WO2022231286A1 - Cordon comprenant un composant à base biologique et son procédé de préparation - Google Patents

Cordon comprenant un composant à base biologique et son procédé de préparation Download PDF

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Publication number
WO2022231286A1
WO2022231286A1 PCT/KR2022/005981 KR2022005981W WO2022231286A1 WO 2022231286 A1 WO2022231286 A1 WO 2022231286A1 KR 2022005981 W KR2022005981 W KR 2022005981W WO 2022231286 A1 WO2022231286 A1 WO 2022231286A1
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WO
WIPO (PCT)
Prior art keywords
twisted yarn
cord
tpm
denier
nylon
Prior art date
Application number
PCT/KR2022/005981
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English (en)
Korean (ko)
Inventor
이민호
정일
전옥화
임종하
이성규
Original Assignee
코오롱인더스트리 주식회사
Priority date (The priority date 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 date listed.)
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Publication date
Priority claimed from KR1020220051246A external-priority patent/KR20220149436A/ko
Application filed by 코오롱인더스트리 주식회사 filed Critical 코오롱인더스트리 주식회사
Priority to US18/262,551 priority Critical patent/US20240076810A1/en
Priority to JP2023559720A priority patent/JP2024511515A/ja
Priority to CN202280022952.6A priority patent/CN117043402A/zh
Priority to EP22796119.0A priority patent/EP4276229A1/fr
Publication of WO2022231286A1 publication Critical patent/WO2022231286A1/fr

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Classifications

    • 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
    • D02G3/04—Blended or other yarns or threads containing components made from different materials
    • D02G3/047—Blended or other yarns or threads containing components made from different materials including aramid fibres
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • 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
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/48—Tyre 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
    • 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
    • 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
    • D10B2331/021—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides aromatic polyamides, e.g. aramides
    • 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

