in contact with the remaining ones, and disclosed in Japanese Utility Model Publication No. 58-48592. The publication discloses a steel cord having a twisted structure in which loosely twisted portions and tightly twisted portions are alternately formed.
一方、空気入９タイヤの転がり抵抗性の改善や省資源の
見地から、空気入シタイヤの軽量化が望まれており、空
気入シタイヤの補強層の厚さを薄くするため補強用金属
コードの撚構成の簡素化が試みられている。例えば特開
昭５９−１６８１９８号公報においては、空気入シタイ
ヤのような弾性製品補強用金属コードとして、第１の方
向へ一緒にねじれた２本のフィラメントからなる１本の
ストランドと、このストランドの撚方向と反対の方向に
さらに１本のフィラメントをらせん状に配置するという
、３本の金属フィラメントよりなる金属コードが開示さ
れている。On the other hand, in order to improve the rolling resistance of pneumatic tires and to save resources, it is desired that pneumatic tires be made lighter. Attempts are being made to simplify the configuration. For example, in Japanese Patent Application Laid-Open No. 59-168198, a metal cord for reinforcing an elastic product such as a pneumatic tire is constructed using a single strand consisting of two filaments twisted together in a first direction, and a metal cord for reinforcing an elastic product such as a pneumatic tire. A metal cord consisting of three metal filaments is disclosed, in which one further filament is arranged in a helical manner in the direction opposite to the twisting direction.
発明が解決しようとする問題点
前記特開昭５９−５９−１６ｌ１号公報に開示された３
本撚金属コードは２本のフィラメントでなる１本のスト
ランドと１本の撚フィラメントとの間に被覆ゴムが浸透
することをめざしたものであるが、２本のフィラメント
を撚り合わせてから、さらにもう１回他のフィラメント
と撚り合わさなければならず、製造コストがかさむばか
りでなく、圧縮疲労性が悪いという問題があった。Problems to be solved by the invention 3 disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 59-59-16l1
The purpose of this twisted metal cord is to allow the coating rubber to penetrate between one strand of two filaments and one twisted filament, but after twisting the two filaments together, It is necessary to twist other filaments one more time, which not only increases manufacturing costs but also causes problems in that compression fatigue properties are poor.
また、撚本数が５本の場合では、撚本数が少構成するよ
うに撚るのは 。In addition, when the number of twists is 5, it is best to twist so that the number of twists is small.
コードに張力が加わると撚りのあまい部分が締ってしま
うため、空気入シタイヤの補強用として用いた場合、被
覆ゴムのコードへの浸透が困難となる問題があった。When tension is applied to the cord, the loosely twisted portions tighten, so when used to reinforce pneumatic tires, there is a problem in that it is difficult for the coated rubber to penetrate into the cord.
以上の問題点を克服し、被覆ゴムがコード内に浸透し易
い撚本数が５本である金属コードを得るためには、結局
、特公昭６０−４９４２１号公報に開示された金属コー
ドを被覆ゴムがさらに浸透しやすいように改良すること
が有効であると考えられた。In order to overcome the above-mentioned problems and obtain a metal cord with five twists in which the coating rubber easily penetrates into the cord, the metal cord disclosed in Japanese Patent Publication No. Sho 60-49421 was developed using a coating rubber. It was thought that it would be effective to make improvements to make it more permeable.
本発明の目的は金属コードを構成するフィラメント本数
を５本に簡素化し、空気入りタイヤ等の弾性製品の軽量
化を図ると共に、被覆ゴムの金緘コード内への浸透を改
善し、腐食しにくくすることによりコード折れ性および
セパレーション性を改良した金属コードを提供すること
にある。The purpose of the present invention is to simplify the number of filaments that make up the metal cord to five, thereby reducing the weight of elastic products such as pneumatic tires, and improving the penetration of the covered rubber into the metal cord, making it less likely to corrode. The object of the present invention is to provide a metal cord with improved cord bending properties and separation properties.
