Tires

Abstract

An object of the present invention is to provide a tire to which an electronic component is attached and which has improved durability during driving; and a tire is provided comprising a tread section, a bead section composed of a bead tapex and a bead core, and a carcass layer, wherein an electronic component is provided between the bead tapex and the carcass layer; and loss tangent 70 °C-tanδ-BA of the bead tapex, which is measured under the conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial elongation of 5%, a dynamic strain rate of 1%, and tensile deformation mode, and a length L (mm) of the electronic component in the circumferential direction of the tire satisfying the following (Formula 1). 70 ° C − tan δ − BA × L < 15

Description

[TECHNICAL FIELD]

[0001] The present invention relates to tires in which electronic components, such as RFID, are embedded. [STATE OF THE ART]

[0002] In recent years, it has been proposed to embed electronic devices, such as RFID (Radio-Frequency Identification) transponders (hereinafter referred to simply as "RFID"), to record information such as manufacturing / shipping information and driving information of tires and to communicate with the outside world (for example, PTL 1 to 4). [PTL on the state of the art][PTL] [PTL 1] JP 2021-506676 A [PTL 2] JP 2021-514891 A [PTL 3] JP 2021-084510 A [PTL 4] JP 2021-127114 A [SUMMARY OF THE INVENTION][PROBLEM TO BE SOLVED BY THE INVENTION]

[0003] However, if an electronic component is embedded in an unvulcanized tire and then integrated with the tire, there is a risk that the electronic components and the rubber element will separate due to impact loads during driving, reducing the tire's durability.

[0004] One object of the present invention is therefore to provide a tire to which an electronic component is attached and which has improved durability during driving. [Means to solve the problem]

[0005] The present invention is a tire comprising a tread section, a bead section consisting of a bead tape and a bead core, and a carcass layer, wherein an electronic component is provided between the bead tapex and the carcass layer; and Loss tangent 70 °C-tanδ-BA of the bead tapex, which is measured under the conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial strain of 5 %, a dynamic strain rate of 1 %, and tensile deformation mode, and a length L (mm) of the electronic component in the tire circumferential direction satisfy the following (formula 1). 70 °C−tanδ−BA×L<15 [EFFECT OF INVENTION]

[0006] According to the present invention, it is possible to improve the durability of a tire to which an electronic component is attached while driving. [BRIEF DESCRIPTION OF DRAWINGS] [ Fig. 1] is a schematic cross-sectional view showing the configuration of a tire according to an embodiment of the present invention. [ Fig. 2] is a schematic cross-sectional view showing the configuration of a tire according to an embodiment of the present invention. [ Fig. 3A and Fig. 3B] are schematic diagrams that depict the shape of an electronic component. [ Fig. 4] is a schematic cross-sectional view showing the embedded position of an electronic component in a comparative example. [ Fig. 5] is a schematic cross-sectional view showing the embedded position of an electronic component in a comparative example. [EMBODIMENTS FOR CARRYING OUT THE INVENTION][1] Features of the tire according to the present invention

[0007] First, the features of the tire according to the present invention will be explained. 1. Overview

[0008] The tire according to the present invention comprises a tread section, a bead section consisting of a bead tapex and a bead core, and a carcass layer; and an electronic component is provided between the bead tapex and the carcass layer. Furthermore, the loss tangent 70 °C tanδ-BA of the bead tapex, measured under conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial elongation of 5%, a dynamic strain rate of 1%, and tensile deformation mode, and a length L (mm) of the electronic component in the circumferential direction of the tire, satisfy the following (Formula 1). 70 °C−tanδ−BA×L<15

[0009] By exhibiting these properties, as described later, it is possible to improve the durability of a tire to which an electronic component is attached during driving. 2. Mechanism of effect expression in the tire according to the present invention

[0010] The mechanism of the above-mentioned effect expression in the tire according to the present invention is assumed as follows.

[0011] As described above, in the tire according to the present invention, the electronic component is provided between the bead tread and the carcass layer.

[0012] The carcass layer is a tire element that forms the tire's frame and has a much higher modulus of elasticity than other tire elements. Since the carcass layer, which forms the tire's frame, is the tire's center of deformation, the amount of deformation near the carcass layer during driving is assumed to be less than that of the surrounding area.

[0013] On the other hand, since the bead section, which is made up of the bead tapex and the bead core, is a section that is attached to the rim, it is assumed that the amount of deformation of the bead tapex, which is connected to the bead core attached to the rim, is small during driving.

[0014] Therefore, by providing an electronic component between the bead tread and the carcass layer, it is possible to reduce the amount of deformation around the electronic component during driving and suppress the occurrence of detachment of the electronic component within the tire. As a result, it is believed that tire damage can be suppressed and the durability of the tire to which the electronic component is attached can be improved during driving.

[0015] Although the amount of deformation of the bead tape during driving, as described above, is considered small, it is nevertheless deformed along the carcass layer as the tire rolls, and consequently heat is generated.

[0016] If the heat generation of the bead tape becomes too high, the temperature near the electronic component will rise, and there is a risk of the electronic components detaching within the tire. Therefore, the heat generation of the bead tape must be suppressed. On the other hand, since the electronic component is made of a material other than rubber, stress is more likely to be concentrated at the interface of the electronic component than in surrounding elements, and there are concerns that the electronic component could detach depending on the degree of stress. For this reason, it is considered necessary to appropriately control the relationship between the loss tangent of the bead tape and the length of the electronic component in the tire's circumferential direction.

[0017] This means that the loss tangent (tanδ) is a viscoelastic parameter that indicates energy absorption capacity. The larger the value, the more energy is absorbed, heat is generated, and the material deforms. Conversely, the shorter the length of the electronic component in the tire's circumferential direction, the easier it is for heat to be released, thus suppressing heat generation. Therefore, if the product of the loss tangent of the bead patch and the length of the electronic component in the tire's circumferential direction can be controlled to a certain value or less, it is possible to suppress the heat generated between the bead filler layer and the electronic component in the contact area. This makes it easier to improve adhesion and prevent the electronic component from detaching within the tire.As a result, it is assumed that damage to the tire can be suppressed and the durability of the tire to which an electronic component is attached can be improved while driving.

[0018] In particular, if the product of the loss tangent 70 °C-tanδ-BA of the bead tapex, measured under conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial elongation of 5%, a dynamic strain rate of 1% and tensile deformation mode, and the length L (mm) of the electronic component in the tire circumferential direction (i.e. 70 °C-tanδ-BA × L) is less than 15, the heat generation of the bead tapex and the occurrence of detachment of the electronic component in the tire can be sufficiently suppressed, and it is assumed that the durability of the tire to which an electronic component is attached can be improved during driving.The product is preferably 14.30 or less, even more preferably 13.75 or less, even more preferably 13.00 or less, even more preferably 12.00 or less, even more preferably 11.70 or less, even more preferably 11.00 or less, even more preferably 10.80 or less, even more preferably 9.75 or less, even more preferably 9.00 or less, even more preferably 8.25 or less and even more preferably 7.50 or less.

[0019] As described above, the tire according to the present invention incorporates an electronic component between the bead patch and the carcass layer. The amount of deformation around this electronic component is reduced during driving, thereby preventing detachment and damage to the electronic component within the tire. Furthermore, the product of the loss tangent of the bead patch and the length of the electronic component in the tire's circumferential direction is controlled to a specific value or less, thus reducing heat generation in the bead patch and sufficiently suppressing detachment of the electronic component within the tire. Consequently, it is assumed that the durability of a tire with an attached electronic component can be improved during driving.

[0020] Above, the loss tangent (tanδ) can be measured, for example, using a viscoelasticity measuring device, such as the “Eplexor (registered trademark)” manufactured by GABO. [2] Further preferred embodiments of the tire according to the present invention

[0021] The tire according to the present invention can obtain even greater effects by using the following embodiments. 1. Loss tangent of tread

[0022] In the present invention, the loss tangent 30 °C-tanδ-TR of the tread section, measured under the conditions of a temperature of 30 °C, a frequency of 10 Hz, an initial elongation of 5%, a dynamic strain rate of 1%, and tensile deformation mode, is preferably less than 0.25. It is more preferably 0.20 or less, and even more preferably 0.15 or less. In this way, by setting 30 °C-tanδ-TR to a small value, the amount of heat generated in the tread section during driving can be reduced, and the temperature rise of the entire tire can be suppressed. It is assumed that the durability of a tire to which an electronic component is attached during driving can be further improved.

[0023] At this time, the loss tangent 0 °C-tanδ-TR of the tread section, measured under the conditions of temperature 0 °C, frequency 10 Hz, initial elongation 5%, dynamic strain rate 1%, and tensile deformation mode, is preferably greater than 0.50 and more preferably 0.65 or greater. In this way, by increasing the loss tangent tanδ at low temperatures, since the vibrations occurring at the surface of the tread section due to the influence of the road surface during driving can be suppressed, it is assumed that the deformation of the bead section occurring due to vibration at the surface of the tread section can be sufficiently suppressed, and the durability of the tire to which an electronic component is attached during driving can be further improved.

[0024] Note that the "tread portion" refers to a member in a region constituting the ground contact surface of a tire, and a portion outward in the tire radial direction from a member including a fiber material, such as a carcass, a belt layer, and a belt reinforcing layer. The tread portion may be formed of only one layer of cap rubber, may be formed of two layers by providing a rubber base layer within the cap rubber layer, may be formed of three layers, or may be formed of four or more layers. In this case, the thickness of the cap rubber layer over the entire tread portion is preferably 10% or more. Note that the thickness of the cap rubber layer in the entire tread portion is more preferably 70% or more.

[0025] The thickness of the rubber cover layer and the thickness of the rubber base layer described above can be calculated by adding the thickness of the rubber cover layer and the thickness of the rubber base layer to the thickness of the tread section, which is measured with the bead section aligned to the standardized rim width in a cross-section cut out in the radial direction of the tire.

[0026] Here, the "standardized rim" is a rim defined for each tire within a standard system that includes a standard on which the tire is based. For example, in the case of JATMA (Japan Automobile Tire Association), it is the standard rim in applicable sizes described in JATMA's "JATMA YEAR BOOK"; in the case of ETRTO (The European Tire and Rim Technical Organization), it is the "Measuring Rim" described in the "STANDARDS MANUAL"; and in the case of TRA (The Tire and Rim Association, Inc.), it is the "Design Rim" described in its "YEAR BOOK." References are made to JATMA, ETRTO, and TRA in that order, and if an applicable size exists at the time of reference, that standard is followed.In the case of tires not specified in the standard, it refers to a rim that can be mounted and maintain internal pressure, that is, the rim that does not cause air leakage between the rim and the tire and has the smallest rim diameter and then the narrowest rim width. 2. Tire weight and maximum load capacity

[0027] In the present invention, the ratio of tire weight (kg) to the maximum load capacity (kg) of the tire (tire weight / maximum load capacity) is preferably less than 0.0150. Thus, tires with a low tire weight compared to the maximum load capacity of the tire have relatively thin rubber, so it is possible to sufficiently suppress the temperature rise of the entire tire, and it is believed that the durability of a tire to which an electronic component is attached during driving can be further improved.The ratio is more preferably 0.0149 or less, even more preferably 0.0148 or less, even more preferably 0.0147 or less, even more preferably 0.0146 or less, even more preferably 0.0145 or less, even more preferably 0.0144 or less, even more preferably 0.0139 or less, even more preferably 0.0135 or less, even more preferably 0.0134 or less and even more preferably 0.0132 or less.

[0028] It should be noted that the above “tire weight (kg)” refers to the weight of the tire alone, not including the weight of the rim.

[0029] And "maximum load capacity (kg)" can be determined as WL from the formula described below, where Wt is the tire section width measured in a standardized condition, Wt (mm), Ht is the tire section height (mm), and Dt is the tire outer diameter (mm). The tire section width Wt here is the maximum width between the outer surfaces of the sidewalls in a standardized condition, excluding any patterns or letters on the tire side surfaces. The tire section height Ht is 1 / 2 of the difference between the tire outer diameter and the nominal diameter of a rim. V={(Dt / 2)2−(Dt / 2−Ht)2}×π×Wt WL=0.000011×V+100

[0030] In the description above, the term "standardized condition" refers to a state in which the tire is mounted on a standardized rim, inflated to a standardized internal pressure, and is not under any load. It should be noted that "standardized internal pressure" is the air pressure specified for each tire by each standard in the standard system that contains the standard on which the tire is based. For JATMA, it is the maximum air pressure; for ETRTO, it is "inflation pressure"; and for TRA, it is the maximum value described in the table "TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES." Reference is made to JATMA, ETRTO, and TRA in the same order as for standardized rims, and if an applicable size exists at the time of reference, that standard is followed.And in the case of a tire not defined in the standard, it is the standardized internal pressure (but 250 kPa or more) of a different tire size (specified in the standard) for which the standardized rim is described as the standard rim. If several standardized internal pressures of 250 kPa or more are listed, the lowest value is used. 3. Distance from the upper end of the bead core to the electronic component in the tire radial direction

[0031] As the embedded position of the electronic component moves away from the bead core, that is, as the distance D2 in the tire radial direction from the top of the bead core to the electronic component increases, the bead apex is more likely to deform and generate heat. Therefore, it is preferable to reduce the 70°C tanδ BA to suppress heat generation as the distance D2 in the tire radial direction from the top of the bead core to the electronic component increases.

[0032] That is, by controlling the product of 70 °C-tanδ-BA and the distance D2 (mm) in the tire radial direction from the top end of the bead core to the electronic component to be equal to or smaller than a predetermined value, it is believed that heat generation is suppressed and the durability of the tire to which an electronic component is attached during driving can be further improved.

[0033] In particular, when the product of 70°C-tanδ-BA and the distance D2 (mm) in the tire radial direction from the top of the bead core to the electronic component (ie, 70°C-tanδ-BA × D2) is 8.5 or less, it is believed that by appropriately suppressing heat generation, the durability of tires to which an electronic component is attached during driving can be further improved. It is more preferably 8.10 or less, even more preferably 8.00 or less, even more preferably 6.75 or less, even more preferably 6.00 or less, and even more preferably 5.25 or less.

[0034] In the description above, the "top end of the bead core" refers to the outer edge of the bead core in the tire radial direction.

[0035] At this time, the ratio of D2 (mm) to the height of the bead apex, that is, the distance H (mm) from the upper end of the bead core to the apex of the bead apex (i.e., D2 / H), is preferably greater than 0.2 and less than 0.8. By positioning the electronic component in such a location, heat generation can be suitably suppressed, and delamination can be prevented. The ratio is further preferably 0.3 or greater and 0.4 or less. 4. Loss tangent of clinch

[0036] A tire is generally provided with a clinch on the outer side in the tire width direction of a bead portion and is attached to a rim when mounted. Therefore, like the bead portion, the amount of deformation during driving is considered small, but it still deforms and generates heat as the tire rolls.

[0037] It is preferred to add control based on the product of loss tangent 70 °C-tanδ-CA of clinch, measured under the conditions of temperature 70 °C, frequency 10 Hz, initial strain 5 % and dynamic strain rate 1 % and tensile deformation mode, and L (mm) (i.e. 70 °C-tanδ-CA × L), in addition to the control based on the product of 70 °C-tanδ-BA and L (mm) (i.e. 70 °C-tanδ-BA × L) described above.

