KR20020078168A - Steel cord and tires using it - Google Patents

Steel cord and tires using it Download PDF

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Publication number
KR20020078168A
KR20020078168A KR1020010018187A KR20010018187A KR20020078168A KR 20020078168 A KR20020078168 A KR 20020078168A KR 1020010018187 A KR1020010018187 A KR 1020010018187A KR 20010018187 A KR20010018187 A KR 20010018187A KR 20020078168 A KR20020078168 A KR 20020078168A
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South Korea
Prior art keywords
steel cord
plating
steel
cobalt
brass
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KR1020010018187A
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Korean (ko)
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손봉영
임동민
김영구
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금호산업 주식회사
홍덕스틸코드주식회사
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Priority to KR1020010018187A priority Critical patent/KR20020078168A/en
Publication of KR20020078168A publication Critical patent/KR20020078168A/en

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • 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
    • D07B1/0666—Reinforcing cords for rubber or plastic articles the wires being characterised by an anti-corrosive or adhesion promoting coating
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3021—Metals
    • D07B2205/3085—Alloys, i.e. non ferrous
    • D07B2205/3089—Brass, i.e. copper (Cu) and zinc (Zn) alloys

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Ropes Or Cables (AREA)
  • Tires In General (AREA)

Abstract

PURPOSE: A steel cord having improved corrosion resistance and adhesion to tire rubber is provided to eventually improve tire durability under severe conditions. CONSTITUTION: The steel cord is manufactured by plating brass on a steel cord in the thickness of 150 to 300 nm; plating cobalt thereon in the thickness of 0.5 to 20 nm; thermal diffusing the plated metals into the steel cord at 400 to 600 deg.C for 4 to 15 sec; and plating copper on the cobalt layer in the thickness of 10 to 70 nm.

Description

스틸코드 및 이를 사용한 타이어{steel cord and tires using it}Steel cord and tires using it}

본 발명은 코발트와 황동으로 도금된 스틸코드와 이를 사용한 타이어에 관한 것으로, 상세하게는 타이어의 주성분인 고무와 접착도를 높여주는 동성분과 내식성을 갖는 코발트를 도금하여 접착성과 내식성이 우수한 스틸코드를 제조사용함으로써 타이어의 내구력을 향상시켜 주는 스틸코드와 이를 사용한 타이어에 관한 것이다.The present invention relates to a steel cord plated with cobalt and brass and a tire using the same, and more particularly, to a steel cord having excellent adhesion and corrosion resistance by plating cobalt having a copper component and corrosion resistance to improve adhesion with rubber, which is a main component of the tire. It relates to a steel cord and tires using the same to improve the durability of the tire by manufacturing.

일반적으로 타이어에 사용되는 스틸코드는, 타이어의 주성분인 고무와 접착도를 향상시킴과 동시에 스틸의 부식을 억제하기 위한 수단으로 황동을 표면에 피복하여 사용하고 있다. 타이어의 보강재로 사용하는 스틸코드는 강철와이어를 세정하여 원하는 직경으로 가공하고, 동과 아연의 합금인 황동으로 도금하여 최종 신선작업을 통하여 강철 코드심을 제작한 후, 이를 필요한 구조로 꼬아 최종 스틸코드를 완성하는 방법을 사용하고 있다.In general, steel cords used in tires are coated with brass on the surface as a means for improving adhesion to rubber, which is a major component of tires, and at the same time suppressing corrosion of steel. Steel cords used as tire reinforcement materials are cleaned of steel wires, processed to desired diameter, plated with brass, which is an alloy of copper and zinc, and manufactured through steel wire cores through final drawing. I am using the method to complete it.

이와 같이 강철 표면에 황동피복을 하면 일상의 조건에서는 코드의 부식억제 효과가 있으며 고무와 충분한 접착력이 유지된다.In this way, the brass coating on the steel surface has a corrosion inhibitory effect of the cord under ordinary conditions and maintains sufficient adhesion with rubber.

그러나, 코드가 과대한 응력, 열, 수분, 산소에 노출되는 조건에서는 코드의부식 및 고무와의 접착력 저하가 발생되어 타이어의 수명을 단축시키는 문제가 있However, under conditions where the cord is exposed to excessive stress, heat, moisture, and oxygen, corrosion of the cord and deterioration of adhesive strength with rubber occur, which shortens the life of the tire.

