KR20090058652A - Method of producing rubber products using a twisted flat steel cord - Google Patents

Method of producing rubber products using a twisted flat steel cord Download PDF

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KR20090058652A
KR20090058652A KR1020070125339A KR20070125339A KR20090058652A KR 20090058652 A KR20090058652 A KR 20090058652A KR 1020070125339 A KR1020070125339 A KR 1020070125339A KR 20070125339 A KR20070125339 A KR 20070125339A KR 20090058652 A KR20090058652 A KR 20090058652A
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South Korea
Prior art keywords
steel cord
rubber
wire
diameter
steel
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KR1020070125339A
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Korean (ko)
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KR101388368B1 (en
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박병권
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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
    • 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
    • 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
    • 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
    • D10B2401/00—Physical properties
    • D10B2401/06—Load-responsive characteristics
    • D10B2401/063—Load-responsive characteristics high strength
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Ropes Or Cables (AREA)
  • Tires In General (AREA)

Abstract

A manufacturing method of a rubber product using single steel cords is provided to improve workability by restricting inclined rotation of the steel cord when the steel cord is laid in rubber. In a manufacturing method of a rubber product using single steel cords, single steel cord of a clockwise direction and the single steel cord of a counter clockwise direction are arranged alternately. A diameter ratio of the steel cord is 0.57~0.95, and a twisted period is ~100 times of the diameter ratio. The tensile strength of the steel cord is 250~450 kg/mm^2. An arrangement interval of the steel cord is 0.3mm.

Description

편평 나선형 단선 스틸코드를 이용한 고무제품의 제조방법 { Method of producing rubber products using a twisted flat steel cord }{Method of producing rubber products using a twisted flat steel cord}

본 발명은 편평 나선형 단선 스틸코드를 이용한 고무제품의 제조방법에 관한 것이다.The present invention relates to a method for producing a rubber product using a flat spiral single wire steel cord.

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 우수하므로 타이어 보강재로 특히 널리 사용되고 있으며 그 사용량도 날로 증가하는 추세에 있다.Steel cord is a tire reinforcing material because it has excellent strength, modulus, heat resistance, heat transfer rate, fatigue resistance and rubber adhesiveness among various kinds of reinforcing materials used to reinforce various rubber products including tires and industrial belts of vehicles. In particular, it is widely used and its usage is also increasing day by day.

스틸코드는 일반적으로 탄소함량이 0.6~0.95중량%인 탄소강으로 된 직경이 5.0~5.5mm인 와이어로드를 직경 1.0~2.5mm로 1차 신선 가공한 후 열처리 및 황동도금을 실시하고 다시 최종 신선을 하여 직경 0.1~0.4mm, 강도 280~380kg/㎟의 필라멘트 여러 가닥을 용도에 따라 다양한 구조(1×2, 1×3, 2+2, 2+7, 3+6, 3+8, 3+9+15, 1+18, 3/8+13 등)로 연선 가공하여 제조된다.Steel cords are usually wire drawn from 5.0 to 5.5mm in diameter with carbon steel with carbon content of 0.6 ~ 0.95% by weight. Various strands of filament with a diameter of 0.1 ~ 0.4mm and strength of 280 ~ 380kg / mm2 (1 × 2, 1 × 3, 2 + 2, 2 + 7, 3 + 6, 3 + 8, 3+ 9 + 15, 1 + 18, 3/8 + 13 and the like).

승용차용 레디얼 타이어의 벨트 층에는 1×2, 1×3, 2+2 구조의 스틸코드가 일반적으로 사용되고 있는데 이러한 구조의 스틸코드는 높은 강성을 가지지만 노면 이 울퉁불퉁한 비포장 도로에서는 타이어의 반발력이 지나치게 강해져 승차감이 좋지 않다. 또, 인접한 필라멘트끼리 서로 접촉한 상태로 결합 되어 있으므로 스틸코드 내부에 미세한 공극이 존재하게 되고, 그 결과 타이어 주행시 고무 사이로 수분이 침투될 때 강선의 부식을 유발하여 고무와 스틸코드 간 접착층을 급격히 손상시키는 문제가 있다.Steel cords of 1 × 2, 1 × 3, and 2 + 2 structures are commonly used in the belt layer of radial tires for passenger cars. The steel cords of such structures have high stiffness but the repulsive force of tires on uneven roads with uneven roads It's too strong and the ride is not good. In addition, because the adjacent filaments are bonded to each other in contact with each other, fine voids exist in the steel cord, and as a result, when the water penetrates the rubber during tire driving, corrosion of the steel wire causes rapid damage to the adhesive layer between the rubber and the steel cord. There is a problem.

