KR101222403B1 - 2+5 type steel cord for tire of vehicle. - Google Patents

2+5 type steel cord for tire of vehicle. Download PDF

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Publication number
KR101222403B1
KR101222403B1 KR1020060093955A KR20060093955A KR101222403B1 KR 101222403 B1 KR101222403 B1 KR 101222403B1 KR 1020060093955 A KR1020060093955 A KR 1020060093955A KR 20060093955 A KR20060093955 A KR 20060093955A KR 101222403 B1 KR101222403 B1 KR 101222403B1
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South Korea
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steel cord
diameter
core
rubber
line
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KR1020060093955A
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Korean (ko)
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KR20080028554A (en
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공재도
김민안
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주식회사 효성
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/48—Tyre cords
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/0007—Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/12—Threads containing metallic filaments or strips
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
    • D02G3/28—Doubled, plied, or cabled threads
    • 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
    • D07B1/0666—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
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2046—Tire cords
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/02—Reinforcing materials; Prepregs
    • D10B2505/022—Reinforcing materials; Prepregs for tyres
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S57/00—Textiles: spinning, twisting, and twining
    • Y10S57/902—Reinforcing or tire cords

Abstract

본 발명은 차량용 타이어의 고무제품 보강용으로 사용되는 스틸코드로서, 심(직경 d1) 2가닥과 측선(직경 d2) 5가닥으로 구성되는 2xd1 + 5xd2의 꼬임 구조를 가지며 그 꼬임에서 심과 측선의 꼬임 방향이 서로 반대인 것을 특징으로 한다. 여기서 심과 측선의 선경비 (d2/d1)는 1.4 이상 2.0 이하이어야 한다.The present invention is a steel cord used for reinforcing rubber products of vehicle tires, and has a twist structure of 2xd1 + 5xd2 composed of two strands (diameter d1) and five strands (diameter d2). It is characterized in that the twist direction is opposite to each other. Where the line-to-line ratio (d2 / d1) of the seam and sideline is not less than 1.4 and not more than 2.0.

본 발명의 스틸코드는 기존의 3x0.20 + 6x0.35 구조와 비교하였을 때 심과 측선간의 꼬임방향이 다르다는 공통점이 있으나 기존 3+6 구조에서 측선과 심선을 1개씩 감소시키면서 동시에 심선의 직경을 더 크게 만들어 측선이 자연스럽게 벌어지도록 함으로써 스틸코드 내부로의 고무침투력이 향상되어 심과 고무 간의 접착력을 증가시켜 스틸코드의 내식성을 향상시키고 궁극적으로 타이어의 내구성을 증가시킬 수 있다.The steel cord of the present invention has a common point that the twist direction between the core and the side line is different compared to the existing 3x0.20 + 6x0.35 structure, but simultaneously reduces the diameter of the core line while reducing the side and core lines by one in the existing 3 + 6 structure. By making it larger, the sidelines naturally open, which improves the rubber penetration into the steel cord, increasing the adhesion between the seam and the rubber, improving the steel cord's corrosion resistance and ultimately increasing tire durability.

2+5구조, 스틸코드, 심, 측선, 고무침투력 2 + 5 structure, steel cord, shim, siding, rubber penetration

Description

2+5 구조의 차량용 타이어용 스틸코드 { 2+5 type steel cord for tire of vehicle. } 2 + 5 type steel cord for tire of vehicle. }

도 1은 본 발명에 따른 스틸코드의 횡단면도.1 is a cross-sectional view of a steel cord according to the present invention.

도 2는 비교예인 기존의 3+6 구조의 횡단면도.2 is a cross-sectional view of a conventional 3 + 6 structure as a comparative example.

