US20020096238A1 - Metal cord for reinforcing rubber article - Google Patents
Metal cord for reinforcing rubber article Download PDFInfo
- Publication number
- US20020096238A1 US20020096238A1 US09/989,426 US98942601A US2002096238A1 US 20020096238 A1 US20020096238 A1 US 20020096238A1 US 98942601 A US98942601 A US 98942601A US 2002096238 A1 US2002096238 A1 US 2002096238A1
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- United States
- Prior art keywords
- filament
- cord
- core
- sheath
- waved
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- 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
- D07B1/0646—Reinforcing cords for rubber or plastic articles comprising longitudinally preformed wires
- D07B1/0653—Reinforcing cords for rubber or plastic articles comprising longitudinally preformed wires in the core
-
- 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
-
- 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
- B60C9/0057—Reinforcements comprising preshaped elements, e.g. undulated or zig-zag filaments
-
- 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
- D07B2201/2023—Strands with core
-
- 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
-
- 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
- D07B2201/2038—Strands characterised by the number of wires or filaments
- D07B2201/2039—Strands characterised by the number of wires or filaments three to eight wires or filaments respectively forming a single layer
-
- 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—Tire cords
Definitions
- the present invention relates to a metal cord used as a reinforcing member for a rubber article such as a pneumatic tire or the like, and particularly relates to a metal cord for reinforcing a rubber article which is structured such that a rubber easily intrudes into an inner portion of the rubber so as to improve a corrosion resistance as well as to improve a fatigue resistance.
- a metal cord supplied to the pneumatic tire widely employs a layer structure in which normally filaments having the same wire diameter are closest arranged in order to increase a cord tensional strength per a cord diameter and obtain an improved fatigue resistance.
- a closest layer structure mentioned above since a gap between the filaments within a sheath is small, the rubber is not sufficiently intruded into the inner portion of the cord but a cavity is easily generated, so that a moisture easily intrude within the cavity so as to corrode the cord.
- an object of the present invention is to provide a metal cord for reinforcing a rubber article which on the basis of forming a core by one waved filament modeled in two-dimensional as well as twisting the waved filament with a sheath while applying the torsion, can make the waved filament in a three-dimensional wave shape within a cord, thereby increasing an apparent diameter of the core, sufficiently securing a gap between the filaments of the sheath and increasing a degree of intrusion of the rubber.
- a metal cord in a layer structure for reinforcing a rubber article including:
- said filament of the core is formed of a waved filament waved in a two-dimensional wave shape having crest portions and trough portions in a repeated manner, in a state before being bundled, and is twisted with said sheath while applying the torsion so as to be formed in a three-dimensional wave shape within a cord.
- a diameter d of the filament of the core is between 0.15 and 0.50 mm and substantially the same as that of the filament of the sheath.
- FIG. 1 is a cross sectional view of a metal cord in accordance with an embodiment of the present invention
- FIG. 2 is a schematic side elevational view of the metal cord
- FIG. 3 is a side elevational view showing a waved shape of a filament of a core in a state before bundling
- FIGS. 4A and 4B are cross sectional views showing another embodiment of a metal cord in accordance with the present invention.
- FIGS. 5A and 5B are cross sectional views showing a metal cord in accordance with a comparative embodiment used in a test in Table 1.
- FIG. 1 is a cross sectional view showing an example of a metal cord for reinforcing a rubber article in accordance with the present invention
- FIG. 2 is a schematic side elevational view of the metal cord
- FIG. 3 is a side elevational view showing a waved state of a filament of a core.
- a metal core 1 for reinforcing a rubber article (hereinafter, refer to a metal cord 1 ) has a layer structure obtained by bundling a core 2 formed of one filament Fa and of 1 to 6 filaments Fb arranged around the core 2 .
- a 1+6 structure in which a number of the filaments Fb of the sheath 3 is set as 6 .
- a waved filament 5 modeled in a two-dimensional wave shape in which crest portions Y 1 and trough portions Y 2 are repeated in a state before being bundled is used.
- the waved filament 5 is formed in a zigzag shape in which a straight portion Y 3 is interposed between the crest portion Y 1 and the trough portion Y 2 , however, may be formed in a sine curve shape or the like which is formed only of curves.
