KR102414422B1 - Tire comprising a carbon fiber spun yarn and method for manufacturing the same - Google Patents

Abstract

A tire including a carbon fiber spun yarn capable of effectively dissipating static electricity and simultaneously achieving an effect of improving fuel efficiency through low rolling resistance is provided. A tire according to the present invention is a tire including a tread portion, a bead portion and a sidewall portion, wherein the tire includes a belt disposed inside the tread portion, disposed under the belt, and disposed up to the sidewall portion and the bead portion and a first carbon fiber spun yarn extending along a first surface of the carcass.

Description

Tire including carbon fiber spun yarn and manufacturing method thereof

The present invention relates to a tire including carbon fiber spun yarn, and more particularly, to a tire comprising carbon fiber spun yarn, which can effectively discharge static electricity aggregated in the tire and simultaneously achieve an effect of improving fuel efficiency through low rolling resistance; It relates to a manufacturing method thereof.

In the past, carbon-based rubber compositions did not have a significant problem with respect to static electricity, but the application of high-loading silica rubber compositions is increasing as the performance required for traction and fuel economy reduction of vehicles increases. A rubber composition with a high silica content has a problem in dissipating static electricity to the road surface.

As a method for discharging static electricity from a tire having such a low rolling resistance (LRR) to the road surface, the development of an electrically conductive LRR sidewall compound or LRR carcass compound may be considered. However, the reality is that it is very difficult to develop an LRR compound having a resistance value of less than 100MΩ at 1000V, which is the level required by automobile manufacturers.

In particular, since the effect of the rotational resistance of the existing sidewall compound is large, when a compound with low rotational resistance characteristics is used while giving up the conductivity, it is a general solution to provide conductivity to the carcass compound. However, in order to impart conductivity to the carcass compound, it is necessary to use carbon black, which is a direction in which conductivity is increased and the strength or modulus of rubber is increased. However, when carbon black is used, processing of the compound may be difficult because it is disadvantageous to heat generation during rolling processing, and if carbon with a more developed structure is used to obtain conductivity, processability may be disadvantageous.

Therefore, research on a compound that simultaneously satisfies LRR performance and electrical conductivity, which corresponds to a trade-off relationship, in which one performance is improved, deteriorates another performance, is continuously being conducted.

It is an object of the present invention to provide a tire capable of effectively discharging static electricity aggregated in the tire by attaching carbon fiber spun yarn to the surface of a rolled carcass product, and simultaneously achieving an effect of improving fuel efficiency through low rolling resistance.

Another object of the present invention is to provide a method for manufacturing a tire that can effectively discharge static electricity that is aggregated in a tire by attaching carbon fiber spun yarn to the surface of a rolled carcass product, and can simultaneously achieve an effect of improving fuel efficiency through low rolling resistance. it's about

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by the examples of the present invention. Moreover, it will be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations thereof indicated in the appended claims.

A tire according to the present invention for achieving the above object is a tire including a tread portion, a bead portion and a sidewall portion, wherein the tire includes a belt disposed inside the tread portion, and a belt disposed under the belt and the sidewall portion and a first carbon fiber spun yarn including a carcass disposed up to the bead portion and extending along a first surface of the carcass.

According to a method of manufacturing a tire according to the present invention for achieving the above object, an Oxi-PAN fiber generated in a process of oxidizing a PAN fiber is provided, the Oxi-PAN fiber is spun, and a carbon fiber spun yarn is produced through a carbonization process. In one embodiment, the carbon fiber spun yarn is attached to the first surface of the carcass in one of a rolling process of rolling the carcass and a cutting process of cutting the carcass.

It is an object of the present invention to provide a tire capable of effectively discharging static electricity aggregated in the tire by attaching carbon fiber spun yarn to the surface of a rolled carcass product, and simultaneously achieving an effect of improving fuel efficiency through low rolling resistance.

Another object of the present invention is to provide a method for manufacturing a tire capable of effectively discharging static electricity aggregated in a tire by attaching carbon fiber spun yarn to the surface of a rolled carcass product, and simultaneously achieving an effect of improving fuel efficiency through low rolling resistance. it's about

In addition to the above-described effects, the specific effects of the present invention will be described together while explaining the specific contents for carrying out the invention below.

1 is a half cross-sectional view of a tire including carbon fiber spun yarn in accordance with some embodiments.
2 is a half cross-sectional view of a tire including carbon fiber spun yarn in accordance with some embodiments.

Hereinafter, each configuration of the present invention will be described in more detail so that those of ordinary skill in the art to which the present invention pertains can easily carry out, but this is only an example, and the scope of the present invention is defined by the following contents Not limited.

A tire according to the present invention is a tire including a tread portion, a sidewall portion and a bead portion, wherein the tire comprises a belt disposed inside the tread portion, and a carcass disposed under the belt and disposed up to the sidewall portion and the bead portion. and a first carbon fiber spun yarn extending along the first surface of the carcass.