本発明の構成は同じフィラメント直径ｄを有する３本の
金属フィラメントを同一方向に撚合せてなる金属コード
において、最も長いフィラメント中心間距離Ｌｍａｘ
と最も短かいフィラメント中心間距離Ｌｍ１ｎとが、
それぞれＬｍａｘ≧ｔ、ｏ ｓ ａおよびＬｍ１ｎ≧ｄ
ならびに、Ｌｍａｘ ７５ｍ１ｎ ≧１．０５を満足
し、撚ピンチが６．５乃至２ｏｍで、かつコード１本当
シ５．Ｏｋｇの荷重を掛けた場合０．２乃至１．２％の
伸度Ｐを有することを特徴とする金属コードである。Ｌ
ｍａｘがｔＯＳｄ未満であったシ、Ｌｍａｘ ／ Ｌｍ
ｉｎが１．０５未満であると被覆ゴムの浸透が急激に低
下してしまう。ＬｍａｘとＬｍｉｎとの関係は第１図に
示す通シである。 ・
Ｌｍａｘ は太きければ大きい程、被覆ゴムの浸透性と
いう点では有利ではあるが、Ｌｍａｘが３．Ｏｄを越え
るとコードの撚り乱れが起こ９易くな）、フィラメント
の引き揃えが悪くなり、コードの強力が低下してしまう
。The structure of the present invention is such that in a metal cord made by twisting three metal filaments having the same filament diameter d in the same direction, the longest distance between the filament centers Lmax
and the shortest distance between filament centers Lm1n,
Lmax≧t, o s a and Lm1n≧d, respectively
In addition, it satisfies Lmax 75m1n ≧1.05, the twisting pinch is 6.5 to 2 ohm, and the length of one cord is 5. The metal cord is characterized in that it has an elongation P of 0.2 to 1.2% when a load of 1,000 kg is applied. L
If max was less than tOSd, Lmax/Lm
If in is less than 1.05, the penetration of the coating rubber will drop sharply. The relationship between Lmax and Lmin is as shown in FIG. - The larger Lmax is, the more advantageous it is in terms of permeability of the coating rubber, but if Lmax is 3. If it exceeds Od, the cord is likely to become disordered (9), the filaments will not be aligned properly, and the strength of the cord will decrease.
またＬｍａｘ が１．５ｄ以上である領域が金°属コ
ードの任意の長手方向５０．の長さにおいて５０％以上
好ましくは５０％以上、実用上特に好ましくは５０〜９
５％存在していると、被覆ゴムの浸透性の点でさらに好
ましく、コードのフィラメント折れ性やコード・ゴム間
セパレーション性も著しく改善される。In addition, the area where Lmax is 1.5d or more is 50.0mm in any longitudinal direction of the metal cord. 50% or more, preferably 50% or more, practically preferably 50-9
When it is present in an amount of 5%, it is more preferable in terms of the permeability of the coating rubber, and the filament bendability of the cord and the separation between the cord and the rubber are also significantly improved.
コード１本当ｐ５．０ｋＰ荷重を掛けた場合の伸度Ｐを
０．２乃至１．２％と限定したのは０．２％未満では被
覆ゴムの浸透性が低く、１．２％を越えると裁断コード
の端部が撚９乱れを生じ易く、金属コードとゴムとのカ
レンダ一時にコード張力をコントロールしにくくなると
いう、作業性上の問題が起こるからである。この伸［Ｐ
が０．４乃至０．８％であれば上記のゴム浸透性及び作
業性の点でさらに好ましい。The reason why the elongation P when applying a load of 5.0 kP per cord is limited to 0.2 to 1.2% is because if it is less than 0.2%, the permeability of the coating rubber is low, and if it exceeds 1.2%, This is because the ends of the cut cord tend to become untwisted and it becomes difficult to control the cord tension during calendering between the metal cord and the rubber, which poses problems in terms of workability. This growth [P
is 0.4 to 0.8%, which is more preferable in terms of the above-mentioned rubber permeability and workability.
本発明金属コードの撚ピッチを６．５乃至２０關と限定
したのは、６．５層未満であると、コード製造時の生産
性が低下するばかりでなく、製造された金属コードの被
覆ゴム浸透性も低下するからであシ、また２０ｍを越え
ると金属コードの座曲疲労による耐コード折れ性が大き
く低下してしまうからである。The reason why the twist pitch of the metal cord of the present invention is limited to 6.5 to 20 layers is because if the number of layers is less than 6.5, not only the productivity during cord manufacturing will decrease, but also the coating rubber of the manufactured metal cord will be reduced. This is because the permeability is also reduced, and if the length exceeds 20 m, the resistance to bending of the metal cord due to bending fatigue will be greatly reduced.
