KR100302244B1 - Weft for tire cord and tire cord cloth produced from the same - Google Patents

Weft for tire cord and tire cord cloth produced from the same Download PDF

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Publication number
KR100302244B1
KR100302244B1 KR1019940015018A KR19940015018A KR100302244B1 KR 100302244 B1 KR100302244 B1 KR 100302244B1 KR 1019940015018 A KR1019940015018 A KR 1019940015018A KR 19940015018 A KR19940015018 A KR 19940015018A KR 100302244 B1 KR100302244 B1 KR 100302244B1
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South Korea
Prior art keywords
weft
tire cord
tire
yarn
cord
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KR1019940015018A
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Korean (ko)
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KR960001241A (en
Inventor
이상민
김세훈
서정균
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구광시
주식회사 코오롱
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Priority to KR1019940015018A priority Critical patent/KR100302244B1/en
Publication of KR960001241A publication Critical patent/KR960001241A/en
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Publication of KR100302244B1 publication Critical patent/KR100302244B1/en

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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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/084—Heating filaments, threads or the like, leaving the spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/096—Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes
    • 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
    • D02G3/36—Cored or coated yarns or threads
    • 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
    • D02G3/38—Threads in which fibres, filaments, or yarns are wound with other yarns or filaments, e.g. wrap yarns, i.e. strands of filaments or staple fibres are wrapped by a helically wound binder yarn
    • 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
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
    • 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

Abstract

PURPOSE: Provided are weft for tire cord having high breaking elongation ratio and tire cord cloth produced from the tire cord, having uniform warp density without a pick cord breaker process. CONSTITUTION: Polyamide undrawn yarn produced out of polyamide polymer having at least 2.8 of relative viscosity is characterized by having 15x10¬-3 - 40x10¬-3 of birefringence(Δn), from 200% to 350% of breaking elongation and 100-200denier of fineness. The weft for the tire cord is obtained by covering the polyamide undrawn yarn with cotton yarn on 600-1000TPM. The tire cord cloth woven out of the weft is characterized by having from 120% to 300% of breaking elongation and from 120g to 300g of breaking strength after a heating process.

Description

타이어 코드용 위사 및 그로부터 제조된 타이어코드지Weft for tire cords and tire cord paper made therefrom

본 발명은 타이어 코드용 위사 및 그로부터 제조된 타이어 코드지에 관한 것으로서, 더욱 상세하게는 래디알 타이어의 제조시에 고무 보강재료로 사용되는 타이어 코드지용 위사로 제조된 타이어코드지에 관한 것으로 특히, 절단 신장율이 매우 높은 타이어 코드용 위사에 관한 것이다.The present invention relates to a weft for tire cords and tire cord papers produced therefrom, and more particularly, to a tire cord paper made of tire cord paper weft yarns used as rubber reinforcing materials in the manufacture of radial tires. This is a weft for a very high tire cord.

일반적으로 래디알타이어에 있어서 주 보강재료인 타이어 코드지는 타이어의 주행방향과 직각방향으로 배열되어 있는데, 만일 타이어의 원주를 따라서 경사의 배열도가 불균일 할 경우에는 경사밀도가 적은 부위의 고무층이 집중적으로 하중을 받게되고 이 부분이 공기 팽창 압력에 의하여 부풀어져 타이어를 파괴시키는 원인이 되고 있다. 그러므로 래디알 타이어는 그 내부에서 보강작용을 하는 타이어 코드지의 경사밀도를 균일하게 유지시켜 주는 일이 매우 중요하다.In general, tire cords, which are the main reinforcing materials in radial tires, are arranged in a direction perpendicular to the running direction of the tire. If the arrangement of the inclinations is uneven along the circumference of the tire, the rubber layer at the portion having the low inclination density is concentrated. It is subjected to a load, and this part is inflated by the air inflation pressure, which causes the tire to be destroyed. Therefore, it is very important for the radial tire to keep the inclination density of the tire cord paper which reinforces therein uniformly.