[0038] In particular, if ((70 °C-tanδ-BA + 70 °C-tanδ-CA) × L) is controlled such that it is 25 or less, bead and clinch deformation during driving can be sufficiently suppressed, and it is assumed that the durability of the tire to which an electronic component is attached during driving can be further improved. It is more preferably 24.7 or less, even more preferably 24.1 or less, even more preferably 22.8 or less, even more preferably 22.2 or less, even more preferably 22.0 or less, even more preferably 18.2 or less, even more preferably 13.8 or less, and even more preferably 12.5 or less. 5. Complex module of Wulstapex and Clinch

[0039] (1) As the length L increases, the contact length between the electronic component and the environment also increases, and therefore stress concentration and the starting point for delamination are likely to occur. For this reason, it is preferable to increase the sum of the complex elastic modulus of the bead tapex and the clinch with respect to the length L in order to suppress stress concentration.

[0040] Specifically, when the ratio of the sum of 70°CE*-BA and 70°CE*-CA (70°CE*-BA + 70°CE*-CA) to L (mm) (ie, (70°CE*-BA + 70°CE*-CA) / L) is 0.5 or more, it is believed that stress concentration can be sufficiently suppressed and the durability of the tire to which an electronic component is attached during driving can be further improved. It is more preferably 0.62 mm or more, more preferably 0.84 mm or more, and more preferably 0.92 mm or more.

[0041] It should be noted that the above-mentioned measurements of 70 °CE*-BA and 70 °CE*CA can be carried out in the same way as when measuring loss tangent using a viscoelasticity measuring device such as “Eplexor (registered trademark)” manufactured by GABO.

[0042] (2) It was mentioned above that stress concentration is suppressed by increasing the ratio of the sum of the complex moduli of the bead tapex and the clinch to the length L. It is also preferred to increase the ratio of the complex elastic modulus of the bead tapex with which the electronic component is in direct contact to the length L.

[0043] This means that increasing the complex modulus of the bead tapex is assumed to suppress bead tapex deformation and heat generation. Specifically, if the ratio of 70°CE*-BA to L (mm) (i.e., 70°CE*-BA / L) is 0.5 or greater, it is assumed that, since heat generation and bead tapex deformation can be sufficiently suppressed, with sufficient stiffness for L, the durability of tires to which an electronic component is attached during driving can be further improved. It is further preferably 0.58 or greater, and even more preferably 0.64 or greater.

[0044] (3) As mentioned above, the longer the length L, the longer the contact length between the electronic component and the surroundings becomes, and it is believed that the starting point of peeling is likely to occur. However, by increasing the ratio of the complex elastic modulus of the bead apex to the complex elastic modulus of the clinch and by increasing the ratio to the length L, it becomes easier to suppress the occurrence of deformation at the contact surface between the electronic component and its surroundings. As a result, it is believed that the durability of the tire to which an electronic component is attached during driving can be further improved.

[0045] In particular, if the ratio of length L to the ratio of 70 °CE*-BA to 70 °CE*-CA (i.e., (70 °CE*-BA / 70 °CE*-CA)) / L is 0.05 or more, the occurrence of deformation at the contact surface between the electronic component and its environment is suppressed, and it is assumed that the durability of the tire to which an electronic component is attached is further improved during driving.

[0046] The greater the distance D2 from the top of the bead core to the electronic component in the tire radial direction, the more easily the bead tapex deforms and generates heat. Therefore, it is preferable to increase 70 °CE*-BA with respect to the distance D2 from the top of the bead core to the electronic component in the tire radial direction.

[0047] In particular, if the ratio of 70°CE*-BA to D2 (i.e., 70°CE*-BA / D2) exceeds 0.85, the deformation and heat generation of the bead tapex can be sufficiently suppressed, and it is assumed that the durability of the tire to which an electronic component is attached during driving can be further improved. More preferably, it is 0.91 or higher. 6. Electronic components

[0048] In the present invention, RFID or a sensor is preferably used as the electronic component. RFID can store a large amount of information and read it without contact. It is further preferred considering that manufacturing information, management information, customer information, etc., can be stored in addition to data such as pressure and temperature. Note that specific sensors include, for example, a pressure sensor, a temperature sensor, an acceleration sensor, a magnetic sensor, and a groove depth sensor.

[0049] Preferably, the surface of the electronic component is provided with an adhesive layer or a plating layer to improve adhesion to rubber. This sufficiently suppresses detachment of electronic components.

[0050] It should be noted that a known metal-rubber adhesive, available from LORD Company or similar suppliers, can be used as the specific adhesive layer. The plating layer preferably contains copper and is preferably alloyed with tin, nickel, iron, zinc, cobalt, aluminum, magnesium, or similar metals.

[0051] Furthermore, it is preferred that a coating layer for the electronic component with a thickness of 0.5 mm or more is provided on the surface of the electronic component. In this way, by providing a suitable distance between the electronic component and the adjacent bead patch or carcass layer, it is possible to make the electronic component less susceptible to deformation at the interface and to sufficiently suppress detachment of the electronic component.

[0052] Furthermore, a specific coating layer for electronic components can be, for example, a rubber compound or a thermoplastic elastomer compound. Examples include a rubber compound described in this document or a rubber compound known in the tire industry, etc.

[0053] The product of the shortest distance D1 (mm) to the outer surface of the tire and the weight W (g) of the electronic component (i.e., D1 × W) is preferably 2.5 or less. By controlling D1 × W to such a value, deformation around the electronic component can be sufficiently suppressed, and detachment can be prevented. The product is further preferably 2.2 or less.

[0054] Furthermore, in the present invention, the length in the longitudinal direction of the electronic component (including the antenna) is preferably 80 mm or less, more preferably 70 mm or less, even more preferably 60 mm or less, even more preferably 50 mm or less, and still more preferably 40 mm or less. By selecting such a size, not only can the occurrence of local stress concentration be suppressed, but also the electronic component is allowed to fit properly along the tire member, so that peeling can be sufficiently suppressed, and it is believed that the durability of the tire to which an electronic component is attached during driving can be further improved. [3] embodiment

[0055] The present invention is described in detail below based on embodiments. 1. Tires according to this embodiment

[0056] Fig. 1 and Fig. Figure 2 are schematic cross-sectional views showing the structure of a tire according to one embodiment of the present invention. Fig. 1 and Fig. 2 is 1 a tire, 2 is a bead section, 3 is a sidewall section, 4 is a tread section, 31 is a sidewall, 32 is a carcass layer, 33 is an inner liner, and 34 is an electronic component. The carcass layer 32 is folded back from the inside to the outside in the tire width direction along the lower end of the bead core 21 and bead tapex 22, which form the bead section 2, and then bonded to the inner carcass layer 32. A bead band 24 is provided on the inside of the bead section 2 in the tire width direction, and a clinch 23 extending to the bead band 24 is provided on the outside in the tire width direction.

[0057] As in Fig. 1 and Fig. As shown in Figure 2, in this embodiment an electronic component 34 is provided between the bead patch 22 and the carcass layer 32. "An electronic component is provided between the bead patch and the carcass layer" here means that an electronic component is provided between the surfaces of the bead patch and the carcass layer, which are opposite each other where they come into contact, and includes a case in which the component is embedded in the bead patch or the carcass layer.

[0058] For example, in Fig. 1 an electronic component 34 is provided between the bead taper 22 and the carcass layer 32 on the inside in the tire width direction, and in Fig. 2 is an electronic component 34 provided between the bead patch 22 and the carcass layer 32 on the outside in the tire width direction.

[0059] Fig.3A and Fig. Figure 3B are schematic top views showing the shape of the electronic component used in this embodiment. As shown in Fig. 3A and Fig. As shown in 3B, the electronic component 34 contains a main body 34a consisting of an IC chip and an antenna 34b.

[0060] With this configuration, the bead taper 22, the clinch 23, and the tread section 4 meet each of the aforementioned parameters, ensuring that the amount of deformation around the electronic component is sufficiently low, thus suppressing breakage and damage to the electronic component. As a result, the durability of the tire with an attached electronic component can be improved during driving. 2. Rubber composition

[0061] In this embodiment, each rubber composition forming the bead tapex, clinch, and tread described above (hereinafter referred to as "bead tapex rubber composition", "clinch rubber composition", and "tread rubber composition") can be obtained by kneading various compound materials, such as rubber components, reinforcing materials, antioxidants, oils, resin materials, and additives. (1) Connecting materials(a) Rubber component

[0062] In any rubber compound, the rubber component is not particularly restricted, and, for example, diene-based rubbers such as natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene-butadiene rubber (SBR), acrylonitrile butadiene rubber (NBR), chloroprene rubber (CR), and butyl rubber (IIR) can be used. These can be used alone or in combinations of two or more. For example, a combination of isoprene rubber and SBR is preferred in a rubber compound for bead taping and in a rubber compound for clinching. In a rubber compound for tread, a combination of SBR and BR is preferred. (a-1) Isoprene-based rubber

[0063] Examples of isoprene-based rubber include natural rubber (NR), isoprene rubber (IR), remolded NR, modified NR, and modified IR. NR is preferred due to its excellent strength.

[0064] Examples of natural rubber (NR) include those commonly used in the tire industry, such as SVR-L, SIR20, RSS#3, and TSR20. Examples of isoprene rubber (IR) are not particularly restricted, and any commonly used tire rubber, such as IR2200 manufactured by Nippon Zeon Co., Ltd., can be used. Examples of remolded NR include deproteinized natural rubber (DPNR) and high-purity natural rubber (UPNR); examples of modified NR include epoxidized natural rubber (ENR), hydrogenated natural rubber (HNR), and grafted natural rubber; and examples of modified IR include epoxidized isoprene rubber, hydrogenated isoprene rubber, and grafted isoprene rubber. These can be used alone or in combinations of two or more.

[0065] In the rubber composition for bead tapex, the content of isoprene-based rubber in 100 parts by mass of the rubber component is preferably 65 parts by mass or more, and more preferably 75 parts by mass or more. On the other hand, it is preferably 95 parts by mass or less, and more preferably 85 parts by mass or less.

[0066] In the rubber composition for clinching, the content of isoprene-based rubber in 100 parts by mass of the rubber component is preferably 50 parts by mass or more, and more preferably 55 parts by mass or more. On the other hand, it is preferably 70 parts by mass or less, and more preferably 65 parts by mass or less.

[0067] In addition, in the rubber composition for tread, an isoprene-based rubber may be contained, if necessary, in an amount of 1 part by mass or more and 45 parts by mass or less in 100 parts by mass of the rubber component. (a-2) SBR

[0068] The weight-average molecular weight of SBR is, for example, more than 100,000 and less than 2,000,000. The styrene content of SBR is, for example, preferably more than 5 mass%, more preferably more than 10 mass%, and even more preferably more than 15 mass%. On the other hand, it is preferably less than 40 mass%, more preferably less than 35 mass%, and even more preferably less than 30 mass%. The vinyl content (1,2-bonded butadiene unit amount) of SBR is, for example, preferably more than 5 mass%, more preferably more than 10 mass%, and even more preferably more than 15 mass%. On the other hand, it is preferably less than 70 mass%, more preferably less than 40 mass%, and even more preferably less than 30 mass%. It should be noted that the structural identification of SBR (measurement of styrene and vinyl content) can be carried out, for example, using a device from JEOL Ltd.The manufactured device of the JNM-ECA series can be used.

[0069] SBR is not particularly restricted, and emulsion-polymerized styrene-butadiene rubber (E-SBR), solution-polymerized styrene-butadiene rubber (S-SBR), and the like can be used, for example. SBR can be either unmodified or modified. Furthermore, hydrogenated SBR, obtained by hydrogenating the butadiene portion in SBR, can be used. The hydrogenated SBR can be obtained by subsequent hydrogenation of the BR portion in SBR, or a similar structure can be obtained by copolymerization of styrene, ethylene, and butadiene.

[0070] The modified SBR is preferably an SBR with a functional group that interacts with a filler, such as silicon dioxide. Examples include end-modified SBR (end-modified SBR having the above functional group at the end), in which at least one end of the SBR is modified with a compound having the above functional group (modifying agent), main chain-modified SBR having the functional group on the main chain, main chain end-modified SBR having the functional group on the main chain and at the end (for example, a main chain end-modified SBR having the above functional group on the main chain and having at least one end modified with the above modifier), and end-modified SBR modified (coupled) with a polyfunctional compound having two or more epoxy groups in the molecule and into which an epoxy group or a hydroxyl group has been introduced.

[0071] Examples of functional groups include an amino group, an amide group, a sillyl group, an alkoxysillyl group, an isocyanate group, an imino group, an imidazole group, a urea group, an ether group, a carbonyl group, an oxycarbonyl group, a mercapto group, a sulfide group, a disulfide group, a sulfonyl group, a sulfinyl group, a thiocarbonyl group, an ammonium group, an imide group, a hydrazo group, an azo group, a diazo group, a carboxyl group, a nitrile group, a pyridyl group, an alkoxy group, a hydroxyl group, an oxy group, and an epoxy group. Furthermore, these functional groups may contain a substituent.

[0072] Furthermore, modified SBR can be, for example, SBR that is modified with a compound (modifying agent) represented by the following formula.

[0073] In the formula, R 1, R 2 and R 3 The groups are either the same or different and each represents an alkyl group, an alkoxy group, a silyloxy group, an acetal group, a carboxyl group (-COOH), a mercapto group (-SH), or a derivative thereof. R 4 and R 5 are the same or different and represent a hydrogen atom or an alkyl group. R 4 and R 5 can be combined with the nitrogen atom to form a ring structure. Here, n represents an integer.

[0074] As the modified SBR modified by the compound (modifier) ​​represented by the above formula, SBR in which the polymerization end (active end) of the solution-polymerized styrene-butadiene rubber (S-SBR) is modified by the compound represented by the above formula (for example, modified SBR described in JP-A-2010-111753) can be used.

[0075] As R 1 , R 2 and R 3 An alkoxy group is suitable (preferably an alkoxy group with 1 to 8 carbon atoms, more preferably an alkoxy group with 1 to 4 carbon atoms). As R 4 and R 5 An alkyl group (preferably an alkyl group with 1 to 3 carbon atoms) is suitable. Here, n is preferably 1 to 5, more preferably 2 to 4, and even more preferably 3. If furthermore R 4 and R 5 When combined with a nitrogen atom to form a ring structure, a 4- to 8-membered ring is preferred. The alkoxy group also includes a cycloalkoxy group (cyclohexyloxy group and the like) and an aryloxy group (phenoxy group, benzyloxy group and the like).

[0076] Specific examples of the above modifier include 2-dimethylaminoethyltrimethoxysilane, 3-dimethylaminopropyltrimethoxysilane, 2-dimethylaminoethyltriethoxysilane, 3-dimethylaminopropyltriethoxysilane, 2-diethylaminoethyltrimethoxysilane, 3-diethylaminopropyltrimethoxysilane, 2-diethylaminoethyltriethoxysilane, and 3-diethylaminopropyltriethoxysilane. These can be used alone or in combinations of two or more.