- the two-dimensional waving mentioned above is easily processed in comparison with the three-dimensional waving, for example, a spiral shape or the like, and has an advantage that a dimensional accuracy is high and stable as well as it is easy to treat.
- a non-waved filament 6 formed in a substantially linear shape in a state before being bundled is used as the filament Fb of the seethe 3 .
- the metal cord 1 is formed by twisting the waved filament 5 with the sheath 3 while applying torsion.
- six non-waved filament 6 are spirally wound around the core 2 formed in the three-dimensional wave shape by applying the torsion to the waved filament 5 .
- the two-dimensional waved filament 5 is formed in the three-dimensional wave shape due to the torsion thereof. Accordingly, the apparent diameter of the core 2 is further increased in comparison with the case having no torsion, whereby it is possible to stably secure a sufficient gap between the filaments Fb of the sheath 3 surrounding around the core and it is possible to widely improve a degree of intrusion of the rubber (rubber permeability). Further, since a fretting (a phenomenon that an abrasion is generated by a relative repeated fine slip between the filaments) can be restricted by securing the gap, a fatigue resistance can be further improved.
- the metal cord 1 is made in the layer structure, because it is possible to increase the number of the filaments with respect to the cord diameter at a time of constituting the cord, so that it is possible to increase a cord strength, it is possible to increase an effect of reinforcing the rubber article and it is possible to narrow the filament at that degree so as to improve a bending fatigue property.
- the number of the filament Fa used in the core 2 is required to be set to one in view of a corrosion resistance. Further, the number of the filaments Fb used in the sheath 3 is between 1 and 6, and when it is over six, the waved size in the filament Fa of the core 2 becomes too large, and is disadvantageous in strength.
- the filament Fa and the filament Fb are set to have the same diameter, whereby it is possible to commonly use a wire extending process and it is possible to economically manufacture the cord.
- the wire diameter d of the filaments Fa and Fb within a range between 0.15 and 0.50 mm.
- the wire diameter d is less than 0.15 mm, it is too narrow and becomes disadvantageous in view of the cord strength, and on the contrary, when it is over 0.50 mm, it becomes disadvantageous in view of the bending fatigue property.
- a wave pitch Pw and a wave height h of the filament Fa to a range between 3.0 and 9.0 mm and a range between 0.20 and 0.80 mm, whereby it is possible to economically wave and it is possible to secure excellent rubber permeability.
- the wave pitch Pw becomes smaller than 3.0 mm or the wave height h becomes larger than 0.80 mm, an amount of waving process is increased and a working cost is increased, and on the contrary, a damage applied to the filament Fa due to the process is increased so as to cause a reduction of strength.
- the wave pitch Pw corresponds to a distance in a longitudinal direction between the crest portions Y 1 and Y 1
- the wave height h corresponds to a distance in an amplitude direction between the crest portion Y 1 and the trough portion Y 2 .
- a torsion pitch Pn at a time of twisting the filament Fa (the waved filament 5 ) so as to form the three-dimensional wave shape is within a range between 5.0 and 600.0 mm, when it is smaller than 5.0 mm, the apparent outer diameter of the cord becomes small, and when it is larger than 600.0 mm, an effect of making three-dimensional is reduced, so that the effect of improving the rubber permeability can not be sufficiently achieved, in both cases.
- a twist pitch Py of the sheath 3 twisting around the three-dimensional core 2 that is, a pitch for winding the filament Fb is preferably set to a range between 5.0 and 30.0 mm.
- the twist pitch Py is smaller than 5.0 mm, an original extension of the cord is increased, a reinforcing effect is deteriorated, and a wire length between the filaments Fa and Fb is largely different, so that a stress distribution becomes unbalanced and the strength at a time of being broken tends to be reduced.
- the twist pitch Py is over 30.0 mm, the filament tends to be easily scattered and a shape keeping property of the cord is deteriorated.
- a twisting direction of the sheath 3 may be coincided with a torsional direction of the core 2 , that is, the filament Fa, or may be differentiated therefrom. Further, it is preferable in view of keeping the strength of the cord that the torsional pitch Pn is generally set to be larger than the twist pitch Py.