또한, 타이어가 변형되거나 진동하면 꼬아 합쳐진 와이어 끼리 서로 마찰을 일으켜서 마모되는 소위 플래팅마모(fretting wear)를 발생시켜서 코드 와이어가 쉽게 피로 파단을 일으키게 되는 문제점이 있다.In addition, when the tire is deformed or vibrated, there is a problem in that the cord wire is easily broken by generating a so-called fretting wear, in which the twisted wires rub together to cause friction.

이들 문제를 해결하기 위해 여러 가닥을 꼬아서 제조한 스틸코드 대신에 한 가닥의 필라멘트로 이루어진 단선 스틸코드가 많이 제안되고 있다. 또한 최근에는 지구 환경보호 등 여러 가지 이유로 자동차 연비개선에 대한 연구가 활발히 진행되어 타이어 경량화가 추진되고 있다. In order to solve these problems, many single wire steel cords having one strand of filament have been proposed instead of steel cords made by twisting multiple strands. In recent years, research on automobile fuel economy improvement has been actively conducted for various reasons such as global environmental protection, and tire weight reduction is being promoted.

따라서 두께가 얇고 가벼운 단선 스틸코드를 개발하는 것이 급선무가 되고 있다.Therefore, the development of thin and light single-wire steel cords is urgently needed.

한국특허번호 10-0318896에서는 편평화 된 단선 스틸코드 자체에 비틀림 응력을 주어 편평 나선형 단선 스틸코드를 제시하고 있지만, 이러한 스틸코드는 한쪽 방향으로만 비틀림 응력을 가하여 나선형태를 부여하기 때문에 타이어 제조를 위하여 고무에 병렬로 매설 후 일정규격으로 절단할 때, 스틸코드의 한쪽 방향 회전성 으로 인해 스틸코드가 매설된 고무 시트의 끝 부분이 뜨는 팁라이징(tip rising) 현상이 자주 발생하며 이러한 현상은 곧 작업성 저하로 이어지게 되는 문제점이 있 다.Korean Patent No. 10-0318896 proposes a flat spiral single wire steel cord by applying a torsional stress to the flattened single wire steel cord itself, but since such steel cords apply a torsional stress in only one direction to give a spiral shape, In order to cut a certain size after embedding in parallel to the rubber, the tip rising of the rubber sheet embedded with the steel cord often occurs due to the rotational direction of the steel cord in one direction. There is a problem that leads to reduced workability.

본 발명은 편평 나선형 단선 스틸코드를 고무에 매설할 때 스틸코드의 꼬임이 한쪽 방향만의 회전성으로 발현되는 것을 억제시켜 타이어 제조시 작업성을 개선하고자 하는데 있다.The present invention is to suppress the twist of the steel cord in the rotational direction of only one direction when embedding the flat spiral single-wire steel cord in the rubber to improve the workability during tire manufacturing.

본 발명은 고무시트에 편평 나선형 단선 스틸코드를 매설할 때 꼬임 방향(S꼬임 및 Z꼬임)이 서로 다른 스틸코드를 교호로 배열시켜서 꼬임에 의한 회전성이 상쇄되도록 한 것이다.According to the present invention, when the flat spiral single-wire steel cord is embedded in a rubber sheet, twisting directions (S twist and Z twist) are alternately arranged so that rotational twist due to twist is canceled out.

본 발명은 스틸코드에 부여된 꼬임으로 인한 회전성이 상쇄되기 때문에 타이어 등 고무제품 제조시에 팁라이즈의 발생을 감소시킬 수 있어서 타이어 등 고무제품의 제조 작업성을 향상시킬 수 있다.The present invention can reduce the occurrence of the tip rise during the production of rubber products such as tires because the rotationality due to the twisting imparted to the steel cord can be reduced, thereby improving the workability of manufacturing rubber products such as tires.