[0077] Further, as the modified SBR, a modified SBR modified with the following compound (modifying agent) can also be used.Examples of the modifying agent include polyglycidyl ethers of polyhydric alcohols, such as ethylene glycol diglycidyl ether, glyceryl triglycidyl ether, trimethylolethane triglycidyl ether, and trimethylolpropane triglycidyl ether; polyglycidyl ethers of aromatic compounds with two or more phenol groups, such as diglycidylated bisphenol A; polyepoxy compounds, such as 1,4-diglycidylbenzene, 1,3,5-triglycidylbenzene, and polyepoxydated liquid polybutadiene; Tertiary amines containing epoxy groups, such as 4,4'-diglycidyldiphenylmethylamine and 4,4'-diglycidyldibenzylmethylamine; diglycidyl amino compounds, such as diglycidylaniline, N,N'-diglycidyl-4-glycidyloxyaniline, diglycidyl ortholuidine, tetraglycidylmetaxylenediamine, tetraglycidylaminodiphenylmethane, tetraglycidyl-p-phenylenediamine, diglycidylaminomethylcyclohexane and tetraglycidyl-1,3-bisaminomethylcyclohexane; Acid chlorides containing amino groups, such as bis-(1-methylpropyl)carbamate chloride, 4-morpholine carbonyl chloride, 1-pyrrolidine carbonyl chloride, N,N-dimethylcarbamic acid chloride and N,N-diethylcarbamic acid chloride; Epoxy group-containing silane compounds such as 1,3-bis-(glycidyloxypropyl)-tetramethyldisiloxane and (3-glycidyloxypropyl)-pentamethyldisiloxane; Silane compounds containing sulfide groups, such as (trimethylsilyl) [3-(trimethoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(triethoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(tripropoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(tributoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(methyldimethoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(methyldiethoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(methyldipropoxysilyl)propyl] sulfide and (trimethylsilyl) [3-(methyldibutoxysilyl)propyl] sulfide; N-substituted aziridine compounds, such as ethyleneimine and propylenimine; alkoxysilanes, such as methyltriethoxysilane, N,N-bis(trimethylsilyl)-3-aminopropyltrimethoxysilane, N,N-bis(trimethylsilyl)-3-aminopropyltriethoxysilane, N,N-bis(trimethylsilyl)-aminoethyltrimethoxysilane and N,N-bis(trimethylsilyl)-aminoethyltriethoxysilane; (Thio)benzophenone compounds with an amino group and / or a substituted amino group, such as 4-N,N-dimethylaminobenzophenone, 4-N,N-di-t-butylaminobenzophenone, 4-N,N-diphenylaminobenzophenone, 4,4'-bis(dimethylamino)benzophenone, 4,4'-bis(diethylamino)benzophenone, 4,4'-bis(diphenylamino)benzophenone and N,N,N',N'-bis-(tetraethylamino)benzophenone; Benzaldehyde compounds with an amino group and / or a substituted amino group, such as 4-N,N-dimethylaminobenzaldehyde, 4-N,N-diphenylaminobenzaldehyde and 4-N,N-divinylaminobenzaldehyde; N-substituted pyroridones, such as N-methyl-2-pyrrolidone, N-vinyl-2-pyrrolidone, N-phenyl-2-pyrrolidone, Nt-butyl-2-pyrrolidone and N-methyl-5-methyl-2-pyrrolidone; N-substituted piperidones, such as methyl-2-piperidone, N-vinyl-2-piperidone and N-phenyl-2-piperidone; N-substituted lactams, such as N-methyl-ε-caprolactam, N-phenyl-ε-caprolactam, N-methyl-ω-laurilolactam, N-vinyl-ω-laurilolactam, N-methyl-β-propiolactam, and N-phenyl-β-propiolactam; and N,N-bis-(2,3-epoxypropoxy)-aniline, 4,4-methylene-bis-(N,N-glycidylaniline), tris-(2,3-epoxypropyl)-1,3,5-triazine-2,4,6-trione, N,N-diethylacetamide, N-methylmaleimide, N,N-diethyl urea, 1,3-dimethylethylene urea, 1,3-divinylethylene urea, 1,3-diethyl-2-imidazolidinone, 1-methyl-3-ethyl-2-imidazolidinone, 4-N,N-dimethylaminoacetophenone, 4-N,N-diethylaminoacetophenone, 1,3-bis(diphenylamino)-2-propanone and 1,7-Bis(methylethylamino)-4-heptanone. The modification with the above compound (modifying agent) can be carried out by a known procedure.

[0078] SBR can be, for example, SBR manufactured and sold by Sumitomo Chemical Co., Ltd., ENEOS Materials Co., Ltd., Asahi Kasei Co., Ltd., Nippon Zeon Co., Ltd., etc. It should be noted that SBR can be used alone or in combination with two or more other materials.

[0079] In the rubber composition for Wulstapex, the SBR content in 100 parts by mass of the rubber component is preferably 5 parts by mass or more, and more preferably 15 parts by mass or more. Alternatively, it is preferably 35 parts by mass or less, and more preferably 25 parts by mass or less.

[0080] In the rubber composition for clinching, the SBR content in 100 parts by mass of the rubber component is preferably 30 parts by mass or more, and more preferably 35 parts by mass or more. Alternatively, it is preferably 50 parts by mass or less, and more preferably 45 parts by mass or less.

[0081] In the rubber composition for the tread, the SBR content in 100 parts by mass of the rubber component is preferably 70 parts by mass or more, and more preferably 80 parts by mass or more. Although the upper limit is not particularly restricted, it is preferably 95 parts by mass or less, and more preferably 90 parts by mass or less. (a-3) BR

[0082] The weight-mean molecular weight of BR, for example, is greater than 100,000 and less than 2,000,000. The vinyl content of BR, for example, is greater than 1 wt% and less than 30 wt%. The cis content of BR, for example, is greater than 1 wt% and 98 wt% or less. The trans content of BR, for example, is greater than 1 wt% and less than 60 wt%. It should be noted that the cis content can be measured by infrared absorption spectroscopy.

[0083] The BR is not particularly restricted, and BR with a high cis content (90% or more), BR with a low cis content, BR containing syndiotactic polybutadiene crystals, etc., can be used. The BR can be either unmodified BR or modified BR. For example, modified BR can be BR modified with a compound (modifier) ​​represented by the following formula.

[0084] In the formula, R 1 , R 2 and R 3 The groups are either the same or different and each represents an alkyl group, an alkoxy group, a silyloxy group, an acetal group, a carboxyl group (-COOH), a mercapto group (-SH), or a derivative thereof. R 4 and R 5 are the same or different and represent a hydrogen atom or an alkyl group. R 4 and R 5can be combined with the nitrogen atom to form a ring structure. Here, n represents an integer.

[0085] Examples of modified BR, which is modified with the compound (modifier) ​​represented by the formula above, include BR whose polymerization end (active end) is modified with the compound represented by the formula above.

[0086] As R 1 , R 2 and R 3 An alkoxy group is suitable (preferably an alkoxy group with 1 to 8 carbon atoms, more preferably an alkoxy group with 1 to 4 carbon atoms). As R 4 and R 5 An alkyl group (preferably an alkyl group with 1 to 3 carbon atoms) is suitable. Here, n is preferably 1 to 5, more preferably 2 to 4, and even more preferably 3. If furthermore R 4 and R 5When combined with a nitrogen atom to form a ring structure, a 4- to 8-membered ring is preferred. The alkoxy group also includes a cycloalkoxy group (cyclohexyloxy group and the like) and an aryloxy group (phenoxy group, benzyloxy group and the like).

[0087] Specific examples of the above modifier include 2-dimethylaminoethyltrimethoxysilane, 3-dimethylaminopropyltrimethoxysilane, 2-dimethylaminoethyltriethoxysilane, 3-dimethylaminopropyltriethoxysilane, 2-diethylaminoethyltrimethoxysilane, 3-diethylaminopropyltrimethoxysilane, 2-diethylaminoethyltriethoxysilane, and 3-diethylaminopropyltriethoxysilane. These can be used alone or in combinations of two or more.

[0088] Furthermore, as the modified BR, a modified BR modified with the following compound (modifier) ​​can also be used. Examples of the modifier include polyglycidyl ethers of polyhydric alcohols, such as ethylene glycol diglycidyl ether, glycerol triglycidyl ether, trimethylolethane triglycidyl ether, and trimethylolpropane triglycidyl ether; polyglycidyl ethers of aromatic compounds having two or more phenol groups, such as diglycidylated bisphenol A; polyepoxy compounds, such as 1,4-diglycidylbenzene, 1,3,5-triglycidylbenzene, and polyepoxidized liquid polybutadiene; Epoxy group-containing tertiary amines such as 4,4'-diglycidyldiphenylmethylamine and 4,4'-diglycidyldibenzylmethylamine; diglycidylamino compounds such as diglycidylaniline, N,N'-diglycidyl-4-glycidyloxyaniline, diglycidylorthotoluidine, tetraglycidylmetaxylenediamine, tetraglycidylaminodiphenylmethane, tetraglycidyl-p-phenylenediamine, diglycidylaminomethylcyclohexane and tetraglycidyl-1,3-bisaminomethylcyclohexane; Acid chlorides containing amino groups, such as bis-(1-methylpropyl)carbamate chloride, 4-morpholine carbonyl chloride, 1-pyrrolidine carbonyl chloride, N,N-dimethylcarbamic acid chloride and N,N-diethylcarbamic acid chloride; Epoxy group-containing silane compounds such as 1,3-bis-(glycidyloxypropyl)-tetramethyldisiloxane and (3-glycidyloxypropyl)-pentamethyldisiloxane; Silane compounds containing sulfide groups, such as (trimethylsilyl) [3-(trimethoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(triethoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(tripropoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(tributoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(methyldimethoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(methyldiethoxysilyl)propyl] sulfide, (trimethylsilyl) [3-(methyldipropoxysilyl)propyl] sulfide and (trimethylsilyl) [3-(methyldibutoxysilyl)propyl] sulfide; N-substituted aziridine compounds, such as ethyleneimine and propylenimine; alkoxysilanes, such as methyltriethoxysilane, N,N-bis(trimethylsilyl)-3-aminopropyltrimethoxysilane, N,N-bis(trimethylsilyl)-3-aminopropyltriethoxysilane, N,N-bis(trimethylsilyl)-aminoethyltrimethoxysilane and N,N-bis(trimethylsilyl)-aminoethyltriethoxysilane; (Thio)benzophenone compounds with an amino group and / or a substituted amino group, such as 4-N,N-dimethylaminobenzophenone, 4-N,N-di-t-butylaminobenzophenone, 4-N,N-diphenylaminobenzophenone, 4,4'-bis(dimethylamino)benzophenone, 4,4'-bis(diethylamino)benzophenone, 4,4'-bis(diphenylamino)benzophenone and N,N,N',N'-bis-(tetraethylamino)benzophenone; Benzaldehyde compounds with an amino group and / or a substituted amino group, such as 4-N,N-dimethylaminobenzaldehyde, 4-N,N-diphenylaminobenzaldehyde and 4-N,N-divinylaminobenzaldehyde; N-substituted pyroridones, such as N-methyl-2-pyrrolidone, N-vinyl-2-pyrrolidone, N-phenyl-2-pyrrolidone, Nt-butyl-2-pyrrolidone and N-methyl-5-methyl-2-pyrrolidone; N-substituted piperidones, such as methyl-2-piperidone, N-vinyl-2-piperidone and N-phenyl-2-piperidone; N-substituted lactams, such as N-methyl-ε-caprolactam, N-phenyl-ε-caprolactam, N-methyl-ω-laurilolactam, N-vinyl-ω-laurilolactam, N-methyl-β-propiolactam, and N-phenyl-β-propiolactam; and N,N-bis-(2,3-epoxypropoxy)-aniline, 4,4-methylene-bis-(N,N-glycidylaniline), tris-(2,3-epoxypropyl)-1,3,5-triazine-2,4,6-trione, N,N-diethylacetamide, N-methylmaleimide, N,N-diethyl urea, 1,3-dimethylethylene urea, 1,3-divinylethylene urea, 1,3-diethyl-2-imidazolidinone, 1-methyl-3-ethyl-2-imidazolidinone, 4-N,N-dimethylaminoacetophenone, 4-N,N-diethylaminoacetophenone, 1,3-bis(diphenylamino)-2-propanone and 1,7-Bis(methylethylamino)-4-heptanone. The modification with the above compound (modifying agent) can be carried out by a known procedure. These modified BRs can be used alone or in combinations of two or more.

[0089] Products manufactured by companies such as Ube Industries, Ltd., ENEOS Materials Co., Ltd., Asahi Kasei, Nippon Zeon, etc., can be used as BR.

[0090] In the rubber composition for a running surface, the BR content in 100 parts by mass of the rubber component is preferably 5 parts by mass or more, and more preferably 10 parts by mass or more. Alternatively, it is preferably 25 parts by mass or less, and more preferably 20 parts by mass or less.

[0091] In the rubber compositions for Wulstapex and in the rubber composition for Clinch, if necessary, 1 part by mass or more and less than 10 parts by mass of BR may be included in 100 parts by mass of the rubber component. (a-4) Other rubber components

[0092] In the present embodiment, each rubber composition may contain, if necessary, a rubber (polymer) commonly used for manufacturing tires, such as nitrile rubber (NBR), as other rubber components. (b) Compound materials other than rubber components (b-1) Filler

[0093] In this embodiment, each rubber composition preferably contains carbon black, silica, or the like, which is a reinforcing agent, as a filler. In addition to the above-mentioned carbon black and silica, examples of the filler include calcium carbonate, talc, alumina, clay, aluminum hydroxide, and mica. When using silica, it is preferable to use it together with a silane coupling agent.

[0094] In each rubber composition, the total amount of fillers is preferably 40 parts by mass or more, and more preferably 50 parts by mass or more, based on 100 parts by mass of the rubber component. On the other hand, considering dispersibility, the amount in the rubber composition is preferably 150 parts by mass or less, and more preferably 100 parts by mass or less. (i) soot

[0095] Carbon black is used for the purpose of improving crack growth resistance, durability, resistance to UV deterioration, etc. of tires.

[0096] For example, from the viewpoint of reinforcing property for rubber, the nitrogen adsorption specific surface area (N2SA) of carbon black is preferably 30 m 2 / g or more, preferably 50 m 2 / g or more and preferably 60 m 2 / g or more. On the other hand, from the point of view of heat generation, the area is preferably 250 m². 2 / g or less, preferably 150 m 2 / g or less and even more preferably 120 m 2 / g or less. The amount of dibutyl phthalate (DBP) absorbed by carbon black (DBP absorption rate) is, for example, preferably 50 ml / 100 g or more, and more preferably 100 ml / 100 g or more, from the point of view of rubber stiffness. On the other hand, from the point of view of adaptability to rubber deformation, the amount is preferably 250 ml / 100 g or less, and more preferably 150 ml / 100 g or less. It should be noted that the specific nitrogen adsorption surface area of ​​carbon black is measured according to ASTM D4820-93 and the DBP absorption rate is measured according to ASTM D2414-93.

[0097] Carbon black is not particularly restricted, and examples include furnace black (furnace carbon black), such as SAF, ISAF, HAF, MAF, FEF, SRF, GPF, APF, FF, CF, SCF, and ECF; acetylene black (acetylene carbon black); thermal black (thermal carbon black), such as FT and MT; and duct black (duct black), such as EPC, MPC, and CC. These can be used alone or in combinations of two or more.

[0098] In addition to soot from mineral oil, soot derived from biomass obtained by burning lignin or the like, and recovered soot obtained by thermal decomposition and cleaning of rubber products containing soot, such as tires, can be used by appropriately replacing the same quantities of these.

[0099] Specific carbon blacks are not particularly restricted, and examples include N134, N110, N220, N234, N219, N339, N330, N326, N351, N550, and N762. Commercially available products include, for example, those from Asahi Carbon Co., Ltd., Cabot Japan Co., Ltd., Tokai Carbon Co., Ltd., Mitsubishi Chemical Corporation, Lion Corporation, Shin Nikka Carbon Co., Ltd., Columbia Carbon Co., Ltd., etc. These can be used alone or in combinations of two or more.