- FIGS. 4A and 4B show another embodiment of the metal cord 1 .
- FIG. 4A shows a case that the sheath 3 formed of three filaments Fb is formed around a core a obtained by twisting the two-dimensional waved filament Fa
- FIG. 4B shows a case that the sheath 3 is formed of one filament Fb.
- a metal cord of a layer structure is manufactured by way of trial on the basis of the specification shown in Table 1, rubber permeability and a fatigue resistance of each of the trial cords are tested, and results thereof are described in Table 1 mentioned above.
- FIGS. 5A and 5B cross sectional shapes of the metal cord used in the comparative embodiments are shown in FIGS. 5A and 5B.
- Test cords are inserted within an unvulcanized rubber sheet in parallel at an interval, and are vulcanized under heating and pressurizing.
- the test cords are taken out from the obtained vulcanized rubber sheet, the rubber is removed from the surface thereof as much as possible, the test cord is dissembled, a length of a portion in which the rubber is charged in the gap within the cord is measured about 10 cm, and rubber permeability is set by a rate of the length with respect to a whole length.
- the measurement mentioned above is applied to ten cords, and a measured value of the cord is set by an average value.
- the core is formed by one two-dimensional waved filament and the waved filament is bonded to the sheath while being twisted, it is possible to make the waved filament in a three-dimensional wave shape within the cord. Accordingly, it is possible to sufficiently secure the gap between the filaments of the sheath and it is possible to widely increase the rubber permeability. Further, it is possible to widely improve the fatigue resistance.
Abstract
The invention can improve rubber permeability and a fatigue resistance in a metal cord in a layer structure. There is formed layer structure in which a sheath (3) constituted by 1 to 6 filaments (Fb) is formed around a core constituted by 1 filament (Fa). The filament (Fa) is constituted by a waved filament (5) waved in a two-dimensional wave shape in a state before being bundled, and is twisted with the sheath while applying the torsion so as to be formed in a three-dimensional wave shape within a cord.
Description
- 1. Field of the Invention
- The present invention relates to a metal cord used as a reinforcing member for a rubber article such as a pneumatic tire or the like, and particularly relates to a metal cord for reinforcing a rubber article which is structured such that a rubber easily intrudes into an inner portion of the rubber so as to improve a corrosion resistance as well as to improve a fatigue resistance.
- 2. Description of the Background Art
- For example, in general, a metal cord supplied to the pneumatic tire widely employs a layer structure in which normally filaments having the same wire diameter are closest arranged in order to increase a cord tensional strength per a cord diameter and obtain an improved fatigue resistance. However, in such a closest layer structure mentioned above, since a gap between the filaments within a sheath is small, the rubber is not sufficiently intruded into the inner portion of the cord but a cavity is easily generated, so that a moisture easily intrude within the cavity so as to corrode the cord.
- Accordingly, there is proposed, for example, in Japanese Patent Publication JP-A-9-31875 gazette a matter of improving a degree of intrusion of the rubber into the inner portion of the cord by applying a two-dimensional wave-shaped modeling to a filament of a core in the layer structure and specifying a relation between a waving shape and a wire diameter of the filament.
- However, in the proposal mentioned above, since the waved filament in the core is twisted with the sheath without torsion, it is still in a two-dimensional waving state even in a state of becoming the cord. Accordingly, there has been a problem that in comparison with the three-dimensional waving state, an apparent diameter of the core is small and an effect of improving the rubber intrusion is not much.
- Accordingly, an object of the present invention is to provide a metal cord for reinforcing a rubber article which on the basis of forming a core by one waved filament modeled in two-dimensional as well as twisting the waved filament with a sheath while applying the torsion, can make the waved filament in a three-dimensional wave shape within a cord, thereby increasing an apparent diameter of the core, sufficiently securing a gap between the filaments of the sheath and increasing a degree of intrusion of the rubber.
- In order to achieve the object mentioned above, in accordance a first aspect of the present invention, there is provided a metal cord in a layer structure for reinforcing a rubber article including:
- a core formed of one filament; and
- a sheath formed of 1 to 6 filaments arranged around the core,
- wherein said filament of the core is formed of a waved filament waved in a two-dimensional wave shape having crest portions and trough portions in a repeated manner, in a state before being bundled, and is twisted with said sheath while applying the torsion so as to be formed in a three-dimensional wave shape within a cord.