Definitions

  • the present application relates to a code containing a bio-derived component and a method for manufacturing the same. Specifically, the present application relates to a first lower twisted yarn formed by giving a twist to a bio-nylon fiber; And it relates to a hybrid cord comprising a second lower twisted yarn formed by imparting twist to a different type of resin fiber different from the bio-nylon, and a method for manufacturing the same.
  • a cord used as a rubber reinforcing material for an automobile tire must satisfy physical properties capable of maintaining the stability and durability of the tire in consideration of the specific driving conditions of the tire.
  • a tire cord must have excellent balance between physical properties such as strength, medium elongation, cut elongation, and dry heat shrinkage, and in addition, it must be able to provide excellent fatigue resistance.
  • high modulus (ie, relatively low elongation) cords are used in such a fatigue environment as above. retention will decrease.
  • having a modulus value as low as possible helps to improve the fatigue resistance performance of the cord, and consequently improves the durability of the tire can be found to help.
  • a cord for a tire reinforcement material may be made by twisting a component called a lower-twisted yarn, and the filament or fiber component included in the lower-twisted yarn may be selected in consideration of performance required for the use of the tire reinforcement material.
  • aramid fiber has a high modulus, and since the amount of change in modulus at room temperature and high temperature is small, it has an advantage in suppressing the flat spot phenomenon in which the tire is deformed when parked for a long time, so it was mainly used for high-quality tires.
  • aramid fibers are expensive and have poor fatigue resistance due to their high modulus properties. That is, in the case of a tire cord containing aramid lower-twisted yarn, while the reinforcing properties are excellent, fatigue resistance performance or durability is not good.
  • An object of the present application is to provide an eco-friendly cord (cord) including a bio-based nylon fiber and a method for manufacturing the same.
  • Another object of the present application is to provide a cord and a manufacturing method thereof that are not significantly affected by the problem of supply and demand of synthetic raw materials, since they contain bio-derived fibers.
  • Another object of the present application is to provide a cord capable of providing physical properties equivalent to or higher than that of a conventional cord including only chemically synthesized fibers and a method for manufacturing the same.
  • a cord comprising a lower twisted yarn that is a different heterogeneous fiber component, one of the heterogeneous fiber components is bio-derived nylon (or bio-based nylon), and a manufacturing method thereof are provided.
  • the hybrid cord of the present application uses bio-derived nylon, in properties such as strength, medium elongation, elongation at cut, dry heat shrinkage, adhesion, and/or fatigue resistance, physical properties at a commercially required level (that is, conventional chemical The level of physical properties of cords including synthetic nylon lower-twisted yarns) can be provided.
  • bio-nylon fibers when bio-nylon fibers are replaced with chemical synthetic nylon fibers used in the production of hybrid tire cords, bio-nylon fibers have high modulus properties (that is, low and medium elongation) was confirmed.
  • the initial modulus on the stress-strain curve pattern is high, the force received during tension and compression is increased, and the fatigue resistance property is deteriorated.
  • Chemically synthesized nylon fibers have a lower modulus than other materials, so they have an advantageous function in securing the fatigue resistance of cords and tires in a situation where tension and compression are repeated.
  • nylon is substituted, it is disadvantageous for the hybrid cord to secure the fatigue resistance property due to the increase in the modulus of the nylon lower-twisted yarn.
  • the inventor of the present application solves the problem of supply and demand of synthetic materials and the resulting price fluctuation, is eco-friendly, and hybrid cord that can provide physical properties equivalent to or higher than that of the conventional hybrid cord (including chemically synthesized nylon lower-twisted yarn)
  • the invention of the present application was completed.
  • bio-derived nylon or bio-nylon may mean that a component used to manufacture nylon is derived from natural resources, for example, vegetable resources.
  • the bio-based nylon may be or include PA56 or nylon 56.
  • the bio-derived nylon is, for example, 'pentamethylenediamine ( pentamethylenediamine)' may be formed by reacting with dicarboxylic acid.
  • cord may refer to a hybrid cord including at least two different heterogeneous fibers.
  • the cord may refer to a hybrid cord including at least two or more lower twisted yarns including different types of fibers.
  • the hybrid cord may mean that a coating agent such as an adhesive is coated on a fiber component (ply-twisted yarn), that is, a dip cord.
  • a cord including at least two heterogeneous fibers in a state in which the coating agent is not coated on the fiber component may be referred to as a raw cord.
  • the cord or the raw cord has a ply-twisted yarn structure in which at least a first lower twisted yarn and a second twisted yarn are twisted together (that is, the lower twisted yarns are twisted).
  • lower twist means twisting a thread or a filament in one direction
  • lower twisting yarn means a single ply yarn made by twisting a thread or filament in one direction, that is, a single yarn.
  • the lower edge may mean, for example, a clockwise or counterclockwise twist.
  • "plied yarn” may mean a yarn made by twisting two or more lower twisted yarns together in one direction.
  • the upper edge may mean a twist in the opposite direction to the twist in which the lower edge is formed.
  • the sangyeon may mean twisting in a counterclockwise or clockwise direction.
  • the lower-twisted yarn or the ply-twisted yarn produced by applying twist in any direction may have a predetermined number of twists.
  • the number of twists means the number of twists per 1 m, and the unit may be TPM (Twist Per Meter).
  • the present application relates to an eco-friendly cord comprising a bio-based fiber.
  • the bio-derived fiber included in the cord may be referred to as a bio-based nylon fiber or a bio nylon fiber, and is included in the lower twisted yarn constituting the cord.
  • Bio-nylon has different properties from chemically synthesized nylon. For example, as confirmed in an experiment to be described later (see Table 1), bio-nylon has a higher modulus than chemically synthesized nylon. Specifically, referring to Table 1, when chemically synthesized PA66 and bio-nylon PA56 have a fineness in the range of 700 to 1500 denier in common (Table 1, about 845 denier), the intermediate elongation of the bio-nylon yarn is low.
  • the bio-nylon yarn has a median elongation (4.7 constant load elongation of cN/dtex) measured according to ASTM D885 of 15% or less, 14% or less, or 13% or less, 12% or less, 11 % or less, 10% or less, or 9% or less.
  • the lower limit of the intermediate elongation may be 5% or more, 6% or more, 7% or more, 8% or more, 9% or more, or 10% or more.
  • the cord is a hybrid raw cord (hybrid raw cord); and a coating layer formed on the hybrid raw cord.
  • the hybrid raw cord includes: a first lower twisted yarn formed by twisting bio-nylon fibers having a fineness of 600 to 2000 denier; and a second lower twisted yarn formed by applying twist to a heterogeneous resin fiber different from bio-nylon having a fineness of 800 to 2200 denier, wherein the number of twists of the first lower twisted yarn is in the range of 250 to 600 TPM, and the entire hybrid raw cord It includes 20 to 50% by weight of the first lower twisted yarn relative to 100% by weight.
  • the hybrid cord provided according to the present application satisfies a strong retention rate of 90% or more after an 8-hour disk fatigue test conducted according to the JIS-L 1017 method of the Japanese Standard Association (JSA).
  • the cord that reinforces the performance of the tire shows different characteristics (physical properties) according to the thickness. If the thickness of the cord is thick, the performance of the tire is improved in terms of strength and modulus, but the weight increases because the thickness of the rubber covered above and below the fabric becomes thicker and the size of the tire increases. Therefore, it is unsuitable for a tire where fuel efficiency and weight reduction are important. In addition, when the thickness of the cord is thin, it is advantageous for reducing the weight of the tire, but since the strength and modulus are low, the performance as a reinforcing material cannot be sufficiently exhibited. In the present application, in consideration of this point, the fineness of the fibers forming the cord (each fiber forming the lower twisted yarn) is appropriately adjusted.
  • the bio-derived nylon lower-twist yarn may include bio-derived nylon fibers (filaments) having a fineness of 600 to 2000 denier (de).
  • the lower limit of the fineness of the bio-derived nylon fiber is 650 denier or more, 700 denier or more, 750 denier or more, 800 denier or more, 850 denier or more, 900 denier or more, 950 denier or more, 1000 denier or more, 1050 denier or more, 1100 or more. denier or more, 1150 denier or more, 1200 denier or more, 1250 denier or more, 1300 denier or more, 1350 denier or more, or 1400 denier or more.
  • the upper limit is, for example, 1950 denier or less, 1900 denier or less, 1850 denier or less, 1800 denier or less, 1750 denier or less, 1700 denier or less, 1650 denier or less, 1600 denier or less, 1550 denier or less, 1500 denier or less, 1450 denier or less.
  • the second lower twisted yarn may include fibers (filaments) having a fineness of 800 to 2200 denier.
  • the lower fineness limit of the fiber used to form the second lower twisted yarn is 850 denier or more, 900 denier or more, 950 denier or more, 1000 denier or more, 1050 denier or more, 1100 denier or more, 1150 denier or more, 1200 denier or more.
  • the upper limit is, for example, 2150 denier or less, 2100 denier or less, 2050 denier or less, 2000 denier or less, 1950 denier or less, 1900 denier or less, 1850 denier or less, 1800 denier or less, 1750 denier or less, 1700 denier or less, 1650 denier or less. Denier or less, 1600 denier or less, 1550 denier or less, 1500 denier or less, 1450 denier or less, 1400 denier or less, 1350 denier or less, 1300 denier or less, 1250 denier or less, 1200 denier or less, 1150 denier or less, 1100 denier or less, 1050 denier or less , 1000 denier or less, 950 denier or less, or 900 denier or less.
  • the hybrid raw cord includes: a first lower twisted yarn formed by applying twist to a bio-nylon fiber having a fineness of 700 to 1500 denier; and a second lower twisted yarn formed by imparting twist to a heterogeneous resin fiber different from bio-nylon having a fineness of 900 to 1800 denier.
  • the degree of twist between the lower twist yarns and/or the twist between the lower twist yarns affects the physical properties of the cord. Specifically, when the twist number of the lower twisted yarn is too low, the strength may be increased, but the strength retention of the cord is decreased due to the characteristics of the tire in which tension and compression are repeated. That is, the lower the number of twists, the lower the strength retention rate after fatigue. On the other hand, when the twist number of the lower twisted yarn is high, the modulus of the cord is lowered and the elongation is higher, so that the strength retention rate after fatigue due to tension/compression may be increased. However, when the number of twists is too high, the external force applied to the nylon cord by twisting increases, and the strength decreases compared to the low number of twists. In the present application, in consideration of the above points, the number of twists of each lower twisted yarn and the number of twists between the lower twisted yarns may be adjusted.
  • the number of twists (the number of first twists) of the first lower twisted yarn including the bio-nylon may be 250 to 600 TPM. More specifically, the number of twists of the bio-derived nylon lower twist yarn is 260 TPM or more, 270 TPM or more, 280 TPM or more, 290 TPM or more, 300 TPM or more, 310 TPM or more, 320 TPM or more, 330 TPM or more, 340 TPM or more, 350 TPM or higher, 360 TPM or higher, 370 TPM or higher, 380 TPM or higher, 390 TPM or higher, 400 TPM or higher, 410 TPM or higher, 420 TPM or higher, 430 TPM or higher, 440 TPM or higher, 450 TPM or higher, 460 TPM or higher, 470 TPM or higher , 480 TPM or higher, 490 TPM or higher, 500 TPM or higher, 510 TPM or higher, 520 TPM or higher, 530 TPM or higher, 540 TPM or higher,
  • the upper limit of the number of twists is, for example, 590 TPM or less, 580 TPM or less, 570 TPM or less, 560 TPM or less, 550 TPM or less, 540 TPM or less, 530 TPM or less, 520 TPM or less, 510 TPM or less, 500 TPM or less.
  • the number of twists of the second lower twisted yarn may be appropriately adjusted in consideration of the physical properties of the cord generated through the ply twisting of the first lower twisted yarn (formed from bio-derived nylon fibers and having the same number of twists as described above).
  • the number of twists of the second lower twisted yarn may be in the range of 250 to 600 TPM.
  • the number of twists (second twist count) given to the heterogeneous resin fiber different from bio-nylon for forming the second lower twist yarn is 260 TPM or more, 270 TPM or more, 280 TPM or more, 290 TPM or more, 300 TPM or more, 310 TPM or higher, 320 TPM or higher, 330 TPM or higher, 340 TPM or higher, 350 TPM or higher, 360 TPM or higher, 370 TPM or higher, 380 TPM or higher, 390 TPM or higher, 400 TPM or higher, 410 TPM or higher, 420 TPM or higher, 430 TPM or higher , 440 TPM or higher, 450 TPM or higher, 460 TPM or higher, 470 TPM or higher, 480 TPM or higher, 490 TPM or higher, 500 TPM or higher, 510 TPM or higher, 520 TPM or higher, 530 TPM or
  • the upper limit of the number of twists is, for example, 590 TPM or less, 580 TPM or less, 570 TPM or less, 560 TPM or less, 550 TPM or less, 540 TPM or less, 530 TPM or less, 520 TPM or less, 510 TPM or less, 500 TPM or less.
  • the number of twists (first twist number) of the bio-nylon lower twisted yarn and the second twist count (second twist count) of the lower twisted yarn may be the same or different.
  • a CC twisting machine Cable cord twist machine
  • a ring twisting machine Ring-Twister
  • the number settings are the same.
  • a difference in the number of twists may occur within about 15%, within 10%, or within 5% of the set value.
  • the hybrid raw cord may be formed by twisting the first lower twisted yarn and the second lower twisted yarn within a range of 250 to 600 TPM.
  • the number of twists is 260 TPM or more, 270 TPM or more, 280 TPM or more, 290 TPM or more, 300 TPM or more, 310 TPM or higher, 320 TPM or higher, 330 TPM or higher, 340 TPM or higher, 350 TPM or higher, 360 TPM or higher, 370 TPM or higher, 380 TPM or higher, 390 TPM or higher, 400 TPM or higher, 410 TPM or higher, 420 TPM or higher, 430 TPM or higher , 440 TPM or higher, 450 TPM or higher, 460 TPM or higher, 470 TPM or higher, 480 TPM or higher, 490 TPM or higher, 500 TPM or higher, 510 TPM or higher, 520 TPM or higher,
  • the upper limit of the number of twists is, for example, 590 TPM or less, 580 TPM or less, 570 TPM or less, 560 TPM or less, 550 TPM or less, 540 TPM or less, 530 TPM or less, 520 TPM or less, 510 TPM or less, 500 TPM or less.
  • the number of twists of the first and second lower twisted yarns ie, the number of twists at the lower twist
  • the number of twists at the upper twist may be the same or different.
  • the number of twists at the time of the lower twist and the number of twists at the time of the upper twist may be set to be the same.
  • the number of twists at the time of lower twisting and the number of twists at the time of upper twisting may be slightly different in the final product. Specifically, in the case of a CC twisting machine (Cable Cord Twist machine) used in cord manufacturing, it is driven by one motor.
  • CC twisting machine Cable Cord Twist machine
  • the yarn in the creel passes through the disk connected to the motor and is connected to the regulator (the section where the lower and lower yarns meet and form the upper line), and the yarn in the port passes through the tension control guide roll. is connected to the regulator.
  • the regulator to which the yarn from the disk is connected is also rotated.
  • the lower twist is applied to the creel part yarn and the port part yarn connected by the rotation of the motor, and the lower twist yarn is twisted in the regulator to form the upper twist.
  • the raw cord is manufactured while twisting occurs due to the rotational motion of the motor. Even when the same number of twists is given (set) between the lower and upper edges, the number of twists between the upper and lower edges is may be different.
  • the level commercially required with respect to properties such as strength, medium elongation, cut elongation, dry heat shrinkage, adhesion, and/or fatigue resistance may be advantageous in securing the physical properties of (that is, the level of physical properties of a cord including a conventional chemically synthesized nylon lower-twisted yarn).
  • the cord includes a first lower twisted yarn and a second lower twisted yarn having a predetermined number of twists, and is formed by twisting the first lower twisted yarn and the second lower twisted yarn together.
  • the filament for forming the first lower twisted yarn and the filament for forming the second lower twisted yarn are simultaneously lowered by a CC twisting machine (eg, cable corder twist machine) or a ring twisting machine, respectively, while the first lower twisting yarn is twisted. Since the yarn and the second lower twisted yarn are formed, the twist direction (first twist direction) of the first lower twist yarn and the twist direction (second twist direction) of the second lower twist yarn may be the same.
  • the upper twisting when using a CC twisting machine (eg, cable corder twist machine) or a ring twisting machine (ring-twister), the upper twisting may be performed continuously following the lower twisting and simultaneously with the lower twisting, in the twist direction of the upper twist (ie, the third twisting direction) may be opposite to the first twisting direction (or second twisting direction).
  • a CC twisting machine eg, cable corder twist machine
  • ring-twister ring-twister
  • the content of the lower twisted yarn in the cord affects the characteristics of the cord. For example, when the content of aramid is high, the high-speed running performance of the tire can be improved by the high modulus, but the fatigue performance is lowered because it receives a lot of load for the same deformation. In addition, when the content of nylon is high, the modulus of the initial part of the stress-strain curve pattern, which indicates the physical properties of the cord, is low, so that the load for the same deformation is reduced and the fatigue resistance performance is increased. The effect on driving performance is low. In the present application, in consideration of the above points, the content of the lower twisted yarn may be adjusted.
  • the hybrid raw cord may include 20 to 50 wt% of the first lower twisted yarn based on 100 wt% of the total weight of the raw cord.
  • the lower limit of the content of the first lower twisted yarn may be, for example, more than 20 wt%, specifically 25 wt% or more, or 30 wt% or more, and more specifically 31 wt% or more, 32 wt% or more, 33 % or more, 34% or more, 35% or more, 36% or more, 37% or more, 38% or more, 39% or more, 40% or more, 41% or more, 42% or more, 43 weight % or greater, 44 weight % or greater, or 45 weight % or greater.
  • the upper limit is, for example, less than 50% by weight, specifically 49% by weight or less, 48% by weight or less, 47% by weight or less, 46% by weight or less, 45% by weight or less, 44% by weight or less, 43% by weight or less or less, 42 wt% or less, 41 wt% or less, or 40 wt% or less.
  • the content of the remaining lower-twisted yarns (such as second lower-twisted yarns) staged together with the first lower-twisted yarn may be appropriately adjusted at a level that does not impair the above-described objectives of the present application.
  • the content of the second lower-twisted yarn in the raw cord is an amount excluding the above-described first lower-twisted yarn content, that is, 50 to 80 weight. % can be More specifically, the content of the second lower-twisted yarn may be determined according to the above-described content of the first lower-twisted yarn.
  • the content of the lower-twisted yarn in the cord is controlled within the above-mentioned range, the commercially required level of physical properties (that is, the level of physical properties of the cord including the conventional chemically synthesized nylon lower-twisted yarn) is secured, and driving performance and fatigue resistance characteristics are ensured. It is beneficial to ensure a balance between
  • the type of the heterogeneous resin fiber used to form the second lower twisted yarn may be selected at a level that does not impair the purpose of the present application.
  • the second lower twisted yarn may include at least one of polyester fibers, aromatic polyamide fibers, and polyketone fibers.
  • the second lower twisted yarn may include aramid fibers. That is, the second lower twisted yarn may be formed by imparting twist to the aramid fiber, and the hybrid cord of the present application may include a nylon lower twisted yarn (first lower twisted yarn) and an aramid lower twisted yarn (second lower twisted yarn).
  • Aramid which shows high modulus, has a small amount of change in modulus at room temperature and high temperature, so it is excellent in suppressing flat spots, which are deformed when a tire is parked for a long time, and is an advantageous material for providing high-quality tires.
  • the cord may be a two-ply or three-ply cord.
  • the cord may have a two-ply structure in which one first lower twisted yarn having the above-mentioned fineness and one second lower twisted yarn having the above-mentioned fineness are staged together.
  • the cord may have a three-ply structure in which one first lower-twisted yarn having the above-mentioned fineness and two second lower-twisted yarns having the above-mentioned fineness are staged together.
  • the code may be one in which the fineness and/or the number of twists of each of the lower twisted yarns are specified.
  • the first lower twisted yarn is formed by applying twist to a bio-nylon fiber having a fineness of 750 to 1100 denier
  • the second lower twisted yarn is a different type of bio-nylon and a different resin fiber having a fineness of 900 to 1200 denier. It may be formed by giving twist.
  • the number of twists of the first lower twisted yarn may be, for example, 300 TPM or more, and the upper limit thereof may be adjusted within the above-described range. Specific fineness may also be adjusted within the above-described range.
  • the first lower-twisted yarn is formed by giving twist to bio-nylon fibers having a fineness of 1100 to 1500 denier
  • the second lower-twisted yarn is a heterogeneous resin fiber different from bio-nylon having a fineness of 1200 to 1800 denier. It may be formed by imparting twist to the .
  • the number of twists of the first lower twisted yarn may be, for example, 400 TPM or less, and the upper limit thereof may be adjusted within the above-described range. Specific fineness may also be adjusted within the above-described range.
  • the second lower-twisted yarn used together with the bio-nylon lower-twisted yarn that is the first lower-twisted yarn includes aramid fibers
  • the ratio of the length of the second lower twisted yarn to the first lower twisted yarn (the length of the second lower twisted yarn (L 2 )/the length of the first lower twisted yarn (L 1 )) may be in the range of 1.0 to 1.10 times. This is to improve the fatigue performance of the cord by lowering the initial modulus of the cord by making the second lower-twisted yarn (aramid lower-twisted yarn) having a higher modulus longer.
  • the ratio of the length of the second lower twisted yarn to the first lower twisted yarn (the length of the second lower twisted yarn (L2) / the length of the first lower twisted yarn (L1)) is less than 1.0, the aramid with high modulus becomes shorter, indicating the tensile properties of the cord.
  • the modulus of the initial part is increased, which means that the code receives more load in the same deformation, and ultimately, the fatigue resistance performance is lowered.
  • the ratio of the length of the second lower twisted yarn to the first lower twisted yarn exceeds 1.10, the aramid and the nylon are separated by force during the cord tension. may reduce the strength of the final code.
  • the lower limit of the ratio may be, for example, 1.01 or more, 1.02 or more, 1.03 or more, 1.04 or more, or 1.05 or more, and the upper limit thereof is, for example, 1.09 or less, 1.08 or less, 1.07 or less, 1.06 or less, or 1.05 or less.
  • the length ratio control as described above is the amount of tension applied to each of the filaments forming the first lower twisted yarn and the filaments forming the second lower twisted yarn during the lower twisting and/or upper twisting process for manufacturing the cord. This can be done through control. More specifically, by making the magnitude of the tension applied to the aramid fiber (forming the second lower twisted yarn) smaller than the tension applied to the bionylon fiber forming the first lower twisted yarn, when the lower twist and upper twist are made, the second The length of the lower twisted yarn may be made longer than the length of the first lower twisted yarn.
  • the coating layer formed on the raw code means a layer formed from a coating solution capable of exhibiting a predetermined function. Such a coating layer may be formed on at least a portion of the aforementioned lower twisted yarn.
  • the method of forming the coating layer is not particularly limited, and for example, the coating layer may be formed through a known dipping or spraying method.
  • the coating layer may be configured to impart predetermined characteristics to the cord or to reinforce the characteristics of the cord.
  • the coating layer may be a layer capable of imparting an adhesive function to the cord, but the properties imparted or reinforced by the coating layer are not limited only to the adhesive function.
  • the coating layer may be formed from an adhesive (composition).
  • the coating layer may include or be formed from a resorcinol-formaldehyde-latex (RFL) adhesive (composition), an epoxy adhesive (composition), or a urethane adhesive (composition).
  • RTL resorcinol-formaldehyde-latex
  • composition an epoxy adhesive
  • urethane adhesive composition
  • the adhesive component forming the coating layer is not limited to those described above.
  • the adhesive composition may include an aqueous or non-aqueous solvent. These adhesives allow the fiber cord to exhibit improved adhesion to other adjacent constructions in tire reinforcement applications.
  • the hybrid cord having the above configuration may provide commercially required level of physical properties (ie, the level of physical properties of a cord including a conventional chemically synthesized nylon lower-twisted yarn).
  • Such physical properties include, for example, strength, medium elongation, elongation at cut, dry heat shrinkage, adhesion, and fatigue resistance.
  • the hybrid cord of the present application is constructed and manufactured to supplement the high modulus properties of the bio-nylon lower-twisted yarn, it is possible to prevent deterioration of the expected elongation and fatigue resistance of the cord according to the use of the bio-nylon lower-twisted yarn having a high modulus. can
  • the strength of the hybrid cord may be greater than or equal to 20 kgf. Specifically, the strength may be, for example, 21 kgf or more, 22 kgf or more, 23 kgf or more, 24 kgf or more, or 25 kgf or more.