예를 들어 래디얼타이어용 타이어코드지는 폴리에스테르사를 경사로 하고 절단실장율이 낮은(최고 10%) 면사를 위사로 사용하기도 하나, 타이어제조시 경사밀도를 균일하게 유지시키기 위하여 타이어코드지에 고무를 얇게 입히는 토핑(topping) 공정시에 타이어코드 경사를 지지하고 있는 위사를 부분적으로 절단시키기 위하여 픽 코드 브레이커(Pick Cord Breaker)를 사용하여 왔다. 그러나 위와 같은 위사절단 공정을 거치더라도 경사밀도의 균일성을 유지시키기 힘들 뿐만아니라 절단공정에 따르는 공정의 복잡성 때문에 생산성이 떨어지는 문제점이 있었다.For example, tire cords for radial tires may use polyester yarn as the incline and cotton yarn with a low cutting rate (up to 10%) as the weft yarn. Pick Cord Breakers have been used to partially cut the weft holding the tire cord slope during the coating topping process. However, even after the weft cutting process as described above, not only the uniformity of the inclined density is difficult to maintain, but also there is a problem in that productivity decreases due to the complexity of the process according to the cutting process.

따라서, 본 발명은 높은 생산성으로 균일한 경사밀도를 갖는 타이어코드지를 제공하는 것을 목적으로 한다.Therefore, an object of the present invention is to provide a tire cord paper having a uniform inclination density with high productivity.

상기한 목적을 달성하기 위한 본 발명자의 연구에서 타이어의 2차 성형공정시 타이어가 공기의 압력으로 팽창될 때 경사를 지지하고 있는 위사도 같이 신장하여 경사밀도를 균일하게 유지시켜줄 수 있는 고절단신장율을 가지는 타이어코드지용 위사를 개발함으로써 타이어 토핑공정중 위사를 절단시키기 위한 픽 코드 브레이커 공정이 필요없이 균일한 경사밀도를 갖는 타이어 코드지를 제공할 수 있게 되었다.In the study of the present inventors to achieve the above object, the high cutting elongation rate that can maintain the inclination density uniformly by extending the weft that supports the inclination when the tire is inflated by the air pressure during the secondary molding process of the tire By developing the weaving yarn for tire cord paper having a has been able to provide a tire cord paper having a uniform inclination density without the need for a pick cord breaker process for cutting the weft yarn during the tire topping process.

제1도는 본 발명에 따르는 위사가 적용된 타이어코드지에서 경사가 균일하게 배열된 상태를 설명하기 위한 단면도.1 is a cross-sectional view illustrating a state in which the inclination is uniformly arranged in the tire cord paper to which the weft yarn according to the present invention is applied.

제2도는 본 발명의 범위에서 벗어난 절단신도와 강력을 갖는 위사가 적용된 타이어코드지에서 경사가 지그재그형태로 불균일하게 배열된 상태를 설명하기 위한 단면도.2 is a cross-sectional view for explaining a state in which the inclination is unevenly arranged in a zigzag form in the tire cord paper to which the cutting elongation and the strength of the weft yarn which is out of the scope of the present invention are applied.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1: 위사 2 : 경사코드1: weft 2: warp cord

그러므로 본 발명에 의하면, 상대점도 2.8 이상의 폴리아미드 폴리머를 이용하여 제조된 복굴절(△n)이 15× 10-3~40×10-3이고 절단신도가 200% 이상 350% 이하이며, 섬도는 100∼200 데니어인 폴리아미드 미연신사에 면사를 600∼1,000 TPM으로 피복한 것을 특징으로 하는 타이어 코드용 위사가 제공된다.Therefore, according to the present invention, the birefringence (Δn) prepared using a polyamide polymer having a relative viscosity of 2.8 or more is 15 × 10 −3 to 40 × 10 −3, and the elongation at break is 200% or more and 350% or less, and the fineness is 100 A tire cord weft yarn is provided, wherein a polyamide unstretched yarn having a thickness of ˜200 denier is coated with a cotton yarn at 600 to 1,000 TPM.