- Further, in accordance with a second aspect of the present invention, a diameter d of the filament of the core is between 0.15 and 0.50 mm and substantially the same as that of the filament of the sheath.
- FIG. 1 is a cross sectional view of a metal cord in accordance with an embodiment of the present invention;
- FIG. 2 is a schematic side elevational view of the metal cord;
- FIG. 3 is a side elevational view showing a waved shape of a filament of a core in a state before bundling;
- FIGS. 4A and 4B are cross sectional views showing another embodiment of a metal cord in accordance with the present invention; and
- FIGS. 5A and 5B are cross sectional views showing a metal cord in accordance with a comparative embodiment used in a test in Table 1.
- A description will be given below of an embodiment in accordance with the present invention with reference to the accompanying drawings.
- FIG. 1 is a cross sectional view showing an example of a metal cord for reinforcing a rubber article in accordance with the present invention, FIG. 2 is a schematic side elevational view of the metal cord, and FIG. 3 is a side elevational view showing a waved state of a filament of a core.
- In FIG. 1, a metal core1 for reinforcing a rubber article (hereinafter, refer to a metal cord 1) has a layer structure obtained by bundling a
core 2 formed of one filament Fa and of 1 to 6 filaments Fb arranged around thecore 2. In this case, in FIG. 1, there is exemplified a 1+6 structure in which a number of the filaments Fb of thesheath 3 is set as 6. - In the filament Fa of the
core 2, as shown in FIG. 3, awaved filament 5 modeled in a two-dimensional wave shape in which crest portions Y1 and trough portions Y2 are repeated in a state before being bundled is used. In this case, in the present example, there is exemplified a case that thewaved filament 5 is formed in a zigzag shape in which a straight portion Y3 is interposed between the crest portion Y1 and the trough portion Y2, however, may be formed in a sine curve shape or the like which is formed only of curves. The two-dimensional waving mentioned above is easily processed in comparison with the three-dimensional waving, for example, a spiral shape or the like, and has an advantage that a dimensional accuracy is high and stable as well as it is easy to treat. - On the contrary, a
non-waved filament 6 formed in a substantially linear shape in a state before being bundled is used as the filament Fb of theseethe 3. - Then, in accordance with the present invention, as shown in FIG. 2, the metal cord1 is formed by twisting the
waved filament 5 with thesheath 3 while applying torsion. In other words, in the present example, sixnon-waved filament 6 are spirally wound around thecore 2 formed in the three-dimensional wave shape by applying the torsion to thewaved filament 5. - As mentioned above, within the metal cord 1, the two-dimensional
waved filament 5 is formed in the three-dimensional wave shape due to the torsion thereof. Accordingly, the apparent diameter of thecore 2 is further increased in comparison with the case having no torsion, whereby it is possible to stably secure a sufficient gap between the filaments Fb of thesheath 3 surrounding around the core and it is possible to widely improve a degree of intrusion of the rubber (rubber permeability). Further, since a fretting (a phenomenon that an abrasion is generated by a relative repeated fine slip between the filaments) can be restricted by securing the gap, a fatigue resistance can be further improved. - In this case, the metal cord1 is made in the layer structure, because it is possible to increase the number of the filaments with respect to the cord diameter at a time of constituting the cord, so that it is possible to increase a cord strength, it is possible to increase an effect of reinforcing the rubber article and it is possible to narrow the filament at that degree so as to improve a bending fatigue property.
- The number of the filament Fa used in the
core 2 is required to be set to one in view of a corrosion resistance. Further, the number of the filaments Fb used in thesheath 3 is between 1 and 6, and when it is over six, the waved size in the filament Fa of thecore 2 becomes too large, and is disadvantageous in strength. - In this case, it is preferable that the filament Fa and the filament Fb are set to have the same diameter, whereby it is possible to commonly use a wire extending process and it is possible to economically manufacture the cord.