  • the strength is similar to that of a cord including a conventional chemically synthesized nylon lower-twist yarn. The strength may be measured according to a method to be described later.
  • the median elongation (%, @4.5 kg) of the hybrid cord may be 2.8% or more.
  • the median elongation is 2.9% or more, 3.0% or more, 3.1% or more, 3.2% or more, 3.3% or more, 3.4% or more, 3.5% or more, 3.6% or more, 3.7% or more, 3.8% or more, 3.9% or more. or more, 4.0% or more, 4.1% or more, 4.2% or more, 4.3% or more, 4.4% or more, 4.5% or more, 4.6% or more, 4.7% or more, 4.8% or more, 4.9% or more, or 5.0% or more.
  • the corresponding intermediate elongation is equivalent to or higher than the intermediate elongation of a cord including a conventional chemically synthesized nylon lower-twisted yarn.
  • the median elongation may be measured according to a method to be described later.
  • the intermediate elongation can be adjusted or changed according to the number of twists. For example, when the number of twists in the cord is low, the modulus is high during the tensile test, and accordingly, the median elongation is lowered. When the number of twists is low, the modulus is higher due to the structural characteristics of the cord. The lower the number of twists in the cord length direction, the more oblique lines caused by the twist are erected in the cord length direction and the maximum force is received earlier, so the overall modulus is lowered. because it rises
  • the cut elongation (%) of the hybrid cord may be 7.0% or more.
  • the elongation at cut is 7.1% or more, 7.2% or more, 7.3% or more, 7.4% or more, 7.5% or more, 7.6% or more, 7.7% or more, 7.8% or more, 7.9% or more, 8.0% or more, 8.1% or more. or more, 8.2% or more, 8.3% or more, 8.4% or more, 8.5% or more, 8.6% or more, 8.7% or more, 8.8% or more, 8.9% or more, 9.0% or more, 9.1% or more, 9.2% or more, 9.3% or more, 9.4% or more, 9.5% or more, 9.6% or more, 9.7% or more, 9.8% or more, 9.9% or more, or 10% or more.
  • the cut elongation is equivalent to or higher than the intermediate elongation of a cord including a conventional chemically synthesized nylon lower-twisted yarn. The cut elongation may be measured according to a method to be described later.
  • the breaking elongation may be adjusted or changed according to the number of twists. For example, the higher the twist, the lower the modulus, the more inclined the S-S curve pattern (stress-strain curve pattern), and as a result, the cutting elongation may be increased.
  • the dry heat shrinkage rate of the hybrid cord may be 1.2% or more.
  • the dry heat shrinkage rate may be 1.3% or more, 1.4% or more, 1.5% or more, 1.6% or more, 1.7% or more, 1.8% or more, 1.9% or more, or 2.0% or more.
  • the dry heat shrinkage rate is similar to the dry heat shrinkage rate of a cord including a conventional chemically synthesized nylon lower-twisted yarn.
  • the dry heat shrinkage rate may be measured according to a method to be described later.
  • the adhesive force of the hybrid cord may be 12.5 kgf or more.
  • the adhesive strength is 12.6 kgf or more, 12.7 kgf or more, 12.8 kgf or more, 12.9 kgf or more, 13.0 kgf or more, 13.1 kgf or more, 13.2 kgf or more, 13.3 kgf or more, 13.4 kgf or more, 13.5 kgf or more, 13.6 kgf or more. , 13.7 kgf or more, 13.8 kgf or more, 13.9 kgf or more, or 14.0 kgf or more.
  • the adhesive strength is at a similar level compared to the adhesive strength of a cord including a conventional chemically synthesized nylon lower-twisted yarn.
  • the adhesive force may be measured according to a method to be described later.
  • the strength retention rate after 8 hours fatigue of the hybrid cord may be 90% or more.
  • the strength retention rate after 8 hours fatigue may be 90.5% or more, 91.0% or more, 91.5% or more, 92.0% or more, 92.5% or more, or 93.0% or more.
  • the strength retention after 8 hours fatigue as described above is equivalent to or higher than the strength retention ratio after 8 hours fatigue of a cord including a conventional chemically synthesized nylon lower-twisted yarn.
  • the strength retention rate after 8 hours fatigue may be measured according to a method to be described later.
  • the strength retention rate after 16 hours fatigue of the hybrid cord may be 70% or more.
  • the strength retention rate after 16 hours fatigue is 70.5% or more, 71.0% or more, 71.5% or more, 72.0% or more, 72.5% or more, 73.0% or more, 73.5% or more, 74.0% or more, 74.5% or more, 75.0% or more. or more, 75.5% or more, 76.0% or more, 76.5% or more, 77.0% or more, 77.5% or more, 78.0% or more, 78.5% or more, 79.0% or more, 79.5% or more, or 80.0% or more.
  • the strength retention after 16 hours of fatigue as described above is equivalent to or greater than the retention of strength after 16 hours of fatigue of a cord including a conventional chemically synthesized nylon lower-twisted yarn.
  • the strength retention rate after 16 hours of fatigue may be measured according to a method to be described later.
  • the characteristics of the hybrid cord may be different depending on the configuration of the cord.
  • the first lower twisted yarn is formed by giving a twist to a bio-nylon fiber having a fineness of 750 to 1100 denier, and the second lower twisted yarn has a fineness of 900 to 1200 denier. It is formed by imparting twist to a different type of resin fiber different from bio nylon having In this case, the median elongation of the cord is, for example, 3.8% or more, 3.9% or more, 4.0% or more, 4.1% or more, 4.2% or more, 4.3% or more, 4.4% or more, 4.5% or more, 4.6% or more, 4.7% or more. or more, 4.8% or more, 4.9% or more, or 5.0% or more.
  • the cut elongation of the cord is, for example, 8.5% or more, 8.6% or more, 8.7% or more, 8.8% or more, 8.9% or more, 9.0% or more, 9.1% or more, 9.2% or more, 9.3% or more, 9.4% or more. , 9.5% or more, 9.6% or more, 9.7% or more, 9.8% or more, 9.9% or more, or 10% or more.
  • the strength retention after 8 hours fatigue may be 91.0% or more, 91.5% or more, 92.0% or more, 92.5% or more, or 93.0% or more, and the strength retention rate after 16 hours fatigue is 75.0% or more, 75.5 % or more, 76.0% or more, 76.5% or more, 77.0% or more, 77.5% or more, 78.0% or more, 78.5% or more, 79.0% or more, 79.5% or more, or 80.0% or more.
  • the first lower twisted yarn is formed by giving a twist to a bio nylon fiber having a fineness of 750 to 1100 denier
  • the second lower twisted yarn is a bio nylon having a fineness of 900 to 1200 denier. It is formed by imparting twist to a different type of resin fiber, and a ply-twisted yarn having a twist number of the first lower twisted yarn, for example, 300 or more and less than 350 TPM may be used.
  • the median elongation of the cord is, for example, 2.8% or more, 2.9% or more, 3.0% or more, 3.1% or more, 3.2% or more, 3.3% or more, 3.4% or more, 3.5% or more, 3.6% or more, 3.7% or more. or more, 3.8% or more, 3.9% or more, or 4.0% or more.
  • the cut elongation of the cord is, for example, 7.0% or more, 7.1% or more, 7.2% or more, 7.3% or more, 7.4% or more, 7.5% or more, 7.6% or more, 7.7% or more, 7.8% or more, 7.9% or more.
  • the strength retention after 8 hours fatigue may be 90% or more, 90.5% or more, or 91.0% or more, and the strength retention after 16 hours fatigue is 70% or more, 70.5% or more, 71.0% or more, 71.5% or more, 72.0% or more, 72.5% or more, 73.0% or more, 73.5% or more, 74.0% or more, 74.5% or more, or 75.0% or more.
  • the present application relates to a method of manufacturing an eco-friendly cord including a bio-based fiber.
  • the method may be a method of manufacturing the above-described code.
  • heat setting may be performed so that molecular chains are well oriented in the fiber length direction in order to express strength and modulus properties suitable for the use.
  • the heat-setting fiber when it is subjected to a temperature higher than the glass transition temperature, it returns to its original curly shape. In this case, the modulus is lowered.
  • the molecular chain when a low tension is applied during heat treatment for producing a dip cord, the molecular chain returns to its original shape and the modulus is lowered, and when a high tension is applied, the molecular chain is maintained in an oriented state or The more oriented, the higher the modulus.
  • the inventor of the present application controls the tension applied to the ply-twisted yarn having the above-described configuration in a predetermined range when forming the coating layer in consideration of the above-described thermal characteristics of the fiber and the dip code manufacturing process.
  • the method includes a first lower twisted yarn formed by applying twist to a bio-nylon fiber having a fineness of 600 to 2000 denier, and a first formed by applying twist to a heterogeneous resin fiber different from nylon having a fineness of 800 to 2200 denier. 2 preparing a ply-twisted yarn staged together with a lower twisted yarn; and forming a coating layer on the ply-twisted yarn while applying tension to the ply-twisted yarn. At this time, the tension applied to the ply-twisted yarn is 1.0 kg/cord or less .
  • the number of twists applied to the first lower twisted yarn is in the range of 250 to 600 TPM, and the hybrid raw cord includes 20 to 50 wt% of the first lower twisted yarn based on 100 wt% of the total weight.
  • the hybrid cord manufactured according to the above method satisfies a strong retention rate of 90% or more after an 8-hour disk fatigue test conducted according to the JIS-L 1017 method of the Japanese Standard Association (JSA).
  • the tension applied to the ply-twisted yarn is 0.1 kg/cord or more, 0.2 kg/cord or more, 0.3 kg/cord or more, 0.4 kg/cord or more, 0.5 kg/cord or more, 0.6 kg/cord or more, 0.7 kg/cord or more, 0.8 kg/cord or more, or 0.9 kg/cord or more.
  • the upper limit is, for example, less than 0.9 kg / cord, less than 0.8 kg / cord, less than 0.7 kg / cord, less than 0.6 kg / cord, less than 0.5 kg / cord, less than 0.4 kg / cord, less than 0.3 kg / cord or 0.2 kg/cord or less.
  • the method includes forming a coating layer on the ply-twisted yarn while applying tension to the ply-twisted yarn (low cord) including the bio-derived nylon lower-twisted yarn.
  • 'coating layer formation' may mean that the coating composition (coating solution) is applied on the raw code.
  • the applied coating composition may be subjected to heat treatment such as drying or curing, which will be described later.
  • the coating layer may mean a layer obtained through heat treatment.
  • a method of applying the coating composition (coating solution) on the rocode is not particularly limited, and, for example, immersion or spraying may be used.
  • the method may include spraying a coating layer forming composition (coating solution) on the ply-twisted yarn (low code). That is, in the method, the coating layer may be formed by spraying the coating layer forming composition (coating solution) on the ply-twisted yarn.
  • the method may include immersing the ply-twisted yarn (low code) in the coating layer forming composition (coating solution). That is, in the method, the coating layer may be formed by immersing the ply-twisted yarn in the coating layer forming composition (coating solution).
  • a specific method of dipping the ply-twisted yarn into the coating composition is not particularly limited.
  • a method of immersing the ply-twisted yarn in a coating bath filled with the coating composition while transferring the ply-twisted yarn or a fiber base including the same using a roll may be used.
  • the cord coated with the coating composition after immersion may be referred to as a dip cord.
  • the coating layer may be formed while passing through the process of transferring the cord, applying a coating composition to the cord (spraying or immersing), and/or a subsequent heat treatment process.
  • the coating layer forming step (process) made while applying tension may include one or more processes of transferring the cord, immersion (or spraying), and heat treatment.
  • the coating layer forming step (process) made while applying a tension, heat treatment while applying a tension of the above-described size to the ply-twisted yarn to which the coating composition is already applied; Applying the coating composition to the ply-twisted yarn and performing heat treatment while applying the tension of the size described above; Alternatively, it may include transferring the ply-twisted yarn, applying the coating composition, and performing heat treatment while applying the above-mentioned magnitude of tension.
  • the heat treatment may be performed at a temperature within a predetermined range.
  • the heat treatment may be performed at a temperature of 50 °C or higher, specifically, at a temperature in the range of 60 to 350 °C.
  • the heat treatment may be performed for 10 to 300 seconds.
  • the method may include two or more heat treatment steps. Specifically, the method includes a first heat treatment step made at a temperature of 60 to 220 °C; And it may include a second heat treatment step made at a temperature of 200 to 350 °C.
  • the time period during which the heat treatment is performed is not particularly limited, but, for example, each of these heat treatments may be performed for about 10 to 300 seconds.
  • the temperature at which the first heat treatment is performed may be lower than the temperature at which the second heat treatment is performed.
  • the first heat treatment temperature may be in the range of 70 to 180 °C
  • the second heat treatment temperature may be in the range of 200 to 300 °C.
  • the first heat treatment performed at a relatively low temperature may be referred to as a drying process
  • the second heat treatment performed at a relatively high temperature may be referred to as a curing process.
  • the coating layer forming step (process) performed while applying the tension may be used in the sense of including heat treatment while applying a tension of the above-described size to the ply-twisted yarn to which the coating composition has been applied. More specifically, the coating layer forming step (process) performed while applying the tension includes performing a second heat treatment while applying a tension of the above-described size to the ply-twisted yarn performed up to the first heat treatment after the coating composition is applied can be used for meaning. Since high temperature heat treatment, particularly the second heat treatment, greatly affects the final physical properties of the cord, it is important to satisfy the above-described tension range.
  • the tension in the above-mentioned range can be maintained at least during the heat treatment, more specifically, the second heat treatment, and in addition to the transfer and immersion (spray) for forming the coating layer, and the first heat treatment process, the same or different (slightly different) can be changed.
  • the immersion or spraying may be performed one or more times.
  • the components of the coating composition used for each immersion or spraying may be the same or different.
  • the first immersion, the second immersion, and the heat treatment may be sequentially performed.
  • the heat treatment may sequentially include a first heat treatment (eg, drying) and/or a second heat treatment (eg, curing).
  • first immersion, heat treatment, second immersion and heat treatment may be sequentially performed.
  • the heat treatment performed between the first immersion and the second immersion may be a drying process made at a relatively low temperature
  • the heat treatment performed after the second immersion may be a hardening process made at a relatively high temperature.
  • a bio-derived nylon fiber (filament) is lower-twisted in a first twist direction to produce a first lower twisted yarn, and at the same time, a second lower twisted yarn is lowered by lowering a heterogeneous fiber (filament) in a second twist direction.
  • a bio-derived nylon fiber (filament) is lower-twisted in a first twist direction to produce a first lower twisted yarn, and at the same time, a second lower twisted yarn is lowered by lowering a heterogeneous fiber (filament) in a second twist direction.
  • the method may be a method of manufacturing a ply-twisted yarn by twisting the first and second lower-twisted yarns in a third twist direction after or simultaneously with the production of the lower-twisted yarn as described above.
  • the first twisting direction and the second twisting direction may be the same, and the first twisting direction and the third twisting direction may be different from each other.
  • a twisting machine that simultaneously performs lower twisting and upper twisting such as a cable coder, may be used to manufacture a ply-twisted yarn.
  • the first lower twisted yarn forming filament bio-derived nylon filament yarn
  • the second lower twisted yarn forming filament e.g., aramid, etc.
  • one twisting machine e.g., cable corder
  • the twisting direction (first twisting direction) of the first lower twisted yarn and the second twisting direction (second twisting direction) of the lower twisted yarn may be the same.
  • the lowering and lowering twisting may be performed continuously and simultaneously, such a stage
  • the twist direction ie, the third twist direction
  • the twist direction may be opposite to the first twist direction (or the second twist direction).
  • the method may be a method of forming the second lower twisted yarn by imparting a twist number within the range of 250 to 600 TPM to the fibers (filaments) forming the second lower twisted yarn. That is, the number of twists imparted to the second lower twisted yarn is in the range of 250 to 600 TPM.
  • the method may form a ply-twisted yarn by twisting the first lower-twisted yarn and the second lower-twisted yarn with a twist number within a range of 250 to 600 TPM.
  • the method provides twist to a bio-nylon fiber having a fineness of 750 to 1100 denier to form the first lower twisted yarn, and twisting to a heterogeneous resin fiber different from the bio-nylon having a fineness of 900 to 1200 denier. to form the second lower twisted yarn.
  • the number of twists applied to the first lower twisted yarn may be 300 TPM or more, and the upper limit thereof may be adjusted within the above-described range. Specific fineness can also be adjusted within the above-mentioned range.
  • the method imparts twist to a bio-nylon fiber having a fineness of 1100 to 1500 denier to form the first lower twisted yarn, and twisting to a heterogeneous resin fiber different from the bio-nylon having a fineness of 1200 to 1800 denier to form the second lower twisted yarn.
  • the number of twists of the first lower twisted yarn may be, for example, 400 TPM or less, and the upper limit thereof may be adjusted within the above-described range. Specific fineness may also be adjusted within the above-described range.
  • the second lower twisted yarn used together with the first lower twisted bio-nylon lower twisted yarn may include aramid fibers.
  • the method determines the magnitude of the tension applied to the aramid fiber (forming the second lower twisted yarn) when the lower twisting and/or upper twisting is made, rather than the tension applied to the bionylon fiber (forming the first lower twisted yarn). It may be a way to control smaller.
  • the ratio of the length of the second lower-twisted yarn to the first lower-twisted yarn (length of the second lower-twisted yarn (L 2 )/length of the first lower-twisted yarn) measured after untwisting the upper yarn with respect to the ply-twisted yarn (low code or deep code). (L 1 )) can be adjusted in this 1.0 to 1.10 times range.
  • the ply-twisted yarn (low code) formed including the bio-derived nylon lower-twisted yarn has poor physical property balance due to the characteristics of the bio-derived nylon yarn with a low intermediate elongation (ie, high modulus) (for example, , poor strength properties after fatigue).
  • the method of the present application for controlling the properties of the fibers eg, the type of fibers, the number of twists, the fineness, the content, etc.
  • the tension at the time of forming the coating layer within a predetermined range is a bio-derived nylon lower-twisted yarn with high modulus. While using, it is possible to provide the same or higher level of elongation characteristics and strength retention after fatigue compared to conventional cords including chemically synthesized nylon lower-twisted yarns.
  • the present application relates to a rubber composite or rubber reinforcement including the cord.
  • the rubber composite or rubber reinforcing material may further include a rubber substrate such as a rubber sheet in addition to the above-described code.
  • the present application relates to a tire including the cord.
  • the tire may have a generally known configuration such as a tread, shoulder, sidewall, cap ply, belt, carcass (or body ply), inner liner, bead, and the like.
  • a hybrid cord that includes a bio-derived nylon lower-twist yarn and meets the commercially required level of physical properties in relation to strength, medium elongation, cut elongation, dry heat shrinkage, adhesion, and/or fatigue resistance, etc.
  • the present application includes a bio-derived nylon lower-twisted yarn having a higher modulus compared to chemically synthesized nylon, while elongation and fatigue resistance properties are commercially required (that is, a cord including a conventional chemically synthesized nylon lower-twisted yarn has level) has the effect of the invention to provide a hybrid code that is equal to or greater than the level.
  • the comparative evaluation of the physical properties of Chemicla Nylon and Bio-based Nylon yarn measured according to ASTM D885 is as follows.
  • An Instron tester Instron Engineering Corp., Canton, Mass
  • a Testrite was used to measure the hot air shrinkage
  • an oven and Instron were used to measure the heat resistance strength retention rate.
  • a tester was used.
  • Bio-based Nylon has a lower intermediate elongation (ie, higher modulus) and a lower elongation at break (elongation at break) than Chemical Nylon, assuming that it has a similar fineness. It is confirmed that the dry heat shrinkage rate of Bio-based Nylon is generally higher than that of Chemical Nylon due to the characteristics of other yarns.
  • TPM twist per meter
  • the length ratio of aramid single yarn and Bio-Based Nylon single yarn apply a 0.05 g/d load to a 1 m long ply-twisted yarn (low code) sample and untwist the upper strand to separate the aramid single yarn and Bio-Based Nylon single yarn from each other.
  • the length of the aramid single yarn and the length of the Bio-Based Nylon single yarn were measured under a load of 0.05 g/d, respectively.
  • the raw cord prepared as described above contains about 45.7 wt% of the first lower-twisted yarn (including bio-nylon fibers) and about 54.3 wt% of the second lower-twisted yarn (including aramid fibers).
  • the ply-twisted yarn (low code) was prepared with 2.0 wt% resorcinol, 3.2 wt% formalin (37%), 1.1 wt% sodium hydroxide (10%), 43.9 wt% styrene/butadiene/vinylpyridine ( 15/70/15) was dipped in a resorcinol-formaldehyde-latex (RFL) adhesive solution containing rubber (41%) and water.
  • RFL resorcinol-formaldehyde-latex
  • a hybrid tire cord was completed by drying the ply-twisted yarn (raw cord) containing the RFL solution by immersion at 150° C. for 100 seconds and heat treatment (curing) at 240° C. for 100 seconds.
  • the tension applied to the ply-twisted yarn during the immersion, drying, and heat treatment processes was 0.6 kg/cord.
  • a hybrid cord was prepared in the same manner as in Example 1, except that the tension applied to the ply-twisted yarn during coating was 0.3 kg/cord.
  • a hybrid cord was prepared in the same manner as in Example 1, except that 840 denier Chemical Nylon (PA 66) was used instead of 840 denier Bio-Based Nylon, and the tension applied to the ply-twisted yarn during coating was 0.8 kg. did.
  • PA 66 840 denier Chemical Nylon
  • a hybrid cord was prepared in the same manner as in Example 1, except that the tension applied to the ply-twisted yarn during coating was 1.5 kg/cord.
  • a hybrid cord was prepared in the same manner as in Example 1, except that the tension applied to the ply-twisted yarn during coating was 1.1 kg/cord.
  • Dry heat shrinkage (%) According to the dry heat shrinkage measurement method stipulated in ASTM D885, the shrinkage was measured after standing at a temperature of 177° C. for 2 minutes using a Testright instrument.
  • Adhesion (kgf) The adhesion of the hybrid cord to the rubber was measured using the H-Test method specified in ASTM D885. This is a measure of the force applied when a single cord is pulled out of the rubber.
  • Fatigue resistance (Fatigue 8H, ⁇ 5% (%)): After preparing a sample by vulcanizing a hybrid tire cord with measured strength (strength before fatigue) to rubber, Fatigue was applied to the sample by repeating tension and contraction within ⁇ 5% for 8 hours while rotating at a speed of 2500 rpm at 80° C. using a Disk Fatigue Tester according to the JIS-L 1017 method. . Then, after removing the rubber from the sample, the strength after fatigue of the hybrid tire cord was measured. The strength retention rate defined by Equation 1 below was calculated based on the strength before fatigue and strength after fatigue.
  • the strength (kgf) before and after fatigue is, according to ASTM D-885 test method, 300 m/min tensile speed for a sample of 250 mm using an Instron tester (Instron Engineering Corp., Canton, Mass). It was obtained by measuring the strength at break of the hybrid tire cord while applying .
  • Fatigue resistance properties (Fatigue 16H, ⁇ 5% (%)) : Measurements were made in the same manner as the aforementioned fatigue resistance properties (Fatigue 8H, ⁇ 5% (%)), except that tension and contraction were performed for 16 hours.
  • Example 1 Example 2 Reference Example 1 Comparative Example 1 Comparative Example 2 Types of Nylon Bottom Twist Yarns PA 56 PA 56 PA 66 PA 56 PA 56 Twists (TPM)* 360 360 360 360 360 360 360 360 360 Tension at coating (kgf/cord)** 0.6 0.3 0.8 1.5 1.1 Strong (kgf) 25.1 25.2 25.3 25.3 25.4 Medium elongation@4.5kgf(%) 4.0 4.5 4.1 3.0 3.5 Elongation at cut (%) 9.3 9.9 9.6 7.5 8.2 Dry heat shrinkage (%) 1.6 1.4 1.6 2.1 1.8 Adhesion (kgf) 13.3 13.8 13.7 13.7 13.0 Fatigue 8H, ⁇ 5% (%) 91.5 92.8 92.7 82.3 84.7 Fatigue 16H, ⁇ 5% (%) 76.8 80.1 77.2 68.4 70.3 *Number of twists: When manufacturing the cords of Examples and Comparative Examples, the number of twists set for each lower twisted yarn and the set number of twists when twisting the lower twisted yarn
  • the code of the comparative example had a low intermediate elongation (high initial modulus on the s-s curve pattern) and deteriorated fatigue resistance.
  • the code of the example shows characteristics equal to or higher than that of Reference Example 1 using PA66.
  • a hybrid cord was manufactured in the same manner as in Example 1, except that the number of twists was set to 335 TPM during the manufacture of the ply-twisted yarn, and the tension applied to the ply-twisted yarn during coating was set to 1.0 kg/cord.
  • a hybrid cord was prepared in the same manner as in Example 3, except that the tension applied to the ply-twisted yarn during coating was 0.8 kg/cord.
  • a hybrid cord was prepared in the same manner as in Example 3, except that 840 denier Chemical Nylon (PA 66) was used instead of 840 denier Bio-Based Nylon, and the tension applied to the ply-twisted yarn during coating was 1.2 kg. did.
  • PA 66 840 denier Chemical Nylon
  • a hybrid cord was prepared in the same manner as in Example 3, except that the tension applied to the ply-twisted yarn during coating was 2.0 kg/cord.
  • a hybrid cord was prepared in the same manner as in Example 3, except that the tension applied to the ply-twisted yarn during coating was 1.5 kg/cord.
  • Example 3 Example 4 Reference Example 1 Comparative Example 1 Comparative Example 2 Types of Nylon Bottom Twist Yarns PA 56 PA 56 PA 66 PA 56 PA 56 Twists (TPM)* 335 335 335 335 335 335 335
  • TPM Twists
  • Tension at coating (kgf/cord)** 1.0 0.8 1.2 2.0 1.5 Strong (kgf) 25.4 24.8 25.6 25.1 25.5 Medium elongation@4.5kgf(%) 3.1 3.3 3.1 2.3 2.6 Elongation at cut (%) 7.5 7.7 7.7 6.3 6.9 Dry heat shrinkage (%) 1.8 1.6 1.8 2.4 2.0
  • the code of the comparative example had a low intermediate elongation (high initial modulus on the s-s curve pattern) and deteriorated fatigue resistance.
  • the code of the example shows characteristics equal to or higher than that of Reference Example 1 using PA66.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Ropes Or Cables (AREA)
  • Organic Insulating Materials (AREA)

Abstract

La présente demande concerne un cordon hybride comprenant un fil retors simple principalement constitué de nylon à base biologique. La présente demande concerne un cordon hybride qui comprend un fil retors simple principalement constitué de nylon à base biologique présentant un module plus élevé que le nylon synthétisé chimiquement, ainsi que des propriétés de résistance à l'allongement et à la fatigue équivalentes ou supérieures à une norme requise dans le commerce (c'est-à-dire la norme d'un cordon comprenant un fil retors simple traditionnel principalement constitué de nylon synthétisé chimiquement).
PCT/KR2022/005981 2021-04-26 2022-04-27 Cordon comprenant un composant à base biologique et son procédé de préparation WO2022231286A1 (fr)

Priority Applications (4)

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US18/262,551 US20240076810A1 (en) 2021-04-26 2022-04-27 Cord including bio-based component and method for preparing the same
JP2023559720A JP2024511515A (ja) 2021-04-30 2022-04-27 バイオ由来成分を含むコードおよびその製造方法
CN202280022952.6A CN117043402A (zh) 2021-04-30 2022-04-27 包含生物基组分的帘线及其制备方法
EP22796119.0A EP4276229A1 (fr) 2021-04-30 2022-04-27 Cordon comprenant un composant à base biologique et son procédé de préparation

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KR10-2021-0056810 2021-04-30
KR20210056810 2021-04-30
KR1020220051246A KR20220149436A (ko) 2021-04-30 2022-04-26 바이오 유래 성분을 포함하는 코드 및 그 제조방법
KR10-2022-0051246 2022-04-26

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WO2023140819A1 (fr) * 2022-01-19 2023-07-27 Kordsa Teknik Tekstil A.S. Cordons de renfort à base de polyamide 5.6 pour articles élastomères

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KR20200128791A (ko) * 2019-05-07 2020-11-17 건국대학교 산학협력단 폴리아마이드 수지, 이의 제조방법, 및 이를 포함하는 정전기 방지용 섬유
CN112342655A (zh) * 2020-10-10 2021-02-09 图木舒克市东湖兴纺织有限公司 一种生物基锦纶纱线及制备工艺

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JP2011195964A (ja) * 2010-03-17 2011-10-06 Toray Ind Inc 高強度ナイロン５６短繊維およびその製造方法
KR101602605B1 (ko) * 2015-06-29 2016-03-21 코오롱인더스트리 주식회사 하이브리드 타이어 코드 및 그 제조방법
KR20200080602A (ko) * 2018-12-27 2020-07-07 코오롱인더스트리 주식회사 고무에 대한 강한 접착력 및 우수한 내피로 특성을 갖는 하이브리드 타이어 코드 및 그 제조방법
KR20200128791A (ko) * 2019-05-07 2020-11-17 건국대학교 산학협력단 폴리아마이드 수지, 이의 제조방법, 및 이를 포함하는 정전기 방지용 섬유
CN112342655A (zh) * 2020-10-10 2021-02-09 图木舒克市东湖兴纺织有限公司 一种生物基锦纶纱线及制备工艺

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* Cited by examiner, † Cited by third party
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WO2023140819A1 (fr) * 2022-01-19 2023-07-27 Kordsa Teknik Tekstil A.S. Cordons de renfort à base de polyamide 5.6 pour articles élastomères

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US20240076810A1 (en) 2024-03-07
JP2024511515A (ja) 2024-03-13
TW202246606A (zh) 2022-12-01
TWI804297B (zh) 2023-06-01

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