[0100] In the rubber composition for Wulstapex, the carbon black content, based on 100 parts by mass of the rubber component, is preferably 50 parts by mass or more, and more preferably 60 parts by mass or more. Alternatively, it is preferably 90 parts by mass or less, and more preferably 80 parts by mass or less.

[0101] In the rubber composition for clinch, the carbon black content, based on 100 parts by mass of the rubber component, is preferably 40 parts by mass or more, and more preferably 50 parts by mass or more. Alternatively, it is preferably 70 parts by mass or less, and more preferably 60 parts by mass or less.

[0102] In the rubber composition for the tread, the carbon black content, based on 100 parts by mass of the rubber component, is preferably 5 parts by mass or more, and more preferably 10 parts by mass or more. Alternatively, it is preferably 25 parts by mass or less, and more preferably 20 parts by mass or less. (ii) Silicon dioxide

[0103] Because silica is not electrically conductive, when used as a reinforcing material, the dielectric constant can be lowered, extending the reading range of electronic components. Furthermore, because the hydration water and surface functional groups contained in silica can capture ozone, ozone resistance performance can be improved, and tire durability can be improved.

[0104] For silicon dioxide, it is preferred to use silicon dioxide with a diameter greater than 8 nm, since processability deteriorates if the average primary particle diameter is too small. The thickness is further preferably 9 nm or more, and even more preferably 10 nm or more. On the other hand, from the perspective of ensuring reinforcing properties of the rubber and ensuring steering stability on wet roads while driving, the thickness is preferably 25 nm or less, more preferably 20 nm or less, and even more preferably 17 nm or less.

[0105] The average primary particle diameter of silicon dioxide is the average of the values ​​obtained by observing the smallest particle unit of silicon dioxide forming the agglomerated structure as a circle and by measuring the absolute maximum length of the smallest particle as the diameter of the circle. It can be determined by observation with a transmission or scanning electron microscope, by measuring 400 or more primary particles of silicon dioxide observed within the field of view, and by averaging these measurements.

[0106] The specific BET surface area of ​​silicon dioxide is preferably more than 100 m² from the point of view of obtaining good durability performance. 2 / g and more preferably more than 130 m 2 / g. On the other hand, it is preferably less than 250 m 2 / g and more preferably less than 200 m 2 / g. The above-mentioned specific BET surface area is the value of N2SA measured by the BET method according to ASTM D3037-93.

[0107] Examples of silicon dioxide include dry silicon dioxide (anhydrous silicon dioxide), wet silicon dioxide (hydrated silicon dioxide), and colloidal silicon dioxide. Among these, wet silicon dioxide is preferred because it contains water of hydration, a large amount of silanol groups, and can effectively trap ozone. Furthermore, silicon dioxide from hydrated glass or similar materials, and silicon dioxide from biomass materials such as rice husks, can be used.

[0108] Silicon dioxide can be supplied, for example, by products from Evonik Industries, Rhodia Co., Ltd., Tosoh Silica Co., Ltd., Solvay Japan Co., Ltd., Tokuyama Corporation, etc.

[0109] In the rubber composition for tread, the content of silica based on 100 parts by mass of the rubber component is preferably 40 parts by mass or more, and more preferably 50 parts by mass or more. On the other hand, from the viewpoint of dispersibility in the rubber composition, the content is preferably 110 parts by mass or less, and more preferably 100 parts by mass or less.

[0110] The rubber composition for bead tapex and the rubber composition for clinching may contain silica if necessary. In this case, considering sufficient extrusion processability and ozone resistance, the silica content based on 100 parts by mass of the rubber composition is, for example, preferably 5 parts by mass or more, and more preferably 10 parts by mass or more. Furthermore, it is preferably 20 parts by mass or less, and more preferably 15 parts by mass or less. By setting such an amount of silica, sufficient extrusion processability and ozone resistance performance can be obtained. (iii) Silane coupling agent

[0111] When silica is used as a filler, it is preferable to use a silane coupling agent in combination to improve the dispersibility of the silica by reacting with the silica and to improve mechanical properties and formability.

[0112] The silane coupling agent is not particularly restricted. Examples of the silane coupling agent include sulfide-based ones such as bis(3-triethoxysilylpropyl)tetrasulfide, bis(2-triethoxysilylethyl)tetrasulfide, bis(4-triethoxysilylbutyl)tetrasulfide, bis(3-trimethoxysilylpropyl)tetrasulfide, bis(2-trimethoxysilylethyl)tetrasulfide, bis(2-triethoxysilylethyl)trisulfide, bis(4-trimethoxysilylbutyl)trisulfide, bis(3-triethoxysilylpropyl)disulfide, bis(2-triethoxysilylethyl)disulfide, bis(4-triethoxysilylbutyl)disulfide, bis(3-trimethoxysilylpropyl)disulfide, bis(2-trimethoxysilylethyl)disulfide, bis(4-trimethoxysilylbutyl)disulfide, 3-trimethoxysilylpropyl-N,N-dimethylthiocarbamoyltetrasulfide, 2-Triethoxysilylethyl-N,N-dimethylthiocarbamoyltetrasulfide and 3-Triethoxysilylpropylmethacrylate monosulfide; those based on mercapto, such as 3-mercaptopropyltrimethoxysilane, 2-mercaptoethyltriethoxysilane and NXT and NXT-Z, which are manufactured by Momentive; those based on vinyl, such as vinyltriethoxysilane and vinyltrimethoxysilane; those based on amino acids, such as 3-aminopropyltriethoxysilane and 3-aminopropyltrimethoxysilane; those based on glycidoxy, such as γ-glycidoxypropyltriethoxysilane and γ-glycidoxypropyltrimethoxysilane; Those based on nitro, such as 3-nitropropyltrimethoxysilane and 3-nitropropyltriethoxysilane; and Those based on chlorine, such as 3-chloropropyltrimethoxysilane and 3-chloropropyltriethoxysilane. Among these, a silane coupling agent with a thiocarbonyl group, such as the aforementioned NXT, is preferred. These can be used alone or in combinations of two or more.

[0113] As the silane coupling agent, for example, products from Evonik Industries, Momentive Co., Ltd., Shin-Etsu Silicone Co., Ltd., Tokyo Chemical Industry Co., Ltd., Azumax Co., Ltd., Dow Corning Toray Co., Ltd., etc. can be used.

[0114] For example, the content of the silane coupling agent is preferably more than 3 parts by mass, and more preferably 5 parts by mass or more, based on 100 parts by mass of silica. On the other hand, it is preferably less than 15 parts by mass, and more preferably 10 parts by mass or less. (iv) Other fillers

[0115] In addition to the above-mentioned carbon black and silica, any rubber composition may further contain other fillers commonly used in the tire industry, such as graphite, calcium carbonate, talc, alumina, clay, aluminum hydroxide, mica, and magnesium sulfate. The content of these fillers is, for example, more than 0.1 part by mass and less than 150 parts by mass, based on 100 parts by mass of the rubber component. (b-2) Plasticizer component

[0116] Considering proper dispersion of the powder material during kneading, it is preferable to use a plasticizer component in each rubber composition as needed. Note that the plasticizer component here refers to a component that plasticizes the rubber composition, such as process oil, extender oil for rubber components, liquid rubber, and resin components.

[0117] At this time, in each rubber composition, the content of the plasticizer component, based on 100 parts by mass of the rubber component, is preferably 2 parts by mass or more, and more preferably 5 parts by mass or more. Alternatively, it is preferably 20 parts by mass or less, and more preferably 15 parts by mass or less.

[0118] It should be noted that the content of a plasticizer also includes the amount of oil and the like contained in rubber (oil-extended rubber). (i) Oil

[0119] Examples of oil include mineral oil, synthetic oil, vegetable oil, animal oil, or mixtures thereof.

[0120] Examples of mineral oils include paraffinic, aromatic, and naphthenic oils, such as products from Idemitsu Kosan Co., Ltd., Sankyo Yuka Kogyo Co., Ltd., ENEOS Co., Ltd., Orisoi Co., Ltd., H&R Co., Ltd., Toyokuni Oil Co., Ltd., Showa Shell Sekiyu Co., Ltd., and Fuji Kosan Co., Ltd. These can be used alone or in combinations of two or more.

[0121] Furthermore, from the point of view of life cycle assessment, lubricating oil used in mixers and motors of rubber mixers, used cooking oil used in restaurants, etc., can be suitablely refined and used as these oils.

[0122] Examples of vegetable oils include linseed oil, rapeseed oil, safflower oil, soybean oil, corn oil, cottonseed oil, rice bran oil, tall oil, sesame oil, perilla oil, castor oil, tung oil, pine oil, pine tar oil, sunflower oil, coconut oil, palm oil, palm kernel oil, olive oil, camellia oil, jojoba oil, macadamia nut oil, peanut oil, grapeseed oil, and wood wax.

[0123] Furthermore, vegetable oils also include refined oils (salad oil, etc.) obtained by refining any of the oils mentioned above, transesterified oils obtained by transesterification, hydrogenated oils, thermopolymerized oils obtained by thermal polymerization, oxidized polymerized oils obtained by oxidation, used cooking oils recovered from edible oils, and the like. It should be noted that vegetable oils can be liquid or solid at room temperature (25°C). These can be used alone or in combinations of two or more.

[0124] As the vegetable oil, acylglycerol is preferred, and triacylglycerol is more preferred. Note that acylglycerol refers to a compound in which a hydroxy group of glycerin and a carboxylic acid form an ester bond. The acylglycerol is not particularly limited and may be 1-monoacylglycerol, 2-monoacylglycerol, 1,2-diacylglycerol, 1,3-diacylglycerol, or triacylglycerol. Furthermore, the acylglycerol may be a monomer, a dimer, a trimer, or more. Incidentally, the acylglycerol having a dimer or more can be obtained by thermal polymerization, oxidative polymerization, or the like. Furthermore, acylglycerol may be liquid or solid at room temperature (25°C).

[0125] The method for checking whether acylglycerol is contained in the rubber composition is not particularly limited, but it can be 1H-NMR measurement. For example, a rubber composition containing triacylglycerol is immersed in deuterated chloroform for 24 hours at room temperature (25 °C) to remove the rubber composition, and then 1 ¹H NMR measurements taken at room temperature show signals near 5.26 ppm, near 4.28 ppm, and near 4.15 ppm when the tetramethylsilane (TMS) signal is set to 0.00 ppm. Since these signals are presumed to originate from the hydrogen atom bonded to the carbon atom adjacent to the oxygen atom of the ester group, the acylglycerol content can be verified. It should be noted that "near" here refers to a range of 10.10 ppm.

[0126] It should be noted that the carboxylic acid is not particularly restricted and can be an unsaturated fatty acid or a saturated fatty acid. Examples of unsaturated fatty acids include monounsaturated fatty acids such as oleic acid and polyunsaturated fatty acids such as linoleic acid and linolenic acid.

[0127] As the vegetable oils, products commercially available from, for example, Idemitsu Kosan Co., Ltd., Sankyo Yuka Kogyo Co., Ltd., ENEOS Co., Ltd., Orisoi Co., Ltd., H&R Co., Ltd., Toyokuni Oil Co., Ltd., Fuji Kosan Co., Ltd. and Nisshin Oillio Group Co., Ltd. can be used. (ii) Liquid rubber

[0128] Liquid rubber is a polymer that is in a liquid state at room temperature (25 °C) and is a rubber component that can be extracted from a vulcanized tire by acetone extraction. Examples of liquid rubber include farnesene-based polymers, liquid diene polymers, and hydrogenated products thereof.

[0129] Farnesene-based polymer is a polymer obtained by polymerizing farnesene and has a structural unit based on farnesene. Farnesene includes isomers such as α-farnesene ((3E,7E)-3,7,11-trimethyl-1,3,6,10-dodecatetraene) and β-farnesene (7,11-dimethyl-3-methylene-1,6,10-dodecatriene).

[0130] The farnesen-based polymer can be a homopolymer of farnesen (farnesen homopolymer) or a copolymer of farnesen and a vinyl monomer (farnesen vinyl monomer copolymer).

[0131] Examples of liquid diene polymers include a liquid styrene-butadiene copolymer (liquid SBR), a liquid butadiene polymer (liquid BR), a liquid isoprene polymer (liquid IR), and a liquid styrene-isoprene copolymer (liquid SIR).

[0132] The liquid diene polymer has a polystyrene equivalent weight-average molecular weight (Mw), measured, for example, by gel permeation chromatography (GPC), of more than 1.0 × 10 3 and less than 2.0 × 10 5 Here, Mw of the liquid diene polymer is a polystyrene conversion value measured by gel permeation chromatography (GPC).

[0133] The liquid rubber content (total content of farnesene-based liquid polymer, liquid diene polymer, etc.) is, for example, preferably more than 1 part by mass and less than 50 parts by mass, based on 100 parts by mass of the rubber component in each rubber composition.

[0134] Liquid rubber can be supplied, for example, by products manufactured by Kuraray Co., Ltd., Clay Valley Co., Ltd., etc. (iii) Resin component

[0135] The resin component also acts as a tackifying agent and can be solid or liquid at room temperature. Specific examples of the resin component include rosin-based resin, styrene resin, coumaron-based resin, terpene resin, C5 resin, C9 resin, C5C9 resin, and acrylic resin, and two or more types can be used in combination. In each rubber composition, the content of the resin component is preferably more than 2 parts by mass and less than 45 parts by mass, and more preferably less than 30 parts by mass, based on 100 parts by mass of the rubber component.

[0136] Rosin-based resin is a resin whose main component is rosin acid, obtained by processing pine resin. This rosin-based resin (rosin) can be classified according to the presence or absence of modifications and can be categorized as unmodified rosin (unmodified rosin) and modified rosin (rosin derivative). Examples of unmodified rosin include tall rosin (also known as tallow rosin), balsam rosin, wood rosin, disproportionated rosin, polymerized rosin, hydrogenated rosin, and other chemically modified rosin.The modified rosin is a modified version of unmodified rosin, and examples thereof include rosin esters, unsaturated carboxylic acid modified rosin, unsaturated carboxylic acid modified rosin esters, amide compounds of rosin, and amine salts of rosin.

[0137] Styrene resin is a polymer that uses a styrene monomer as a monomer component, and examples include a polymer obtained by polymerizing a styrene monomer as a major component (50 wt% or more). In particular, it includes polymer homopolymers obtained by individual polymerization of styrene monomers (styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, α-methylstyrene, p-methoxystyrene, p-tert-butylstyrene, p-phenylstyrene, o-chlorostyrene, m-chlorostyrene, p-chlorostyrene, etc.), copolymers obtained by copolymerizing two or more of the styrene monomers, and, in addition, copolymers obtained by copolymerizing a styrene monomer and other monomers that can be copolymerized with the styrene monomer.

[0138] Examples of other monomers include acrylonitriles, such as acrylonitrile and methacrylate; unsaturated carboxylic acids, such as acrylic acid and methacrylic acid; unsaturated carboxylic acid esters, such as methyl acrylate and methyl methacrylate; dienes, such as chloroprene, butadiene, and isoprene; olefins, such as 1-butene and 1-pentene; α, β-unsaturated carboxylic acids and acid anhydrides thereof, such as maleic anhydride.