- At this time, in order to make the number of the filaments proper and obtain an excellent cord strength and bending fatigue, it is preferable to set the wire diameter d of the filaments Fa and Fb within a range between 0.15 and 0.50 mm. When the wire diameter d is less than 0.15 mm, it is too narrow and becomes disadvantageous in view of the cord strength, and on the contrary, when it is over 0.50 mm, it becomes disadvantageous in view of the bending fatigue property.
- As shown in FIG. 3, in the waving of the filament Fa in a state before being bundled, it is preferable to respectively set a wave pitch Pw and a wave height h of the filament Fa to a range between 3.0 and 9.0 mm and a range between 0.20 and 0.80 mm, whereby it is possible to economically wave and it is possible to secure excellent rubber permeability. When the wave pitch Pw becomes smaller than 3.0 mm or the wave height h becomes larger than 0.80 mm, an amount of waving process is increased and a working cost is increased, and on the contrary, a damage applied to the filament Fa due to the process is increased so as to cause a reduction of strength. On the contrary, in the case that the wave pitch Pw is larger than 9.0 mm or the wave height h is smaller than 0.20 mm, the waving becomes too small, and an effect of improving the rubber permeability cannot be sufficiently achieved. In this case, the wave pitch Pw corresponds to a distance in a longitudinal direction between the crest portions Y1 and Y1, and the wave height h corresponds to a distance in an amplitude direction between the crest portion Y1 and the trough portion Y2.
- Next, as shown in FIG. 2, it is preferable that a torsion pitch Pn at a time of twisting the filament Fa (the waved filament5) so as to form the three-dimensional wave shape is within a range between 5.0 and 600.0 mm, when it is smaller than 5.0 mm, the apparent outer diameter of the cord becomes small, and when it is larger than 600.0 mm, an effect of making three-dimensional is reduced, so that the effect of improving the rubber permeability can not be sufficiently achieved, in both cases.
- Further, a twist pitch Py of the
sheath 3 twisting around the three-dimensional core 2, that is, a pitch for winding the filament Fb is preferably set to a range between 5.0 and 30.0 mm. When the twist pitch Py is smaller than 5.0 mm, an original extension of the cord is increased, a reinforcing effect is deteriorated, and a wire length between the filaments Fa and Fb is largely different, so that a stress distribution becomes unbalanced and the strength at a time of being broken tends to be reduced. Further, when the twist pitch Py is over 30.0 mm, the filament tends to be easily scattered and a shape keeping property of the cord is deteriorated. - A twisting direction of the
sheath 3 may be coincided with a torsional direction of thecore 2, that is, the filament Fa, or may be differentiated therefrom. Further, it is preferable in view of keeping the strength of the cord that the torsional pitch Pn is generally set to be larger than the twist pitch Py. - In this case, FIGS. 4A and 4B show another embodiment of the metal cord1. FIG. 4A shows a case that the
sheath 3 formed of three filaments Fb is formed around a core a obtained by twisting the two-dimensional waved filament Fa, and FIG. 4B shows a case that thesheath 3 is formed of one filament Fb. - As mentioned above, the description is in detail given of the particularly preferable embodiment in accordance with the present invention, however, the present invention is not limited to the illustrated embodiment, can be modified in various aspects.
- (Embodiment)
- A metal cord of a layer structure is manufactured by way of trial on the basis of the specification shown in Table 1, rubber permeability and a fatigue resistance of each of the trial cords are tested, and results thereof are described in Table 1 mentioned above.
- In this case, cross sectional shapes of the metal cord used in the comparative embodiments are shown in FIGS. 5A and 5B.
- (1) Rubber permeability:
- Test cords are inserted within an unvulcanized rubber sheet in parallel at an interval, and are vulcanized under heating and pressurizing. The test cords are taken out from the obtained vulcanized rubber sheet, the rubber is removed from the surface thereof as much as possible, the test cord is dissembled, a length of a portion in which the rubber is charged in the gap within the cord is measured about 10 cm, and rubber permeability is set by a rate of the length with respect to a whole length. The measurement mentioned above is applied to ten cords, and a measured value of the cord is set by an average value.
- (2) Fatigue resistance:
- From the vulcanized rubber sheet, a repeated bending is applied on the basis of a repeated bending fatigue test (Dematia method) in proportion to JIS L1017 until the vulcanized rubber sheet is broken, and a broken number is measured. The measurement mentioned above is applied to ten rubber sheets and an average value is estimated on the basis of an index display obtained by setting a value of the comparative embodiment 1 to 100. The larger the numerical value is, the higher the fatigue resistance is, so that it is excellent.