또한 본 발명에 의하면, 상기한 타이어 코드용 위사를 사용하여 제직한 것을 열처리 하였을 때 상기 코드용 위사의 절단신도가 120% 이상 300% 이하이며 절단강력이 120g 이상 300g 이하인 것을 특징으로 하는 타이어 코드지가 제공된다.Further, according to the present invention, when the heat treatment of the woven using the tire cord weft yarn described above, the cord elongation of the cord weft yarn is 120% or more and 300% or less and the cutting strength is 120g or more and 300g or less. Is provided.

이하, 본 발명을 보다 상세하게 설명하기로 한다.Hereinafter, the present invention will be described in more detail.

본 발명에 따르는 타이어 코드용 위사는 심사인 폴리아미드 미연신사를 면사로 피복한 구조를 갖는다. 피복사로 면사를 사용하는 이유는 비용융성이며, 그 표면이 매끄럽지 않아서 경사를 강력하게 잡아줄 수 있고, 열처리시 라텍스가 심사까지 침투하여 신장율을 저하시키는 것을 방지할 수 있기 때문이다. 또한 피복사의 꼬임수는 600∼1,000TPM으로 하여야 하는데, 그 이유는 꼬임수 범위내에서 면사로 피복하여야 만 심사인 폴리아미드 미연신사 고유의 저배향성과 고신장율 특성이 상실되지 않기 때문이다. 바람직하게 면사의 혼합량은 위사 전 중량에 대하여 30∼45 중량% 범위가 적당하다.The weft for tire cord according to the present invention has a structure in which a polyamide unstretched yarn, which is a screening, is coated with a cotton yarn. The reason why the cotton yarn is used as the coated yarn is because it is inflexible and its surface is not smooth, so that the warp yarn can be strongly held and the latex can be prevented from penetrating into the screening during the heat treatment to lower the elongation rate. In addition, the number of twists of the coated yarns should be 600 to 1,000 TPM because the low orientation and high elongation characteristics inherent in the polyamide unstretched yarns should not be lost unless the coated yarns are covered with cotton yarns within the twisted ranges. Preferably, the blended amount of cotton yarn is in the range of 30 to 45% by weight relative to the total weight of the weft yarn.

본 발명 위사에 있어서, 심사인 폴리아미드 미연신사는 원료로서 상대점도 2.8 이상의 폴리아미드를 사용하여 제조한다. 원료인 폴리아미드의 상대점도가 2.8 미만인 경우 얻어지는 미연신사의 절단신도와 강도가 낮아 고신도 위사로 적용하기 곤란해지며, 후처리 공정에서 열노화가 커져 강력과 신도가 급격히 저하되므로 좋지 않다.In the weft yarn of the present invention, polyamide unstretched yarn, which is a screening yarn, is produced using polyamide having a relative viscosity of 2.8 or more as a raw material. When the relative viscosity of the raw material polyamide is less than 2.8, it is difficult to apply the high-strength weft due to low cutting elongation and strength of the undrawn yarn obtained, and it is not good because the heat aging increases in the post-treatment process and the strength and elongation rapidly decrease.

바람직하게 본 발명의 타이어코드용 위사를 구성하는 폴리아미드 심사는 복굴절(△n)이 15×10-3~40× 10-3이고 절단신도가 200% 이상 350% 이하이며, 섬도는 100∼200 데니어인 폴리아미드 미연신사이다.Preferably, the polyamide screening of the tire cord weft yarn of the present invention has a birefringence (Δn) of 15 × 10 −3 to 40 × 10 −3 , an elongation at break of 200% to 350%, and a fineness of 100 to 200. It is a polyamide unstretched yarn which is denier.