다.All.

상기와 같은 문제를 해결하기 위한 수단으로서, 황동도금 스틸코드의 내열 접착력 향상을 위해 스틸코드에 Cu/Zn/Co나 Cu/Zn/Ni 등의 삼원합금 도금방법이 미국특허 4,226,918호, 4,255,496호, 4,684,421호, 4,704,337호, 4,872,932호, 4,92As a means to solve the above problems, in order to improve the heat-resistant adhesive strength of the brass plated steel cord, a three-way alloy plating method such as Cu / Zn / Co or Cu / Zn / Ni is disclosed in US Pat. Nos. 4,226,918, 4,255,496, 4,684,421, 4,704,337, 4,872,932, 4,92

9,512호, 4,978,586호로 개시되어 있다.9,512, 4,978,586.

상기한 방법은 동과 아연 도금층에 제3의 원소로서 코발트, 니켈, 크롬, 몰리브덴 원소중 한가지를 소량 첨가하여 도금을 함으로써 고무와의 내열 접착력을 향상시키는 것이다.The above method is to improve the heat-resistant adhesion with rubber by plating by adding a small amount of one of the cobalt, nickel, chromium and molybdenum elements as a third element to the copper and zinc plating layers.

즉, 미국특허 4,255,496호에서는 황동도금층 위에 코발트를 황동 함량의 1∼7중량%를 도금하는 것을 특징으로 하고 있고, 미국특허 4,872,932호에서는 황동도금층 위에 직류전원을 이용하여 진공상태에서 코발트를 1nm∼1㎛ 증착도금하는 것을 특징으로 하며, 미국특허 4,929,512호에서는 황동도금층에 니켈을 5nm 범위로 황동함량의 4∼14중량%를 도금하는 것을 특징으로 하고, 미국특허 4,978,586호에서도 황동도금층 위에 플라즈마를 이용하여 코발트를 전착시키는 방법을 특징으로 하고 있다.That is, US Pat. No. 4,255,496 is characterized by plating 1 to 7% by weight of the cobalt brass content on the brass plating layer, US Pat. It is characterized in that the deposition plating, the U.S. Patent 4,929,512 is characterized in that the nickel plated on the brass plating layer 4 to 14% by weight of the brass content in the 5nm range, in the U.S. Patent 4,978,586 using a plasma on the brass plating layer It is characterized by a method of electrodepositing cobalt.

그러나, 상기한 발명들은 스틸코드 자체의 내식성은 향상되나, 스틸코드와 고무의 접착도에 있어서는 표면에 동의 함량이 적어 초기 접착력이 좋지 않는 문제가 있다. 또한, 상기한 방법은 스틸코드 외측에 상대적으로 경도가 높은 코발트 등을 도금함으로써 신선작업시 가공도를 낮추거나 가공속도를 줄여야 하는 생산성의 문제와 신선작업시 표면층의 파손이 발생되는 문제가 있다.However, the above inventions improve the corrosion resistance of the steel cord itself, but there is a problem in that the initial adhesive strength is not good because the content of copper is small on the surface of the steel cord and rubber. In addition, the above method has a problem in that the productivity of the work to reduce the workability or the processing speed during the drawing work by plating the cobalt and the like with a relatively high hardness on the outside of the steel cord, and the problem of breakage of the surface layer during the drawing work.

또한, 대한민국 특허 제73207호에는 스틸코드에 황동도금 후 내식성 향상시키기 위한 목적으로 스테아린산 니켈이나 스테아린산 코발트를 탄화수소계 오일에 용해시켜 도포하는 것을 특징으로 하는 것이 개시되어 있으나, 이 방법은 최종 연신 과정에서 도포하는 것으로서, 물리적인 부착이며 오일 도포량이 0.1% 이하가 사용되어 이에 따른 코발트나 니켈 함유량도 0.01% 이하의 미소량이 도포되므로 그 효과가 미미하다.In addition, Korean Patent No. 73207 discloses that nickel stearate or cobalt stearate is dissolved in a hydrocarbon-based oil and applied for the purpose of improving corrosion resistance after brass plating on a steel cord, but this method is performed in the final drawing process. As the coating, the effect is insignificant because the physical adhesion and the oil coating amount is 0.1% or less, and the cobalt or nickel content is also applied.

따라서, 본 발명이 이루고자 하는 기술적 과제는 전술한 문제점을 해소할 수 있도록 스틸코드에 내식성을 부여함과 동시에 타이어의 주성분인 고무와의 접착력을 향상시킨 스틸코드와 이를 사용한 타이어를 제공함에 있다.Accordingly, the technical problem to be achieved by the present invention is to provide a steel cord and a tire using the same, which provides corrosion resistance to the steel cord and improves adhesion to rubber, which is a main component of the tire, to solve the above-mentioned problems.

전술한 기술적 과제는 황동이 도금된 스틸코드 표면에 내식성이 좋은 코발트를 도금하고, 고무와 접착되는 외표면에는 고무와 접착도가 좋은 동을 도금함으로써 이루어질 수 있다.The technical problem described above may be achieved by plating cobalt having good corrosion resistance on the surface of brass plated steel cord, and plating copper having good adhesion with rubber on the outer surface bonded with rubber.

이하 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail.

본 발명은 스틸코드 표면에 황동을 150∼300nm의 두께로 도금한 후, 황동도금층 위에 코발트를 0.1∼20nm를 도금하고, 열확산로에서 400∼600℃로 4∼15초간 확산시킨 후, 코발트 도금층 위에 동을 10∼70nm 두께로 도금하여 내식성이 향상되고 고무와의 접착도가 높은 스틸코드를 제조할 수 있다.According to the present invention, after plating brass on the surface of steel cord with a thickness of 150 to 300 nm, plating 0.1 to 20 nm of cobalt on the brass plating layer, and diffusing for 4 to 15 seconds at 400 to 600 ° C. in a thermal diffusion furnace, and then on the cobalt plating layer Copper can be plated to a thickness of 10 to 70 nm to produce a steel cord with improved corrosion resistance and high adhesion to rubber.

여기서, 스틸코드에 황동을 1차로 도금하는 것은 황동층에 의하여 코발트에 의한 내식성을 보완하므로써 스틸코드의 내식성을 증대시키기 위함이다.Here, the primary plating of brass on the steel cord is to increase the corrosion resistance of the steel cord by supplementing the corrosion resistance by cobalt by the brass layer.

또한, 열확산 공정은 황동과 코발트를 도금한 후 실시하는 것으로 하였으나, 황동을 도금한 후 열확산을 실시하고 신선공정 후 코발트와 동을 도금하여도 좋고, 황동을 도금한 후 코발트와 동을 도금하고 열확산을 실시하여도 좋으며, 황동을 도금한 후 신선, 연신 작업후 코발트와 동을 도금한 후 열확산을 실시하여도 좋다. 이는 황동도금층과 코발트도금층 및 코발트도금층과 동 도금층의 결합을 강화시켜 도금층간의 접착력을 향상시켜 도금층의 탈리를 방지시키기 위함이다.In addition, the thermal diffusion process is to be carried out after the plating of brass and cobalt, but the thermal diffusion after plating the brass, and the cobalt and copper may be plated after the drawing process, or after the brass plating, the cobalt and copper plating and thermal diffusion After plating brass, cobalt and copper may be plated after drawing and stretching, and then thermal diffusion may be performed. This is to prevent the detachment of the plating layer by enhancing the bonding between the brass plating layer and the cobalt plating layer and the cobalt plating layer and the copper plating layer to improve the adhesion between the plating layers.

물론, 상기 열확산 공정의 순서 변경에 따라 신선공정에서의 신선 가공도와 신선속도에 약간의 차이는 있을 수 있으나, 스틸코드의 내식성과 접착성면에서는 차이가 없다.Of course, there may be a slight difference in drawing workability and drawing speed in the drawing process according to the change of the order of the thermal diffusion process, but there is no difference in corrosion resistance and adhesiveness of the steel cord.

동을 도금하는 이유는, 전술한 바와 같이 동이 고무와의 접촉도를 향상시키는 점을 이용하여 스틸코드가 고무로부터 탈리되는 것을 방지시켜 주기 위한 것으로서 고무와 접촉되는 표면층에 도금한다.The reason for plating copper is to prevent the steel cord from detaching from the rubber by using the point of improving the contact with the rubber as described above, and to plate the surface layer in contact with the rubber.

본 발명을 더욱 상세히 설명하면, 2차 신선가공된 직경 0.15∼2.0mm의 스틸와이어에 스틸 와이어 1kg당 동 2∼8g, 아연 1∼4g이 함유된 황동을 도금한 후에, 코발트를 와이어 1kg 당 0.01∼0.04g을 도금하고 400∼600℃의 열확산로에서 4∼15초간 확산시켜 코발트가 황동층에 확산 혼합되도록 하고, 이어서 동을 0.04∼0.5g 도금하는 것이다.The present invention will be described in more detail, after coating a brass wire containing 2 to 8 g of copper and 1 to 4 g of zinc per 1 kg of steel wire on a steel wire having a diameter of 0.15 to 2.0 mm, which is secondary drawn, and then cobalt is 0.01 per kg of wire. Plating at -0.04 g and diffusing for 4 to 15 seconds in a 400-600 DEG C thermal diffusion furnace allows cobalt to diffuse and mix in the brass layer, followed by plating 0.04-0.5 g of copper.

이 때 사용되는 스틸와이어는 탄소 함량이 0.75중량%∼0.92중량%인 장력스틸The steel wire used at this time is a tension steel with a carbon content of 0.75% to 0.92% by weight.

(Normal tensile steel), 고장력스틸(High tensile steel), 초 고장력스틸(Super(Normal tensile steel), High tensile steel, Super high tensile steel (Super

high tensile steel)중 어느 것을 사용하여도 좋다.any of high tensile steel may be used.

이하 실시예에 의하여 설명한다.It demonstrates by an Example below.

(실시예 1)(Example 1)

종래 방법에 따라 스틸와이어의 표면에 스틸 와이어 1kg당 3.5g/의 황동을 도금한 스틸와이어 시편1과, 본 발명에 따라 스틸와이어 표면에 스틸 와이어 1kg당 각각 3.05g의 황동 및 0.015g의 코발트를 도금한 후, 500℃에서 열확산시키고, 스틸 와이어 1kg당 0.3g의 동을 도금한 스틸와이어 시편2와, 시편2의 조건과 동일하게 실시하되, 코발트의 도금량을 스틸 와이어 1kg당 0.1g으로 증대시킨 스틸와이어 시편3을 각각 제작하여, 초기접착도, 열 열화 후 접착도 및 수분열화 후 접착도에 대한 테스트를 실시하였다. 테스트 방법은 ASTM D2229:T-Tset에 따랐으며, 열 열화는 95℃ 공기 오븐에서 15일간, 수분열화는 85℃, 85% 상태습도 하에서 15일 방치한 후 접착도에 대한 테스트를 실시하였다.Steel wire specimen 1 plated with 3.5 g / kg of brass per 1 kg of steel wire on the surface of the steel wire according to the conventional method, and 3.05 g of brass and 0.015 g of cobalt per kg of steel wire, respectively, on the surface of the steel wire according to the present invention. After plating, heat diffusion at 500 ° C., and subjected to the same conditions as the steel wire specimen 2 and specimen 2 plated with 0.3 g of copper per 1 kg of steel wire, the cobalt plating amount was increased to 0.1 g per 1 kg of steel wire Steel wire specimens 3 were fabricated and tested for initial adhesion, adhesion after thermal degradation, and adhesion after moisture degradation. The test method was according to ASTM D2229: T-Tset, and the thermal degradation was tested for adhesion after leaving for 15 days in a 95 ° C. air oven, and for 15 days at 85 ° C. and 85% humidity.

또한, 스틸코드는 3 ×0.30 High Tensile steel 코드를 사용하여 테스트하였으며, 테스트 결과는 다음과 같다.In addition, the steel cord was tested using a 3 × 0.30 High Tensile steel cord, the test results are as follows.

시험항목Test Items 시편 1Psalm 1 시편 2Psalm 2 시편 3Psalm 3 초기접착도(foree/coverage)Initial adhesion (foree / coverage) 42.7kgf/92%42.7kgf / 92% 45kgf/95%45kgf / 95% 45.5kgf/95%45.5kgf / 95% 15일 열 열화후 접착 도 (95℃, 공기오븐)15 days after thermal deterioration (95 ℃, air oven) 17.5kgf/80%17.5kgf / 80% 20.1kgf/94%20.1kgf / 94% 19.8kgf/87%19.8kgf / 87% 15일 수분 열화후접착도(85℃, 85% 상대습도)Adhesion after 15 days moisture deterioration (85 ℃, 85% relative humidity) 36.2kgf/76%36.2kgf / 76% 43.2kgf/95%43.2kgf / 95% 41.8kgf/94%41.8kgf / 94%

상기 결과에 나타난 바와 같이, 본 발명에 따른 시편 2는 초기 접착도가 향상되며, 내식성 및 내열성이 향상된 것을 알 수 있다. 또한, 시편2에 비하여 코발트 도금량을 증대시킨 시편3에서도 종래기술이 적용된 시편1에 비해 내식성 및 내열성이 증대된 것을 알 수 있으나, 본 발명에 따른 시편2에 비해 내열성 및 내식성이 부족한 것으로 나타났다. 즉, 코발트가 초과되어 과량 함유되는 경우에는, 내식성 및 내열성이 저하됨을 알 수 있다.As shown in the above results, the specimen 2 according to the present invention can be seen that the initial adhesion is improved, the corrosion resistance and heat resistance is improved. In addition, the specimen 3, which has increased the amount of cobalt plating compared to the specimen 2, can be seen that the corrosion resistance and heat resistance increased compared to the specimen 1 to which the prior art is applied, but it was found that the heat resistance and corrosion resistance is insufficient compared to the specimen 2 according to the present invention. That is, when cobalt is exceeded and it contains excessively, it turns out that corrosion resistance and heat resistance fall.

(실시예 2)(Example 2)

실시예1에서 본 발명에 따른 시편2의 적용된 스틸와이어로 제작된 타이어와 종래 스틸와이어인 시편1을 사용하여 제작된 타이어의 내구력을 테스트하여 다음과 같은 결과를 얻었다.In Example 1, the tires manufactured by using the steel wire applied to the specimen 2 of the present invention and the tire manufactured using the specimen 1 which is a conventional steel wire were tested to obtain the following results.

적용된 타이어의 규격은 195/70 R14 22.5로 하였으며, 내구력 테스트는 통상의 내구력 테스트 방법으로 실시하였다.The size of the applied tire was 195/70 R14 22.5, and the endurance test was performed by the usual endurance test method.

항 목Item 종래코드타이어(시편 1사용)Conventional code tires (with specimen 1) 본 발명 코드타이어(시편 2사용)Cord tire of the present invention (using specimen 2) 속도 내구력(ECER-30)(시간:분)Speed durability (ECER-30) (hour: minute) 1:341:34 1:551:55 부하 내구력(DOT-109)(시간:분)Load durability (DOT-109) (hour: minute) 7:387:38 7:597:59

상기 결과로부터, 본 발명에 따른 스틸코드의 내열성, 내식성 및 접착성 향상으로 인하여 타이어의 내구력도 크게 향상되는 것을 알 수 있다.From the above results, it can be seen that due to the heat resistance, corrosion resistance and adhesion of the steel cord according to the present invention, the durability of the tire is also greatly improved.

본 발명은 스틸코드에 황동과 코발트 도금을 하여 내식성 및 내열성을 향상시키며, 그 표면에 동을 도금하여 스틸코드와 고무와의 접착력을 향상시킴으로써, 코드가 응력, 열, 수분이나 산소에 노출되는 가혹한 조건에서도 코드의 부식 및 고무와의 접착력 저하를 방지시켜 궁국적으로 타이어의 내구력을 향상시켜 주는 효과가 있다.The present invention improves corrosion resistance and heat resistance by plating brass and cobalt on steel cords, and improves adhesion between steel cords and rubber by plating copper on the surface thereof, so that the cord is exposed to stress, heat, moisture or oxygen. Even under the conditions, it is possible to prevent corrosion of the cord and deterioration of adhesive strength with rubber, thereby improving tire durability.