本発明において、金属コードを構成するフィラメントの
直径は、用途により適宜選定されるべきものであるが、
乗用車用ラジアルタイヤのベルト補強材として用いる場
合は、フィラメント直径ｄが０．１２乃至０．４０ｍで
あることが好ましく、重車両用扁平ラジアルタイヤのカ
ーカスプライとして用いる場合はｏ、＋ｓｙ１ｇ乃至０
５０正であることが好ましい。結局、空気入りラジアル
タイヤ用としては０．１５乃至０．４０龍が好ましい。In the present invention, the diameter of the filament constituting the metal cord should be appropriately selected depending on the application, but
When used as a belt reinforcing material for radial tires for passenger cars, the filament diameter d is preferably 0.12 to 0.40 m, and when used as a carcass ply for flat radial tires for heavy vehicles, it is o, +sy1g to 0.
It is preferable that it is 50 positive. After all, 0.15 to 0.40 dragon is preferable for pneumatic radial tires.
乗用車用ラジアルタイ−Ｙのベルト補強材としてフィラ
メント直径ｄが０１２ｍｍ未満であるとコード強力が小
さ過ぎ、重車両用扁平ラジアルタイヤのカーカスプライ
としてフィラメント直径ｄが０．１５關未満であるとカ
ーカスプライを１層にすることが難しくなる。If the filament diameter d is less than 0.12 mm, the cord strength will be too low as a belt reinforcement material for radial tie-Y for passenger cars, and if the filament diameter d is less than 0.15 mm, the cord strength will be too low. It becomes difficult to make it into one layer.
また、乗用車用ラジアルタイヤのベルト補強材としてフ
ィラメント直径が０．４０朋を超えたシ、重車両用扁平
ラジアルタイヤのカーカス１ライとしてフィラメント直
径が０．５０ｙを超えるとコードの疲労性が低下するば
かりでなく、タイヤ重量が重くなり又製造時の生産性が
著しく低下するので好ましくない。In addition, if the filament diameter exceeds 0.40 mm as a belt reinforcement material for a radial tire for a passenger car, and if the filament diameter exceeds 0.50 mm as a carcass 1 lie of a flat radial tire for a heavy vehicle, the fatigue resistance of the cord will decrease. Not only this, but also the tire weight increases and the productivity during manufacturing is significantly reduced, which is not preferable.
本発明の金属コードとしては、その種類は限定されない
が、入手し易く安価である点からスチールコードが好ま
しく、この場合フィラメントは、その表面がゴムとの接
着を良好にするため、Ｃｕ 、 Ｓｎ 、 ｚｎ 等
あるいはこれらにＮ１やＣＯを含んだ合金によって被覆
されていてもかまわない。The metal cord of the present invention is not limited in type, but a steel cord is preferred because it is easily available and inexpensive.In this case, the filament has a surface made of Cu, Sn, It may be coated with zn or an alloy containing N1 or CO.
更に本発明において使用する金属コードは以下のように
して製造することができる。即ちあらかじめブリフォー
マ−にて過大に型づけしたフィラメント３本を撚り合せ
てコードにする。Further, the metal cord used in the present invention can be manufactured as follows. That is, three filaments, which have been shaped in advance using a preformer, are twisted together to form a cord.
必要に応じ撚った後に、所定の５に）荷重時伸度Ｐを持
つようにローラ等でコード径方向に圧縮コード状態での
最大径をＡ１及びフィラメント ″をほぐした時の最大
振幅をＢとした時、型づけの程度である型づけ率は譬Ｘ
Ｉ ＯＯ（７）で表わされる。過大に型づけするとは
前記型づけ率が１００％を超えることを表わす。型づけ
率を１００％以上に大きくするほどコードはいわゆるオ
ープン構造となりゴムが浸透しやすくなる。After twisting as necessary, A1 is the maximum diameter of the cord compressed in the radial direction with a roller etc. so that it has the elongation under load P, and the maximum amplitude when the filament is loosened is B. Then, the typing rate, which is the degree of typing, is
It is expressed as IOO(7). Excessive molding means that the molding rate exceeds 100%. As the molding rate increases to 100% or more, the cord becomes a so-called open structure, and the rubber penetrates more easily.