상기한 조건을 만족하는 폴리아미드 심사는 상대점도 2.8 이상의 폴리아미드 폴리머를 방사속도 700∼1,300MPM에서 미연신 상태로 제조하는 것에 의해 달성될수 있다. 방사속도가 700MPM 미만인 경우 절단신도는 350% 이상이 되며, 1,300MPM를 초과할 경우 복굴절(△n)이 급격히 증가하여 절단신도 200% 이상을 달성하기 어렵게 된다. 또한 방사속도 700MPM 미만에서 제조한 폴리아미드 미연신사를 심사로 하는 코드용 위사는 타이어코드 제직후 열처리하였을 때 절단강력 120g을 달성하기가 어렵고 절단신도는 300% 이상이 되며, 1,300MPM를 초과하는 방사속도에서 제조한 폴리아미드 미연신사를 심사로 하는 코드용 위사는 타이어코드 제직후 열처리하였을 때 절단신도 120% 이상을 달성하기 어렵고 절단강력이 300g을 초과하게 되어 바람직스럽지 못하다.Polyamide screening that satisfies the above conditions can be achieved by producing a polyamide polymer having a relative viscosity of 2.8 or higher in the unstretched state at a spinning speed of 700 to 1,300 MPM. When the spinning speed is less than 700MPM, the elongation at break is 350% or more, and when 1,300MPM is exceeded, the birefringence (Δn) increases rapidly, making it difficult to achieve more than 200%. In addition, the weft for cords with polyamide unstretched yarns manufactured at a spinning speed of less than 700 MPM is difficult to achieve 120g of cutting strength when heat treated after weaving tire cords, and the breaking elongation is 300% or more, and the yarns exceed 1,300MPM. Cord weft yarns with polyamide unstretched yarns produced at speed are difficult to achieve more than 120% of cut elongation when heat treated after weaving tire cords, and the cutting strength exceeds 300 g, which is undesirable.

본 발명의 타이어 코드 위사는 타이어 코드지로 제직되어 고온(230℃ 이상)의 열처리 공정을 거치게 되는데 이 공정중 열노화로 신도와 강력이 떨어지게 된다. 따라서, 타이어 코드지의 위사로 적용하기 위하여 적정한 신율과 강력이 필요한데, 열처리후 위사의 절단신도가 300% 보다 높고 강력(신율에 반비례)이 120g 보다 낮을 경우 이러한 위사를 이용하여 코드지 제직시 자체 변형율이 높아 열처리 후에 타이어코드지의 폭변화가 심하여 균일한 제품을 만들기 힘들며, 반대로 열처리후 강력이 300g 보다 높고 절단신도(강력에 반비례)가 120% 보다 낮을 경우 제2도에 나타낸 바와 같이 타이어 토핑공정에서 위사(1)가 경사코드(2)를 균일하게 배열시키지 못하고 지그재그(zigzag) 현상 및 경사 배열 불균일 현상을 발생시켜 타이어의 중요 관리품질인 유니포미티(uniformity)를 저하시킨다.The tire cord weft of the present invention is woven into a tire cord paper and subjected to a heat treatment process at a high temperature (over 230 ° C.). Therefore, the proper elongation and strength is required to apply the tire cord as a weft yarn. When the weaving elongation of the weft yarn is higher than 300% and the strength (inversely proportional to the elongation) is lower than 120g after heat treatment, the strain rate when weaving the cord paper using the weft yarn is It is difficult to make a uniform product because the width of tire cord paper is high after heat treatment. On the contrary, when the strength is higher than 300g and the cutting elongation (inversely to strength) is lower than 120% after heat treatment, as shown in FIG. The weft yarn 1 does not uniformly arrange the inclined cords 2 but causes a zigzag phenomenon and an inclined arrangement unevenness, thereby lowering the uniformity, which is an important management quality of the tire.