Claims (7)

신선가공된 타이어용 강철와이어 표면에 황동을 도금하고, 상기 황동도금층 위에 코발트 도금층을 형성한 후 그 표면에 다시 동을 얇게 도금하는 특징으로 하는 스틸코드.Steel plate for the steel wire for the freshly processed tire, and after forming a cobalt plated layer on the brass plating layer, the steel cord characterized in that the copper thin plated on the surface again. 제 1 항에 있어서,The method of claim 1, 상기 황동도금층은 스틸 와이어 1kg 당 각각 동 2∼8g, 아연 1∼4g이 함유된 것을 특징으로 하는 스틸코드.The brass plating layer is steel cord, characterized in that it contains copper 2 to 8g, zinc 1 to 4g per 1kg of steel wire. 제 1 항에 있어서,The method of claim 1, 상기 코발트 도금층은 스틸 와이어 1kg 당 코발트가 0.01∼0.04g 함유된 것을 특징으로 하는 스틸코드.The cobalt plating layer is a steel cord, characterized in that containing 0.01 ~ 0.04g cobalt per 1kg of steel wire. 제 1 항에 있어서,The method of claim 1, 스틸코드 표면의 동 도금층은 스틸 와이어 1kg 당 동이 0.04∼0.5g 함유된 것을 특징으로 하는 스틸코드.The copper plating layer on the surface of the steel cord is characterized by containing 0.04 ~ 0.5g of copper per 1kg of steel wire. 제 1 항 내지 제 4 항중 어느 한 항에 있어서,The method according to any one of claims 1 to 4, 코발트를 도금한 후에 400∼600℃에서 열확산을 실시하는 것을 특징으로 하는 스틸코드.A steel cord characterized by thermal diffusion at 400 to 600 占 폚 after plating of cobalt. 제 5 항에 있어서,The method of claim 5, 상기 스틸 와이어는 직경이 0.15∼2.0mm인 것을 특징으로 하는 스틸코드.The steel wire is characterized in that the steel cord is 0.15 ~ 2.0mm in diameter. 제 1 항 내지 제 4 항의 스틸코드를 사용하여 제작된 스틸코드를 사용한 것을 특징으로 하는 타이어.A tire characterized by using a steel cord manufactured using the steel cord of claim 1.
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Publication number Priority date Publication date Assignee Title
KR101338808B1 (en) * 2006-12-29 2013-12-06 주식회사 효성 Steel cord of a rough surface and manufacturing method thereof
KR101508683B1 (en) * 2014-11-10 2015-04-07 홍덕산업(주) Steel cord for reinforcing rubber and method for the same
WO2019177281A1 (en) * 2018-03-12 2019-09-19 홍덕산업(주) Electroplated bead wire having excellent oxidation resistance

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JPH01177390A (en) * 1988-01-06 1989-07-13 Bridgestone Corp Production of metallic wire rod for reinforcing rubber product
KR100291467B1 (en) * 1999-05-19 2001-05-15 최의박 Steel tire cord having a superior rubber adhesion properties
KR20020055203A (en) * 2000-12-28 2002-07-08 정생규 Steel cord with superior corrosion-resistance

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Publication number Priority date Publication date Assignee Title
JPH01177390A (en) * 1988-01-06 1989-07-13 Bridgestone Corp Production of metallic wire rod for reinforcing rubber product
KR100291467B1 (en) * 1999-05-19 2001-05-15 최의박 Steel tire cord having a superior rubber adhesion properties
KR20020055203A (en) * 2000-12-28 2002-07-08 정생규 Steel cord with superior corrosion-resistance

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101338808B1 (en) * 2006-12-29 2013-12-06 주식회사 효성 Steel cord of a rough surface and manufacturing method thereof
KR101508683B1 (en) * 2014-11-10 2015-04-07 홍덕산업(주) Steel cord for reinforcing rubber and method for the same
US20160130750A1 (en) * 2014-11-10 2016-05-12 Hongduk Industrial Co. Ltd. Steel cord for rubber reinforcement and method for manufacturing the same
CN105586795A (en) * 2014-11-10 2016-05-18 弘德产业株式会社 Steel cord for rubber reinforcement and method for manufacturing the same
US9970156B2 (en) * 2014-11-10 2018-05-15 Hongduk Industrial Co., Ltd. Steel cord for rubber reinforcement and method for manufacturing the same
WO2019177281A1 (en) * 2018-03-12 2019-09-19 홍덕산업(주) Electroplated bead wire having excellent oxidation resistance
JP2021515853A (en) * 2018-03-12 2021-06-24 ホンドク インダストリアル カンパニー リミテッド Electroplated bead wire with excellent oxidation resistance
US11447886B2 (en) 2018-03-12 2022-09-20 Hongduk Industrial Co., Ltd. Electroplated bead wire having excellent oxidation resistance

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