[0139] Among coumaron-based resins, coumaron-indene resin is preferred. Coumaron-indene resin is a resin containing coumaron and indene as monomer components that form the resin's skeleton (main chain). In addition to coumaron and indene, the skeleton may contain a monomer component such as styrene, α-methylstyrene, methylindene, or vinyltoluene.

[0140] The content of the coumaron indene resin in each rubber composition is, for example, preferably more than 1.0 parts by mass and less than 50.0 parts by mass, based on 100 parts by mass of the rubber component.

[0141] The hydroxyl value (OH value) of coumaron-indene resin, for example, is greater than 15 mg KOH / g and less than 150 mg KOH / g. The OH value is the amount of potassium hydroxide required to neutralize acetic acid bound to a hydroxyl group when 1 g of the resin is acetylated, and is expressed in milligrams. It is a value measured by a potentiometric titration method (JIS K 0070: 1992).

[0142] The softening point of coumaron-indene resin, for example, is higher than 30 °C and lower than 160 °C. The softening point is the temperature at which the sphere falls when the softening point, as defined in JIS K 6220-1: 2001, is measured using a ring-sphere softening point gauge.

[0143] Examples of terpene resins include polyterpenes, terpenophenols, and aromatically modified terpene resins. A polyterpene is a resin obtained by polymerizing a terpene compound and a hydrogenated product thereof. The terpene compound is a hydrocarbon with the composition (C5H8) n or an oxygen-containing derivative thereof, which is a compound that is a terpene, which is known as a monoterpene (C 10 H 16 ), Sesquiterpenes (C 15 H 24 ), Diterpenes (C 20 H 32) etc. is classified as having a basic skeleton. Examples include α-pinene, β-pinene, dipentene, limonene, myrcene, alloocimene, osimene, α-phellandrene, α-terpinene, γ-terpinene, terpinolene, 1,8-cineole, 1,4-cineole, α-terpineol, β-terpineol, and γ-terpineol.

[0144] Examples of polyterpenes include terpene resins, such as α-pinene resin, β-pinene resin, limonene resin, dipentene resin, and β-pinene / limonene resin, which are produced from the terpene compound mentioned above, as well as a hydrogenated terpene resin obtained by hydrogenating the terpene resin. Examples of terpene phenols include a resin obtained by copolymerizing the terpene compound and the phenol compound mentioned above, and a resin obtained by hydrogenating the resin mentioned above. In particular, a resin obtained by condensing the terpene compound, the phenol compound, and formalin mentioned above can be mentioned. Examples of phenol compounds include phenol, bisphenol A, cresol, and xylenol. Examples of aromatically modified terpene resin include a resin obtained by modifying a terpene resin with an aromatic compound, and a resin obtained by hydrogenating the aforementioned resin.The aromatic compound is not particularly restricted as long as it is a compound with an aromatic ring, and examples include phenolic compounds, such as phenol, alkylphenol, alkoxyphenol, and phenol containing an unsaturated hydrocarbon group; naphthol compounds, such as naphthol, alkylnaphthol, alkoxynaphthol, and naphthols containing an unsaturated hydrocarbon group; styrene derivatives, such as styrene, alkylstyrene, alkoxystyrene, and styrene containing an unsaturated hydrocarbon group; coumaron; and indene.

[0145] The term "C5 resin" refers to a resin obtained by polymerizing a C5 fraction. Examples of the C5 fraction include petroleum fractions with 4 to 5 carbon atoms, such as cyclopentadiene, pentene, pentadiene, and isoprene. A dicyclopentadiene resin (DCPD resin) is preferred as the C5-based petroleum resin.

[0146] The term "C9 resin" refers to a resin obtained by polymerizing a C9 fraction and may be hydrogenated or modified. Examples of the C9 fraction include petroleum fractions with 8 to 10 carbon atoms, such as vinyltoluene, alkylstyrene, indene, and methylindene. Specifically, a coumaron-indene resin, a coumaron resin, an indene resin, and an aromatic vinyl resin are preferred. For the vinyl-based aromatic resin, a homopolymer of α-methylstyrene (AMS resin) or styrene, or a copolymer of α-methylstyrene and styrene, is preferred because it is economical, easy to process, and provides excellent heat generation. A copolymer of α-methylstyrene and styrene is further preferred. Examples of commercially available vinyl-based aromatic resins include those from Clayton Co., Eastman Chemical Co., etc.

[0147] The term "C5C9 resin" refers to a resin obtained by polymerizing the C5 and C9 fractions and may be hydrogenated or modified. Examples of the C5 and C9 fractions include the petroleum fractions mentioned above. For example, those commercially available from Tosoh Corporation, LUHUA Co., etc., can be used as C5C9 resin.

[0148] Although the acrylic resin is not particularly restricted, a solvent-free acrylic resin can be used, for example.

[0149] As the solvent-free acrylic resin, a (meth)acrylic resin (polymer) synthesized by a high-temperature continuous polymerization method (high-temperature continuous lump polymerization method: a method described in US 4,414,370 B, JP 84-6207 A, JP 93-58805 A, JP 89-313522 A, US 5,010,166 B, Toagosei Synthetic Research Annual Report TREND2000 No. 3, pp. 42-45, and the like) without using polymerization initiators, chain transfer agents, organic solvents, etc. as auxiliary raw materials as much as possible can be mentioned. In the present invention, (meth)acrylic means methacrylic and acrylic.

[0150] Examples of the monomer component that forms the acrylic resin include (meth)acrylic acid and (meth)acrylic acid derivatives, such as (meth)acrylic acid esters (alkyl esters, aryl esters and aralkyl esters etc.), (meth)acrylamide and (meth)acrylamide derivatives.

[0151] Furthermore, aromatic vinyl compounds, such as styrene, α-methylstyrene, vinyltoluene, vinylnaphthalene, divinylbenzene, trivinylbenzene, divinylnaphthalene, and the like, can be used as the monomer component forming the acrylic resin, together with (meth)acrylic acid or (meth)acrylic acid derivatives.

[0152] The acrylic resin can be a resin composed solely of a (meth)acrylic component, or a resin that also contains a component other than the (meth)acrylic component. Furthermore, the acrylic resin can contain a hydroxyl group, a carboxyl group, a silanol group, or the like.

[0153] Examples of resin components that can be used include products from Maruzen Petrochemical Co., Ltd., Sumitomo Bakelite Co., Ltd., Yasuhara Chemical Co., Ltd., Tosoh Corporation, Rutgers Chemicals Co., Ltd., BASF Co., Ltd., Clayton Co., Ltd., Nitto Chemical Co., Ltd., Nippon Shokubai Co., Ltd., ENEOS Co., Ltd., Arakawa Chemical Industry Co., Ltd., Taoka Chemical Industry Co., Ltd., etc. (b-3) curable resin component

[0154] Each rubber composition preferably contains a curable resin component, such as a modified resorcinol resin or a modified phenolic resin, as a heat resistance enhancer to suppress changes in E* at high temperatures.

[0155] Specific examples of modified resorcinol resins include Sumikanol 620 (modified resorcinol resin), manufactured by Taoka Chemical Co., Ltd., and specific examples of modified phenolic resins include PR12686 (cashew nut oil modified phenolic resins), manufactured by Sumitomo Bakelite Co., Ltd.

[0156] The content of the curable resin component is, for example, preferably 1 part by mass or more, and more preferably 2 parts by mass or more, based on 100 parts by mass of the rubber component, from the viewpoint of sufficiently improving the complex elastic modulus and maintaining a large reaction force during deformation. On the other hand, from the viewpoint of maintaining fracture strength, the content is preferably 10 parts by mass or less, and more preferably 8 parts by mass or less.

[0157] When a modified resorcinol resin is used, it is preferred to also include a methylene donor as a curing agent. Examples of methylene donors include hexamethylenetetramine (HMT), hexamethoxymethylolmelamine (HMMM), and hexamethylolmelamine pentamethyl ether (HMMPME). It is preferably present in an amount of 5 parts by weight or more, and more preferably about 15 parts by weight. If too little is present, a sufficiently complex modulus may not be obtained. On the other hand, if the amount is too large, the viscosity of the rubber may increase, and processability may deteriorate.

[0158] As a specific methylene donor, for example, Sumikanol 507 manufactured by Taoka Chemical Industry Co., Ltd. can be used. (b-4) Lubricant (stearic acid)

[0159] Every rubber compound can also contain a lubricant. A lubricant based on a fatty acid derivative, such as stearic acid, is preferred. Conventionally known stearic acids can be used. In particular, stearic acids manufactured by NOF Corporation, Kao Corporation, Fujifilm Wako Pure Chemical Industries, Ltd., Chiba Fatty Acid Co., Ltd., etc., can be used. Furthermore, Structol WB16, manufactured by Structol Co., Ltd., and similar products can also be used.

[0160] For example, the content of stearic acid is preferably more than 0.5 parts by mass and less than 10.0 parts by mass based on 100 parts by mass of the rubber component. (b-5) Antioxidants

[0161] Every rubber compound can also contain an antioxidant. The antioxidant content can be, for example, more than 1 part by mass and less than 10 parts by mass, based on 100 parts by mass of the rubber component.

[0162] Examples of the antioxidant include naphthylamine-based antioxidants such as phenyl-α-naphthylamine; diphenylamine-based antioxidants such as octylated diphenylamine and 4,4'-bis(α,α'-dimethylbenzyl)diphenylamine; p-phenylenediamine-based antioxidants such as N-isopropyl-N'-phenyl-p-phenylenediamine, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, and N,N'-di-2-naphthyl-p-phenylenediamine; quinoline-based antioxidants such as a polymer of 2,2,4-trimethyl-1,2-dihydroquinoline; monophenolic antioxidants such as 2,6-di-t-butyl-4-methylphenol and styrenated phenol; and bis-, tris- or polyphenolic antioxidants, such as tetrakis[methylene-3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate]methane. These can be used alone or in combinations of two or more.

[0163] As specific antioxidants, for example, products manufactured by Seiko Chemical Co., Ltd., Sumitomo Chemical Co., Ltd., Ouchi Shinko Chemical Industry Co., Ltd., Flexsys Co., Ltd., etc. can be used. (b-6) Zinc oxide

[0164] Any rubber composition can contain zinc oxide. The zinc oxide content is, for example, more than 0.5 parts by mass and less than 10 parts by mass based on 100 parts by mass of the rubber component. Conventionally known zinc oxides can be used, such as products from Mitsui Mining & Smelting Co., Ltd., Toho Zinc Co., Ltd., Hakusui Tech Co., Ltd., Shodo Chemical Industry Co., Ltd., Sakai Chemical Industry Co., Ltd., etc. (b-7) Wax

[0165] Any rubber composition may contain wax. For example, the wax content is preferably 0.5 to 20 parts by mass, more preferably 1.0 to 15 parts by mass, and even more preferably 1.5 to 10 parts by mass, based on 100 parts by mass of the rubber component.

[0166] The wax is not particularly limited, and examples include petroleum waxes such as paraffin wax and microcrystalline wax; natural waxes such as vegetable waxes and animal waxes; and synthetic waxes such as polymers of ethylene or propylene. These can be used alone or in combinations of two or more.

[0167] The wax can be, for example, products manufactured by Ouchi Shinko Chemical Industry Co., Ltd., Nippon Seiro Co., Ltd. and Seiko Kagaku Co., Ltd. (b-8) Crosslinking agents and vulcanization accelerators

[0168] Every rubber composition preferably contains a crosslinking agent, such as sulfur. The crosslinking agent content is, for example, more than 0.1 parts by mass and less than 10.0 parts by mass, based on 100 parts by mass of the rubber component. It should be noted that the sulfur content refers to pure sulfur, and if insoluble sulfur is used, it refers to the content excluding the oil content.

[0169] Sulfur includes sulfur powder, precipitated sulfur, colloidal sulfur, insoluble sulfur, highly dispersed sulfur, soluble sulfur, and the like, commonly used in the rubber industry. These can be used alone or in combinations of two or more.

[0170] As the sulfur, for example, products manufactured by Tsurumi Chemical Industry Co., Ltd., Karuizawa Sulfur Co., Ltd., Shikoku Chemicals Corporation, Flexsys Co., Ltd., Nippon Kanryu Kogyo Co., Ltd., Hosoi Chemical Industry Co., Ltd., etc. can be used.

[0171] Crosslinking agents other than sulfur can be used. Specific examples of crosslinking agents other than sulfur include vulcanizing agents containing a sulfur atom, such as Tackirol V200 manufactured by Taoka Chemical Industry Co., Ltd., DURALINK HTS (1,6-hexamethylene sodium dithiosulfate dihydrate) manufactured by Flexsys Co., Ltd., and KA9188 (1,6-bis(N,N'-dibenzylthiocarbamoyldithio)hexane; (hybrid crosslinking agent)) manufactured by Lanxess Co., Ltd., and organic peroxides such as dicumyl peroxide.

[0172] Each rubber composition preferably contains a vulcanization accelerator. The content of the vulcanization accelerator is, for example, preferably more than 0.3 parts by mass and less than 10.0 parts by mass, based on 100 parts by mass of the rubber component.

[0173] Examples of vulcanization accelerators include thiazole-based vulcanization accelerators, such as 2-mercaptobenzothiazole, di-2-benzothiazolyl disulfide, and N-cyclohexyl-2-benzothiadylsulfenamide; thiuram-based vulcanization accelerators, such as tetramethylthiuram disulfide (TMTD), tetrabenzylthiuram disulfide (TBzTD), and tetrakis(2-ethylhexyl)thiuram disulfide (TOT-N); Sulfenamide-based vulcanization accelerators, such as N-cyclohexyl-2-benzothiazole sulfenamide, Nt-butyl-2-benzothiazolyl sulfenamide, N-oxyethylene-2-benzothiazole sulfenamide, N-oxyethylene-2-benzothiazole sulfenamide, and N,N'-diisopropyl-2-benzothiazole sulfenamide; and guanidine-based vulcanization accelerators, such as diphenylguanidine, diortho-tolylguanidine, and ortho-tolylbiguanidine. These can be used alone or in combinations of two or more. (b-9) Other

[0174] In addition to the components described above, each rubber compound may contain additives commonly used in the tire industry, such as organic fillers (e.g., cellulose fibers) and organic peroxides, as required. The content of these additives may be, for example, more than 0.1 parts by mass and less than 50 parts by mass, based on 100 parts by mass of the rubber component.

[0175] Furthermore, the loss tangent (tanδ) of any rubber composition can be adjusted by adjusting the amount of carbon black or sulfur, etc., so that the target loss tangent (tanδ) can be adjusted without the need for excessive trial and error.

[0176] The complex modulus of elasticity (E*) can be adjusted by modifying the amount of the curable resin component. Furthermore, the complex modulus of elasticity (E*) can also be adjusted by modifying the amount of carbon black or sulfur. In particular, the complex modulus of elasticity (E*) can be increased by increasing the amount of carbon black or sulfur. However, increasing the amount of carbon black increases the exothermicity, and increasing the amount of sulfur decreases the exothermicity. Therefore, it is preferable to first determine whether a curable resin component is to be used and its quantity, then to adjust the amount of sulfur, and finally to adjust the amount of carbon black. According to this procedure, a desired complex modulus of elasticity (E*) can be achieved without the need for excessive trial and error. (2) Preparation of each rubber composition

[0177] Each rubber composition is produced using a general method. For example, it can be produced by a production process comprising a basic kneading step in which the rubber component and a filler such as carbon black are kneaded, and a final kneading step in which the kneaded material obtained in the basic kneading step is kneaded with a crosslinking agent.