이상 설명한 바와 같이 본발명에 따라 고절단신장율을 가지는 위사를 사용한 타이어코드지는 타이어의 2차 성형공정시 타이어가 공기의 압력으로 팽창될 때(1차성형시의 직경보다 약 170-180% 커짐) 경사를 지지하고 있는 위사도 같이 신장하여 경사밀도를 균일하게 유지시켜 주게 된다.As described above, tire cords using a weft yarn having a high cutting elongation according to the present invention are used when the tire is inflated by air pressure during the second molding process of the tire (about 170-180% larger than the diameter during the first molding). The weft supporting the warp also extends to maintain the warp density uniformly.

이하, 본 발명을 실시예를 통하여 더욱 구체적으로 설명하겠는 바, 본 발명이 실시예에 의하여 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by Examples.

[실시예 1]Example 1

상대점도가 2.8∼3.1인 폴리아미드 66 건조칩을 285∼290℃의 온도에서 용융 방사하여 280℃의 가열통에서 배향시킨 후 즉시, 냉각존을 통과시켜 냉각시킨 후 방사통을 통과시키고 오일로울러에서 광물유 오일을 부착하여 급유된 필라멘트를 얻었다. 이때 오일부착량은 0.6∼1.0% 수준이 되도록 하였다. 급유된 필라멘트를 고뎃로울러를 거쳐 권취기에서 700∼1,200m/분 속도로 권취하여 고신축 폴리아미드 미연신 필라멘트를 제조하였다. 제조된 폴리아미드 미연신 필라멘트를 정방기에 걸어서 심사로 공급하면서 심사 주위에 드래프트된 면사를 600∼1,000 TPM으로 피복시켜 고신장 특성을 가진 타이어코드용 위사를 제조하였다. 제조된 위사의 열처리 후 물성을 시험한 결과, 절단강력 183g, 절단신도198%이었다.Polyamide 66 dry chips having a relative viscosity of 2.8 to 3.1 are melt spun at 285 to 290 ° C and oriented in a heating bath at 280 ° C. Immediately after passing through a cooling zone, they are cooled and then passed through a spinning container and mineral oil in an oil roller. Oil was attached to obtain refueled filaments. At this time, the oil deposition amount was set to 0.6 to 1.0%. The lubricated filament was wound at a speed of 700 to 1,200 m / min in a winder through a high roller to prepare a highly stretched polyamide unstretched filament. The prepared polyamide unstretched filament was supplied to the screening machine on a spinning machine, and the cotton yarn drafted around the screening was coated with 600 to 1,000 TPM to prepare a weft cord for tire cords having high elongation characteristics. As a result of testing the physical properties after the heat treatment of the prepared weft yarn, the cutting strength was 183 g and the elongation at break was 198%.

제조된 위사와 폴리에스테르 경사코드를 사용하여 타이어 코드지를 제직한 다음 열처리 공정에서 접착제(레조시놀-포르말린-라텍스 혼합액)을 묻힌 후 150℃ 에서 건조시키고 240℃에서 열고정을 실시하였다.After weaving the tire cord using the prepared weft and polyester warp cord, the adhesive (resorcinol-formalin-latex mixed solution) was applied in the heat treatment process, dried at 150 ° C, and heat-set at 240 ° C.

제조된 타이어 코드지는 타이어 토핑공정에서 제1도와 같이 위사(1)가 경사코드(2)를 균일하게 배열시켜 타이어의 중요 관리품질인 유니포미티(uniformity)가 우수한 타이어의 제조를 가능하게 하였다.The manufactured tire cord paper allows the weft yarn 1 to uniformly arrange the inclined cords 2 as shown in FIG. 1 in the tire topping process, thereby enabling production of a tire having excellent uniformity, which is an important management quality of the tire.