스틸코드(steel cord)는 차량의 타이어 및 공업용 벨트를 비롯한 각종 고무 제품의 보강용으로 사용되는 여러 종류의 보강재 중에서 강도, 모듈러스, 내열성, 열전달율, 내피로성 및 고무 접착성 등이 우수하여 특히 타이어 보강재로 널리 사용되고 있으며 그 사용량도 날로 증가하는 추세에 있다.Steel cord is especially good for tire reinforcement because of its excellent strength, modulus, heat resistance, heat transfer rate, fatigue resistance and rubber adhesion among various kinds of reinforcement materials used for reinforcement of various rubber products including tires and industrial belts of vehicles. It is widely used and its usage is also increasing day by day.

일반적으로 스틸코드는 탄소함량이 0.6~0.95중량%인 탄소강을 최종 선경이 0.1~0.5mm가 되게 한 것으로서 그 표면에 황동으로 된 도금층을 형성시켜서 용도에 따라 다양한 꼬임 구조로 꼬아서 제조한 것이다.In general, steel cords are made of carbon steel having a carbon content of 0.6-0.95% by weight to have a final wire diameter of 0.1-0.5 mm, and are formed by twisting them into various twisted structures by forming a plating layer of brass on the surface thereof.

상기 스틸코드를 구성하는 필라멘트 표면의 황동 도금층은 신선 시 마찰력 감소의 역할을 수행하며 이후 타이어 제조시 고무와의 접착성을 증진시키게 되며 또한 이렇게 고무와 부착된 부분의 스틸코드는 공기 및 수분과의 접촉이 억제되어 내식성이 향상되어 진다. The brass plated layer of the filament surface constituting the steel cord plays a role of reducing friction when drawing, and afterwards, improves adhesion to rubber during tire manufacturing. Contact is suppressed and corrosion resistance improves.

따라서 스틸코드를 구성하는 강선의 표면에 고무가 부착된 비율을 향상시켜야만 타이어의 내구성을 향상시킬 수 있다. Therefore, the durability of the tire can be improved only by increasing the proportion of rubber attached to the surface of the steel wire constituting the steel cord.

통상적으로 고무제품의 내부에 매설되어 보강재로서의 역할을 하는 스틸코드 중에서 카카스 및 벨트에 많이 사용되는 구조 중 하나인 3x0.20 + 6x0.35 (n1xd1 + n2xd2)를 살펴보면 다음과 같은 문제점이 있다. ( n1 ; 심선의 본수, n2 ; 측선의 본수, d1 ; 심선의 직경, d2 ; 측선의 직경 )If one looks at 3x0.20 + 6x0.35 (n1xd1 + n2xd2), which is one of the structures commonly used in the carcass and belt among steel cords that are buried inside the rubber product and serve as reinforcement materials, have the following problems. (n1; number of cores, n2; number of side lines, d1; diameter of core, d2; diameter of side line)

상기 스틸코드는 도 2에 도시한 바와 같이 심선 0.20mm 3가닥이 꼬임을 형성함으로써 생성되는 심의 둘레의 길이에 비하여 측선 0.35mm 6가닥이 차지하는 비율이 높아 고무침투성이 떨어지게 된다. As shown in FIG. 2, the steel cord has a high ratio of 0.35mm of six strands compared to the length of the circumference of the core generated by forming three twisted strands of 0.20mm of the core wire, thereby deteriorating rubber permeability.

특히 스틸코드의 경우 타이어 제조를 위한 압연 작업시 측선이 압력을 받아 더욱 심에 밀착하는 형태가 되므로 스틸코드 내부로의 고무침투성이 더욱 낮아지고 심측의 고무 부착률이 떨어져 타이어 내구성이 저하되는 문제가 있었다.Particularly, in the case of steel cords, when the rolling work for tire manufacturing is carried out, the side line is pressed to form a closer contact with the seam, so that the rubber penetrability into the steel cord is lowered, and the rubber adhesion rate at the seam side is reduced, thereby reducing tire durability. there was.