Hereinafter, the configuration of the present invention will be described with reference to the drawings.

1 is a half cross-sectional view of a tire including carbon fiber spun yarn in accordance with some embodiments.

Referring to FIG. 1 , the tire according to the present invention may include a tread part 10 , a sidewall part 20 , and a bead part 30 .

The tread 10 is a part in direct contact with the ground, and transmits the driving force and braking force of the vehicle to the road surface, and may include a cap tread and an undertread.

The sidewall part 20 may serve as a medium for protecting the carcass from external impact and transmitting the movement of the steering wheel to the tread part 10 via the bead part 30 . Specifically, the sidewall part 20 may include a sidewall rubber 21 attached to the outer surface of the carcass 50 and a rim cushion rubber mounted on the wheel.

The bead part 30 may include a bead core and a bead filler composed of a plurality of bead wires therein as a part to be mounted on the wheel.

The belt 40 may be disposed inside the tread unit 10 and may control performance such as road surface traction and handling. A reinforcing belt 45 for reinforcing the strength of the belt layer may be provided on the belt 40 . Specifically, the reinforcing belt 45 may be disposed directly on the belt 40 . Here, the meaning of being disposed 'directly on' means that no member is interposed between the reinforcing belt 45 and the belt 40 .

The upper layer of the reinforcing belt 45 may include a reinforcing cap ply and a belt cushion to prevent separation between the steel belt layers.

The carcass 50 may be disposed under the belt 40 to form the skeleton of the tire. The carcass 50 may be disposed from the tread part 10 to the bead part 30 through the sidewall part 20 . In particular, the carcass 50 may include a portion that wraps the bead core and rises again to a predetermined height, that is, a turn-up portion.

An inner liner (not shown) constituting the inner surface of the tire is provided on the inner surface of the carcass 50 to maintain the air pressure inside the tire.

In order to provide excellent conductivity in a tire combined with a compound having low conductivity and low rolling resistance, carbon fiber in the form of a filament may be generally used. However, since the filament-type carbon fiber has no hair, it may be difficult to attach to the rolled product. In addition, since the carbon fiber in the filament form is not provided with a crimp, it is difficult to expect frictional force between staple fibers, so the spinning process may be practically difficult.

On the other hand, when the filament-type carbon fiber and other metal-plated spun yarn, blended yarn, etc. are applied to a tire, the fibers must be separately prepared for a special purpose, which may cause disadvantageous problems in terms of manufacturing cost and time.

The first carbon fiber spun yarn 100 may be disposed between the carcass 50 and the sidewall rubber 21 . The first carbon fiber spun yarn 100 may extend along the first surface of the carcass 50 . The first surface may mean an outer surface of the carcass 50 . In the present specification, the outer surface means a surface extending to the bead portion along a surface that is close to the tread portion 10, and the inner surface extends to the bead portion along a surface that is relatively far from the tread portion 10. means side. In other words, the first surface may correspond to a surface facing the tread 10 .

Specifically, the first carbon fiber spun yarn 100 may be disposed on the upper half of the carcass 50 and the outer surface of the turn-up part. Therefore, the first carbon fiber spun yarn 100 can effectively move the static electricity transmitted from the vehicle from the bead part 30 to the tread part 10 and transfer it to the ground.

The precursor of the first carbon fiber spun yarn 100 may correspond to one or more selected from the group consisting of PAN (Polyacrylonitrile) fibers and Oxi-PAN (Oxidized Polyacrylonitrile) fibers. The Oxi-PAN (Oxidized Polyacrylonitrile) fiber, the PAN fiber is oxidized.

The fineness of the first carbon fiber spun yarn 100 may correspond to 10's to 100's, more preferably 50's to 100's, in terms of cotton count. Here, the cotton count may correspond to the number 1 when the length of the cotton yarn is 840 yards (768 m) when the weight of the cotton yarn is 1 pound (453 g).

When the cotton count of the first carbon fiber spun yarn 100 exceeds 100's, the fineness is low, and the workability may be disadvantageous due to insufficient tensile strength. Since the length is also limited, there may be difficulties in manufacturing. If the cotton count is less than 10's, the fineness is too high, which may cause a side effect that may act as a foreign substance in the tire, and a problem in that the amount used is unnecessarily increased.

Accordingly, the first carbon fiber spun yarn 100 according to the present invention can improve LRR (Low Rolling Resistance) performance of the carcass 50 and the sidewall rubber 21 while imparting electrical conductivity to parts other than the compound. have.

In addition, since the first carbon fiber spun yarn 100 is made in the same way as the application method of the air bleed yarn that is used to solve the non-suitability of air inlet in the carcass, it does not require additional facility improvement, thereby saving cost. can do. The air bleed yarn application method corresponds to a method for removing air between plies in a conventional tire.