[0178] Kneading can be carried out using a known kneader (of the closed type), such as a Banbury mixer, a kneader or an open roll.

[0179] The kneading temperature of the basic kneading step is, for example, higher than 50 °C and lower than 200 °C, and the kneading time is, for example, more than 30 seconds and less than 30 minutes. In addition to the components mentioned above, bonding agents conventionally used in the rubber industry, such as plasticizers (e.g., oils), stearic acid, zinc oxide, antioxidants, waxes, and vulcanization accelerators, can be appropriately added and kneaded into the basic kneading process as needed.

[0180] In the final kneading step, the kneaded product obtained in the initial kneading step and the crosslinking agent are kneaded. The kneading temperature of the final kneading step is, for example, above room temperature and below 80°C, and the kneading time is, for example, longer than 1 minute and shorter than 15 minutes. In the final kneading step, in addition to the above components, a vulcanization accelerator, zinc oxide, etc., can be appropriately added and kneaded as needed.

[0181] The rubber composition for bead patch, the rubber composition for clinch, and the rubber composition for tread, obtained as described above, are then extruded into a predetermined shape to be formed into a bead patch, a clinch, and a tread, respectively. 3. Tire manufacturing

[0182] The tire according to this embodiment can be manufactured by a normal process except for embedding an electronic component during molding. First, each rubber composition obtained above is molded into a predetermined shape to produce a bead tread, a clinch, and a tread. Next, they are combined with other rubber elements on a tire molding machine to produce an unvulcanized tire.

[0183] Specifically, the inner liner (an element to ensure the tire's airtightness), the carcass (an element to withstand the load, impact, and inflation pressure received by the tire), and a belt element (an element to strongly tension the carcass, thus increasing the tread stiffness) are wound onto a forming drum. Both ends of the carcass are attached to both sidewalls, a bead section (an element to attach the tire to the rim) is positioned, and they are formed into a ring shape. Then, the tread is bonded in the center of the outer circumference, and the sidewall section is bonded radially to the outside to form a side panel, thus producing an unvulcanized tire. During this manufacturing process for unvulcanized tires, an electronic component is embedded in a predetermined position.

[0184] A tire is then produced by heating and pressurizing the unvulcanized tire, produced as described above, in a vulcanizing machine. The vulcanization process can be carried out using known vulcanizing agents. The vulcanization temperature is, for example, higher than 120 °C and lower than 200 °C, and the vulcanization time is, for example, longer than 5 minutes and shorter than 15 minutes.

[0185] As mentioned above, the tire described above incorporates an electronic component positioned between the bead ply and the carcass layer. This component reduces deformation during driving, thereby preventing detachment and damage to the electronic component within the tire. Furthermore, the product of the bead ply loss tangent and the length of the electronic component in the tire's circumferential direction is controlled to a specific value or less. This reduces heat generation in the bead ply and sufficiently suppresses detachment of the electronic component within the tire. Consequently, the durability of the tire with the electronic component is expected to be improved during driving.

[0186] The tires according to the present invention can be used as tires for passenger cars, tires for large passenger cars, tires for large SUVs, tires for trucks and buses, tires for two-wheeled vehicles, tires for competitions, studless tires (winter tires), all-season tires, and run-flat tires. They are particularly preferred as tires for passenger cars. [Example]

[0187] The following are examples that are considered preferred for implementation, but the scope of protection of the present invention is not limited to these examples.

[0188] Tires were produced consisting of a bead patch, a clinch, and a tread, manufactured according to the rubber compositions for bead patch, clinch, and tread based on Tables 1 to 3, and the various bonding materials shown below; and other rubber elements were also produced. The tires thus produced (tire sizes 205 / 55 R16, 195 / 65R15, and 155 / 60R16) are considered, and the results are shown in Tables 4 to 9. 1. Production of each rubber compound

[0189] A rubber compound for bead taper, a rubber compound for clinch, and a rubber compound for tread are manufactured using various bonding materials shown below. (1) Connecting materials (a) rubber component (a-1) NR: TSR20 (a-2) SBR: SBR1502, manufactured by ENEOS Materials (styrene content: 23.5 wt%, vinyl binding content: 16 wt%, non-oil-diluted) (a-3) BR: UBEPOL BR150B (Hicys-BR), manufactured by Ube Industries, Ltd. (Mw: 440,000, cis-1,4 binding content: 96 wt%) (b) Compound materials other than rubber components (b-1) Carbon black: DIABLACK N330, manufactured by Mitsubishi Chemical Corporation (Average particle size: 31 nm, CTAB: 78 m) 2 / g, N2SA: 79 m 2 / G) (b-2) Silicon dioxide: Ultrasil VN3, manufactured by Eponic Industries (N2SA: 175 m 2 / g, average primary particle diameter: 17 nm) (b-3) Silane coupling agent: Si266, manufactured by Eponic Industries (Bis(3-triethoxysilylpropyl) disulfide) (b-4) Oil: Viva Tec 500 (TDAE oil), manufactured by H&R Co., Ltd. (b-5) Thermosetting resin: PR12686, manufactured by Sumitomo Bakelite Co., Ltd. (Cashew nut oil-modified phenolic resin) (b-6) Resin: Petrotac 100V, manufactured by Tosoh Corporation (C5C9 petroleum resin, softening point 96 °C) (b-7) Stearic acid: Stearic acid “Tsubaki”, manufactured by NOF Corporation (b-8) Antioxidant-1: Nocrac 6C, manufactured by Ouchi Shinko Chemical Industry Co., Ltd. (N-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine) (b-9) Antioxidant-2: Nocrac RD, manufactured by Ouchi Shinko Chemical Industry Co., Ltd. (Poly(2,2,4-trimethyl-1,2-dihydroquinoline)) (b-10) Zinc oxide: 2 types of zinc oxide manufactured by Mitsui Mining & Smelting Co., Ltd. (b-11) Sulfur: Powdered sulfur manufactured by Karuizawa Sulfur Co., Ltd. (b-12) Accelerator: Nocrac-NS, manufactured by Ouchi Shinko Chemical Industry Co., Ltd. (N-tert-Butyl-2-benzothiazolylsulfenamide (TBBS)) (b-13) Curing agent: Sumikanol 507, manufactured by Taoka Chemical Industry Co., Ltd. (2) Production of rubber composition for bead tape

[0190] According to each formulation shown in Table 1, materials other than sulfur and the vulcanization accelerator are kneaded for 5 minutes at 150 °C using a Banbury mixer to obtain a kneaded product. Note that each compound amount is in parts by mass.

[0191] Next, sulfur and a vulcanization accelerator are added to the kneaded product and kneaded for 5 minutes at 80 °C using an open roll to obtain rubber compositions for bead taps from BA-1 to BA-8. [Table 1] material BA-1 BA-2 BA-3 BA-4 BA-5 BA-6 BA-7 BA-8 (Recipe) NR 80 80 80 80 80 80 80 80 SBR 20 20 20 20 20 20 20 20 soot 70 70 70 70 70 70 70 70 Öl 3 3 3 3 3 3 3 3 Thermosetting resin - 0,5 0,5 0,5 0,5 5 7 10 resin - 4 3 2 1 1 1 1 Stearic acid 2 2 2 2 2 2 2 2 zinc oxide 3,5 3,5 3,5 3,5 3,5 3,5 3,5 3,5 sulfur 1,5 1,5 1,5 1,5 1,5 1,5 1,5 1,5 accelerator 1,5 1,5 1,5 1,5 1,5 1,5 1,5 1,5 Hardener 1,0 0,5 0,5 0,5 0,5 1,0 1,1 1,2 (Physical properties) 70 °C-tanδ 0,22 0,25 0,20 0,18 0,15 0,15 0,15 0,15 70 °CE * (MPa) 12 11 13 14 15 21 21 32 (3) Preparation of rubber composition for clinch

[0192] In parallel, based on the recipes shown in Table 2, rubber compositions for Clinch CA-1 to CA-4 are obtained in the same way as the rubber compositions for Wulstapex. [Table 2] material CA-1 CA-2 CA-3 CA-4 (Recipe) NR 60 60 60 60 SBR 40 40 40 40 soot 55 55 55 55 Öl - 1 3 5 resin 12 8 4 0 Stearic acid 1,5 1,5 1,5 1,5 zinc oxide 3 3 3 3 sulfur 4,5 4,5 4,5 4,5 accelerator 1,2 1,2 1,2 1,2 (Physical properties) 70 °C-tanδ 0,22 0,20 0,18 0,10 70 °CE* (MPa) 10 12 13 14 (4) Preparation of rubber compound for tread

[0193] In parallel, based on each recipe shown in Table 3, rubber compositions for treads TR-1 to TR-3 are obtained in the same manner as in the production of rubber compositions for bead tapex. [Table 3] material TR-1 TR-2 TR-3 (Recipe) SBR 85 85 85 BR 15 15 15 soot 15 10 5 Silicon dioxide 50 55 65 Silane coupling agents 4 4,4 5,2 Öl 10 10 10 resin 10 12 15 Stearic acid 2 2 2 Antioxidant-1 2,5 2,5 2,5 Antioxidant-2 1 1 1 zinc oxide 2,5 2,5 2,5 sulfur 1,6 1,6 1,6 accelerator 2,5 2,5 2,5 (Physical properties) 30 °C-tanδ 0,25 0,20 0,15 0 °C tanδ 0,45 0,50 0,65 2. Forms of bead tape, clinch and running surface

[0194] Next, each rubber composition obtained above is formed into a bead patch, clinch, or tread of a predetermined shape.

[0195] Among the physical properties listed in Tables 1 to 3, 70 °C tanδ, 30 °C tanδ and 0 °C tanδ are determined by measuring a test piece cut from each tire to measure 20 mm in length × 4 mm in width × 1 mm in thickness, under conditions of a frequency of 10 Hz, an initial strain of 5%, a dynamic strain rate of 1%, a tensile deformation mode and accordingly at temperatures of 70 °C, 30 °C and 0 °C using GABO's "Eplexor (registered trademark)".

[0196] Furthermore, 70 °CE* is determined by measuring a test piece produced in the same manner as above under the conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial strain of 5%, a dynamic strain rate of 1% and a tensile deformation mode using GABO's "Eplexor (registered trademark)".

[0197] It should be noted that when manufacturing the test piece, its longitudinal direction is aligned with the circumferential direction. Furthermore, in the case of the tread, the thickness direction of the test piece is aligned with the radial direction of the tire, and in the cases of the bead tapex and clinches, the thickness direction is aligned with the width direction of the tire. If the thickness of any element is less than 1 mm, a test piece of a specific thickness must be taken from the thickest part of the element on the tire's equator plane. For example, if the thickness on the tire's equator plane is 0.5 mm, a test piece measuring 20 mm in length × 4 mm in width × 0.5 mm in thickness must be measured. 3. Tire manufacturing

[0198] Next, the bead tapex, clinch, and tread obtained above are bonded with other tire elements according to the combinations shown in Tables 4 to 9 to form an unvulcanized tire, and then a press vulcanization is carried out under conditions of 170 °C for 10 minutes to produce each test tire shown in Tables 4 to 9.

[0199] In the production of an unvulcanized tire, an electronic component (RFID) with the dimensions shown in Tables 4 to 9 (weight W (g) and longitudinal length (tire circumference length) L (mm)) is embedded in the embedding position shown in Tables 4 to 9. Prior to this, a plating layer containing copper and nickel has been formed on the surface of the electronic component, and a 0.5 mm thick rubber coating layer is applied.

[0200] In Tables 4 to 9, embedding position 1 indicates that the electronic component is embedded between the bead tape and the carcass layer on the inside in the tire width direction (see Fig. 1), Embedding position 2 indicates that the electronic component is embedded between the bead tape and the carcass layer on the outside in the tire width direction (see Fig. 2), Embedding position 3 indicates that the electronic component is embedded on the outside in the tire width direction and outside the carcass layer (see Fig. 4), and the embedding position 4 indicates that the electronic component is embedded on the outside in the tire width direction between the carcass layer and the sidewall section (see Fig. 5). 4. Calculation of parameters

[0201] Next, the tire weight (kg), cross-sectional height Ht (mm), and outer diameter Dt (mm) are measured for each test tire (which differs from the tire from which the test sample was taken), and the maximum load capacity (kg) is calculated based on these measurements. Additionally, the shortest distance D1 (mm) from the electronic component to the tire's outer surface and the tire radial distance D2 (mm) from the top of the bead core to the electronic component are measured, and (D2 / H) is calculated.

[0202] And 70 °C-tanδ-BA × L, tire weight / maximum load capacity, 70 °C-tanδ-BA × D2, (70 °C-tanδ-BA + 70 °C-tanδ-CA) × L, (70 °CE*-BA + 70 °CE*-CA) / L, 70 °CE*-BA / L, (70 °CE*-BA / 70 °CE*-CA) / L, 70 °CE*-BA / D2, D1 × W are calculated. 5. Performance evaluation test (evaluation of tire durability during driving)

[0203] After installing each test tire on all wheels of a vehicle (a domestic FF vehicle with a 2000 cc engine) and inflating them to an internal pressure of 230 kPa, the vehicle is driven on a test track under an overloaded condition. During the test, the vehicle repeatedly drives over road irregularities and behaves normally. The vehicle starts at a speed of 50 km / h and gradually increases the speed with each repetition. The speed immediately before the driver experiences any abnormality is recorded.

[0204] Next, the results for Comparative Example 1-1, Comparative Example 2-1, and Comparative Example 3-1 (referred to as "Comparative Example" in the formula below) are set to 100, and the results are indexed based on the formulas below to evaluate the tire's driving durability. The larger the value, the better the tire's driving durability. Tire durability while driving = [(results of test tires) / (results of comparison example)]×100 [Table 4] Example 1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-8 Tires Tire size 205 / 5 5R16 205 / 5 5R16 205 / 5 5R16 205 / 5 5R16 205 / 5 5R16 205 / 5 5R16 205 / 5 5R16 205 / 5 5R16 Tire weight (kg) 7,8 7,0 7,2 7,7 7,7 7,4 6,8 7,0 Cross-sectional height Ht (mm) 113 113 114 112 113 113 114 112 Outer diameter Dt (mm) 632 635 633 632 632 630 632 634 Maximum load capacity (kg) 515 522 517 515 515 510 515 519 Recipe Wulstapex (BA) BA-1 BA-2 BA-3 BA-3 BA-4 BA-5 BA-6 BA-7 Clinch (CA) CA-1 CA-1 CA-1 CA-2 CA-2 CA-1 CA-3 CA-3 Tread surface (TR) TR-1 TR-1 TR-2 TR-2 TR-2 TR-2 TR-2 TR-3 Physical properties 70 °C-tanδ-BA 0,22 0,25 0,20 0,20 0, 18 0,15 0,15 0,15 70 °CE*-BA (MPa) 12 11 13 13 14 15 21 21 70 °C-tanδ-CA 0,22 0,22 0,22 0,20 0,20 0,22 0, 18 0, 18 70 °CE*-CA (MPa) 10 10 10 12 12 10 13 13 30 °C-tanδ-TR 0,25 0,25 0,20 0,20 0,20 0,20 0,20 0,15 0 °C-tanδ-TR 0,45 0,45 0,50 0,50 0,50 0,50 0,50 0,65 Electronic components Embedding position 1 2 2 1 1 2 1 1 Weight W (g) 0,4 0,4 0,4 0,4 0,4 0,4 0,4 0,4 Tire circumference length L (mm) 65 55 60 65 60 60 55 55 Length (mm) 100 80 70 60 50 40 40 40 D2 / H 0,4 0,4 0,4 0,4 0,4 0,4 0,3 0,3 D1 (mm) 6,5 6,5 6,5 6,5 6,5 6,5 6,5 5,5 D2 (mm) 40 40 40 40 45 45 35 35 parameter 70 °C-tanδ-BA × L 14,30 13,75 12,00 13,00 10,80 9,00 8,25 8,25 Tire weight / maximum load capacity 0,0152 0,0134 0,0139 0,0150 0,0150 0,0145 0,0132 0,0135 70 °C-tanδ-BA × D2 8,80 10,00 8,00 8,00 8,10 6,75 5,25 5,25 (70 °C-tanδ-BA + 70 °C-tanδ-CA) × L 28,6 25,9 25,2 26,0 22,8 22,2 18,2 18,2 (70 °CE*-BA + 70 °CE*-CA) / L 0,34 0,38 0,38 0,38 0,43 0,42 0,62 0,62 70 °CE*-BA / L 0, 18 0,20 0,22 0,20 0,23 0,25 0,38 0,38 (70 °CE*-BA / 70 °CE*-CA) / L 0,02 0,02 0,02 0,02 0,02 0,03 0,03 0,03 70 °CE*-BA / D2 0,30 0,28 0,33 0,33 0,31 0,33 0,60 0,60 D1 × W 2,6 2,6 2,6 2,6 2,6 2,6 2,6 2,2 Evaluation results (durability of tires while driving) Results 120 125 130 125 130 130 135 140 [Table 5] Example Comparison example 1-9 1-10 1-1 1-2 1 1-3 1-4 1-5 1-6 Tires Tire size 205 / 5 5R16 205 / 5 5R16 205 / 5 5R16 205 / 5 5R16 205 / 5 5R16 205 / 5 5R16 205 / 55 R16 205 / 55 R16 Tire weight (kg) 7, 7 7, 6 7, 6 7, 7 7, 6 7, 5 7, 8 7, 8 Cross-sectional height Ht (mm) 113 113 114 114 112 113 113 113 Outer diameter Dt (mm) 633 632 634 634 633 633 632 632 Maximum load capacity (kg) 517 515 519 519 517 517 515 515 Recipe Wulstapex (BA) BA-8 BA-8 BA-7 BA-2 BA-2 BA-7 BA-8 BA-8 Clinch (CA) CA-4 CA-4 CA-2 CA-1 CA-1 CA-2 CA-2 CA-2 Tread surface (TR) TR-3 TR-3 TR-1 TR-1 TR-3 TR-1 TR-1 TR-1 Physical properties 70 °C-tanδ-BA 0,15 0,15 0,15 0,25 0,25 0,15 0,15 0,15 70 °CE*-BA (MPa) 32 32 21 11 11 21 32 32 70 °C-tanδ-CA 0,10 0,10 0,20 0,22 0,22 0,20 0,20 0,20 70 °CE*-CA (MPa) 14 14 12 10 10 12 12 12 30 °C-tanδ-TR 0,15 0,15 0,25 0,25 0,15 0,25 0,25 0,25 0 °C-tanδ-TR 0,65 0,65 0,45 0,45 0,65 0,45 0,45 0,45 Electronic components Embedding position 1 2 4 1 2 3 3 4 Weight W (g) 0, 4 0,4 0,4 0,4 0,4 0,4 0,4 0,4 Tire circumference L (mm) 55 55 60 60 60 70 60 55 Length (mm) 40 80 80 40 80 80 40 40 D2 / H 0,4 0,3 0,4 0,4 0,4 0,4 0,2 0,2 D1 (mm) 5, 5 5,5 6,0 6,5 6,5 8,0 7,0 7,0 D2 (mm) 40 35 40 40 40 40 25 25 parameter 70 °C-tanδ-BA × L 8,25 8,25 9,00 15,00 15,00 10,50 9,00 8,25 Tire weight / maximum load capacity 0,0149 0,0148 0,0146 0,0148 0,0147 0,0145 0,0151 0,0151 70 °C-tanδ-BA × D2 6,00 5,25 6,00 10,00 10,00 6,00 3,75 3,75 (70 °C-tanδ-BA + 70 °C-tanδ-CA) × L 13,8 13,8 21,0 28,2 28,2 24,5 21,0 19,3 (70 °CE*-BA + 70 °CE*-CA) / L 0,84 0,84 0,55 0,35 0,35 0,47 0,73 0, 80 70 °CE*-BA / L 0,58 0,58 0,35 0, 18 0, 18 0,30 0,53 0,58 (70 °CE*-BA / 70 °CE*-CA) / L 0,04 0,04 0,03 0,02 0,02 0,03 0,04 0,05 70 °CE*-BA / D2 0,80 0,91 0,53 0,28 0,28 0,53 1,28 1,28 D1 × W 2,2 2,2 2,4 2,6 2,6 3,2 2,8 2,8 Evaluation results (durability of tires while driving) Results 145 150 100 60 60 75 85 85 [Table 6] Example 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 Tires Tire size 195 / 6 5R15 195 / 6 5R15 195 / 6 5R15 195 / 6 5R15 195 / 6 5R15 195 / 65 R15 195 / 65 R15 195 / 65 R15 Tire weight (kg) 8,0 7,8 7,8 7,7 7,7 7,8 7,8 8,0 Cross-sectional height Ht (mm) 127 127 125 126 125 130 125 127 Outer diameter Dt (mm) 635 635 633 632 632 630 632 634 Maximum load capacity (kg) 534 535 530 528 528 524 528 533 Recipe Wulstapex (BA) BA-1 BA-3 BA-3 BA-3 BA-4 BA-5 BA-6 BA-7 Clinch (CA) CA-1 CA-1 CA-1 CA-2 CA-2 CA-1 CA-3 CA-3 Tread surface (TR) TR-1 TR-1 TR-2 TR-2 TR-2 TR-2 TR-2 TR-3 Physical properties 70 °C-tanδ-BA 0,22 0,20 0,20 0,20 0, 18 0,15 0,15 0,15 70 °CE*-BA (MPa) 12 13 13 13 14 15 21 21 70 °C-tanδ-CA 0,22 0,22 0,22 0,20 0,20 0,22 0, 18 0, 18 70 °CE*-CA (MPa) 10 10 10 12 12 10 13 13 30 °C-tanδ-TR 0,25 0,25 0,20 0,20 0,20 0,20 0,20 0,15 0 °C-tanδ-TR 0,45 0,45 0,50 0,50 0,50 0,50 0,50 0,65 Electronic components Embedding position 1 2 2 1 1 2 1 1 Weight W (g) 0, 4 0,4 0,4 0,4 0,4 0,4 0,4 0,4 Tire circumference L (mm) 65 65 60 55 65 65 55 55 Length (mm) 100 80 80 70 70 60 50 40 D2 / H 0,3 0,3 0,3 0,3 0,4 0,3 0, 3 0, 3 D1 (mm) 6, 5 6, 5 6, 5 6, 5 6, 5 6, 5 6,5 5,5 D2 (mm) 40 40 40 40 45 45 35 35 parameter 70 °C-tanδ-BA × L 14,30 13,00 12,00 11,00 11,70 9,75 8,25 8,25 Tire weight / maximum load capacity 0,0150 0,0146 0,0147 0,0146 0,0146 0,0149 0,0148 0, 0150 70 °C-tanδ-BA × D2 8,80 8,00 8,00 8,00 8,10 6,75 5,25 5,25 (70 °C-tanδ-BA + 70 °C-tanδ-CA) × L 28,6 27,3 25,2 22,0 24,7 24,1 18,2 18,2 (70 °CE*-BA + 70 °CE*-CA) / L 0,34 0,35 0,38 0,45 0,40 0,38 0,62 0,62 70 °CE*-BA / L 0, 18 0,20 0,22 0,24 0,22 0,23 0,38 0,38 (70 °CE*-BA / 70 °CE*-CA) / L 0,02 0,02 0,02 0,02 0,02 0,02 0,03 0,03 70 °CE*-BA / D2 0,30 0,33 0,33 0,33 0,31 0,33 0,60 0,60 D1 × W 2,6 2,6 2,6 2,6 2,6 2,6 2,6 2,2 Evaluation results (durability of tires while driving) Results 120 125 125 130 130 135 140 140 [Table 7] Example comparison example 2-9 2-10 2-1 2-2 2-3 2-4 2-5 2-6 Tires Tire size 195 / 6 5R15 195 / 6 5R15 195 / 6 5R15 195 / 6 5R15 195 / 6 5R15 195 / 6 5R15 195 / 6 5R15 195 / 6 5R15 Tire weight (kg) 7, 7 7, 6 7, 9 7, 7 7, 6 7, 7 7, 9 8, 0 Cross-sectional height Ht (mm) 128 128 127 129 127 128 127 125 Outer diameter Dt (mm) 633 632 634 634 633 633 632 632 Maximum load capacity (kg) 530 528 533 533 530 530 528 528 Recipe Wulstapex (BA) BA-8 BA-8 BA-7 BA-2 BA-2 BA-7 BA-8 BA-8 Clinch (CA) CA-4 CA-4 CA-2 CA-1 CA-1 CA-2 CA-2 CA-2 Tread surface (TR) TR-3 TR-3 TR-1 TR-1 TR-3 TR-1 TR-1 TR-1 Physical properties 70 °C-tanδ-BA 0,15 0,15 0,15 0,25 0,25 0,15 0,15 0,15 70 °CE*-BA (MPa) 32 32 21 11 11 21 32 32 70 °C-tanδ-CA 0,10 0,10 0,20 0,22 0,22 0,20 0,20 0,20 70 °CE*-CA (MPa) 10,00 10,00 12,00 10,00 10,00 12,00 12,00 12,00 30 °C-tanδ-TR 0,15 0,15 0,25 0,25 0,15 0,25 0,25 0,25 0 °C-tanδ-TR 0,65 0,65 0,45 0,45 0,65 0,45 0,45 0,45 Electronic components Embedding position 1 2 4 1 2 3 3 4 Weight W (g) 0, 4 0,4 0,4 0,4 0,4 0,4 0,4 0,4 Tire circumference L (mm) 55 50 70 65 60 55 60 70 Length (mm) 40 40 80 40 80 40 80 40 D2 / H 0,3 0,3 0,3 0,3 0,3 0,3 0,2 0,2 D1 (mm) 5, 5 5,5 6,0 6,5 6,5 8,0 7,0 7,0 D2 (mm) 40 35 40 40 40 40 25 25 parameter 70 °C-tanδ-BA × L 8,25 7,50 10,50 16,25 15,00 8,25 9,00 10,50 Tire weight / maximum load capacity 0,0145 0,0144 0,0148 0,0145 0,0143 0,0145 0,0150 0,0151 70 °C-tanδ-BA × D2 6,00 5,25 6,00 10,00 10,00 6,00 3,75 3,75 (70 °C-tanδ-BA + 70 °C-tanδ-CA) × L 13,8 12,5 24,5 30,6 28,2 19,3 21,0 24,5 (70 °CE*-BA + 70 °CE*-CA) / L 0,84 0,92 0,47 0,32 0,35 0,60 0,73 0,63 70 °CE*-BA / L 0,58 0,64 0,30 0,17 0,18 0,38 0,53 0,46 (70 °CE*-BA / 70 °CE*-CA) / L 0,04 0,05 0,03 0,02 0,02 0,03 0,04 0,04 70 °CE*-BA / D2 0,80 0,91 0,53 0,28 0,28 0,53 1,28 1,28 D1 × W 2,2 2,2 2,4 2,6 2,6 3,2 2,8 2,8 Evaluation results (durability of tires while driving) Results 145 150 100 60 60 75 85 85 [Table 8] Example 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 Tires Tire size 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 Tire weight (kg) 5, 3 5,3 5,2 5,1 5,0 5,1 5,2 5,3 Cross-sectional height Ht (mm) 93 93 92 92 94 93 95 94 Outer diameter Dt (mm) 592 594 593 592 592 590 592 594 Maximum load capacity (kg) 349 351 350 348 348 345 348 351 Recipe Wulstapex (BA) BA-1 BA-3 BA-3 BA-3 BA-4 BA-5 BA-6 BA-7 Clinch (CA) CA-1 CA-1 CA-1 CA-2 CA-2 CA-1 CA-3 CA-3 Tread surface (TR) TR-1 TR-1 TR-2 TR-2 TR-2 TR-2 TR-2 TR-3 Physical properties 70 °C-tanδ-BA 0,22 0,20 0,20 0,20 0, 18 0,15 0,15 0,15 70 °CE*-BA (MPa) 12 13 13 13 14 15 21 21 70 °C-tanδ-CA 0,22 0,22 0,22 0,20 0,20 0,22 0, 18 0, 18 70 °CE*-CA (MPa) 10 10 10 12 12 10 13 13 30 °C-tanδ-TR 0,25 0,25 0,20 0,20 0,20 0,20 0,20 0,15 0 °C-tanδ-TR 0,45 0,45 0,50 0,50 0,50 0,50 0,50 0,65 Electronic components Embedding position 1 2 2 1 1 2 1 1 Weight W (g) 0,4 0,4 0,4 0,4 0,4 0,4 0,4 0,4 Tire circumference length L (mm) 65 65 60 55 65 65 55 55 Length (mm) 100 80 80 70 70 60 50 40 D2 / H 0,4 0,4 0,4 0,4 0,4 0,4 0,3 0,3 D1 (mm) 6,5 6,5 6,5 6,5 6,5 6,5 6,5 5,5 D2 (mm) 40 40 40 40 45 45 35 35 parameter 70 °C-tanδ-BA × L 14,30 13,00 12,00 11,00 11,70 9,75 8,25 8,25 Tire weight / maximum load capacity 0,0152 0,0151 0,0149 0,0146 0,0144 0,0148 0,0149 0,0151 70 °C-tanδ-BA × D2 8,80 8,00 8,00 8,00 8,10 6,75 5,25 5,25 (70 °C-tanδ-BA + 70 °C-tanδ-CA) × L 28,6 27,3 25,2 22,0 24,7 24,1 18,2 18,2 (70 °CE*-BA + 70 °CE*-CA) / L 0,34 0,35 0,38 0,45 0,40 0,38 0,62 0,62 70 °CE*-BA / L 0, 18 0,20 0,22 0,24 0,22 0,23 0,38 0,38 (70 °CE*-BA / 70 °CE*-CA) / L 0,02 0,02 0,02 0,02 0,02 0,02 0,03 0,03 70 °CE*-BA / D2 0,30 0,33 0,33 0,33 0,31 0,33 0,60 0,60 D1 × W 2,6 2,6 2,6 2,6 2,6 2,6 2,6 2,2 Evaluation results (tire durability during driving) Results 120 125 130 135 135 135 140 140 [Table 9] Example Comparison example 3-9 3-10 3-1 3-2 3-3 3-4 3-5 3-6 Tires Tire size 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 155 / 6 0R16 Tire weight (kg) 5,2 5,1 5,2 5,3 5,2 5,2 5,2 5,3 Cross-sectional height Ht (mm) 93 93 92 93 92 93 95 95 Outer diameter Dt (mm) 593 592 594 594 593 593 592 592 Maximum load capacity (kg) 350 348 351 351 350 350 348 348 Recipe Wulstapex (BA) BA-8 BA-8 BA-7 BA-2 BA-2 BA-7 BA-8 BA-8 Clinch (CA) CA-4 CA-4 CA-2 CA-1 CA-1 CA-2 CA-2 CA-2 Tread surface (TR) TR-3 TR-3 TR-1 TR-1 TR-3 TR-1 TR-1 TR-1 Physical properties 70 °C-tanδ-BA 0,15 0,15 0,15 0,25 0,25 0,15 0,15 0,15 70 °CE*-BA (MPa) 32 32 21 11 11 21 32 32 70 °C-tanδ-CA 0,10 0,10 0,20 0,22 0,22 0,20 0,20 0,20 70 °CE*-CA (MPa) 14 14 12 10 10 12 12 12 30 °C-tanδ-TR 0,15 0,15 0,25 0,25 0,15 0,25 0,25 0,25 0 °C-tanδ-TR 0,65 0,65 0,45 0,45 0,65 0,45 0,45 0,45 Electronic components Embedding position 1 2 4 1 2 3 3 4 Weight W (g) 0,4 0,4 0,4 0,4 0,4 0,4 0,4 0,4 Tire circumference length L (mm) 55 50 70 65 60 55 60 70 Length (mm) 40 40 80 40 80 40 80 40 D2 / H 0,4 0,3 0,4 0,4 0,4 0,4 0,2 0, 3 D1 (mm) 5, 5 5,5 6,0 6,5 6,5 8, 0 7,0 7,0 D2 (mm) 40 35 40 40 40 40 25 30 parameter 70 °C-tanδ-BA × L 8,25 7,50 10,50 16,25 15,00 8,25 9,00 10,50 Tire weight / maximum load capacity 0,0149 0,0146 0,0148 0, 0151 0,0149 0,0149 0,0149 0,0152 70 °C-tanδ-BA × D2 6,00 5,25 6,00 10,00 10,00 6,00 3,75 4,50 (70 °C-tanδ-BA + 70 °C-tanδ-CA) × L 13,8 12,5 24,5 30,6 28,2 19,3 21,0 24,5 (70 °CE*-BA + 70 °CE*-CA) / L 0,62 0,84 0,92 0,47 0,32 0,35 0,60 0,73 70 °CE*-BA / L 0,38 0,58 0,64 0,30 0,17 0, 18 0,38 0,53 (70 °CE*-BA / 70 °CE*-CA) / L 0,03 0,04 0,05 0,03 0,02 0,02 0,03 0,04 70 °CE*-BA / D2 0,60 0,80 0,91 0,53 0,28 0,28 0,53 1,28 D1 × W 2,2 2,2 2,4 2,6 2,6 3,2 2,8 2,8 Evaluation results (durability of tires while driving) Results 145 150 100 60 65 75 85 85

[0205] Although the present invention has been described above based on the embodiments described above, the present invention is not limited to these embodiments. Various modifications can be made to the embodiments described above within the same and equivalent scope of protection of the present invention.

[0206] The present invention (1) is a tire comprising a tread section, a bead section consisting of a bead tape and a bead core, and a carcass layer, wherein an electronic component is provided between the bead tapex and the carcass layer; and Loss tangent 70 °C-tanδ-BA of the bead tapex, which is measured under the conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial strain of 5 %, a dynamic strain rate of 1 %, and tensile deformation mode, and a length L (mm) of the electronic component in the tire circumferential direction satisfy the following (formula 1). 70 °C−tanδ−BA×L<15

[0207] The present invention (2) is the tire according to the present invention (1), wherein the 70 °C tanδ BA and the circumferential length L (mm) of the tire satisfy the following (Formula 2). 70 °C−tanδ−BA×L≦13

[0208] The present invention (3) is the tire according to the present invention (2), wherein the 70 °C tanδ BA and the circumferential length L (mm) of the tire satisfy the following (Formula 3). 70 °C−tanδ−BA×L≦10

[0209] The present invention (4) is the tire of a combination of the present inventions (1) to (3), wherein the loss tangent 30 °C-tanδ-TR of the tread section, measured under the conditions of a temperature of 30 °C, a frequency of 10 Hz, an initial elongation of 5%, a dynamic strain rate of 1% and tensile deformation mode, is less than 0.25.

[0210] The present invention (5) is the tire according to the present invention (4), wherein the loss tangent 0 °C-tanδ-TR of the tread section, measured under the conditions of a temperature of 0 °C, a frequency of 10 Hz, an initial elongation of 5%, a dynamic strain rate of 1% and tensile deformation mode, is greater than 0.50.

[0211] The present invention (6) is the tire of a combination of the present inventions (1) to (5), wherein the tire weight (kg) and the maximum load capacity (kg) of the tire satisfy the following (formula 4). Tire weight / maximum load capacity <0.0150

[0212] The present invention (7) is the tire of a combination of the present inventions (1) to (6), wherein the 70 °C-tanδ-BA and the tire radial distance D2 (mm) from the top end of the bead core to the electronic component satisfy the following (Formula 5). 70 °C−tanδ−BA×D2≦8.5

[0213] The present invention (8) is the tire of a combination of the present inventions (1) to (7), wherein a clinch on the outside in the tire width direction from the bead section; and the 70 °C tanδ-BA, loss tangent 70 °C tanδ-CA of the clinch, measured under the conditions of temperature 70 °C, frequency 10 Hz, initial strain 5%, dynamic strain rate 1% and tensile deformation mode, and the circumferential length L (mm) of the tire satisfy the following (Formula 6). (70 °C−tanδ−BA+70 °C−tanδ−CA)×L≦25

[0214] The present invention (9) is the tire of a combination of the present inventions (1) to (8), wherein a clinch is provided on the outer side in the tire width direction of the bead portion; and complex elastic modulus 70 °CE*-BA (MPa) of the bead apex, measured under the conditions of temperature 70 °C, frequency 10 Hz, initial strain 5%, dynamic strain rate 1%, and tensile deformation mode, complex elastic modulus 70 °CE*-CA (MPa) of the clinch, measured under the conditions of temperature 70 °C, frequency 10 Hz, initial strain 5%, dynamic strain rate 1%, and tensile deformation mode, and The circumference L (mm) of the tire must satisfy the following (Formula 7). (70 °C−E*−BA+70 °C−E*−CA) / L≧0.5

[0215] The present invention (10) is the tire of a combination of the present inventions (1) to (9), wherein a complex elastic modulus 70 °CE*-BA (MPa) of the bead tread measured under the conditions of temperature 70 °C, frequency of 10 Hz, initial strain 5%, dynamic strain rate 1% and tensile deformation mode, and the circumferential length L (mm) of the tire shall satisfy the following (Formula 8). 70 °C−E*−BA / L≧0.5

[0216] The present invention (11) is the tire of a combination of the present inventions (1) to (10), wherein a clinch is provided on the outside in the tire width direction of the bead section; and complex modulus of elasticity 70 °CE*-BA (MPa) of the bead tapex, measured under the conditions of temperature 70 °C, frequency 10 Hz, initial elongation 5%, dynamic strain rate 1% and tensile deformation mode, and complex modulus of elasticity 70 °CE*-CA (MPa) of the clinch, measured under the conditions of temperature 70 °C, frequency 10 Hz, initial elongation 5%, dynamic strain rate 1% and tensile deformation mode, and The circumference L (mm) of the tire must satisfy the following (Formula 9). (70 °C−E*−BA / 70 °C−E*−CA) / L≧0.05

[0217] The present invention (12) is the tire of a combination of the present inventions (1) to (11), wherein complex elastic modulus 70 °CE*-BA (MPa) of the bead tapex, the measured under the conditions of temperature 70 °C, frequency 10 Hz, initial strain 5%, dynamic strain rate of 1% and tensile deformation mode, and The tire radial distance D2 (mm) from the upper end of the bead core to the electronic component must satisfy the following (Formula 10). 70 °C−E*−BA / D2>0.85

[0218] The present invention (13) is the tire of a combination of the present inventions (1) to (12), wherein the electronic component is an RFID tag or a sensor.

[0219] The present invention (14) is the tire of a combination of the present inventions (1) to (13), wherein an adhesive layer or a plating layer is provided on the surface of the electronic component to improve adhesion to rubber.

[0220] The present invention (15) is the tire of a combination of the present inventions (1) to (14), wherein a coating layer for electronic component with a thickness of 0.5 mm or more is provided such that it covers the electronic component.

[0221] The present invention (16) is the tire of a combination of the present inventions (1) to (15), wherein a distance H (mm) from the upper end of the bead core to the apex of the bead tapex and the tire radial distance D2 (mm) from the upper end of the bead core to the electronic component satisfy the following (formula 11). 0.2<(D2 / H)<0.8

[0222] The present invention (17) is the tire of a combination of the present inventions (1) to (16), wherein the weight W (g) of the electronic component and the shortest distance D1 (mm) from the electronic component to the outer surface of the tire satisfy the following (formula 12). D1×W≦2.5

[0223] The present invention (18) is the tire of a combination of the present inventions (1) to (17), wherein the length of the electronic component in the longitudinal direction is 80 mm or less.

[0224] The present invention (19) is the tire according to the present invention (18), wherein the length of the electronic component in the longitudinal direction is 50 mm or less. [Description of reference symbols] 1 tire 2 bead section 3 Side wall section 4. Tread section 21 bead core 22 Bead Tape 23 Clinch 24 bead tape 31 Side wall 32 Carcass layers 33 Innerliner 34 electronic components 34a Main body 34b antenna D1 shortest distance D2 tire radial spacing H distance L Length of electronic component in longitudinal direction QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2021-506676 A

[0002] JP 2021-514891 A

[0002] JP 2021-084510 A

[0002] JP 2021-127114 A

[0002] US 4,414,370 B

[0149] JP 84-6207 A

[0149] JP 93-58805 A

[0149] US 5,010,166 B

[0149] Cited non-patent literature

[0000] JIS K 0070: 1992

[0141] JIS K 6220-1: 2001

[0142] Toagosei Synthetic Research Annual Report TREND2000 Nr. 3, S. 42-45

[0149]

Claims

[1] A tire comprising a tread portion, a bead portion composed of a bead tread and a bead core, and a carcass layer, wherein an electronic component is provided between the bead tread and the carcass layer; and a loss tangent 70 °C-tanδ-BA of the bead tread measured under conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial strain of 5%, a dynamic strain rate of 1%, and tensile deformation mode, and a length L (mm) of the electronic component in a tire circumferential direction satisfy the following (Formula 1): 70°C−tanδ−BA×L<15 [2] The tire according to claim 1, wherein the 70 °C tanδ BA and the length L (mm) in the tire circumferential direction satisfy the following (Formula 2): 70°C−tanδ−BA×L≦13 [3] The tire according to claim 2, wherein the 70 °C tanδ BA and the length L (mm) in the tire circumferential direction satisfy the following (Formula 3): 70°C−tanδ−BA×L≦10 [4] A tire according to any one of claims 1 to 3, wherein a loss tangent 30°C-tanδ-TR of the tread portion measured under conditions of a temperature of 30°C, a frequency of 10 Hz, an initial strain of 5%, a dynamic strain rate of 1% and tensile deformation mode is less than 0.

25. [5] The tire according to claim 4, wherein a loss tangent 0°C-tanδ-TR of the tread portion measured under conditions of a temperature of 0°C, a frequency of 10 Hz, an initial strain of 5%, a dynamic strain rate of 1%, and tensile deformation mode is more than 0.

50. [6] A tire according to any one of claims 1 to 5, wherein a tire weight (kg) and a maximum load capacity (kg) of the tire satisfy the following (Formula 4): Tire weight / maximum load capacity<0.0150 [7] A tire according to any one of claims 1 to 6, wherein the 70 °C tanδ BA and a tire radial distance D2 (mm) from an upper end of the bead core to the electronic component satisfy the following (Formula 5): 70°C−tanδ−BA×D2≦8.5 [8] A tire according to any one of claims 1 to 7, wherein a clinch is provided with respect to the bead portion on an outer side in a tire width direction; and the 70 °C tanδ BA, a loss tangent 70 °C-tanδ-CA of the clinch, measured under conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial strain of 5%, a dynamic strain rate of 1% and tensile deformation mode, and the length L (mm) in the tire circumferential direction must satisfy the following (Formula 6): (70°C−tanδ−BA+70°C−tanδ−CA)×L≦25 [9] A tire according to any one of claims 1 to 8, wherein a clinch is provided with respect to the bead portion on an outer side in a tire width direction; and a complex elastic modulus 70 °CE*-BA (MPa) of the bead tapex, which is obtained under conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial strain of 5%, a dynamic strain rate of 1% and tensile deformation mode, a complex elastic modulus 70 °CE*-CA (MPa) of the clinch, measured under conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial strain of 5%, a dynamic strain rate of 1% and tensile deformation mode, and the length L (mm) in the tire circumferential direction must satisfy the following (Formula 7): (70°C−E*−BA+70°C−E*−CA) / L≧0.5 [10] A tire according to any one of claims 1 to 9, wherein a complex elastic modulus 70 °CE*-BA (MPa) of the bead apex measured under conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial elongation of 5%, a dynamic elongation rate of 1% and tensile deformation mode, and the length L (mm) in the tire circumferential direction satisfy the following (Formula 8): 70°C−E*−BA / L≧0.5 [11] A tire according to any one of claims 1 to 10, wherein a clinch is provided with respect to the bead portion on an outer side in a tire width direction; and a complex elastic modulus 70 °CE*-BA (MPa) of the bead tapex, which is obtained under conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial strain of 5%, a dynamic strain rate of 1% and tensile deformation mode, a complex elastic modulus 70 °CE*-CA (MPa) of the clinch, which is obtained under conditions of temperature of 70 °C, a frequency of 10 Hz, an initial strain of 5%, a dynamic strain rate of 1% and tensile deformation mode, and the length L (mm) in the tire circumferential direction must satisfy the following (Formula 9): (70°C−E*−BA / 70°C−E*−CA) / L≧0.05 [12] A tire according to any one of claims 1 to 11, wherein a complex elastic modulus 70 °CE*-BA (MPa) of the bead apex measured under conditions of a temperature of 70 °C, a frequency of 10 Hz, an initial strain of 5%, a dynamic strain rate of 1% and tensile deformation mode, and a tire radial distance D2 (mm) from an upper end of the bead core to the electronic component shall satisfy the following (Formula 10): 70°C−E*−BA / D2>0.85 [13] Tire according to one of claims 1 to 12, wherein the electronic component is an RFID tag or a sensor. [14] A tire according to any one of claims 1 to 13, wherein an adhesive layer or a plating layer for improving adhesion to rubber is provided on a surface of the electronic component. [15] A tire according to any one of claims 1 to 14, wherein an electronic component coating layer having a thickness of 0.5 mm or more covering the electronic component is provided. [16] A tire according to any one of claims 1 to 15, wherein a distance H (mm) from an upper end of the bead core to a vertex of the bead apex and a tire radial distance D2 (mm) from the upper end of the bead core to the electronic component satisfy the following (Formula 11): 0.2<(D2 / H)<0.8 [17] A tire according to any one of claims 1 to 16, wherein a weight W (g) of the electronic component and a shortest distance D1 (mm) from the electronic component to a tire outer surface satisfy the following (Formula 12): D1×W≦2.5 [18] A tire according to any one of claims 1 to 17, wherein a length of the electronic component in a longitudinal direction is 80 mm or less. [19] A tire according to claim 18, wherein the length of the electronic component in the longitudinal direction is 50 mm or less.

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