WO2015156406A1 - 樹脂-金属複合材料およびそれを用いたタイヤ - Google Patents
樹脂-金属複合材料およびそれを用いたタイヤ Download PDFInfo
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- WO2015156406A1 WO2015156406A1 PCT/JP2015/061292 JP2015061292W WO2015156406A1 WO 2015156406 A1 WO2015156406 A1 WO 2015156406A1 JP 2015061292 W JP2015061292 W JP 2015061292W WO 2015156406 A1 WO2015156406 A1 WO 2015156406A1
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- Prior art keywords
- resin
- metal material
- metal
- tire
- composite material
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/005—Reinforcements made of different materials, e.g. hybrid or composite cords
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0041—Compositions of the carcass layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/01—Inflatable pneumatic tyres or inner tubes without substantial cord reinforcement, e.g. cordless tyres, cast tyres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/0007—Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0606—Reinforcing cords for rubber or plastic articles
- D07B1/0666—Reinforcing cords for rubber or plastic articles the wires being characterised by an anti-corrosive or adhesion promoting coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C2001/005—Compositions of the bead portions, e.g. clinch or chafer rubber or cushion rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/0007—Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal
- B60C2009/0014—Surface treatments of steel cords
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3021—Metals
- D07B2205/3085—Alloys, i.e. non ferrous
- D07B2205/3089—Brass, i.e. copper (Cu) and zinc (Zn) alloys
Definitions
- the present invention relates to a resin-metal composite material (hereinafter also simply referred to as “composite material”) and a tire using the same, and more particularly, to a resin-metal composite related to improvement in adhesion between the resin material and the metal material.
- composite material hereinafter also simply referred to as “composite material”
- the present invention relates to a material and a resin tire using the material.
- Patent Document 1 discloses a steel cord formed by coating a steel wire with a thermoplastic elastomer composition in which an elastomer composition is dispersed in a matrix of a thermoplastic resin.
- a pneumatic tire used as a tire reinforcing material is disclosed.
- Patent Document 1 relates to a steel cord in which a steel wire is coated with a thermoplastic elastomer composition containing an elastomer component, and studies are made on the corrosion resistance and bending resistance of the steel cord.
- a thermoplastic elastomer composition containing an elastomer component containing an elastomer component
- the inventor performed specific surface treatment on the metal material prior to combining the metal material and the resin material, and a specific thermoplastic resin as the resin material combined with the metal material. It has been found that high adhesion between the resin material and the metal material can be obtained by using the main component, and the present invention has been completed.
- the resin-metal composite material of the present invention is a resin-metal composite material including a metal material and a resin material that covers at least a part of the surface of the metal material, Copper and zinc on the surface of the metal material, wherein the resin material is mainly composed of a thermoplastic resin having a polar group, the surface of the metal material is treated with a buffer solution having a pH of 5 or more and pH 7.2 or less.
- the abundance ratio of copper in the total amount (Cu / (Cu + Zn) ⁇ 100) is 55 to 95% by mass.
- the thermoplastic resin having a polar group is preferably maleic acid-modified polyolefin.
- the surface of the metal material treated with the buffer is preferably further treated with an aqueous solution of a heterocyclic compound having two or more heteroatoms.
- the heterocyclic compound it is preferable to use triazoles, particularly triazole having an amino group.
- the surface of the metal material refers to a depth of several nm from the surface.
- the resin tire of the present invention includes an annular tire skeleton formed of a resin material, and a reinforcing layer made of a reinforcing member wound around the outer periphery of the tire skeleton,
- the reinforcing member is made of the resin-metal composite material of the present invention.
- (A) is a cutaway perspective view showing a part of the example of the tire of the present invention in section, (b) is a part in section in the vicinity of the bead portion with the tire fitted to the rim. It is a notch perspective view shown.
- the resin-metal composite material of the present invention includes a metal material and a resin material that covers at least a part of the surface thereof.
- a resin material mainly composed of a thermoplastic resin having a polar group is used, and a metal material whose surface is treated with a buffer solution having a pH of 5 or more and pH 7.2 or less. The point to use is important.
- lubricants and rust preventive agents may be attached to the surface of metal materials. It is considered that the adhesion with the resin material is hindered.
- a metal oxide such as copper or zinc constituting the plating layer forms a film on the surface of the metal material, and similarly adheres the metal material to the resin material. It is thought to prevent. Therefore, the surface of the metal material is appropriately activated to a state suitable for adhesion to the resin material by removing at least a part of the coating film present on the surface of the metal material by the treatment using the buffer solution. Therefore, the adhesiveness between the metal material and the resin material can be improved.
- a buffer solution having a pH of 5 or more and pH 7.2 or less is used as the buffer used for the pretreatment.
- the pH of the treatment liquid may fluctuate, it is advantageous that the treatment liquid is the buffer solution because the pH is less likely to fluctuate.
