WO2018199122A1 - エラストマー補強用コード - Google Patents
エラストマー補強用コード Download PDFInfo
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- WO2018199122A1 WO2018199122A1 PCT/JP2018/016691 JP2018016691W WO2018199122A1 WO 2018199122 A1 WO2018199122 A1 WO 2018199122A1 JP 2018016691 W JP2018016691 W JP 2018016691W WO 2018199122 A1 WO2018199122 A1 WO 2018199122A1
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- Prior art keywords
- cord
- reinforcing
- elastomer
- filaments
- resin
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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
- D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
- D07B1/165—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber inlay
- D07B1/167—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber inlay having a predetermined shape
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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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- 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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- 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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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/005—Composite ropes, i.e. ropes built-up from fibrous or filamentary material and metal wires
-
- 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
- D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
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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
- D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
- D07B1/0633—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration having a multiple-layer configuration
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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
- B60C2009/0021—Coating rubbers for steel 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C2009/0071—Reinforcements or ply arrangement of pneumatic tyres characterised by special physical properties of the reinforcements
- B60C2009/0085—Tensile strength
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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
- B60C2009/0071—Reinforcements or ply arrangement of pneumatic tyres characterised by special physical properties of the reinforcements
- B60C2009/0092—Twist structure
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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
- D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
- D07B1/0626—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration the reinforcing cords consisting of three core wires or filaments and at least one layer of outer wires or filaments, i.e. a 3+N configuration
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2024—Strands twisted
- D07B2201/2029—Open winding
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2046—Strands comprising fillers
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2071—Spacers
- D07B2201/2073—Spacers in circumferencial direction
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2207/00—Rope or cable making machines
- D07B2207/20—Type of machine
- D07B2207/209—Tubular strander
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2207/00—Rope or cable making machines
- D07B2207/40—Machine components
- D07B2207/404—Heat treating devices; Corresponding methods
- D07B2207/4059—Heat treating devices; Corresponding methods to soften the filler material
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/202—Environmental resistance
- D07B2401/2025—Environmental resistance avoiding corrosion
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/202—Environmental resistance
- D07B2401/204—Moisture handling
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2046—Tyre cords
Definitions
- the present invention relates to an elastomer reinforcing cord (hereinafter, also simply referred to as “cord”), and relates to an elastomer reinforcing cord excellent in adhesiveness with an elastomer.
- Patent Document 1 proposes a composite cord in which a sheath wire made of 2 to 12 steel filaments is twisted around a core made of a resin filament having a melting point of 50 ° C. or higher and lower than 200 ° C. ing. In this composite cord, resin filaments are melted during vulcanization, and rubber is infiltrated between the steel filaments to prevent rusting of the steel filaments.
- an object of the present invention is to provide an elastomer reinforcing cord excellent in adhesiveness with an elastomer such as rubber.
- the present inventors obtained the following knowledge as a result of intensive studies to solve the above problems.
- the amount of amorphous polymer material used is excessive relative to the void area in the cross section of the metal cord, the polymer material inside leaks to the outside during vulcanization and inhibits adhesion to rubber. In the tensile test, some resin was exposed.
- the present inventors have further intensively studied. As a result, the inventors have found that the above-described problems can be solved by adopting the following configuration, and have completed the present invention.
- the elastomer reinforcing cord of the present invention is an elastomer reinforcing cord in which a metal filament and a resin filament made of a polymer material having a melting point or softening point of 80 to 160 ° C. are twisted together.
- the distance between the metal filaments constituting the outermost sheath layer is 100 ⁇ m or less, and in the cross section in the direction perpendicular to the axial direction, Of the region surrounded by connecting the centers of the metal filaments constituting the outer sheath layer, when the region occupied by other than the metal filament is a gap region, the area of the polymer material derived from the resin filament with respect to the gap region
- the filling rate as a ratio is 52 to 120%.
- fusing point means the melting peak temperature in the heat flux differential scanning calorimetry described in JISK7121.
- a softening point means the value measured using the softening point test method described in JISK7206 (1999).
- the cord of the present invention it is preferable that 60 to 120% of the gap region is occupied by the polymer material derived from the resin filament.