이를 해결하기 위하여 심측으로의 고무침투력을 향상시키기 위하여 여러 가지 방법들이 제시되고 있다.In order to solve this problem, various methods have been proposed to improve rubber penetration into the core.

특히 일본공개특허번호 평6-33382에서는 심선을 편평가공하여 그 편평비 (장경/단경)가 1.3이상이 되도록 하여 고무침투성을 향상시키는 시키는 방안을 제안하기도 하였다.In particular, Japanese Unexamined Patent Publication No. Hei 6-33382 proposed a method of improving the rubber penetration property by flattening the core wire so that its flat ratio (long diameter / short diameter) is 1.3 or more.

또한 일본공개특허번호 평9-256283에서는 심선 연선시 1가닥에 프리폼(Preform) 형상을 부여하여 측선 간의 공간을 만들어 스틸코드 내부로 고무침투 성을 향상시키는 방안을 제안하기도 하였다.In addition, Japanese Patent Application Laid-open No. Hei 9-256283 proposed a method of improving rubber penetration into the steel cord by creating a space between the side lines by giving a preform shape to one strand when stranding a core wire.

그러나 이러한 제안들은 궁극적으로 3+6구조를 유지하고 있어 고무침투성을 획기적으로 개선하는데는 많은 어려움이 있었다.However, these proposals ultimately maintain a 3 + 6 structure, which made it difficult to dramatically improve rubber penetration.

본 발명은 기존 3+6 구조에서 심 선경을 증가시킴과 동시에 심과 측선에서 한가닥씩을 제거한 2+5 구조를 형성하여 심으로의 고무침투성을 획기적으로 개선하여 타이어 제작시 스틸코드의 고무부착률과 나아가서는 타이어의 내구성을 향상시킬 수 있는 스틸코드를 제공하고자 함에 그 목적이 있다.The present invention is to increase the core diameter in the existing 3 + 6 structure and at the same time to form a 2 + 5 structure by removing the strands from the seam and the side line to significantly improve the rubber permeability to the seam, Furthermore, the object is to provide a steel cord that can improve the durability of the tire.

본 발명의 상기 목적은 심선 2가닥과 직경이 심선의 1.4 ~ 2.0배인 측선 5가닥을 연선 하되 심 2가닥을 먼저 꼬임을 형성한 후 측선과 연선 하는, 즉 2단계의 연선을 통하여 꼬임 방향이 반대인 스틸코드를 제조함으로써 달성할 수 있다. (도 1참조)The object of the present invention is to twist the two strands and the strand 5 strands of 1.4 ~ 2.0 times the diameter of the core and twisted the core 2 strands first and then twisted with the side line, that is, the twist direction is reversed through the twisted two-stage strand This can be achieved by manufacturing phosphor steel cord. (See Fig. 1)

본 발명의 기술적 특징은 첫째, 측선의 직경이 심선 직경 대비 1.4 ~ 2.0배이어야 한다는 것이다. 측선의 직경이 심선 직경의 1.4배보다 작으면 측선이 심선 주위에 균일하게 분포되지 않고 한쪽으로 치우치는 꼬임 상태 불량이 발생하게 된다. 또한 측선의 직경이 심선 직경의 2.0배보다 크면 심선으로의 고무침투를 측선이 방해하여 고무침투성이 떨어지는 결과를 가져올 수 있다.Technical feature of the present invention is that, first, the diameter of the side line should be 1.4 ~ 2.0 times the core diameter. If the sideline diameter is smaller than 1.4 times the core diameter, the sideline is not uniformly distributed around the coreline, but a twisted state defect that is biased to one side occurs. In addition, when the diameter of the side line is larger than 2.0 times the core diameter, the side line may interfere with the rubber penetration into the core line, which may result in a decrease in rubber penetration.

둘째, 심선에 먼저 S방향으로 꼬임을 형성한 후 측선은 Z방향으로 연선 하는 방법을 통하여 심과 측선의 꼬임 방향이 다르게 하여 고무침투성을 더욱 향상시킨 다.Second, after forming the twist in the S direction first in the core line, the side line is twisted in the Z direction by the twist direction of the seam and the side line is different to further improve the rubber permeability.