- the pH of the buffer solution exceeds 7.2, it is difficult to remove the coating film present on the surface of the metal material, and the initial adhesiveness between the metal material and the resin material decreases.
- the pH of the buffer solution is less than 5, it adversely affects the surface of the metal material, the heat-and-moisture resistance and adhesion durability are lowered, the metal material is easily corroded, and the durability of the metal material is reduced. Getting worse.
- the pH of the buffer solution is preferably 5.0 to 6.4 from the viewpoint of the adhesion between the metal material and the resin material and the durability of the metal material.
- the copper abundance ratio (Cu / (Cu + Zn) ⁇ 100) in the total amount of copper and zinc on the surface of the metal material after the treatment with the buffer is 55 to 95% by mass.
- the point is important. Thereby, the high adhesiveness between the resin material and the metal material can be ensured, and the drawing force and the adhesion durability can be obtained in a balanced manner. If the copper content is less than 55%, sufficient adhesiveness with the resin material cannot be obtained. On the other hand, if it exceeds 95% by mass, the durability at the bonding interface is lowered.
- the proportion of copper is preferably 60 to 95% by mass, more preferably 70 to 95% by mass from the viewpoint of improving the drawing force and adhesion durability in a balanced manner.
- the buffer solution contains at least one acid.
- Such acid is not particularly limited. From the viewpoint of adhesion between the metal material and the resin material and durability of the metal material, a weak acid is preferable, and an acid having an acid dissociation constant (pKa) of 4 to 8 is more preferable.
- a weak acid is preferable, and an acid having an acid dissociation constant (pKa) of 4 to 8 is more preferable.
- acetic acid, phosphoric acid, phthalate Examples include acids, succinic acid, citric acid, and carbonic acid. Of these, acetic acid and phosphoric acid are preferable. Only 1 type may be used for an acid, and 2 or more types may be mixed and used for it.
- the buffer solution examples include acetic acid-sodium acetate buffer solution, sodium dihydrogen phosphate-disodium hydrogen phosphate buffer solution, potassium hydrogen phthalate-sodium hydroxide buffer solution, sodium citrate-sodium hydroxide solution.
- the buffer examples include succinic acid-sodium tetraborate buffer. Of these, an acetic acid-sodium acetate buffer and a sodium dihydrogen phosphate-disodium hydrogen phosphate buffer are preferred.
- the metal component contained in the buffer is preferably sodium or potassium. It is preferable that other metals are not substantially contained in the buffer solution from the viewpoint of the ease of pH adjustment of the buffer solution or the ease of drainage treatment of the buffer solution after use.
- an inorganic salt, alcohol, or the like may be added as necessary as long as the effects of the present invention are not impaired.
- the temperature of the buffer solution is preferably 10 ° C to 40 ° C, more preferably 15 ° C to 30 ° C.
- any method may be used as long as the metal material and the buffer solution are in contact with each other.
- the metal material is immersed in a tank containing the buffer solution, or
- a technique of spraying a buffer solution on a metal material can be used. This treatment can be performed a plurality of times, for example, spraying a buffer solution on the metal material may be repeated a plurality of times. After immersing the metal material in the buffer solution, washing with water or the like, and again immersing in the buffer solution May be.
- the time during which the metal material is in contact with the buffer solution may be appropriately changed depending on the pH of the buffer solution, and is usually in the range of 0.5 to 20 seconds, preferably 1 to 15 seconds.
- the pH of the buffer solution to be used is small, the surface treatment time is shortened, and when the pH is large, the surface treatment time is lengthened. That is, when the pH of the buffer solution to be used is large, it can be said that the degree of the surface treatment of the metal material can be easily adjusted by adjusting the surface treatment time.
- the metal material after the treatment with the buffer may be washed with water. Since the above buffer solution hardly corrodes the metal material and does not adversely affect the plating layer, it is not necessary to provide a cleaning step as an essential step, but the buffer solution remaining on the surface of the metal material causes corrosion of the metal material. If the plating layer may be adversely affected, it is preferable to provide a cleaning step from the viewpoint of durability of the metal material.
- the water used for washing in this case may be ion exchange water or tap water, but is preferably ion exchange water.
- high adhesion between the metal material and the resin material can also be obtained by treating the surface of the metal material with an aqueous solution of a heterocyclic compound having two or more heteroatoms instead of the buffer solution. It is possible to achieve a resin-metal composite material that secures the property, and by using such a resin-metal composite material, a tire having high durability can be obtained.
- the surface of the metal material is preferably treated with both the buffer solution and the aqueous solution of the heterocyclic compound, and more preferably, the surface of the metal material treated with the buffer solution is further treated. , And treating with an aqueous solution of a heterocyclic compound having two or more heteroatoms. Thereby, the adhesiveness between the metal material and the resin material can be further improved.
- the heteroatoms in the heterocyclic compound are coordinated and bonded to the metal atoms on the surface of the metal material.
- Adsorb By compounding this surface-treated metal material with a thermoplastic resin having a polar group, other heteroatoms in the heterocyclic compound adsorbed on the surface of the metal material are bonded to the polar group of the thermoplastic resin through hydrogen bonding or Since the covalent bond is formed, as a result, strong adhesion occurs between the metal material and the resin material via the heterocyclic compound.
- the surface of the metal material is treated with a buffer prior to the treatment with the aqueous solution of the heterocyclic compound, so that the surface of the metal material is suitable for adhesion to the resin material. Since it is activated moderately, the interaction with the polar group of the heterocyclic compound becomes stronger, and the adhesive force can be improved synergistically. For example, in the case of a metal material having a brass plating layer, since the Cu ratio on the surface can be increased by removing the coating film, the adhesion force is improved by the adhesion mechanism related to the treatment using an aqueous solution of a heterocyclic compound described later. It is considered that a more remarkable effect can be obtained.
- the adhesiveness between the acid-modified polyolefin and the steel cord, which are usually used, is also improved as compared with the conventional one, and an adhesive strength equal to or higher than that of the conventional thermosetting adhesive can be obtained.
- the adhesiveness at room temperature can be improved by 20 to 40% compared to the conventional case by pulling force.
- heterocyclic compound having two or more hetero atoms, preferably three or more hetero atoms. It is preferable to use two or more 5-membered cyclic compounds and 6-membered cyclic compounds.
- the hetero atom include N, P, O, and S. Among them, those in which the hetero atom is N or O are preferable, and those having two or more N atoms are more preferable.
- Specific examples of such heterocyclic compounds include triazoles, imidazoles, oxazolines, triazines, pyrazines and the like.
- triazoles and triazines are particularly preferable, and triazoles are most preferable from the viewpoint that adhesive strength can be further improved.
- triazoles include benzotriazole, 1,2,3-triazole, 1,2,4-triazole, 4-amino-1,2,4-triazole and the like, and in particular, has an amino group. Triazole is preferred.
- each derivative can also be used, what does not contain a sulfur atom is preferable.
- the concentration of the aqueous solution varies depending on the type of heterocyclic compound to be used, but is preferably 0.01 g / L to 100 g / L, more preferably 0.1 g / L to 10 g / L.
- concentration is less than 0.01 g / L, the effect of the surface treatment is weakened, and the effect of improving the adhesion may not be sufficient.
- concentration exceeds 100 g / L, the heterocyclic compound cannot be completely dissolved and dispersed as a solid in the liquid, or aggregated and precipitated on the surface of the metal material after treatment, which is preferable for adhesion. There is no concern to affect.
- the pH of the aqueous solution is preferably in the range of 4 to 10, more preferably in the range of 5 to 9.5.
- the pH is less than 4, oxidation of the metal material surface proceeds and there is a concern that the metal material surface rusts after being integrated with the resin material.
- the pH exceeds 10
- the surface of the metal material becomes a hydroxide and the degree of interaction with the heterocyclic compound becomes weak, and in the resulting resin-metal composite material, between the metal material and the resin material, Adhesive strength decreases.
- the temperature of the aqueous solution is preferably from ⁇ 5 ° C. to 60 ° C., more preferably from 0 ° C. to 50 ° C. If the liquid temperature is lower than ⁇ 5 ° C., the aqueous solution may freeze. On the other hand, if it exceeds 60 ° C., a change in aqueous solution concentration or a loss of liquid volume may be a problem due to evaporation of moisture.
- any method for treating the surface of the metal material using the aqueous solution of the heterocyclic compound any method can be used as long as the metal material and the aqueous solution are in contact with each other.
- the metal material is immersed in a bath containing the aqueous solution.
- a method of wiping the metal material with a sponge, cotton, cloth or the like impregnated with an aqueous solution can be used.
- the treatment time is preferably 0.2 seconds or more and less than 60 seconds, and particularly preferably 0.5 seconds or more and 30 seconds or less. If the immersion time is less than 0.2 seconds, there is a concern that the treatment does not proceed sufficiently.
- the metal material used in the present invention include those made of metals such as iron, steel (stainless steel), lead, aluminum, copper, brass, bronze, monel metal alloy, nickel, and zinc.
- the surface may have a plating layer such as zinc plating, copper plating, bronze plating, or brass (brass) plating.
- a metal material having bronze plating or brass plating as the plating layer, particularly brass plating is preferable because the surface is appropriately activated by the buffer solution and the adhesion to the resin material is improved.
- the ratio between Cu and Zn (internal) during brass plating (Cu: Zn) is usually 60:40 to 70:30 on a mass basis, but the surface composition is different from the bulk (internal) and Zn rich.
- the abundance ratio of Cu on the surface of the metal material enriched with Zn can be increased.
- the thickness of the brass plating layer is usually 100 nm to 300 nm.
- a metal material a metal wire, a metal plate, a metal chain etc. are mentioned, for example.
- a steel wire which is a general-purpose reinforcing metal material, generally refers to steel, that is, a linear metal containing iron as a main component (the mass of iron exceeds 50 mass% with respect to the total mass). It may be composed only of iron, or may contain metals other than iron, such as zinc, copper, aluminum, and tin.
- the steel wire preferably has a wire diameter of 0.1 mm to 5.5 mm, and more preferably 0.15 mm to 5.26 mm.
- the wire diameter of the steel wire refers to the longest length in a cross-sectional shape perpendicular to the axis.
- the cross-sectional shape perpendicular to the axis of the steel wire is not particularly limited, and may be elliptical, rectangular, triangular, polygonal or the like, but is generally circular.
- Steel cords used for tires are usually formed by single-sided steel wire manufactured by dry plating and wet wire drawing, or by twisting multiple steel wires. It consists of twisted wires.
- thermoplastic resin used as the resin material in the present invention may be any resin having a polar group such as a carboxyl group (—COOH), a hydroxyl group (—OH), and an amino group (—NH 2 ).
- thermoplastic resin examples include urethane resins, olefin resins such as polypropylene (PP) and polyethylene (PE), vinyl chloride resins, and polyamide resins.
- thermoplastic elastomer examples include amide-based thermoplastic elastomer (TPA), ester-based thermoplastic elastomer (TPC), olefin-based thermoplastic elastomer (TPO), and styrene-based thermoplastic elastomer (TPS) specified in JISK 6418. ), Urethane thermoplastic elastomer (TPU), crosslinked thermoplastic rubber (TPV), or other thermoplastic elastomer (TPZ).
- TPA amide-based thermoplastic elastomer
- TPC ester-based thermoplastic elastomer
- TPO olefin-based thermoplastic elastomer
- TPS styrene-based thermoplastic elastomer
- TPU Urethane thermoplastic elastomer
- maleic anhydride-modified polyolefin having a maleic acid group as a polar group is preferable because of excellent adhesion to a metal material.
- maleic anhydride-modified PP examples include modic manufactured by Mitsubishi Chemical Corporation and admer manufactured by Mitsui Chemicals.
- general-purpose additives such as inorganic fillers, antioxidants, and UV absorbers may be added, and the content of these additives in the resin material is added to the surface of the metal material. It is 20 mass% or less with respect to the total mass of the layer of the resin material to provide.
- the resin-metal composite material of the present invention is such that at least a part of the surface of the surface-treated metal material is coated with the resin material. It has high adhesion to metal materials.
- the resin-metal composite material of the present invention can be applied to various resin products or resin members made of a resin material and reinforced with a metal material, and can exhibit excellent durability. Specifically, for example, it can be suitably applied to tires, belts, hoses and the like manufactured using resin materials, and is particularly useful when applied to resin tires that require high safety durability. .
- the resin material and the metal material can be integrated by melting the resin material and covering at least a part of the surface of the surface-treated metal material.
- Any method may be used as long as it is used, and there is no particular limitation.
- a method of applying a molten resin material on the surface of the metal material a method of injection molding in which the molten resin material is poured into a mold in which the metal material is arranged, and cooling, the metal
- a method of setting the material in a compression mold and pouring the resin material can be used.
- the thickness of the resin material covering the metal material is not particularly limited, and can be appropriately selected according to the resin product to which the composite material is applied, the application site, and the like.
- a resin material layer having a layer thickness of about 0.1 mm to 5.0 mm may be formed on the surface of the metal material to form a composite material, or the metal material may be directly embedded in a part of a product made of the resin material. , May be combined.
- FIG. 1A is a cutaway perspective view showing a part of the example of the resin tire of the present invention in cross section, and FIG. It is a notch perspective view shown by.
- the tire 10 has a cross-sectional shape substantially the same as that of a conventional general rubber pneumatic tire, and includes an annular skeleton made of a resin material at least from the side portion to the crown portion.
- the illustrated tire 10 includes a pair of left and right bead portions 11 that contact the bead seat portion 21 and the rim flange 22 of the rim 20, a sidewall portion 12 that extends outward from the bead portion 11 in the tire radial direction, and between the sidewall portions 12.
- the resin material and the reinforcing material forming the tire skeleton are used. Since the adhesiveness with a certain metal material can be improved, the resin tire excellent in durability compared with the past can be obtained.
- skeleton part of a resin tire may use the same thing, and may use a different thing.
- the reinforcing member of the crown portion reinforcing layer 2 may be entirely embedded in the crown portion 13 or may be partially embedded in the crown portion 13, but the entire reinforcing member is embedded in the crown portion 13. Most preferably.
- the reinforcing member may be made of a reinforcing cord in which a metal wire is covered with a resin material, or may be made of a sheet-shaped reinforcing material in which a metal wire is covered with a resin material.
- the tire case 1 has a pair of annular tire halves 1A having the same shape, each of which has a bead portion 11 and a sidewall portion 12 on one side and a crown portion 13 having a half width formed integrally with each other. It can be formed by joining together on the tire equator plane.
- the tire case 1 is not limited to one formed by joining two members in this way, but may be formed by joining three members, or a pair of bead portions 11 and sidewall portions. 12 and the crown part 13 straddling between both side wall parts may be integrally molded. Further, the tire case may be formed into a complete tube shape in which the ends of the bead portion on the inner side in the tire radial direction extend and are connected to the inner side in the tire axial direction.
- a welding method using a molten resin or a hot plate welding method can be used as a joining method at the time of forming a tire case by joining a plurality of members.
- the molten resin used at this time may be of the same type as the resin material constituting the tire case or may be of a different type.
- the tire half body 1A or the tire case 1 is formed by, for example, placing the bead core 4 and the reinforcing member constituting the crown portion reinforcing layer 2 in the same mold and injection-molding them using the molten resin material R. Can be manufactured.
- thermosetting resin having a rubber-like elasticity, a thermoplastic resin, a thermoplastic elastomer (TPE), or the like can be used.
- TPE thermoplastic elastomer
- the thermoplastic resin and the thermoplastic elastomer the same materials as those mentioned for the resin material used for the composite material can be used, and among them, TPA, TPC, TPO, TPU, and TPV are preferable.
- thermosetting resin a phenol resin, a urea resin, a melamine resin, an epoxy resin, a polyester resin etc. are mentioned, for example.
- the tire case 1 may be entirely formed of a single resin material, and for each part of the tire case 1 (bead portion 11, sidewall portion 12, crown, as in a conventional general rubber pneumatic tire) A resin material having different characteristics may be used for the portion 13 and the like. Further, the tire case 1 can be reinforced by embedding a reinforcing material, for example, a polymer material, a metal fiber, a cord, a nonwoven fabric, a woven fabric, or the like in each portion.
- a reinforcing material for example, a polymer material, a metal fiber, a cord, a nonwoven fabric, a woven fabric, or the like in each portion.
- the load deflection temperature at 0.45 MPa conforming to the ISO75-2 or D648 standard is 60 ° C. or more, particularly 85 to 130 ° C.
- the resin material preferably has a tensile yield point strength of 10 MPa or more, particularly 15 to 50 MPa, and a tensile yield point elongation of 10% or more, particularly 15 to 35%.
- the resin material has a breaking elongation of 50% or more, particularly 100 to 600%, and a Vicat softening point in accordance with the K7206 A method of 130 ° C. or more, particularly 150 to 300 ° C. preferable.
- the bead portion 11 has an annular shape made of resin or metal, similar to a conventional general pneumatic tire, in order to ensure the rigidity of the bead portion 11 and improve the fitting property with the rim.
- a bead core 4 is embedded.
- the metal material constituting the bead core 4 include steel cords, and various organic fiber cords can be used as the resin material.
- the composite material of the present invention can also be applied to the bead core 4.
- the bead core 4 can be omitted if the rigidity of the bead portion 11 is ensured and there is no problem in fitting with the rim 20.
- a material that is softer than a resin material constituting the tire case 1 is used for a part of the bead portion 11 that contacts the rim 20, at least a portion that contacts the rim flange 22 of the rim 20, for the purpose of air seal and rim displacement prevention.
- an annular seal member 5 made of rubber having elasticity and excellent sealing properties (airtightness) is disposed.
- This seal member 5 can also be formed in a portion that contacts the bead sheet.
- the rubber forming the sealing member 5 it is preferable to use the same type of rubber as that used on the outer surface of the bead portion of a conventional general rubber pneumatic tire.
- the sealing member 5 can be omitted as long as the sealing property with the rim 20 can be ensured only by the resin material constituting the tire case 1. Further, the sealing member 5 may be made of another type of resin material that is more excellent in sealing performance than the resin material constituting the sidewall portion 12.
- the tread rubber layer 3 disposed on the outer tread surface portion of the crown portion reinforcing layer 2 is made of rubber having higher wear resistance than the resin material forming the tire case 1.
- a rubber the same type of rubber as that used in the tread rubber of a conventional rubber pneumatic tire can be used.
- a tread formed of another type of resin material that is more excellent in wear resistance than the resin material forming the tire case 1 may be used.
- a tread pattern composed of a plurality of grooves can be appropriately formed on the ground contact surface with the road surface in the same manner as a conventional rubber pneumatic tire.
- the surface composition of this brass plated steel cord was Zn-rich.
- the abundance ratio (Cu / (Cu + Zn) ⁇ 100) of copper in the total amount of copper and zinc on the surface of the steel cord of each Example and Comparative Example was adjusted to the value shown in the table below after the treatment.
- maleic anhydride-modified PP Modic P555, manufactured by Mitsui Chemicals
- unmodified PP Principal Polymer J700GP
- Example 1 The metal material was immersed in a sodium acetate buffer solution (0.1 mol / L, pH 6.4, solution temperature 25 ° C.) at an immersion time of 12 seconds to perform surface treatment.
- a sodium acetate buffer solution 0.1 mol / L, pH 6.4, solution temperature 25 ° C.
- a sodium acetate buffer solution 0.1 mol / L, pH 6.4, solution temperature 25 ° C.
- a sodium acetate buffer solution 0.1 mol / L, pH 6.4, solution temperature 25 ° C.
- a sodium acetate buffer solution 0.1 mol / L, pH 6.2, liquid temperature 25 ° C.
- PP was surface-treated in the same manner as in Example 3 instead of maleic anhydride-modified PP.
- a sodium acetate buffer solution 0.1 mol / L, pH 7.2, liquid temperature 25 ° C.
- a sodium acetate buffer solution 0.1 mol / L, pH 5.0, solution temperature 25 ° C.
- Example 7 The metal material was surface-treated in the same manner as in Example 6 according to the conditions in the table below.
- a sodium acetate buffer solution 0.1 mol / L, pH 6.0, liquid temperature 25 ° C.
- a sodium acetate buffer solution 0.1 mol / L, pH 4.9, liquid temperature 25 ° C.
- ⁇ Adhesion durability evaluation method> The evaluation sample was placed in a thermostat having a relative humidity of 90% and a temperature of 70 ° C., taken out after two weeks, and the pulling force was measured again. From the obtained pulling force, the retention ratio with respect to the pulling force before durability evaluation was calculated and used as an index of adhesion durability. The results are shown in the following table as index values with the retention rate of Example 1 as 100.
- the resin is used without performing the surface treatment.
- the composite material of Comparative Example 1 obtained by coating with the material it was confirmed that the pulling force was greatly improved.
- the heterocyclic compound was used in the same combination of the metal material and the resin material. It was confirmed that the pulling force was synergistically improved as compared with the composite material of Example 1 in which the treatment used was not performed.
- Comparative Example 2 using a buffer solution having a low pH, although the pulling force was improved, the adhesion durability was greatly reduced as compared with Comparative Example 1 in which the surface treatment was not performed.
- Comparative Example 3 using a buffer solution having a high pH, both the pulling force and the adhesion durability were lower than those in Comparative Example 1 in which the surface treatment was not performed.
- Comparative Example 4 in which only the treatment with the heterocyclic compound was performed without treatment with the buffer solution was better than Comparative Examples 1 to 3 as a comprehensive evaluation, but the pulling force was insufficient.
- Comparative Example 5 the resin material did not have a polar group, so that the pulling force was greatly deteriorated.
- Comparative Example 6 since the existing ratio of copper is too small, both the pulling force and the adhesion durability are deteriorated. In Comparative Example 7, since the existing ratio of copper is too large, the adhesion durability is deteriorated. Sexually deteriorated. Furthermore, in Comparative Example 8 using a buffer solution having a low pH, although the pulling force was improved, the adhesion durability was greatly reduced. Furthermore, in Comparative Example 9 using a buffer solution having a high pH, both the pulling force and the adhesion durability were lowered, and even when a heterocyclic compound was used, the pulling force was not improved.
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Abstract
Description
前記樹脂材料が極性基を有する熱可塑性樹脂を主成分とし、前記金属材料の表面が、pH5以上pH7.2以下の緩衝液により処理されてなり、かつ、該金属材料の表面における、銅および亜鉛の総量に占める銅の存在比率(Cu/(Cu+Zn)×100)が、55~95質量%であることを特徴とするものである。
前記補強部材が、上記本発明の樹脂-金属複合材料よりなることを特徴とするものである。
本発明の樹脂-金属複合材料は、金属材料と、その表面の少なくとも一部を被覆する樹脂材料とを含むものである。本発明においては、樹脂材料として、極性基を有する熱可塑性樹脂を主成分とするものを用いるとともに、金属材料として、その表面が、pH5以上pH7.2以下の緩衝液により処理されてなるものを用いる点が重要である。
金属材料としては、ブラスめっきされたスチールコード(線径1.1mm,めっき比率(バルク)Cu:Zn=63:37)を用いた。このブラスめっきスチールコードの表面組成は、Znリッチであった。各実施例および比較例のスチールコードの表面における、銅および亜鉛の総量に占める銅の存在比率(Cu/(Cu+Zn)×100)は、処理後においてそれぞれ下記表中に示す値となるよう調整した。樹脂材料としては、無水マレイン酸変性PP(モディック P555,三井化学(株)製)および無変性PP(プライムポリマー社製 J700GP)を用いた。
金属材料を、酢酸ナトリウム緩衝液(0.1mol/L,pH6.4,液温25℃)中に、浸漬時間12秒にて浸漬して、表面処理を行った。
金属材料を、酢酸ナトリウム緩衝液(0.1mol/L,pH6.4,液温25℃)中に、浸漬時間12秒にて浸漬して、表面処理を行った。その後、表面処理された金属材料を、1,2,3-トリアゾール水溶液(2g/L,pH=6.0,液温25℃)中に、浸漬時間6秒にて浸漬して、表面処理を行った。
金属材料を、酢酸ナトリウム緩衝液(0.1mol/L,pH6.4,液温25℃)中に、浸漬時間12秒にて浸漬して、表面処理を行った。その後、表面処理された金属材料を、4-アミノ-1,2,4-トリアゾール水溶液(2g/L,pH=6.2,液温25℃)中に、浸漬時間6秒にて浸漬して、表面処理を行った。
金属材料を、酢酸ナトリウム緩衝液(0.1mol/L,pH6.2,液温25℃)中に、浸漬時間12秒にて浸漬して、表面処理を行った。その後、表面処理された金属材料を、1,2,4-トリアゾール水溶液(2g/L,pH=6.0,液温25℃)中に、浸漬時間6秒にて浸漬して、表面処理を行った。
金属材料に、表面処理を施さなかった。
金属材料を、酢酸ナトリウム緩衝液(0.1mol/L,pH4.9,液温25℃)中に、浸漬時間12秒にて浸漬して、表面処理を行った。
金属材料を、酢酸ナトリウム緩衝液(0.1mol/L,pH7.3,液温25℃)中に、浸漬時間12秒にて浸漬して、表面処理を行った。
金属材料を、4-アミノ-1,2,4-トリアゾール水溶液(2g/L,pH=6.2,液温25℃)中に、浸漬時間6秒にて浸漬して、表面処理を行った。
金属材料として、無水マレイン酸変性PPに代えてPPを、実施例3と同様に表面処理した。
金属材料を、酢酸ナトリウム緩衝液(0.1mol/L,pH7.2,液温25℃)中に、浸漬時間12秒にて浸漬して、表面処理を行った。その後、表面処理された金属材料を、4-アミノ-1,2,4-トリアゾール水溶液(2g/L,pH=6.2,液温25℃)中に、浸漬時間6秒にて浸漬して、表面処理を行った。
金属材料を、酢酸ナトリウム緩衝液(0.1mol/L,pH5.0,液温25℃)中に、浸漬時間12秒にて浸漬して、表面処理を行った。その後、表面処理された金属材料を、4-アミノ-1,2,4-トリアゾール水溶液(2g/L,pH=6.2,液温25℃)中に、浸漬時間6秒にて浸漬して、表面処理を行った。
金属材料を、下記表中の条件に従い、それぞれ実施例5,6と同様に表面処理した。
金属材料を、下記表中の条件に従い、実施例6と同様に表面処理した。
金属材料を、酢酸ナトリウム緩衝液(0.1mol/L,pH6.8,液温25℃)中に、浸漬時間12秒にて浸漬して、表面処理を行った。その後、表面処理された金属材料を、4-アミノ-1,2,4-トリアゾール水溶液(2g/L,pH=6.2,液温25℃)中に、浸漬時間6秒にて浸漬して、表面処理を行った。
金属材料を、酢酸ナトリウム緩衝液(0.1mol/L,pH6.0,液温25℃)中に、浸漬時間12秒にて浸漬して、表面処理を行った。その後、表面処理された金属材料を、4-アミノ-1,2,4-トリアゾール水溶液(2g/L,pH =6.2,液温25℃)中に、浸漬時間6秒にて浸漬して、表面処理を行った。
金属材料を、酢酸ナトリウム緩衝液(0.1mol/L,pH4.9,液温25℃)中に、浸漬時間12秒にて浸漬して、表面処理を行った。その後、表面処理された金属材料を、4-アミノ-1,2,4-トリアゾール水溶液(2g/L,pH=6.2,液温25℃)中に、浸漬時間6秒にて浸漬して、表面処理を行った。
金属材料を、下記表中の条件に従い、比較例3と同様に表面処理した。
各実施例および比較例で準備した金属材料としてのスチールコードを、ろうそく型のモールド内に保持した状態で、樹脂材料としての無水マレイン酸変性PPを用いてインサート成型を行い、スチールコードを棒状の樹脂成形体の中心に接着させて、評価サンプルを作製した。得られた評価サンプルの断面は直径10mmの円状であり、樹脂材料と金属材料との接着長さは20mmとした。比較例5については、樹脂材料としてPPを用いて評価サンプルを作製した。
上記評価サンプルからスチールコードを引抜いて、接着力の強さを測定した。引抜速度は10mm/min、測定温度は25℃であった。その結果を、下記の表中に、引抜力の値、および、実施例1の引抜力を100とした指数値にて示す。
上記評価サンプルを、相対湿度90%、温度70℃の恒温槽内に入れ、2週間経過後に取り出して、引抜力を再度測定した。得られた引抜力から、耐久評価前の引抜力に対する保持率を計算して、接着耐久性の指標とした。その結果を、下記の表中に、実施例1の保持率を100とした指数値にて示す。
1A タイヤ半体
2 クラウン部補強層
3 トレッドゴム層
4 ビードコア
5 シール部材
10 タイヤ
11 ビード部
12 サイドウォール部
13 クラウン部
20 リム
21 ビードシート部
22 リムフランジ
Claims (6)
- 金属材料と、該金属材料の表面の少なくとも一部を被覆する樹脂材料とを含む樹脂-金属複合材料であって、
前記樹脂材料が極性基を有する熱可塑性樹脂を主成分とし、前記金属材料の表面が、pH5以上pH7.2以下の緩衝液により処理されてなり、かつ、該金属材料の表面における、銅および亜鉛の総量に占める銅の存在比率(Cu/(Cu+Zn)×100)が、55~95質量%であることを特徴とする樹脂-金属複合材料。 - 前記極性基を有する熱可塑性樹脂が、マレイン酸変性ポリオレフィンである請求項1記載の樹脂-金属複合材料。
- 前記緩衝液により処理された金属材料の表面が、さらに、異原子を2個以上有する複素環式化合物の水溶液により処理されてなる請求項1記載の樹脂-金属複合材料。
- 前記複素環式化合物がトリアゾール類である請求項3記載の樹脂-金属複合材料。
- 前記複素環式化合物がアミノ基を有するトリアゾールである請求項4記載の樹脂-金属複合材料。
- 樹脂材料で形成された環状のタイヤ骨格体と、該タイヤ骨格体の外周に巻回された補強部材からなる補強層と、を備え、
前記補強部材が、請求項1記載の樹脂-金属複合材料よりなることを特徴とするタイヤ。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/302,321 US20170021670A1 (en) | 2014-04-11 | 2015-04-10 | Resin-metal composite material and tire using same |
| EP15777055.3A EP3130693B1 (en) | 2014-04-11 | 2015-04-10 | Resin-metal composite material and tire using same |
| CN201580019351.XA CN106164339B (zh) | 2014-04-11 | 2015-04-10 | 树脂-金属复合材料和使用其的轮胎 |
| JP2016512800A JP6473443B2 (ja) | 2014-04-11 | 2015-04-10 | 樹脂−金属複合材料およびそれを用いたタイヤ |
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| EP (1) | EP3130693B1 (ja) |
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| WO (1) | WO2015156406A1 (ja) |
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| JP2017109613A (ja) * | 2015-12-16 | 2017-06-22 | 株式会社ブリヂストン | タイヤ |
| EP3388258A4 (en) * | 2015-12-07 | 2019-01-09 | Bridgestone Corporation | TIRE |
| JP2019001357A (ja) * | 2017-06-16 | 2019-01-10 | 株式会社ブリヂストン | タイヤ用樹脂金属複合部材、及びタイヤ |
| JP2019069673A (ja) * | 2017-10-06 | 2019-05-09 | 株式会社ブリヂストン | タイヤ用ビード部材、及びタイヤ |
| JP2019069674A (ja) * | 2017-10-06 | 2019-05-09 | 株式会社ブリヂストン | タイヤ用ビード部材、及びタイヤ |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20170210183A1 (en) * | 2014-07-30 | 2017-07-27 | Bridgestone Corporation | Tire |
| EP3640049B1 (en) * | 2017-06-16 | 2022-02-23 | Bridgestone Corporation | Resin-metal composite member for tire, and tire |
| KR102463818B1 (ko) * | 2022-02-18 | 2022-11-04 | 최영근 | 무 공기압 타이어의 제조방법 |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3130693A1 (en) | 2017-02-15 |
| JP6473443B2 (ja) | 2019-02-20 |
| US20170021670A1 (en) | 2017-01-26 |
| EP3130693A4 (en) | 2017-04-26 |
| EP3130693B1 (en) | 2018-07-25 |
| JPWO2015156406A1 (ja) | 2017-04-13 |
| CN106164339B (zh) | 2019-05-07 |
| CN106164339A (zh) | 2016-11-23 |
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