[실시예 2∼4]EXAMPLES 2-4

폴리아미드 미연신사의 방사조건과 피복사의 꼬임수를 표 1에 나타낸 바와같이 변경한 것을 제외하고는 실시예와 동일하게 실시하였다. 열처리후의 위사의 물성 측정결과는 표 1에 제시된다. 또한 각 예의 타이어 코드지는 타이어 토핑공정에서 제1도와 같이 위사(1)가 경사코드(2)를 균일하게 배열시키는 것으로 나타났다.The same conditions as in Example were conducted except that the spinning conditions of the polyamide undrawn yarn and the number of twists of the coated yarn were changed as shown in Table 1. The measurement results of the properties of the weft after heat treatment are shown in Table 1. In addition, the tire cord paper of each example was found to arrange the warp cord 2 uniformly as the weft yarn 1 in the tire topping process.

[비교예 1∼4][Comparative Examples 1 to 4]

폴리아미드 미연신사의 방사조건과 피복사의 꼬임수를 표 1에 나타낸 바와같이 변경한 것을 제외하고는 실시예와 동일하게 실시하였다. 열처리후의 위사의 물성 측정결과는 표 1에 제시된다. 또한 각 예의 타이어 코드지는 타이어 토핑공정에서 제2도와 같이 위사(1)가 경사코드(2)를 균일하게 배열시키지 못하고 지그재그(zigzag) 현상 및 경사 배열 불균일 현상을 발생시켜 타이어의 중요 관리품질인 유니포미티(uniformity)를 저하시키는 것으로 나타났다.The same conditions as in Example were conducted except that the spinning conditions of the polyamide undrawn yarn and the number of twists of the coated yarn were changed as shown in Table 1. The measurement results of the properties of the weft after heat treatment are shown in Table 1. In addition, in the tire topping process, the tire cord of each example does not arrange the warp cords 2 evenly as shown in FIG. 2, but causes zigzag phenomenon and warp arrangement unevenness. It has been shown to lower the uniformity.

[표 1]TABLE 1

이상 설명한 바와 같이 본 발명에 따르는 고절단신장율을 가지는 타이어코드용 위사는 토핑공정중 위사를 절단시키기 위한 픽 코드 브레이커 공정이 필요없이 균일한 경사밀도를 갖는 타이어 코드지를 제조를 가능하게 한다.As described above, the weaving yarn for tire cords having a high cutting elongation rate according to the present invention enables the production of tire cord paper having a uniform inclination density without the need for a pick cord breaker process for cutting the weft yarns during the topping process.

Claims (2)

상대점도 2.8 이상의 폴리아미드 폴리머를 이용하여 제조된 복굴절(△n)이 15×10-3~40×10-3이고 절단신도가 200% 이상 350% 이하이며, 섬도는 100∼200 데니어인 폴리아미드 미연신사에 면사를 600∼1,000 TPM으로 피복한 것을 특징으로 하는 타이어 코드용 위사.Polyamides having a birefringence (Δn) made from a polyamide polymer having a relative viscosity of 2.8 or higher of 15 × 10 −3 to 40 × 10 −3 , an elongation at break of 200% to 350%, and a fineness of 100 to 200 deniers. A weaving cord for tire cords, wherein undrawn yarn is coated with cotton yarn at 600 to 1,000 TPM. 상기 청구항 1 기재의 타이어 코드용 위사를 사용하여 제직되며, 열처리 하였을 때 상기 코드용 위사의 절단신도가 120% 이상 300% 이하이며 절단강력이 120g 이상 300% 이하인 것을 특징으로 하는 타이어 코드지.A tire cord paper which is woven using the tire cord weft yarn of claim 1, wherein when the heat treatment is performed, the elongation at break of the cord weft yarn is 120% or more and 300% or less and the cutting strength is 120g or more and 300% or less.
KR1019940015018A 1994-06-28 1994-06-28 Weft for tire cord and tire cord cloth produced from the same KR100302244B1 (en)

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