본 발명에 있어서 심선과 측선의 직경은 0.1~ 0.4mm의 범위 내에 있는 것이 좋다. 심선의 직경이 0.1mm미만이면 심선을 제조하는데 어려움이 있고, 측선의 직경이 0.4mm를 초과하면 코드경이 커져서 고무사용량이 많아지므로 타이어 제조시에 원가를 상승시킨다.In the present invention, the diameter of the core wire and the side wire may be in the range of 0.1 to 0.4 mm. If the diameter of the core wire is less than 0.1mm, it is difficult to manufacture the core wire, and if the diameter of the side wire exceeds 0.4mm, the cord diameter becomes larger and the amount of rubber used increases, thereby increasing the cost during tire manufacturing.

아래 [표 1] 은 본 발명과 종래기술에 따른 스틸코드의 일반물성을 비교한 것이며, [표 2]는 본 발명과 종래기술에 따른 스틸코드 내부로의 고무침투성을 비교한 것이다.Table 1 below compares the general physical properties of steel cords according to the present invention and the prior art, and Table 2 compares rubber penetrability into steel cords according to the present invention and the prior art.

이하에서 실시예를 들어 본 발명을 보다 상세히 설명하나, 하기의 실시예는 설명의 목적을 위한 것으로 본 발명의 청구범위를 제한하기 하기 위한 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to Examples, but the following Examples are for the purpose of explanation and are not intended to limit the scope of the present invention.

1) 실시예1) Example

탄소함량이 0.82%인 탄소강 선재를 인발가공, 열처리 및 황동도금을 실시하고 다시 직경 0.25mm 및 0.35mm로 각각 최종 신선을 한 후 심2본을 먼저 S방향으로 연선한 다음 다시 측선5본과 같이 Z방향으로 연선가공 하여 심선과 측선의 꼬임 방향이 반대인 2×0.25 + 5×0.35 구조의 스틸코드를 생산하고 그 물성을 시험한 결과를 [표1], [표2]에 나타내었다.After drawing, heat-treating and brass plating the carbon steel wire with 0.82% of carbon, and final drawing again with diameter of 0.25mm and 0.35mm respectively, strand 2 cores first in S direction, and then again The stranded wire in the Z direction produced 2 × 0.25 + 5 × 0.35 steel cords with opposite twisting directions of core and side wires. The results of the test were shown in [Table 1] and [Table 2].

2) 비교예2) Comparative Example

탄소함량이 0.82%인 탄소강 선재를 인발가공, 열처리 및 황동도금을 실시하고 다시 직경 0.20mm 및 0.35mm로 각각 최종 신선을 한 후 심3본을 먼저 S방향으로 연선한 다음 다시 측선6본과 같이 Z방향으로 연선가공하여 심선과 측선의 꼬임 방향이 반대인 3×0.20 + 6×0.35 구조의 스틸코드를 생산하고 그 물성을 시험한 결과를 [표1], [표2]에 나타내었다. After drawing, heat-treating and brass plating the carbon steel wire with 0.82% of carbon content and again final drawing with 0.20mm and 0.35mm diameter respectively, stranded 3 cores in the S direction first, and then again The stranded wire in the Z direction produced 3 × 0.20 + 6 × 0.35 steel cords with opposite twisting directions between core and side wires. The results of the test were shown in [Table 1] and [Table 2].

Figure 112006070189870-pat00001
Figure 112006070189870-pat00001

Figure 112006070189870-pat00002
Figure 112006070189870-pat00002

* 이층연 스틸코드의 경우 압연작업 시 측선에 압력을 받아 측선이 심과 더욱 밀착하는 경향이 있어 비교예의 경우 심측으로의 고무침투성이 특히 불량함.* In case of double layered steel cord, the side line tends to be in close contact with the seam due to the pressure on the side line during rolling, so the rubber penetration into the core side is particularly poor in the comparative example.