TABLE 1 COMPARATIVE COMPARATIVE EMBODIMENT 1 EMBODIMENT 2EMBODIMENT 1 EMBODIMENT 2EMBODIMENT 3STRUCTURE (LAYER 1 + 6 (FIG. 5A) 1 + 6 (FIG. 5A) 1 + 6 (FIG. 5A) 1 + 6 (FIG. 5A) 1 + 6 (FIG. 5A) BUNDLING) FILAMENT OF CORE WIRE DIAMETER d (mm) 0.32 0.30 0.45 0.38 0.30 WITH OR WITHOUT TWO- Without With With With With DIMENSIONAL WAVING WAVE PITCH Pw (mm) — 6.0 3.5 4.5 6.0 WAVE HEIGHT h (mm) — 0.55 0.35 0.45 0.55 TORSION PITCH Pn (mm) — — 10 30 45 FILAMENT OF SHEATH WIRE DIAMETER d (mm) 0.32 0.30 0.45 0.38 0.30 NUMBER (NUMBER) 6 6 1 3 6 TWIST PITCH (mm) 15 15 7 10 15 RUBBER PERMEABILITY (%) 10 67 100 100 99 FATIGUE RESISTANCE 100 105 109 113 121 (index number) - As comparing the
embodiment 3 with thecomparative embodiments 1 and 2, it is possible to confirm that the metal cord in accordance with theembodiment 3 of the present invention can widely improve the rubber permeability and can widely improve the fatigue resistance. - As mentioned above, in accordance with the present invention, since the core is formed by one two-dimensional waved filament and the waved filament is bonded to the sheath while being twisted, it is possible to make the waved filament in a three-dimensional wave shape within the cord. Accordingly, it is possible to sufficiently secure the gap between the filaments of the sheath and it is possible to widely increase the rubber permeability. Further, it is possible to widely improve the fatigue resistance.
Claims (2)
1. A metal cord for reinforcing a rubber article formed comprising:
a core formed of one filament; and
a sheath formed of 1 to 6 filaments arranged around the core,
wherein said filament of the core is formed of a waved filament waved in a two-dimensional wave shape having crest portions and trough portions in a repeated manner, in a state before being bundled, and is twisted with said sheath while applying the torsion so as to be formed in a three-dimensional wave shape within a cord.
2. The metal cord for reinforcing a rubber article as claimed in claim 1 , wherein a diameter d of said filament is between 0.15 and 0.50 mm and substantially the same as that of the filament of said sheath.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2000-355994 | 2000-11-22 | ||
JP2000355994A JP4430810B2 (en) | 2000-11-22 | 2000-11-22 | Method for producing metal cord for reinforcing rubber articles |
Publications (1)
Publication Number | Publication Date |
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US20020096238A1 true US20020096238A1 (en) | 2002-07-25 |
Family
ID=18828315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/989,426 Abandoned US20020096238A1 (en) | 2000-11-22 | 2001-11-21 | Metal cord for reinforcing rubber article |
Country Status (3)
Country | Link |
---|---|
US (1) | US20020096238A1 (en) |
EP (1) | EP1211349A3 (en) |
JP (1) | JP4430810B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100300592A1 (en) * | 2007-11-27 | 2010-12-02 | Shinichi Miyazaki | Steel cord for tire and pneumatic tire using the steel cord |
US10046511B1 (en) | 2017-12-26 | 2018-08-14 | Arevo, Inc. | Alleviating torsional forces on fiber-reinforced thermoplastic filament |
US11286587B2 (en) * | 2017-12-25 | 2022-03-29 | Nv Bekaert Sa | Steel cord |
US11292190B2 (en) | 2017-12-26 | 2022-04-05 | Arevo, Inc. | Depositing arced portions of fiber-reinforced thermoplastic filament |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60141986D1 (en) * | 2001-10-30 | 2010-06-10 | Pirelli | TIRES WITH A WOLF CORE WITH PRE-FORMED WIRES |