- the cord of the present invention in the axial direction of the elastomer reinforcing cord, when the cross section in the direction orthogonal to the axial direction is observed at intervals of 2 mm in a range twice the twist pitch of the outermost sheath layer, It is preferable that three or more gaps of the matching observation surfaces do not communicate in the axial direction.
- the distance between the metal filaments constituting the outermost sheath layer is preferably 20 ⁇ m or less.
- the polymer material preferably contains maleic acid-modified polyethylene or an ionomer.
- the resin filament preferably has a wire diameter of 0.1 mm or more.
- the melt flow rate defined by JIS K 7120 of the polymer material is 7.0 g / min. The above is preferable.
- the polymer material preferably has a melting point or softening point of 130 to 160 ° C.
- the core is preferably formed by twisting three metal filaments.
- FIG. 3 is a cross-sectional view in a direction orthogonal to an axial direction of an elastomer reinforcing cord of Comparative Example 1 before vulcanization.
- FIG. 6 is a cross-sectional view in a direction orthogonal to an axial direction of an elastomer reinforcing cord of Comparative Example 2 before vulcanization.
- FIG. FIG. 6 is a cross-sectional view in a direction orthogonal to an axial direction of an elastomer reinforcing cord of Comparative Example 2 before vulcanization.
- FIG. 6 is a cross-sectional view in a direction perpendicular to the axial direction of the elastomer reinforcing cord of Example 1 before vulcanization.
- FIG. 6 is a cross-sectional view in a direction orthogonal to the axial direction before vulcanization of an elastomer reinforcing cord of Example 2.
- 6 is a cross-sectional view in a direction orthogonal to an axial direction before vulcanization of an elastomer reinforcing cord of Example 3.
- FIG. 6 is a cross-sectional view in a direction orthogonal to the axial direction of an elastomer reinforcing cord of Example 4 before vulcanization.
- FIG. 9 is a cross-sectional view in a direction orthogonal to the axial direction of the elastomer reinforcing cord of Example 5 before vulcanization. It is a graph showing the relationship between a filling rate, a rust progress length, and a space
- FIG. 1 is a cross-sectional view in a direction orthogonal to the axial direction before vulcanization of an elastomer reinforcing cord according to a preferred embodiment of the present invention.
- the cord 10 of the present invention has a core and at least one sheath layer.
- the core is formed by twisting three metal filaments 1a, and the core.
- the filament 2b is twisted together, the structure of the cord of the present invention is not limited to this.
- FIG. 2 is a cross-sectional view in a direction orthogonal to the axial direction after vulcanization of an elastomer reinforcing cord according to a preferred embodiment of the present invention.
- the distance w between the metal filaments 1b constituting the outermost sheath layer is 100 ⁇ m or less.
- the distance w between the metal filaments 1b which comprise an outermost layer sheath layer is 20 micrometers or less.
- the filling ratio is 52 to 120%. If the ratio of the polymer material 3 in the gap region is less than 52%, the gap inside the cord 10 cannot be sufficiently filled, and the occurrence of rust on the metal filaments 1a and 1b cannot be effectively prevented.
- the ratio of the polymer material 3 in the gap region exceeds 120%, the polymer material 3 flowing out from the outermost sheath layer increases, and the adhesion between the elastomer and the cord 10 is hindered.
- the filling rate is preferably 60 to 120%, and 50% or more of the surface area of the metal filament 1b constituting the outermost sheath layer is preferably in contact with the elastomer.
- the cord 10 of the present invention when the cross-section in the direction orthogonal to the axial direction is observed at intervals of 2 mm in the cord axial direction in a range that is twice the twist pitch of the outermost sheath layer, there is a gap between adjacent observation surfaces. It is preferable that three or more places do not communicate in the axial direction. That is, in the gap region, it is preferable that the gap is not communicated by 6 mm or more in the cord axis direction. If the air gap communicates in the gap area, this becomes a water passage, which causes the rust of the metal filaments 1a and 1b to progress. However, in such a state, a sealing system is formed in the gap region, and the progress of rust in the axial direction can be effectively prevented.
- the polymer material constituting the resin filaments 2a and 2b is not particularly limited as long as it has a melting point or softening point of 80 to 160 ° C, preferably 130 to 160 ° C.
- the polymer material for example, an ionomer or an acid-modified resin can be used, and these may be used in combination.
- the acid-modified resins modified resins with acid anhydrides such as dimer acid, maleic acid, and itaconic acid are preferable.
- the maleic acid-modified resin can improve the adhesion to the metal filaments 1a and 1b.
- maleic acid-modified resins include maleic anhydride-modified styrene-ethylene-butadiene-styrene block copolymer (SEBS), maleic acid-modified polyethylene, maleic anhydride-modified ultra-low density polyethylene, maleic anhydride-modified ethylene-butene- 1 copolymer, maleic anhydride modified ethylene-propylene copolymer, maleic anhydride modified ethylene-octene, maleic anhydride modified propylene, and the like.
- SEBS maleic anhydride-modified styrene-ethylene-butadiene-styrene block copolymer
- maleic acid-modified polyethylene maleic anhydride-modified ultra-low density polyethylene
- maleic anhydride-modified ethylene-butene- 1 copolymer maleic anhydride modified ethylene-propylene copolymer
- maleic anhydride modified ethylene-octene maleic anhydride modified
- the resin filaments 2a and 2b preferably contain an ionomer.
- the ionomer can smooth the surfaces of the resin filaments 2a and 2b, improve the spinnability, and can improve the sliding of the resin filaments 2a and 2b in the stranding machine.
- ionomers include high-milan 1554, high-milan 1557, high-milan 1650, high-milan 1652, high-milan 1702, high-milan 1706, and high-milan 1855 made by Mitsui DuPont Polychemical Co., Ltd.
- sodium ion neutralized ionomers such as High Milan 1555, High Milan 1601, High Milan 1605, High Milan 1707, High Milan 1856, AM7331 and the like.
- lithium ion neutralized ionomers such as Surin 7930 manufactured by DuPont, and sodium ion neutralized ionomers such as Surlyn 8120 can be used. These may be used alone or in combination of two or more.
- polymer material of the resin filaments 2a and 2b according to the cord 10 of the present invention include Tuftec manufactured by Asahi Kasei Corporation, for example, M1943, M1911, and M1913.
- Mitsui Chemicals, Inc. Admer, for example, LB548, NF518, QF551, QF500, QE060, high wax, for example, 4051E, 4252E, 1105A, Tuffmer, for example, MH7010, MH7020, Mitsui DuPont Polychemical Co., Ltd.
- the resin filaments 2a and 2b preferably have a wire diameter of 0.1 mm or more.
- the wire diameters of the resin filaments 2a and 2b are less than 0.1 mm, there is a risk of disconnection during twisting with the metal filaments 1a and 1b, and it is difficult to produce a cord having a target structure.
- the upper limit of the wire diameters of the resin filaments 2a and 2b is not particularly limited, and can be appropriately set so that the ratio of the polymer material in the gap region after vulcanization is 52 to 120%.
- the melt flow rate (MFR) defined by JIS K 7120 of the polymer material constituting the resin filaments 2a and 2b is 7.0 g / min.
- MFR is 7.0 g / min. If it is less than 1, even if the resin filaments 2a and 2b are melted during vulcanization, the fluidity of the polymer material 3 in the gap region inside the cord cannot be secured, and the effects of the present invention may not be sufficiently obtained. is there.
- the resin filaments 2a and 2b may contain an inorganic filler.
- the melting point is set to 80 ° C. or higher and 160 ° C. or lower.
- the strength of the resin filaments 2a and 2b is reduced. Therefore, the resin filaments 2a and 2b may be disconnected at the time of stranded wire, and productivity may be deteriorated. Therefore, in the cord 10 of the present invention, an inorganic filler may be added to the resin filaments 2a and 2b to improve the strength of the resin filaments 2a and 2b.
- the tack of the surface of the resin filaments 2a and 2b is reduced, so that the slipping property of the resin filaments 2a and 2b is further improved, and the steel cord 10 is twisted together. It becomes easy.
- the addition amount of the inorganic filler is preferably 0.1 to 30 parts by mass, more preferably 0.5 to 30 parts by mass, and further preferably 5 to 30 parts by mass with respect to 100 parts by mass of the polymer material. Particularly preferred is 10 to 20 parts by mass.
- the addition amount of the inorganic filler is less than 0.1 parts by mass with respect to 100 parts by mass of the polymer material, the reinforcing effect of the resin filaments 2a and 2b cannot be sufficiently obtained, whereas when it exceeds 30 parts by mass, The reinforcing effect of the resin filaments 2a and 2b is saturated, which is not preferable from the viewpoint of cost, and at the same time, the dispersibility of the inorganic filler is lowered, which may adversely affect the durability of the resin filaments 2a and 2b.
- examples of the inorganic filler include carbon black, silica, aluminum hydroxide, clay, alumina, talc, mica, kaolin, glass balloon, glass beads, calcium carbonate, magnesium carbonate, magnesium hydroxide, Examples include calcium carbonate, magnesium oxide, titanium oxide, potassium titanate, and barium sulfate. These may be used individually by 1 type and may use 2 or more types together. Among these, carbon black is preferable from the viewpoint of reinforcing the resin filaments 2a and 2b. Since the rubber composition constituting the tire usually contains carbon black, the compatibility between the resin filaments 2a and 2b according to the cord 10 of the present invention and the rubber composition constituting the tire is improved. Therefore, improvement in adhesion between rubber and resin can be expected.
- the grade of carbon black is not particularly limited, and an arbitrary one can be appropriately selected and used.
- SRF, GPF, FEF, HAF, ISAF, SAF, etc. are used, and particularly FEF, HAF, ISAF, SAF, etc., which are excellent in bending resistance and fracture resistance, are preferably mentioned.
- Nitrogen adsorption specific surface area N 2 SA JIS K 6217-2: 2001) is preferably 30 to 150 m 2 / g, and more preferably 35 to 130 m 2 / g.
- the resin filaments 2a and 2b according to the cord 10 of the present invention may contain a thermoplastic resin and a thermoplastic elastomer to the extent that the above effects are not hindered. Furthermore, you may contain (blend) various additives, such as anti-aging agent, oil, a plasticizer, a color former, and a weathering agent.
- the resin filaments 2a and 2b according to the cord 10 of the present invention can be manufactured by a known method, and the manufacturing method is not particularly limited.
- the resin and the inorganic filler can be kneaded and the obtained resin composition can be stretched for production.
- a master batch in which a large amount of the inorganic filler is added to the resin is manufactured in advance, and the master batch is added to the resin to obtain a resin composition having a predetermined inorganic filler content, and the resin composition is stretched.
- the wire diameter, tensile strength, and cross-sectional shape of the metal filaments 1a and 1b are not particularly limited.
- the wire diameter of the metal filaments 1a and 1b can be set to 0.10 mm to 0.60 mm. Preferably, it is 0.12 to 0.50 mm.
- the wire diameter of the metal filaments 1a and 1b is 0.10 mm or less, the gap inside the cord becomes too small, and the strength necessary for stable production of the resin filament necessary for filling cannot be ensured.
- the diameter is increased to ensure strength, there is a concern that the cord twist properties will be adversely affected.
- the wire diameter of the metal filaments 1a and 1b is 0.60 mm or more, the tensile strength of the metal filaments 1a and 1b cannot be increased, and it is disadvantageous in terms of weight reduction to obtain the required strength.
- the metal filaments 1a and 1b are generally steel, that is, a linear metal containing iron as a main component (the mass of iron exceeds 50% by mass with respect to the total mass of the metal filament). It may be composed only of iron, or may contain metals other than iron, such as zinc, copper, aluminum, and tin.
- the surfaces of the metal filaments 1a and 1b may be plated.
- the type of plating is not particularly limited, and examples thereof include zinc plating, copper plating, brass plating, and bronze plating. Among these, brass plating is preferable. This is because the metal filament having brass plating has excellent adhesion to rubber.
- the ratio of copper to zinc (copper: zinc) is usually 60 to 70:30 to 40 on a mass basis.
- the thickness of the plating layer is generally 100 nm to 300 nm.
- the structure of the cord 10 of the present invention is not particularly limited as long as it has a core and at least one sheath layer, and after vulcanization, an n + m structure such as 1 + 6, 2 + 6, 2 + 8, 3 + 7, 3 + 8, 3 + 9, etc.
- Layered structure such as cords with n + m + 1 structures such as 3 + 9 + 15, 1 + 6 + 11, etc., and cords with so-called compact structures such as 1 + 6, 2 + 8, 3 + 9, 1 + 6 + 12, etc., and steel with a double twist structure in which these are further twisted
- a structure that provides a code is preferred.
- the cord having a structure in which the core is formed by twisting three metal filaments has a structure in which the elastomer does not easily enter the void inside the core.
- the void at the center of the core can be filled with a polymer material after vulcanization, which is preferable as the structure of the cord 10 of the present invention.
- the arrangement position of the resin filaments 2a and 2b is not particularly limited, and is appropriately set so that the ratio of the polymer material in the gap region after vulcanization is 52 to 120%. Can do.
- the inner side of the outermost layer sheath filament is preferable in the case of the steel cord having the layer twist structure, and the inner side of the outermost layer sheath strand in the case of the steel cord having the double twist structure. Further, the inner side is more preferable than the outermost sheath filament of each strand.
- the resin filament 2a is generally used when the steel cord 10 is twisted by using a twisting machine for manufacturing a steel cord for a tire. 2b can be simultaneously twisted together. Therefore, the number of work steps is not increased, and productivity is not reduced.
- a resin material having a strength as high as possible in order to prevent twisted disconnection between different materials of the steel filaments 1a and 1b and the resin filaments 2a and 2b.
- the Rockwell hardness (H scale) is 30 to 150.
- the strength of the resin filaments 2a and 2b can be increased by increasing the draw ratio during the production of the resin filaments 2a and 2b. Moreover, it is preferable that the resin filaments 2a and 2b slip in the stranded wire machine.
- the cord 10 of the present invention is excellent in adhesiveness with an elastomer such as rubber, it can be suitably used for a portion where a steel cord-rubber composite has been conventionally used.
- it can be suitably used for rubber articles such as tires, belts and hoses.
- the application site is not particularly limited and can be used as a carcass ply reinforcement or a belt reinforcement. In this case, it may be used only for local reinforcement of a part of the tread.
- the vicinity of the tread end the vicinity of the equator, the vicinity of the groove bottom, another inclined belt layer or the circumferential cord layer, it can be used only for local reinforcement such as the end thereof.
- the resin filament type A in the table is a resin (softening) in which Himiran 1702 (manufactured by Mitsui DuPont Polychemical Co., Ltd.) and Tuftec M1943 (manufactured by Asahi Kasei Co., Ltd.) are mixed at a ratio of 8: 2. Point: 95 ° C.), and B of the resin filament species is High Milan 1702 (melting point: 90 ° C.).
- FIG. 3 shows the cross section of the cord of Comparative Example 1
- FIG. 4 shows the cross section of the cord of Comparative Example 2
- FIG. 5 shows the cross section of the cord of Example 1
- FIG. 6 shows the cross section of the cord of Example 2
- 7 shows a cross section of the cord of the third embodiment
- FIG. 8 shows a cross section of the cord of the fourth embodiment
- FIG. 9 shows a cross section of the cord of the fifth embodiment.
- the wire diameters of the steel filaments and resin filaments 2a and 2b are as shown in Tables 1 and 2.
- Tables 1 and 2 summarize the code structure, filling rate, and rust progression length. Moreover, the graph showing the relationship between a filling rate and a rust progress length is shown in FIG.
- FIG. 10 shows that the rust progression length is improved when the filling rate exceeds 52%.
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Abstract
Description
コアと少なくとも1層のシース層とを有し、加硫後において、最外層シース層を構成する金属フィラメント間の距離が100μm以下であり、かつ、軸方向に直交する方向の断面における、前記最外層シース層を構成する各金属フィラメントの中心を結んで囲まれる領域のうち、前記金属フィラメント以外が占める領域を隙間領域としたとき、該隙間領域に対する、前記樹脂フィラメント由来の高分子材料の面積の割合である充填率が52~120%であるものである。ここで、融点とは、JIS K 7121に記載されている熱流束示差走査熱量測定における融解ピーク温度のことをいう。また、軟化点とは、JIS K 7206(1999)に記載されている軟化点試験方法を用いて測定された値をいう。
本発明のエラストマー補強用コードは、金属フィラメントと、融点または軟化点が80℃以上160℃以下である高分子材料からなる樹脂フィラメントと、が撚り合わされてなるものである。図1は、本発明の一好適な実施の形態に係るエラストマー補強用コードの加硫前における軸方向に直交する方向の断面図である。図1に示すように、本発明のコード10は、コアと少なくとも1層のシース層とを有しており、図示例においては、3本の金属フィラメント1aを撚り合わせてなるコアと、このコアの周りに撚り合わされてなる9本の金属フィラメント1bが巻き付けられてなるシース層を有しており、コアの中心に1本の樹脂フィラメント2aが配置され、さらに、コアの周りに3本の樹脂フィラメント2bが撚り合わされているが、本発明のコードの構造は、これに限られるものではない。
<実施例1~7および比較例1~3>
表1、2に示す線径のスチールフィラメントおよび同表に示す線径の樹脂フィラメントを用いて、チューブラー型撚線機にて、図3~9に示す構造のコードを作製した。得られた各コードを被覆ゴムでコーティングしてコード-ゴム複合体を作製した。ここで、同表中の樹脂フィラメント種のAは、ハイミラン1702(三井デュポンポリケミカル(株)社製)およびタフテックM1943(旭化成(株)社製)を8:2の割合で混合した樹脂(軟化点:95℃)であり、樹脂フィラメント種のBはハイミラン1702(融点:90℃)である。
2a、2b 樹脂フィラメント
3 高分子材料
10 エラストマー補強用コード(コード)
Claims (10)
- 金属フィラメントと、融点または軟化点が80℃以上160℃以下である高分子材料からなる樹脂フィラメントと、が撚り合わされてなるエラストマー補強用コードにおいて、
コアと少なくとも1層のシース層とを有し、加硫後において、最外層シース層を構成する金属フィラメント間の距離が100μm以下であり、かつ、軸方向に直交する方向の断面における、前記最外層シース層を構成する各金属フィラメントの中心を結んで囲まれる領域のうち、前記金属フィラメント以外が占める領域を隙間領域としたとき、該隙間領域に対する、前記樹脂フィラメント由来の高分子材料の面積の割合である充填率が52~120%であることを特徴とするエラストマー補強用コード。 - 前記充填率が、60~120%である請求項1記載のエラストマー補強用コード。
- 前記エラストマー補強用コードの軸方向において、最外層シース層の撚りピッチの2倍の範囲を、2mm間隔で軸方向に直交する方向の断面を観察したとき、隣り合う観察面の空隙が3ヶ所以上軸方向に連通していない請求項1または2記載のエラストマー補強用コード。
- 前記最外層シース層を構成する金属フィラメント間の距離が、20μm以下である請求項1~3のうちいずれか一項記載のエラストマー補強用コード。
- 前記高分子材料が、マレイン酸変性ポリエチレンを含む請求項1~4のうちいずれか一項記載のエラストマー補強用コード。
- 前記高分子材料が、アイオノマーを含む請求項1~5のうちいずれか一項記載のエラストマー補強用コード。
- 前記樹脂フィラメントの線径が、0.1mm以上である請求項1~6のうちいずれか一項記載のエラストマー補強用コード。
- 前記高分子材料のJIS K 7120で規定されるメルトフローレートが、7.0g/min.以上である請求項1~7のうちいずれか一項記載のエラストマー補強用コード。
- 前記高分子材料の融点または軟化点が、130℃以上160℃以下である請求項1~8のうちいずれか一項記載のエラストマー補強用コード。
- 前記コアが、3本の金属フィラメントが撚り合わされてなる請求項1~9のうちいずれか一項記載のエラストマー補強用コード。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019514553A JP7002538B2 (ja) | 2017-04-27 | 2018-04-24 | エラストマー補強用コード |
| CN201880028037.1A CN110582605B (zh) | 2017-04-27 | 2018-04-24 | 弹性体增强用帘线 |
| EP18790296.0A EP3617398B1 (en) | 2017-04-27 | 2018-04-24 | Cord for reinforcing elastomers |
| US16/663,745 US11585044B2 (en) | 2017-04-27 | 2019-10-25 | Cord for reinforcing elastomers |
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| JP2017-089005 | 2017-04-27 | ||
| JP2017089005 | 2017-04-27 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| US16/663,745 Continuation US11585044B2 (en) | 2017-04-27 | 2019-10-25 | Cord for reinforcing elastomers |
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| Publication Number | Publication Date |
|---|---|
| WO2018199122A1 true WO2018199122A1 (ja) | 2018-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2018/016691 Ceased WO2018199122A1 (ja) | 2017-04-27 | 2018-04-24 | エラストマー補強用コード |
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| Country | Link |
|---|---|
| US (1) | US11585044B2 (ja) |
| EP (1) | EP3617398B1 (ja) |
| JP (1) | JP7002538B2 (ja) |
| CN (1) | CN110582605B (ja) |
| WO (1) | WO2018199122A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019082939A1 (ja) * | 2017-10-25 | 2019-05-02 | 株式会社ブリヂストン | タイヤ |
| WO2019124559A1 (ja) * | 2017-12-22 | 2019-06-27 | 株式会社ブリヂストン | エラストマー補強用コード |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6127519B1 (ja) * | 1983-11-14 | 1986-06-25 | Sumitomo Rubber Ind | |
| JPS63111986A (ja) * | 1986-10-29 | 1988-05-17 | 株式会社 タクマ | 蒸気洗浄装置 |
| JP2001234444A (ja) | 2000-02-18 | 2001-08-31 | Sumitomo Rubber Ind Ltd | 複合コードおよびそれを用いた空気入りタイヤ |
| WO2017222046A1 (ja) * | 2016-06-24 | 2017-12-28 | 株式会社ブリヂストン | タイヤの製造方法 |
Family Cites Families (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2648524A1 (de) | 1976-10-27 | 1978-05-03 | Drahtcord Saar Gmbh & Co Kg | Drahtseil als festigkeitstraeger in gummi- oder kunststoffartikeln, insbesondere in fahrzeugluftreifen |
| JPS60231884A (ja) * | 1984-04-28 | 1985-11-18 | 興国鋼線索株式会社 | スチ−ルコ−ド |
| NL8601599A (nl) | 1986-06-19 | 1988-01-18 | Bekaert Sa Nv | Streng voor toepassing als wapening in voorwerpen uit polymeermateriaal alsmede een of meer dergelijke omvattende voorwerpen uit polymeermateriaal. |
| JPH0640626Y2 (ja) | 1987-12-21 | 1994-10-26 | 金井 宏之 | スチールコード |
| JPH0233298U (ja) | 1988-08-25 | 1990-03-01 | ||
| US5139874A (en) | 1991-09-05 | 1992-08-18 | The Goodyear Tire & Rubber Company | Cable for reinforcing rubber articles |
| DE4125887A1 (de) * | 1991-08-05 | 1993-02-11 | Uniroyal Englebert Gmbh | Metallcord |
| JP3385555B2 (ja) * | 1992-10-09 | 2003-03-10 | ブリヂストンメタルファ株式会社 | 補強用スチ−ルコ−ド及びゴムとの複合体並びにその製法 |
| DE19535597A1 (de) * | 1995-09-25 | 1997-03-27 | Drahtcord Saar Gmbh & Co Kg | Drahtseil zur Verstärkung von Gummiartikeln |
| US5843583A (en) * | 1996-02-15 | 1998-12-01 | N.V. Bekaert S.A. | Cord with high non-structural elongation |
| EP1033435A1 (en) | 1999-03-04 | 2000-09-06 | N.V. Bekaert S.A. | Steel cord with polymer core |
| JP4315561B2 (ja) | 2000-02-01 | 2009-08-19 | 住友ゴム工業株式会社 | 複合コードを用いた空気入りタイヤ |
| US20020053386A1 (en) | 2000-09-11 | 2002-05-09 | The Yokohama Rubber Co., Ltd. | Steel cord for tire and radial tire |
| US6658836B2 (en) * | 2001-03-14 | 2003-12-09 | The Goodyear Tire & Rubber Company | Hybrid cord |
| DE10144833A1 (de) * | 2001-09-12 | 2003-04-30 | Continental Ag | Verstärkungskord |
| ATE393853T1 (de) * | 2003-07-17 | 2008-05-15 | Bekaert Sa Nv | Offenes lagiges stahlseil mit hoher bruchkraft |
| JP4504113B2 (ja) | 2004-06-23 | 2010-07-14 | 東京製綱株式会社 | 被覆ワイヤロープ |
| JP5015850B2 (ja) * | 2007-05-17 | 2012-08-29 | 株式会社ブリヂストン | コードおよびその製造方法並びに、コード製造設備 |
| JP2008297667A (ja) * | 2007-05-31 | 2008-12-11 | Yokohama Rubber Co Ltd:The | スチールコード及びその製造方法と空気入りタイヤ |
| FR2934614B1 (fr) * | 2008-08-01 | 2010-09-10 | Michelin Soc Tech | Cable a couches gomme in situ pour armature carcasse de pneumatique. |
| BRPI0923575B1 (pt) * | 2008-12-22 | 2019-11-12 | Bridgestone Corp | cordonel de aço para reforçar artigos de borracha e pneumático usando o mesmo |
| JP5513002B2 (ja) | 2009-04-20 | 2014-06-04 | 株式会社ブリヂストン | ゴム−スチールコード複合体および空気入りラジアルタイヤ |
| FR2962453B1 (fr) * | 2010-05-20 | 2012-09-21 | Michelin Soc Tech | Cable metallique a trois couches, gomme in situ par un elastomere thermoplastique insature |
| JP5746416B2 (ja) | 2011-03-21 | 2015-07-08 | オーチス エレベータ カンパニーOtis Elevator Company | エレベータの引張部材 |
| FR2996230B1 (fr) | 2012-09-28 | 2014-10-31 | Michelin & Cie | Cable gomme in situ comprenant une composition comprenant un polysulfure organique. |
| JP6343872B2 (ja) * | 2013-04-11 | 2018-06-20 | 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 |
| EP2990220B1 (en) | 2013-04-25 | 2017-08-23 | Bridgestone Corporation | Tire comprising a tire frame and a reinforcing metal cord member |
| JP6869108B2 (ja) | 2016-06-24 | 2021-05-12 | 株式会社ブリヂストン | タイヤの製造方法 |
| JP6785152B2 (ja) * | 2016-12-27 | 2020-11-18 | 株式会社ブリヂストン | スチールコードの製造方法 |
| CN111527258A (zh) * | 2017-12-22 | 2020-08-11 | 株式会社普利司通 | 弹性体增强帘线 |
-
2018
- 2018-04-24 WO PCT/JP2018/016691 patent/WO2018199122A1/ja not_active Ceased
- 2018-04-24 CN CN201880028037.1A patent/CN110582605B/zh active Active
- 2018-04-24 EP EP18790296.0A patent/EP3617398B1/en active Active
- 2018-04-24 JP JP2019514553A patent/JP7002538B2/ja active Active
-
2019
- 2019-10-25 US US16/663,745 patent/US11585044B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6127519B1 (ja) * | 1983-11-14 | 1986-06-25 | Sumitomo Rubber Ind | |
| JPS63111986A (ja) * | 1986-10-29 | 1988-05-17 | 株式会社 タクマ | 蒸気洗浄装置 |
| JP2001234444A (ja) | 2000-02-18 | 2001-08-31 | Sumitomo Rubber Ind Ltd | 複合コードおよびそれを用いた空気入りタイヤ |
| WO2017222046A1 (ja) * | 2016-06-24 | 2017-12-28 | 株式会社ブリヂストン | タイヤの製造方法 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3617398A4 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019082939A1 (ja) * | 2017-10-25 | 2019-05-02 | 株式会社ブリヂストン | タイヤ |
| JPWO2019082939A1 (ja) * | 2017-10-25 | 2020-12-17 | 株式会社ブリヂストン | タイヤ |
| JP7128834B2 (ja) | 2017-10-25 | 2022-08-31 | 株式会社ブリヂストン | タイヤ |
| US11760129B2 (en) | 2017-10-25 | 2023-09-19 | Bridgestone Corporation | Tire |
| WO2019124559A1 (ja) * | 2017-12-22 | 2019-06-27 | 株式会社ブリヂストン | エラストマー補強用コード |
| JPWO2019124559A1 (ja) * | 2017-12-22 | 2020-12-10 | 株式会社ブリヂストン | エラストマー補強用コード |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3617398B1 (en) | 2025-06-25 |
| EP3617398A1 (en) | 2020-03-04 |
| JP7002538B2 (ja) | 2022-01-20 |
| JPWO2018199122A1 (ja) | 2020-03-12 |
| CN110582605B (zh) | 2022-07-01 |
| EP3617398A4 (en) | 2021-02-17 |
| CN110582605A (zh) | 2019-12-17 |
| US11585044B2 (en) | 2023-02-21 |
| US20200055340A1 (en) | 2020-02-20 |
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