표 2에서 L ; 측선의 중심을 통과하는 궤적의 선길이.L in Table 2; The line length of the trajectory passing through the center of the sideline.

이상 살펴본 바와 같이 본 발명에 따르면, 심선으로의 고무침투성이 좋아 심선의 고무 부착률을 높일 수 있기 때문에 타이어 제작시 스틸코드의 부식이 방지 되어서 타이어의 내구성을 향상시킬 수 있다. As described above, according to the present invention, the rubber permeability to the core wire is good, so that the rubber adhesion rate of the core wire can be increased, thereby preventing the corrosion of the steel cord when manufacturing the tire, thereby improving the durability of the tire.

또한 기존의 3+6 구조의 스틸코드 보다 코드경이 작으므로 압연 작업시 고무 사용량을 감소시킬 수 있어 타이어 제조시 원가절감 효과도 기대할 수 있다.In addition, since the cord diameter is smaller than that of the steel cord of the existing 3 + 6 structure, the amount of rubber used during rolling can be reduced, and thus, a cost reduction effect can be expected when manufacturing tires.

Claims (3)

차량용 타이어의 고무제품 보강용으로 사용되는 스틸코드로서,Steel cord used to reinforce rubber products for vehicle tires. 심선(직경 d1) 2가닥과 측선(d2) 5가닥으로 구성되는 2xd1 + 5xd2 의 꼬임구조를 가지며, 심선과 측선의 꼬임 방향이 서로 반대인 것을 특징으로 하는 2+5 구조의 차량용 타이어용 스틸코드.Steel cord for vehicle tires of 2 + 5 structure having a twist structure of 2xd1 + 5xd2 composed of two strands of core (diameter d1) and five strands of sideline (d2), and the twisting directions of the core and sidelines are opposite to each other. . 제1항에 있어서, 측선의 선경이 심선의 선경 대비 140% ~ 200%인 것을 특징으로 하는 차량용 타이어용 스틸코드.The steel cord for a vehicle tire according to claim 1, wherein the wire diameter of the side wire is 140% to 200% of the wire diameter of the core wire. 제1항에 있어서, 스틸코드는 심선과 측선의 직경이 0.1~0.4mm의 범위 내에 있는 것을 특징으로 하는 차량용 타이어용 스틸코드. The steel cord for a vehicle tire according to claim 1, wherein the steel cord has a diameter of the core wire and the side wire within a range of 0.1 to 0.4 mm.
KR1020060093955A 2006-09-27 2006-09-27 2+5 type steel cord for tire of vehicle. KR101222403B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0524408A (en) * 1991-07-19 1993-02-02 Kokoku Kousensaku Kk Tire
KR20030041072A (en) * 2001-11-19 2003-05-23 한국타이어 주식회사 Steel cord for use in pneumatic radial tire
KR20050050765A (en) * 2003-11-26 2005-06-01 한국타이어 주식회사 Steel code for pneumatic radial tire
JP2005179878A (en) 2003-12-23 2005-07-07 Hongduk Steel Cord Co Ltd Tire carcass-reinforcing ultrafine wire steel cord and passenger car radial tire to which the same is applied

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0524408A (en) * 1991-07-19 1993-02-02 Kokoku Kousensaku Kk Tire
KR20030041072A (en) * 2001-11-19 2003-05-23 한국타이어 주식회사 Steel cord for use in pneumatic radial tire
KR20050050765A (en) * 2003-11-26 2005-06-01 한국타이어 주식회사 Steel code for pneumatic radial tire
JP2005179878A (en) 2003-12-23 2005-07-07 Hongduk Steel Cord Co Ltd Tire carcass-reinforcing ultrafine wire steel cord and passenger car radial tire to which the same is applied

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