JP5678558B2 (en) * | 2010-10-05 | 2015-03-04 | 横浜ゴム株式会社 | Pneumatic tire |
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US5836145A (en) * | 1994-10-28 | 1998-11-17 | Sumitomo Rubber Industries, Ltd. | Tire cord having a core and sheath with improved rubber penetration |
US6065518A (en) * | 1995-08-01 | 2000-05-23 | Sumitomo Rubber Industries, Ltd. | Heavy duty pneumatic tire with high elongation steel belt cord |
US6102095A (en) * | 1996-04-18 | 2000-08-15 | Bridgestone Corporation | Corrosion resistant steel cords and pneumatic tires reinforced with same |
US6415593B1 (en) * | 1998-07-29 | 2002-07-09 | Sumitomo Rubber Industries, Ltd. | Metallic cord and pneumatic tire |
US6745806B2 (en) * | 2000-11-22 | 2004-06-08 | Sumitomo Rubber Industries, Ltd. | Radial tire for heavy load with specified metal carcass cord |
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JP3072929B2 (en) * | 1991-11-21 | 2000-08-07 | 住友ゴム工業株式会社 | Pneumatic tire |
JPH05302282A (en) * | 1992-04-24 | 1993-11-16 | Bridgestone Corp | Steel cord for reinforcing rubber article and pneumatic radial tire for heavy load |
JP3222257B2 (en) * | 1993-04-09 | 2001-10-22 | 株式会社ブリヂストン | Steel cord for reinforcing rubber articles and pneumatic radial tire using the same |
EP0834612A1 (en) * | 1996-10-03 | 1998-04-08 | N.V. Bekaert S.A. | Steel cord with a core and a layer |
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2000
- 2000-11-22 JP JP2000355994A patent/JP4430810B2/en not_active Expired - Fee Related
-
2001
- 2001-11-21 EP EP01127743A patent/EP1211349A3/en not_active Withdrawn
- 2001-11-21 US US09/989,426 patent/US20020096238A1/en not_active Abandoned
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5836145A (en) * | 1994-10-28 | 1998-11-17 | Sumitomo Rubber Industries, Ltd. | Tire cord having a core and sheath with improved rubber penetration |
US6065518A (en) * | 1995-08-01 | 2000-05-23 | Sumitomo Rubber Industries, Ltd. | Heavy duty pneumatic tire with high elongation steel belt cord |
US6102095A (en) * | 1996-04-18 | 2000-08-15 | Bridgestone Corporation | Corrosion resistant steel cords and pneumatic tires reinforced with same |
US6415593B1 (en) * | 1998-07-29 | 2002-07-09 | Sumitomo Rubber Industries, Ltd. | Metallic cord and pneumatic tire |
US6745806B2 (en) * | 2000-11-22 | 2004-06-08 | Sumitomo Rubber Industries, Ltd. | Radial tire for heavy load with specified metal carcass cord |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100300592A1 (en) * | 2007-11-27 | 2010-12-02 | Shinichi Miyazaki | Steel cord for tire and pneumatic tire using the steel cord |
US11286587B2 (en) * | 2017-12-25 | 2022-03-29 | Nv Bekaert Sa | Steel cord |
US10046511B1 (en) | 2017-12-26 | 2018-08-14 | Arevo, Inc. | Alleviating torsional forces on fiber-reinforced thermoplastic filament |
US10239257B1 (en) | 2017-12-26 | 2019-03-26 | Arevo, Inc. | Depositing portions of fiber-reinforced thermoplastic filament while alleviating torsional forces |
US11292190B2 (en) | 2017-12-26 | 2022-04-05 | Arevo, Inc. | Depositing arced portions of fiber-reinforced thermoplastic filament |
Also Published As
Publication number | Publication date |
---|---|
EP1211349A2 (en) | 2002-06-05 |
JP4430810B2 (en) | 2010-03-10 |
EP1211349A3 (en) | 2004-07-28 |
JP2002161487A (en) | 2002-06-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SUMITOMO RUBBER INDUSTRIES, LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MIYAZAKI, SHINICHI;YAMAZAKI, KAZUMI;TODA, OSAMU;REEL/FRAME:012545/0768 Effective date: 20020107 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |