WO2004090224A1 - ゴムを補強するための補強用コードおよびそれを用いたゴム製品 - Google Patents
ゴムを補強するための補強用コードおよびそれを用いたゴム製品 Download PDFInfo
- Publication number
- WO2004090224A1 WO2004090224A1 PCT/JP2004/005037 JP2004005037W WO2004090224A1 WO 2004090224 A1 WO2004090224 A1 WO 2004090224A1 JP 2004005037 W JP2004005037 W JP 2004005037W WO 2004090224 A1 WO2004090224 A1 WO 2004090224A1
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- WO
- WIPO (PCT)
- Prior art keywords
- rubber
- fiber strand
- cord
- reinforcing
- carbon fiber
- Prior art date
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Classifications
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G1/00—Driving-belts
- F16G1/28—Driving-belts with a contact surface of special shape, e.g. toothed
-
- 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
- D02G3/16—Yarns or threads made from mineral substances
- D02G3/18—Yarns or threads made from mineral substances from glass or the like
- D02G3/182—Yarns or threads made from mineral substances from glass or the like the glass being present only in part of the structure
- D02G3/187—Yarns or threads made from mineral substances from glass or the like the glass being present only in part of the structure in the sheath
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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
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- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2936—Wound or wrapped core or coating [i.e., spiral or helical]
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2964—Artificial fiber or filament
Definitions
- the present invention relates to a reinforcing cord for reinforcing rubber and a rubber product using the same.
- reinforcing fibers such as glass fibers and aramide fibers have been used.
- these rubber products are repeatedly subjected to bending stress, their performance is likely to deteriorate due to bending fatigue.
- peeling occurs between the reinforcing fiber and the rubber matrix, or the reinforcing fiber wears, resulting in a reduction in strength due to abrasion of the reinforcing fiber. Therefore, reinforcing fibers used in these rubber products are required to have high bending fatigue resistance.
- evening belts used for driving camshafts of automobile internal combustion engines require high dimensional stability to maintain appropriate timing.
- rubber belts used for auxiliary drive of injection pumps and power transmission of industrial machines are required to have high strength and high elasticity.
- reinforcing cords containing specific reinforcing fibers have been used.
- reinforcing fibers for example, high-strength glass fibers and polyparaphenylene terephthalamide fibers (aramid fibers) have been used.
- carbon fibers and fibers made of polyparaphenylenebenzenezoxazole have also been used.
- JP-A-8- Japanese Patent Publication No. 174 708 proposes a carbon fiber as a tensile member for a toothed belt.
- Cords for reinforcing rubber are required to have various properties such as high strength, high elasticity, and flexibility in bending and abrasion resistance.
- a reinforcing cord using carbon fiber as a reinforcing fiber has a problem that it has high strength and high elasticity, but has low bending resistance, and the strength tends to decrease due to bending. Disclosure of the invention
- a reinforcing cord of the present invention is a reinforcing cord for reinforcing rubber, comprising a carbon fiber strand and a plurality of glass fiber strands arranged around the carbon fiber strand. Including land.
- the rubber product of the present invention includes a rubber part and a reinforcing cord embedded in the rubber part, and the reinforcing cord is the reinforcing cord of the present invention.
- FIG. 1 is a cross-sectional view schematically showing one example of the reinforcing cord of the present invention.
- FIG. 2 is a diagram schematically illustrating an example of the structure of the reinforcing cord of the present invention.
- FIG. 3 is an exploded perspective view illustrating an example of the rubber product of the present invention.
- FIG. 4 is a diagram schematically illustrating a bending test method. BEST MODE FOR CARRYING OUT THE INVENTION
- the reinforcing cord of the present invention includes a carbon fiber strand and a plurality of glass fiber strands arranged around the carbon fiber strand.
- the carbon fiber strand is typically composed of only carbon fibers, but may contain other fibers as long as the effects of the present invention can be obtained.
- the proportion of carbon fibers in the carbon fiber strand is usually at least 99% by weight, and typically 100% by weight.
- the glass fiber strand is typically made of only glass fiber, but may contain other fibers as long as the effects of the present invention can be obtained.
- the proportion of glass fiber in the glass fiber strand is usually at least 9.9% by weight, typically 100% by weight.
- the fiber strand of the reinforcing cord of the present invention typically comprises only a carbon fiber strand and a glass fiber strand. However, as long as the effects of the present invention can be obtained, strands made of other fibers may be included.
- the ratio of the sum of the cross-sectional area of the carbon fiber strand and the cross-sectional area of the glass fiber strand to the total cross-sectional area of the fiber strand is usually 95% or more, and typically 100%. It is.
- the carbon fiber strands located in the center of the cord by virtue of their properties, provide the cord with high tensile strength and excellent dimensional stability. Stiffness
- Glass fiber strands have a lower elastic modulus and higher abrasion resistance than carbon fiber strands. By surrounding the carbon fiber strand with such a glass fiber strand, tensile stress and compressive stress can be relieved, and a reinforcing code having high bending fatigue resistance can be obtained. Such an effect cannot be obtained by simply forming a strand by mixing carbon fiber and glass fiber.
- the reinforcing cord of the present invention is a hybrid cord in which carbon fiber strands and glass fiber strands are combined in a special arrangement, and has excellent strength, dimensional stability, and bending fatigue resistance. Further, glass fiber strands generally have higher adhesiveness to rubber than carbon fiber strands, and thus the reinforcing cord of the present invention has excellent adhesiveness to rubber.
- the carbon fiber strand one having a tensile modulus in the range of 155 to 650 GPa is suitably used. Density of such carbon fibers scan Bok land, for example, 1. 74 ⁇ 1. 9 7 g / cm 3. In particular, a strand of 30 to 2000 tex formed by bundling 500 to 25,000 carbon filaments having a diameter of 4 ⁇ m to 8 m is preferably used.
- the total cross-sectional area of the carbon fiber strand is preferably in the range of 20 to 80% of the total of the total cross-sectional area of the carbon fiber strand and the total cross-sectional area of the glass fiber strand.
- the carbon fiber strand located on the center side of the cord contributes to high tensile strength and excellent dimensional stability. However, if the ratio of the carbon fiber strands in the cord is too high, the static strength is improved, but the flexibility may be reduced. Therefore, the total cross-sectional area of the carbon fiber strand should be 80% or less (more preferably 70% or less) of the total of the total cross-sectional area of the carbon fiber strand and the total cross-sectional area of the glass fiber strand. Is good Good.
- the total cross-sectional area of the carbon fiber strand may be 20% or more (more preferably 40% or more) of the total of the total cross-sectional area of the carbon fiber strand and the total cross-sectional area of the glass fiber strand. preferable.
- the carbon fiber strand may be twisted or may not be twisted.
- the number of twists of the carbon fiber strand is preferably 5.0 times or less, that is, 25 mm or less, that is, the number of twists per 25 mm is preferably 5.0 times or less.
- the number of twists of the carbon fiber strand is more preferably 2.5 times / 25 mm or less.
- the surface of the carbon fiber strand may be subjected to a treatment for improving the adhesiveness, that is, a treatment for preventing the fibers from being frayed.
- a film containing rubber may be formed on the surface of the carbon fiber strand, or an adhesive may be applied.
- Such a coating can be formed, for example, by using a processing solution containing a mixture of a resorcinol and formalin precondensate and a rubber latex as a main component (hereinafter may be referred to as “RFL processing solution”).
- RTL processing solution a processing solution containing a mixture of a resorcinol and formalin precondensate and a rubber latex as a main component
- a resole-type condensate obtained by reacting resorcinol and formaldehyde in the presence of an alkaline catalyst for example, alcohol hydroxide
- a resolving agent obtained by reacting resorcinol and formaldehyde in the presence of an acid catalyst Nopolak condensates can be used.
- Glass fiber strands having an elastic modulus of 60 to 80 GPa are preferably used.
- the density of such glass fiber strands is about 2. 5 cm 3 for example, tensile strength, for example 2 50 ⁇ 3 1 0 c NZ dtex (s OSSO gf Zd).
- an E glass fiber filament or a high strength glass fiber filament can be used as the glass fiber used for the glass fiber strand.
- a glass fiber strand is a strand obtained by bundling 200 to 2400 glass filaments (diameter, for example, 7 to 9 m) and twisting them, and having a thickness of 20 to 480 tex. Those in the range are preferably used.
- the glass fiber strand is arranged on the outer peripheral side of the cord, adhesion to the matrix rubber in which the cord is embedded is important.
- the adhesion between the glass fiber strand and the matrix rubber should be improved by applying a treatment for improving the adhesion to the glass fiber strand or by twisting the glass fiber strand. Can be.
- the surface of the glass fiber strand may be treated with a treatment liquid (RFL treatment liquid) mainly containing a mixture of a condensate of resorcin and formalin and rubber latex.
- RTL treatment liquid a treatment liquid mainly containing a mixture of a condensate of resorcin and formalin and rubber latex.
- a film containing rubber may be formed on the surface of the glass fiber strand by another method.
- an adhesive may be applied to the surface of the glass fiber strand.
- a treatment for improving the adhesiveness of the surface of the glass fiber strand may be performed using an epoxy compound or an isocyanate compound.
- the glass fiber strand may be ply-twisted with a twist number in the range of 0.25 to 5.0 turns Z25 mm. By setting the number of burns in this range, the bending fatigue resistance can be improved.
- the reinforcing cord may be twisted in a direction opposite to the direction of the glass fiber strand. According to this configuration, Twist return can be reduced.
- the reinforcing cord of the present invention may be twisted.
- the number of twists is preferably in the range of 0.5 to 10 turns / 25 mm.
- a coating (overcoat layer) containing rubber may be formed on the surface of the reinforcing cord of the present invention.
- This coating is preferably selected according to the matrix rubber in which the cord is embedded.
- the matrix rubber is a hydrogenated nitrile rubber-based rubber
- FIG. 1 shows an example of the reinforcing cord of the present invention.
- the code 10 in Fig. 1 is composed of a carbon fiber strand 11 placed at the center, a plurality of glass fiber strands 12 placed around the carbon fiber strand 11, and all the strands.
- Overcoat layer 13 (hatching is omitted) formed so as to cover the surface.
- a coating 1 a is formed, and on the surface of the glass fiber strand 12, a coating 12 a is formed. Note that the coatings 11 a and 12 a and the coating layer 13 may be omitted.
- FIG. 2 schematically illustrates the arrangement of the carbon fiber strands 11 and the glass fiber strands 12 when the reinforcing cord of the present invention is provided with a twist.
- the plurality of glass fiber strands 12 are spirally arranged around the carbon fiber strand 11.
- the number of carbon fiber strands 11 and the number of glass fiber strands 12 are selected according to the properties required for the cord and the properties of the strands.
- Preferred ratio of [number of carbon fiber strands] / [number of glass fiber strands] Preferred examples include [1] / [3-30], [2] Z [6-30] and [3] / [10-40].
- a plurality of carbon fiber strands may be bundled and twisted or may not be twisted.
- Carbon fiber strands often have lower adhesion to matrix rubber than glass fiber strands. Therefore, it is preferable to arrange a plurality of glass fiber strands so as to surround the carbon fiber strand so that the carbon fiber strand does not come into contact with the matrix rubber.
- the cord of the present invention can be manufactured by a known method. An example of a method for manufacturing the cord of the present invention will be described below.
- Fiber strands can be formed by bundling fiber filaments. Strands may be added with a twist. Also, a plurality of strands may be bundled and twisted to form one strand. The formed strand may be subjected to a specific treatment, for example, treatment with an RFL treatment solution.
- the strand When a film is formed using the RFL treatment liquid, the strand may be immersed in the RFL treatment liquid and then heat-treated.
- the rubber latex used in the RFL treatment solution includes acrylic rubber-based latex, urethane rubber-based latex, styrene / butadiene rubber-based latex, nitrile rubber-based latex, and chlorosulfonated polyethylene-based latex. Modified latex or a mixture thereof can be used.
- the coating may be formed using a general adhesive such as an epoxy compound or an isocyanate compound.
- the carbon fiber strand and the glass fiber strand can be bound by a known method.
- the bundle can be bundled using a guide having a central guide hole and a plurality of outer peripheral guide holes arranged around the central guide hole. Duplicate The number of outer peripheral guide holes are arranged at substantially equal distances from the center of the central guide hole.
- One or more carbon fiber strands are passed through the central guide hole.
- the carbon fiber strand may be non-twisted or pre-twisted.
- the glass fiber strand is passed through the outer peripheral guide hole.
- the glass fiber strand is preferably twisted. These strands are twisted and bundled.
- the number of twists of the first twist is preferably about 0.5 to 10 turns / 25 mm, and the direction of the twist may be the same as the direction of the lower twist of the glass fiber strand, It may be in the opposite direction.
- a cord having higher bending fatigue resistance can be obtained by setting the first twist and the first twist in the same direction, that is, by using a so-called Lang twist.
- the apparatus for producing the cord of the present invention is not limited, and various apparatuses, for example, a ring twisting machine, a flyer single twisting machine, a twisting wire machine, and the like can be used.
- a rubber coating (overcoat layer) May be formed.
- the rubber coating can increase the affinity between the cord and the matrix rubber.
- the rubber for the rubber coating hydrogenated nitrile rubber, chlorosulfonated polyethylene rubber (CSM), chloroprene rubber, natural rubber, urethane rubber and the like can be used. These rubbers are used with a crosslinking agent.
- the rubber of the rubber film is usually selected from known rubbers according to the type of the matrix rubber.
- the amount of the rubber coating is not particularly limited, but is preferably 2.0 to 10.0% by weight based on the weight of the cord before the rubber coating is formed.
- the cord of the present invention can be used for reinforcing various rubber products and rubber members.
- rubber belts such as toothed belts and moving belts and rubber belts can be used.
- the reinforcing cord of the present invention may be used in the form of a single rope or in the form of a sheet-like reinforcing material.
- the sheet-like reinforcing material is obtained by loosely bonding a plurality of the cords arranged in parallel.
- the rubber product of the present invention includes a rubber portion and a reinforcing cord embedded in the rubber portion, and the reinforcing cord is the above-described reinforcing cord of the present invention.
- the present invention is applied to various rubber products and rubber members, for example, rubber belts such as toothed belts and moving belts, rubber crawlers, tire cords, and the like.
- the ratio occupied by the reinforcing cord of the present invention is preferably in the range of 10 to 70% by weight.
- the amount and arrangement of the reinforcing cords of the present invention are determined according to the characteristics required for the rubber product.
- FIG. 3 shows an exploded perspective view of the toothed belt 30.
- the toothed belt 30 includes a main body 31 and a plurality of cords 32 embedded in the main body 31.
- the main body 31 is made of rubber or rubber and other materials.
- the cord 32 is the reinforcing cord of the present invention, and is arranged in parallel with the moving direction of the toothed belt 30.
- Known members can be applied to portions other than the code 32.
- the carbon fiber strand was impregnated with the RFL treatment solution, it was heat-treated (at 180 ° C for 120 seconds) and dried. Thus, a carbon fiber strand (coating 20% by weight) on which a coating was formed was produced.
- the carbon fiber strand is made up of 600,000 bundles of carbon fiber filaments (diameter 7.0 tm).
- Use proof carbon fiber scan Bok land (400 tex, an outer diameter of about 0. 76 mm, elastic modulus 2 3 5 GP a, density of about 1. 7 6 g_ cm 3, untwisted products, Toho Tenax Co., Ltd., Ltd.) Was.
- the RFL treatment solution includes a resorcinol formalin condensate solution (solid content 8%, vinylpyridine-styrene-butadiene latex (solid content 40% by weight)) and a chlorosulfonated polyethylene glycol dispersion (solid content 40%). % By weight) and a solid content ratio of 2: 13: 6.
- a glass fiber strand (about 100 tex, outer diameter about 0.35 mm, elastic modulus 70 GPa, density about 2.5 g / cm 3 , coating 20% by weight) on which a coating was formed was prepared.
- This glass fiber strand is heat-treated (dried at 180 ° C for 120 seconds) after impregnating a strand of 600 glass fiber filaments (E glass composition, diameter 9 Atm) into a strand and bundling it with an RFL treatment solution. , And then manufactured by adding a ply twist (2.0 times Z25 mm) in the S direction.
- the first cord (about 1.15 mm in diameter) was obtained.
- the cross-sectional area of the carbon fiber strand was 34% of the sum of the cross-sectional area of the carbon fiber strand and the total cross-sectional area of the glass fiber strand.
- the number of the first cord (lin e a r de n si t y) was 1650 tex, that is, the weight per 1 000 m of the length was 1650 g.
- An overcoat treatment agent having the composition shown in Table 1 was applied to the first cord and dried to obtain a second cord having an overcoat layer formed thereon.
- the weight of the bar code layer was 5% by weight of the first cord.
- the tensile strength per cord and the elongation at break (%) were measured.
- the tensile load per cord was measured when the tensile load was applied to the cord and the elongation of the cord length reached 0.4%. The greater the tensile load during elongation, the better the dimensional stability.
- the initial tensile strength was 71 ON / cord.
- the elongation at break was 2.7%.
- the tensile load was 11 ON / cord.
- one second cord is sandwiched between two rubber sheets (width: 100 mm, length: 300 mm, thickness: 1 mm) and pressed from both sides at 150 ° C for 20 minutes.
- a strip-shaped sample was prepared by sulfuration.
- the rubber sheet was formed by blending the components shown in Table 2.
- the obtained sample was subjected to a bending test using a bending tester 40 shown in FIG.
- the bending tester 40 is composed of one flat burry 4 1 with a diameter of 25 mm. , A motor (not shown), and four guide pulleys 42.
- the manufactured sample 43 was mounted on five pulleys.
- one end 43 a of the sample 43 was attached with a weight, and an initial tension of 9.8 N was applied to the sample 43.
- the other end 4 3b of the sample 43 was reciprocated 10,000 times in the direction of the arrow in FIG. 4 with a movement width of 10 cm, and the sample 43 was repeatedly bent at the flat pulley 41. .
- the bending test was performed at room temperature.
- Example 1 After performing the bending test on Sample 43 in this way, the tensile strength of the sample after the bending test was measured. Then, when the tensile strength of the sample before the bending test was set to 100%, the retention (%) of the tensile strength of the sample after the bending test was determined. The higher the value of the retention ratio of the tensile strength, the better the flex fatigue resistance. The sample of Example 1 had a retention of tensile strength of 83%.
- Example 2 a carbon fiber strand provided with a coating was produced, and a priming twist (2.0 times, 25 mm) was added in the S direction.
- a first cord (diameter: 1.18 mm) was produced in the same manner as in Example II, except that the carbon fiber strands thus obtained were used.
- the number of this first code was 1770 teX, that is, the weight per 1100 m length was 1770 g.
- Example 2 Next, in the same manner as in Example 1, an overcoat layer was formed on the surface of the first cord. Thus, a second cord having an overcoat layer was obtained. The weight of the bar coat layer was 5% by weight of the first cord. This second code was evaluated in the same manner as in Example 1. Also, a bending test sample was prepared and a bending test was performed in the same manner as in Example 1.
- the initial tensile strength per cord was 1080 N / cord.
- the elongation at break was 2.1%.
- 0.4% expansion code The tensile load per strand was 200 N / cord.
- the tensile strength retention after the bending test was 71%.
- a cord was produced without using a carbon fiber strand.
- the glass fiber strand used in Example 1 that is, the glass fiber strand which had been RFL-treated and twisted in the S direction was prepared.
- One glass fiber strand is bundled and twisted in the Z direction (2.0 times, 25 mm) to obtain a first cord (about 1.13 mm in diameter) containing no carbon fibers.
- the number of this first cord was 144,000 tex, that is, the weight per 100,000 m of length was 144,0 g.
- Example 2 Next, in the same manner as in Example 1, an overcoat layer was formed on the surface of the first cord. Thus, a second cord having an overcoat layer was obtained. The weight of the overcoat layer was 5% by weight of the cord. This second code was evaluated in the same manner as in Example 1. A sample for a bending test was prepared and a bending test was performed in the same manner as in Example 1.
- the initial tensile strength per cord was 890 N / cord.
- the elongation at break was 3.4%.
- the tensile load per cord at the time of 0.4% elongation was 80 N / cord.
- the tensile strength retention after the bending test was 51%.
- a cord was produced without using a glass fiber strand. Specifically, first, a carbon fiber strand (800 tex, an elastic modulus of 240 GPa, a density of about 1. Twisted strand (2.0 times Z25 mm) was added to 80 gZcm 3 , non-twisted product, manufactured by Toho Tenax Co., Ltd., and the overcoat treatment agent was applied and dried. In this way, a code with a talent bar (Diameter: .about.10 mm). The count of this code was 114 tex, that is, the weight per 100 m length was 114 g. The weight of the overcoat layer was 5% by weight of the cord. This code was evaluated in the same manner as in Example 1. Also, a bending test sample was prepared and a bending test was performed in the same manner as in Example 1.
- the initial tensile strength per cord was 144 N / cord.
- the elongation at break was 2.1%.
- the tensile load per cord at the time of 0.4% elongation was 90 N / cord.
- the tensile strength retention after the bending test was 68%.
- Table 3 shows the type of strand, the number of strands, the tensile load at 0.4% elongation, and the tensile strength retention for Example 2 and Comparative Examples 1 and 2.
- the cords of Examples 1 and 2 had a high tensile load at 0.4% elongation and a high retention of tensile strength, and were excellent in dimensional stability and flexural fatigue resistance.
- the cord of Comparative Example 1 in which only glass fiber strands were used as the reinforcing fibers, had low tensile load and tensile strength retention during elongation, and both dimensional stability and flex fatigue resistance. It was inferior to the codes of Examples 1 and 2.
- the cord of Comparative Example 2 using only carbon fiber strands as the reinforcing fiber has a tensile load during elongation. The weight and tensile strength retentions were higher than the cords of Comparative Example 1, but were inferior to the cords of Examples 1 and 2.
- the cord of Example 1 had a higher tensile strength retention after the bending test and a lower tensile load during elongation than the cord of Example 2. Therefore, the cord of Example 1 is more excellent in bending fatigue resistance than the cord of Example 2. Further, the cord of the second embodiment has better dimensional stability than the cord of the first embodiment.
- the twist record increases the bending fatigue resistance as the number of twists increases, and improves the dimensional stability as the number of burns decreases.
- the twist is also applied to the carbon fiber strand (without the twist).
- about 2.0 times of 25 mm twist is applied to the carbon fiber strand in the Z direction.
- the twisting in the Z direction when the twisting in the Z direction is performed, the twisting of the carbon fiber strand (the twisting in the S direction) is reduced, and the twisting is almost eliminated. It is considered that a difference in performance between the cord of Example 1 and the cord of Example 2 was caused by the difference between the twists.
- the actual number of twists of the carbon fiber strand after twisting should be in the range of 0.5 to 5.0 turns / "25 mm when bending fatigue resistance is important.
- the dimension is less than 0.5 times 25 mm (including the case of non-twisting).
- a reinforcing cord having sufficient tensile strength for reinforcing rubber products, high dimensional stability and high bending fatigue resistance can be obtained.
- the rubber can be applied to various rubber products, and is particularly suitably used for rubber products that require high dimensional stability and high bending fatigue resistance.
- the cord is suitably used for a toothed belt such as a timing belt or a rubber crawler.
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Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/550,865 US7682274B2 (en) | 2003-04-09 | 2004-04-07 | Reinforcing cord for rubber reinforcement and rubber product including the same |
CA002519393A CA2519393A1 (en) | 2003-04-09 | 2004-04-07 | Reinforcing cord for rubber reinforcement and rubber product including the same |
EP04726295A EP1616993B1 (en) | 2003-04-09 | 2004-04-07 | Reinforcing cord for reinforcing rubber and rubber product using the same |
JP2005505308A JP4295763B2 (ja) | 2003-04-09 | 2004-04-07 | ゴムを補強するための補強用コードおよびそれを用いたゴム製品 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003105709 | 2003-04-09 | ||
JP2003-105709 | 2003-04-09 |
Publications (1)
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WO2004090224A1 true WO2004090224A1 (ja) | 2004-10-21 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/005037 WO2004090224A1 (ja) | 2003-04-09 | 2004-04-07 | ゴムを補強するための補強用コードおよびそれを用いたゴム製品 |
Country Status (7)
Country | Link |
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US (1) | US7682274B2 (ja) |
EP (1) | EP1616993B1 (ja) |
JP (1) | JP4295763B2 (ja) |
KR (1) | KR100635355B1 (ja) |
CN (1) | CN100582359C (ja) |
CA (1) | CA2519393A1 (ja) |
WO (1) | WO2004090224A1 (ja) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2009063952A1 (ja) | 2007-11-15 | 2009-05-22 | Nippon Sheet Glass Company, Limited | 補強用コードおよびそれを用いたゴム製品 |
US8176719B2 (en) | 2007-11-15 | 2012-05-15 | Nippon Sheet Glass Company, Limited | Reinforcing cord and rubber product using the same |
JP5367582B2 (ja) * | 2007-11-15 | 2013-12-11 | 日本板硝子株式会社 | 補強用コードおよびそれを用いたゴム製品 |
US9046149B2 (en) | 2008-06-19 | 2015-06-02 | Dayco Europe S.R.L. | Starter alternator assembly comprising a poli-V belt and poli-V belt |
WO2014168070A1 (ja) * | 2013-04-11 | 2014-10-16 | 横浜ゴム株式会社 | スチールコードおよびゴム製品の製造方法 |
AU2014251811B2 (en) * | 2013-04-11 | 2016-08-04 | The Yokohama Rubber Co., Ltd. | Steel cord and method for manufacturing rubber product |
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US11427959B2 (en) | 2015-12-21 | 2022-08-30 | Nippon Sheet Glass Company, Limited | Rubber-reinforcing cord and rubber product using same |
JPWO2017110076A1 (ja) * | 2015-12-21 | 2018-10-04 | 日本板硝子株式会社 | ゴム補強用コード及びそれを用いたゴム製品 |
JP2018090188A (ja) * | 2016-12-07 | 2018-06-14 | 横浜ゴム株式会社 | 空気入りタイヤ及びその製造方法 |
JP2018162013A (ja) * | 2017-03-27 | 2018-10-18 | 横浜ゴム株式会社 | 空気入りタイヤ |
WO2018181112A1 (ja) * | 2017-03-27 | 2018-10-04 | 横浜ゴム株式会社 | 空気入りタイヤ |
US10780746B2 (en) | 2017-03-27 | 2020-09-22 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
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WO2019111639A1 (ja) | 2017-12-07 | 2019-06-13 | 三ツ星ベルト株式会社 | 摩擦伝動ベルト、そのためのコード並びにそれらの製造方法 |
US11879520B2 (en) | 2017-12-07 | 2024-01-23 | Mitsuboshi Belting Ltd. | Friction transmission belt, cord for same, and manufacturing method for same |
WO2019116766A1 (ja) * | 2017-12-14 | 2019-06-20 | 株式会社ブリヂストン | タイヤ用補強部材およびこれを用いたタイヤ |
JPWO2019116766A1 (ja) * | 2017-12-14 | 2020-12-17 | 株式会社ブリヂストン | タイヤ用補強部材およびこれを用いたタイヤ |
EP3725543A4 (en) * | 2017-12-14 | 2021-07-07 | Bridgestone Corporation | TIRE REINFORCEMENT ELEMENT AND TIRE USING IT |
WO2022097369A1 (ja) * | 2020-11-06 | 2022-05-12 | カジレーネ株式会社 | 線状構造体 |
JP2022075269A (ja) * | 2020-11-06 | 2022-05-18 | 株式会社三ツ星 | ケーブル |
CN114837002A (zh) * | 2022-05-18 | 2022-08-02 | 江苏帝威新材料科技发展有限公司 | 一种水泥混凝土构件用高粘结力碳纤维复合筋及制备方法 |
Also Published As
Publication number | Publication date |
---|---|
KR100635355B1 (ko) | 2006-10-18 |
CN100582359C (zh) | 2010-01-20 |
US20070098983A1 (en) | 2007-05-03 |
CN1771365A (zh) | 2006-05-10 |
EP1616993A4 (en) | 2007-08-01 |
KR20050121242A (ko) | 2005-12-26 |
CA2519393A1 (en) | 2004-10-21 |
US7682274B2 (en) | 2010-03-23 |
JPWO2004090224A1 (ja) | 2006-07-06 |
EP1616993A1 (en) | 2006-01-18 |
EP1616993B1 (en) | 2012-04-18 |
JP4295763B2 (ja) | 2009-07-15 |
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