본 발명은 탄소함량이 0.70~1.0%이며, 인장강도가 250~450kg/mm2 이고, 직경이 0.2~1.0mm인 원형 필라멘트를 압착 롤라를 사용하여 단경/장경의 비가 0.57~ 0.95인 편평 면을 가지면서 동시에 비틀림 응력을 부여하여 단경의 2~100배를 주기로 꼬임을 형성한 편평 나선형 단선 스틸코드[도 1의 (가)및 (나)]를 고무시트 내부에 병렬로 배열하여 매설시 나선의 꼬임 방향을 서로 반대가 되도록 S꼬임의 것 과 Z꼬임의 것을 교대로 매설하는 방식으로 스틸코드의 회전성에 따른 고무 시트의 응력분포를 일정하게 하여 팁라이징이 방지되어서 타이어 등 고무제품의 제조 작업성이 개선되도록 한 것이다.According to the present invention, a circular filament having a carbon content of 0.70 to 1.0%, a tensile strength of 250 to 450 kg / mm 2 , and a diameter of 0.2 to 1.0 mm is used for a flat surface having a short diameter / long diameter ratio of 0.57 to 0.95. Flat spiral steel cords (Fig. 1 (a) and (b) in Fig. 1) formed by twisting at 2 to 100 times the short diameter by applying a torsional stress at the same time to the spiral sheet in parallel Manufacturing workability of rubber products such as tires because the stress distribution of the rubber sheet according to the rotationality of the steel cord is constant by embedding the S-twist and Z-twist alternately so that the twist directions are opposite to each other. This is to be improved.

[[ 실시예1Example 1 ] ]

탄소함량이 0.82%, 직경이 5.5mm인 선재(Wire Rod)를 직경이 1.90mm가 되도록 1차 신선한 후 페이턴팅 처리 및 황동 도금을 실시하고 직경이 0.40mm가 되도록 최종 신선을 하여 필라멘트를 준비하였다. 이후 압착을 실시하여 단경/장경의 비가 0.80로 된 편평 필라멘트를 시계방향(S) 및 반시계방향(Z)으로 각각 비틀림 응력을 부여하여 꼬임주기가 20mm가 되도록한 2종의 편평 나선형 스틸코드를 제조하고 이 스틸코드를 교대로 고무에 0.3mm 간격의 병렬로 매설하여 그 물성을 평가한 결과를 [표1]에 나타내었다.Wire rods with a carbon content of 0.82% and a diameter of 5.5mm were firstly freshened to have a diameter of 1.90mm, then subjected to a plating process and brass plating, and the final filament was prepared to have a diameter of 0.40mm. . Afterwards, two types of flat spiral steel cords with twisting periods of 20 mm are given by applying twisting stresses in the clockwise direction (S) and counterclockwise direction (Z). The steel cords were alternately embedded in rubber at 0.3 mm intervals in parallel and the results of the evaluation of the physical properties are shown in [Table 1].

[[ 비교예1Comparative Example 1 ] ]

탄소함량이 0.82%, 직경이 5.5mm인 선재(Wire Rod)를 직경이 1.90mm가 되도록 1차 신선한 후 페이턴팅 처리 및 황동 도금을 실시하고 직경이 0.40mm가 되도록 최종신선을 하여 필라멘트를 준비하였다. 이후 압착을 실시하여 단경/장경의 비가 0.80로 된 편평 필라멘트를 시계방향(S)의 한 방향으로 비틀림 응력을 부여하여 꼬임 주기가 20mm가 되도록 한 편평 나선형 스틸코드를 제조하고 이 스틸코드를 고무에 0.3mm 간격의 병렬로 매설하여 그 물성을 평가한 결과를 [표1]에 나타내었다.Wire rods with a carbon content of 0.82% and a diameter of 5.5mm were first fresh so as to have a diameter of 1.90mm, then subjected to a plating process and brass plating, and the final filaments were prepared to have a diameter of 0.40mm. . After pressing, the flat filament with the short diameter / long diameter ratio of 0.80 was given twisting stress in one direction in the clockwise direction (S) to produce a flat spiral steel cord having a twisting period of 20 mm, and the steel cord was attached to rubber. Table 1 shows the results of evaluating the physical properties by embedding them in parallel at 0.3 mm intervals.