ゴムの浸透性、コード強力、及びタイヤ製造時の作業性
上から型づけ率は好ましくは１２０〜２００Ｘが好まし
い。実際にゴム浸透性１００％を得るためには型づけ率
を１５０％程度とすることが好ましい。From the viewpoint of rubber permeability, cord strength, and workability during tire manufacturing, the molding rate is preferably 120 to 200X. In order to actually obtain 100% rubber permeability, it is preferable to set the molding rate to about 150%.
ただし、型づけ率が５００％を越えると製造時コードの
撚り乱れが起き易くなり被覆するゴムゲージが厚くなっ
てタイヤ重量増加を招くので注意を要する。However, care must be taken because if the molding rate exceeds 500%, the cords tend to become disordered during manufacturing, and the covering rubber gauge becomes thicker, resulting in an increase in the weight of the tire.
従って、フィラメントの型づけ率が１００％を超え、２
００％以下であることが好ましい。Therefore, the filament patterning rate exceeds 100%, and 2
It is preferable that it is 00% or less.
コードを構成する各フィラメントの型づけ率は必ずしも
同じである必要はないが、各フィラメント間の型づけ率
が大きく異なるとコードのフィラメント強力利用率が低
下し好ましくない。Although it is not necessary that the molding ratios of the filaments constituting the cord be the same, it is not preferable that the molding ratios of the filaments differ greatly because the filament strength utilization ratio of the cord decreases.
１００％未満ではクローズド構造となりゴムが浸透しな
い。If it is less than 100%, it becomes a closed structure and the rubber does not penetrate.
Ｌｍ ａｘ を大きくするためには、各フィラメント
型づけ率を大きくするばかりでなく、１本のフィラメン
トのみ型づけ率を変えたり、型づけの位相を変えてもよ
い。In order to increase Lmax, it is possible not only to increase the molding rate of each filament, but also to change the molding rate of only one filament or to change the patterning phase.
本発明の金漠コードは被覆ゴムがコード内部によく浸透
し、耐腐食性が大幅に改良されるので、従来、耐腐食疲
労性がやや劣るとされていた高抗張カスチール線材が好
適に用いられ、この適用により、フィラメント直径を小
さくできるので、空気入りラジアルタイヤの補強材とし
て用いた時、さらにタイヤの軽量化及び転が９抵抗の低
減に効果を奏し得る。高抗張カスチール線材を得るため
にはスチール線材の炭素含有量を多くしたり、スチール
線材の引き抜き時に減面率を大きくしたりする。本発明
の金属コードに用いるスチールフィラメントとしては炭
素含有率が０．７５〜０．８５重量％で、抗張力が２８
０ ｋｙ ／ 朋２以上であることが好ましい。In the desert cord of the present invention, the coating rubber penetrates well into the inside of the cord, and the corrosion resistance is greatly improved. Therefore, high tensile castile wire rods, which were conventionally considered to have slightly inferior corrosion resistance, can be suitably used. By this application, the diameter of the filament can be reduced, so when used as a reinforcing material for a pneumatic radial tire, it can be effective in reducing the weight and rolling resistance of the tire. In order to obtain a high tensile castile wire rod, the carbon content of the steel wire rod is increased, and the area reduction rate during drawing of the steel wire rod is increased. The steel filament used in the metal cord of the present invention has a carbon content of 0.75 to 0.85% by weight and a tensile strength of 28%.
It is preferable that it is 0 ky/tomo 2 or more.
炭素含有率が０．７５重量％未満、又は抗張力が２ｓｏ
ｋｇ／龍２未満ではスチールフィラメント直径を小さく
する効果が実質的に得られず、炭素含有率が０．８５重
量％を超えるとコード製造時にフィラメント破断が発生
し易くなる。Carbon content less than 0.75% by weight or tensile strength 2so
If the carbon content is less than 2 kg/dragon, the effect of reducing the diameter of the steel filament cannot be obtained substantially, and if the carbon content exceeds 0.85% by weight, the filament is likely to break during cord production.
以下本発明の一具体例を図面に基づいて説明する。A specific example of the present invention will be described below based on the drawings.
第３函及び第４図において、Ａ、Ｂ、Ｃはそれぞれフィ
ラメントであり、本発明金属コードの長手方向の形状と
、各切断面での断面図を表わす。第５図の金属コードは
型づけ率が２本のフィラメントに、Ｂは１１０％である
が、他の１本のフィラメントＣは１５０％とし、フィラ
メントＡの位相をずらした。第４図の金属コードは、各
フィラメントの型づけ軍は１５０％であるが、２本のタ
イプメン）Ａ、Ｂの型づけの位相をずらした。第５図、
第４図いづれもわかりやすいように長手方向を圧縮して
図示した。In the third box and FIG. 4, A, B, and C are filaments, respectively, and represent the shape of the metal cord of the present invention in the longitudinal direction and cross-sectional views at each cut plane. In the metal cord shown in FIG. 5, two filaments were patterned, B was 110%, and the other filament C was 150%, and the phase of filament A was shifted. In the metal cord shown in Fig. 4, the patterning strength of each filament is 150%, but the patterning phases of the two filaments A and B are shifted. Figure 5,
In Figure 4, both are compressed in the longitudinal direction for ease of understanding.
本発明の金属コードはチューブラ−タイプの撚機、バン
チャータイプの撚機のいづれの撚機でも製造できる。The metal cord of the present invention can be manufactured using either a tubular type twisting machine or a buncher type twisting machine.
実施例
真ちゅうメツキを施した炭素含有ｉ０．８２％で抗張力
が２９５ｋＰ／Ｉ！ｌＩ２であるスチールフイラメン）
（０，５ｍ直径）を５本撚９合せた１×５構造のもの
１１種類の金属コードを作成した。Example Brass plating with carbon content of 0.82% and tensile strength of 295kP/I! steel filament which is lI2)
We created 11 types of metal cords with a 1×5 structure consisting of 5 wires (0.5 m diameter) twisted together and 9 pieces combined.
各コードは、各フィラメントの型づけ率を表のようにか
えた。For each code, the molding rate of each filament was changed as shown in the table.
実験Ｉ＆８．９のコードはそれぞれ＠３図第４Ｌ′？１
に示すコードである。いづれのコードもチューブラ−タ
イプの通常の撚機により撚り合わせた。燃った後、実験
Ａｌｌ以外のコードはローラーにて撚り上ったコードの
伸度Ｐｔ−調整し九これら金属コードをサイズ＋７ｓｓ
Ｒ＋４の乗用車用ラジアルタイヤの２層のベルト補強層
のうちタイヤ接地部に近い外側のベルト層に用い、被覆
ゴム５０％モジュラス２５１ｔ、ｑ／ｃｎｒ’により埋
設した。タイヤは１０種類の金属コードを全て言本のタ
イヤ中に埋設する、−わゆるウェイタイヤにより実験条
件が同一になるようにした。The codes for experiments I & 8.9 are respectively @3 Figure 4L'? 1
This is the code shown in Both cords were twisted together using a tubular type ordinary twisting machine. After burning, the cords other than Experiment All were twisted with a roller to adjust the elongation Pt of the cords.9 These metal cords were adjusted to size +7ss.
Of the two belt reinforcing layers of an R+4 passenger car radial tire, it was used for the outer belt layer near the tire ground contact area, and was embedded with a 50% coating rubber having a modulus of 251t, q/cnr'. All 10 types of metal cords were embedded in the original tire, a so-called way tire, to ensure that the experimental conditions were the same.
上記試作タイヤから、金属コードを採取してコード中央
部にゴムがほぼ完全に浸透している部分の長さを測定し
、ゴム浸透反をコード全長に対する完全にゴムが浸透し
ている畏さの比率（％）で表わした。ざらに上記試作タ
イヤ５本の接地部にそれぞれ、１１種類の金属コードに
達するような直径５ｆｌの穴を１１本あけ、屋外ドラム
試験機にて、ＪＩＳ正規内圧、Ｊ工ｓ正規荷重で水を散
布しながら時速９０−／Ｈで５万一連続走行させた後、
前記穴の位置に相当する金属コー、ドを採取し、埋設ゴ
ムとの接着界面がどの位の長さにわたって接着低下して
いるかをコードの腐食長さく０）として評価した。A metal cord was taken from the prototype tire mentioned above, and the length of the part where the rubber had almost completely penetrated into the center of the cord was measured. Expressed as a ratio (%). Roughly, 11 holes with a diameter of 5 fl, which would reach 11 types of metal cords, were drilled in each of the ground contact areas of the five trial tires mentioned above, and water was poured in using an outdoor drum testing machine at JIS standard internal pressure and JS standard load. After driving continuously for 50,000 hours at a speed of 90-/H while spraying,
A metal cord corresponding to the position of the hole was taken, and the length of the adhesive interface with the buried rubber where the adhesion decreased was evaluated as the corrosion length of the cord (0).
ここで伸度Ｐは全長２ｏｃｒｎの金属コードに５、Ｏｋ
ｐの荷重を掛けた場合の伸度（％）であり、Ｓ（％）と
は金属コードの任意の長手方向５０寵の長さにおいて、
Ｌｍａｘ が１．５ｄ以上で゛ある領域の割合（％）
である。Here, the elongation P is 5 for a metal cord with a total length of 2ocrn.
It is the elongation (%) when a load of p is applied, and S (%) is the elongation (%) at an arbitrary length of 50 cm in the longitudinal direction of the metal cord,
Percentage of area where Lmax is 1.5d or more (%)
It is.
実験ノに２〜１０の金属コードは耐腐食性が著しく改善
され、特に実験屋２〜６．８〜１０はカレンダ一作業性
も良好であった。実験Ａｌｌはカレンダー後裁断したコ
ード埋設ゴムシートの端部でコードの撚り乱れが大きく
、作業性が低下した。The corrosion resistance of the metal cords numbered 2 to 10 in the experiment was significantly improved, and in particular, the metal cords rated 2 to 10 had good calender workability. In Experiment All, the cords were significantly twisted at the ends of the cord-embedded rubber sheet cut after calendering, resulting in reduced workability.
発明の効果
以上のような構成からなる本発明の金属コードをゴム製
品の補強材として用いれば、被覆ゴムがコードの長手方
向及び断面方向に十分に浸透しているため、外傷による
水分の浸入に起因する金属コード表面の錆の拡散が防止
される。Effects of the Invention When the metal cord of the present invention having the above-described structure is used as a reinforcing material for rubber products, the rubber coating sufficiently penetrates in the longitudinal and cross-sectional directions of the cord, preventing water from entering due to external injury. This prevents the spread of rust on the surface of the metal cord.
そのため金属コードの腐食によるコードとゴムとの接着
力低下によるコード折れ性やセパレーション現象が大幅
に改善され、本発明の金属コードを用いたゴムとの複合
体は使用寿命が著しく改善される。このため本発明の複
合体の空気入クラシアルタイヤに用いられて優れた効果
を奏するばかりでなく、ベルトコンベア、ゴムクローラ
、ホース等の工業用品に広範囲に用いることかできる。Therefore, the cord breakage and separation phenomenon caused by a decrease in the adhesion between the cord and the rubber due to corrosion of the metal cord are significantly improved, and the life of the composite of the metal cord and rubber of the present invention is significantly improved. Therefore, the composite of the present invention can be used not only for excellent effects in pneumatic crural tires, but also for a wide range of industrial products such as belt conveyors, rubber crawlers, and hoses.
第１図は本発明の金属コードにおけるＬｍａｘとＬｍＬ
ｎ との関係を示す模式図、第２図（イ）、（ロ）は
夫々フィラメントのコード状態での最大径Ａとフィラメ
ントをほぐしたときの最犬襲巾Ｂを示す概念図第５（２
）および第４図は本発明の金属コードの各種実施態様の
長手方向の形状と各切断面での断面図を示す。Figure 1 shows Lmax and LmL in the metal cord of the present invention.
Figures 2 (a) and 2 (b) are schematic diagrams showing the relationship with n, and Figure 5 (2) is a conceptual diagram showing the maximum diameter A of the filament in a corded state and the maximum width B when the filament is unraveled.
) and FIG. 4 show longitudinal shapes and cross-sectional views at various cutting planes of various embodiments of the metal cord of the present invention.
Claims (1)
トを同一方向に撚合せてなる金属コードにおいて、最も
長いフィラメント中心間距離Ｌｍａｘと最も短かいフィ
ラメント中心間距離Ｌｍｉｎとが、それぞれＬｍａｘ≧
１．０５ｄおよびＬｍｉｎ≧ｄならびに、Ｌｍａｘ／Ｌ
ｍｉｎ≧１．０５を満足し、撚ピッチが６．５乃至２０
ｍｍで、かつコード１本当り５．０ｋｇの荷重を掛けた
場合０．２乃至１．２％の伸度を有することを特徴とす
る金属コード。In a metal cord formed by twisting three metal filaments having the same filament diameter d in the same direction, the longest distance between the filament centers Lmax and the shortest distance between the filament centers Lmin are each Lmax≧
1.05d and Lmin≧d and Lmax/L
Satisfies min≧1.05, twist pitch is 6.5 to 20
A metal cord having an elongation of 0.2 to 1.2% when a load of 5.0 kg is applied to each cord.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61185261A JPS6342985A (en) | 1986-08-08 | 1986-08-08 | Metal cord |
| US07/059,983 US4836262A (en) | 1986-08-08 | 1987-06-09 | Metal cords and pneumatic tires using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61185261A JPS6342985A (en) | 1986-08-08 | 1986-08-08 | Metal cord |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6342985A true JPS6342985A (en) | 1988-02-24 |
| JPH043474B2 JPH043474B2 (en) | 1992-01-23 |
Family
ID=16167726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61185261A Granted JPS6342985A (en) | 1986-08-08 | 1986-08-08 | Metal cord |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6342985A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0226990A (en) * | 1988-07-09 | 1990-01-29 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| JPH02229289A (en) * | 1989-03-01 | 1990-09-12 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| US5408819A (en) * | 1990-05-15 | 1995-04-25 | Sumitomo Electric Industries, Inc. | Metal cord for reinforcing rubber article |
| WO2021205691A1 (en) * | 2020-04-06 | 2021-10-14 | 株式会社ブリヂストン | Hose |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3777210B2 (en) * | 1995-01-24 | 2006-05-24 | 横浜ゴム株式会社 | Pneumatic radial tire |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743866A (en) * | 1980-08-11 | 1982-03-12 | Bridgestone Tire Co Ltd | Complex of metallic cord and rubber |
| JPS5848392U (en) * | 1981-09-22 | 1983-04-01 | 株式会社神戸製鋼所 | Biological treatment equipment for wastewater |
| JPS5861006A (en) * | 1981-10-06 | 1983-04-11 | Bridgestone Corp | Radial tire |
| JPS59168198A (en) * | 1983-03-11 | 1984-09-21 | ザ・グツドイア−・タイヤ・アンド・ラバ−・コンパニ− | Metal cable for reinforcing elastic product |
| JPS60189605A (en) * | 1984-03-10 | 1985-09-27 | Kawatetsu Kousen Kogyo Kk | Steel cord for fadial tire |
-
1986
- 1986-08-08 JP JP61185261A patent/JPS6342985A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743866A (en) * | 1980-08-11 | 1982-03-12 | Bridgestone Tire Co Ltd | Complex of metallic cord and rubber |
| JPS5848392U (en) * | 1981-09-22 | 1983-04-01 | 株式会社神戸製鋼所 | Biological treatment equipment for wastewater |
| JPS5861006A (en) * | 1981-10-06 | 1983-04-11 | Bridgestone Corp | Radial tire |
| JPS59168198A (en) * | 1983-03-11 | 1984-09-21 | ザ・グツドイア−・タイヤ・アンド・ラバ−・コンパニ− | Metal cable for reinforcing elastic product |
| JPS60189605A (en) * | 1984-03-10 | 1985-09-27 | Kawatetsu Kousen Kogyo Kk | Steel cord for fadial tire |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0226990A (en) * | 1988-07-09 | 1990-01-29 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| JPH0369721B2 (en) * | 1988-07-09 | 1991-11-05 | Toyo Tire & Rubber Co | |
| JPH02229289A (en) * | 1989-03-01 | 1990-09-12 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| US5408819A (en) * | 1990-05-15 | 1995-04-25 | Sumitomo Electric Industries, Inc. | Metal cord for reinforcing rubber article |
| WO2021205691A1 (en) * | 2020-04-06 | 2021-10-14 | 株式会社ブリヂストン | Hose |
| JP2021165567A (en) * | 2020-04-06 | 2021-10-14 | 株式会社ブリヂストン | hose |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH043474B2 (en) | 1992-01-23 |
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