[표1]Table 1

항목  Item 실시예1 Example 1 비교예1 Comparative Example 1 단선 스틸코드      Single wire steel cord 단경 (mm)  Short diameter (mm) 0.36 0.36 0.36 0.36 장경 (mm)  Long diameter (mm) 0.45 0.45 0.45 0.45 편평비  Flat ratio 0.8 0.8 0.8 0.8 꼬임주기 (mm)  Twisting cycle (mm) 20mm, S/Z 방향 20 mm, S / Z direction 20mm, S방향 20mm, S direction 고무 접착성 *  Rubber adhesive * 100 100 100 100 내피로성 *  Fatigue Resistance * 100 100 100 100 고무시트의 팁라이즈 (mm)  Tip rise of rubber sheet (mm) 0mm 0 mm 15mm 15 mm

상기 표1 에서 * 로 표시된 내피로성과 고무 접착성은 종례예를 100으로 하고 이에 대한 상대적인 수치로 나타낸 값이다.Fatigue resistance and rubber adhesiveness indicated by * in Table 1 is a value represented by the relative example to the example 100.

고무 접착성은 ASTM 2229 방법에 의한 고무와의 접착력을 비교시험 하였다.Rubber adhesiveness was tested by comparing the adhesive strength with rubber by ASTM 2229 method.

내피로성 시험은 로테이팅 빔 타입(Rotating Beam type) (Bekaert Engineering사의 내피로성 시험기)을 이용하여 비교 시험하였다.The fatigue resistance test was compared using a rotating beam type (fatigue resistance tester manufactured by Bekaert Engineering).

고무시트 팁라이즈(Tip rise)는 상기 단선 스틸코드를 0.3mm 간격으로 배열후 상하에서 0.6mm 두께의 고무시트를 압착한 후 직사각형으로 절단 후 절단 끝 모서리 부분에서 들뜸 정도를 측정한 값을 비교하였다.The rubber sheet tip rise was compared with the measured values of the lifting edges at the edges of the cutting edges after cutting the rectangular steel cords by crimping up and down 0.6 mm thick rubber sheets after arranging the single-wire steel cords at intervals of 0.3 mm. .

도 1의(가)및 (나)는 본 발명에 따른 스틸코드의 정면도.1 (a) and (b) is a front view of a steel cord according to the present invention.

도 2는 본 발명에 따른 편평나선형 스틸코드가 매설되어 있는 고무시트의 설명도.2 is an explanatory view of a rubber sheet in which a flat spiral steel cord is embedded according to the present invention;

Claims (3)

고무시트의 내부에 편평 나선형 단선 스틸코드를 병열로 매설시킴에 있어서, 시계방향(S)꼬임의 단선 스틸코드와 반시계방향(Z)꼬임의 단선 스틸코드가 교호로 배열되도록 함을 특징으로 하는 편평 나선형 단선 스틸코드를 이용한 고무제품의 제조방법. In embedding the flat spiral single-wire steel cord in parallel in the rubber sheet, the single-wire steel cord of the clockwise (S) twist and the single-wire steel cord of the counterclockwise (Z) twist are arranged alternately. Manufacturing method of rubber product using flat spiral single wire steel cord. 제1항에 있어서, 상기 스틸코드는 단경/장경의 비가 0.57~0.95이고, 꼬임주기는 단경의 2~100배임을 특징으로 하는 편평 나선형 단선 스틸코드를 이용한 고무제품의 제조방법.The method of claim 1, wherein the steel cord has a short diameter / long diameter ratio of 0.57 to 0.95, and a twisting period is 2 to 100 times the short diameter. 제 1항에 있어서, 상기 스틸코드는 인장강도가 250~450 kg/mm2 이고, 선경이 0.2~1.0mm이며 배열간격이 0.3mm임을 특징으로 하는 편평 나선형 단선 스틸코드를 이용한 고무제품의 제조방법.According to claim 1, wherein the steel cord has a tensile strength of 250 ~ 450 kg / mm 2 And a wire diameter of 0.2 to 1.0 mm and an array interval of 0.3 mm.
KR1020070125339A 2007-12-05 2007-12-05 Method of producing rubber products using a twisted flat steel cord KR101388368B1 (en)

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JP3180166B2 (en) * 1992-06-05 2001-06-25 横浜ゴム株式会社 Pneumatic radial tire
JPH08295102A (en) * 1995-04-26 1996-11-12 Sumitomo Rubber Ind Ltd Pneumatic radial tire
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