On the other hand, the first carbon fiber spun yarn 100 according to the present invention has a sufficient surface area and hair, so that it can have very good adhesion to a rolled product. In addition, since the first carbon fiber spun yarn 100 has a conjugation structure, it may have high electrical conductivity. The conjugation structure is a phenomenon in which two or more multiple bonds exist with single bonds interposed therebetween, and these bonds cause interaction.

The first carbon fiber spun yarn 100 according to the present invention is disposed in a radial direction from the bead portion to the tread portion to secure an effective conductive path. For this reason, when the conductivity from the rim part to the tread part is ensured with the first carbon fiber spun yarn 100, the requirement for the electrical conductivity of the sidewall rubber 21 and the carcass 50 is reduced, so the rotational resistance In order to improve the performance, it is possible to apply a compound with a low Loss Modulus (E''). Accordingly, when the first carbon fiber spun yarn 100 according to the present invention is used, it is possible to simultaneously solve the problem of LRR performance and static electricity, which is a trade-off relationship in which when one performance is improved, the other performance is deteriorated.

Specifically, the tire to which the first carbon fiber spun yarn 100 according to the present invention is applied can improve fuel efficiency of automobiles due to low rotational resistance and solve the static electricity problem at the same time.

The tire according to the present invention may include 1 to 10 first carbon fiber spun yarns 100 . In addition, the resistance value of the tire may correspond to 1 kΩ to 100 MΩ at a voltage of 1000V.

The tire according to the present invention may correspond to tires of various shapes and sizes, such as for passenger cars, trucks, and high-performance tires.

2 is a half cross-sectional view of a tire including carbon fiber spun yarn in accordance with some embodiments. Descriptions overlapping with the above will be briefly described or omitted.

Referring to FIG. 2 , the carcass 50 according to the present invention may include a second surface opposite to the first surface. The second carbon fiber spun yarn 110 may extend along the second surface. Specifically, the second surface may correspond to the inner surface of the carcass 50 .

The first and second carbon fiber spun yarns 100 and 110 may be unextended along the third surface. Specifically, the third surface may correspond to a surface connecting the first surface and the second surface. That is, the third surface may correspond to a surface connecting the outer surface and the inner surface.

The method for manufacturing a tire according to the present invention provides an Oxi-PAN fiber generated in a process of oxidizing a PAN fiber, spinning the Oxi-PAN fiber to provide a carbon fiber spun yarn through a carbonization process, and the carbon fiber spun yarn , may be attached to the first surface of the carcass in one of a rolling process of rolling the carcass and a cutting process of cutting the carcass.

More specifically, the method for manufacturing a tire according to the present invention includes spinning the Oxi-PAN fiber to form an Oxi-PAN spun yarn, and carbonizing the OXi-PAN spun yarn to provide the carbon fiber spun yarn.

Looking at the manufacturing process of a general carbon fiber, as shown in Scheme 1 below, a PAN fiber may be subjected to oxidation and carbonization to form a carbon fiber. The oxidation process may be performed by spinning PAN fibers in a dry or wet manner, and then proceeding at a temperature of 250° C. and in the presence of oxygen. The oxidation process is a process of stabilizing PAN fibers so that they become carbon fibers without burning or decomposing in the carbonization process or graphitization process, which is the next process. As a result, when the PAN fiber is stabilized, the PAN fiber can be converted into an Oxi-PAN fiber composed of a hexagonal ring containing nitrogen.

[Scheme 1]

Specifically, Oxi-PAN fibers are formed by a process of stabilizing PAN fibers at around 250° C., and thus may correspond to chemically stabilized fibers that do not undergo thermal decomposition, combustion, or melting. The Oxi-PAN may have a yellow color by being conjugated in a certain period, and may have flexibility like general organic fibers.

Specifically, the Oxi-PAN fiber according to the present invention may correspond to the Waste Oxi-PAN fiber generated between the stabilization process and the carbonization process performed in the general carbon fiber manufacturing process.

First, the Waste Oxi-PAN fibers are recovered and cut into 2.5 to 10 cm (centimeters), which is a length capable of cotton spinning, to produce Oxi-PAN spun yarn through a general spinning facility. The process of manufacturing the Oxi-PAN spun yarn proceeds in the order of opening, carding, and spinning, and after carding, combing and spinning in the order of Comb Yarn. , Existing spinning techniques such as a spun yarn manufacturing step through an open end spinning and a spun yarn manufacturing step through an air jet may be used, and the technical spirit of the present invention is not limited thereto, and various spinning techniques technology may be used.

Therefore, since the Oxi-PAN spun yarn according to the present invention recovers and uses Waste Oxi-PAN fibers, additional equipment is not required, which may be advantageous in terms of manufacturing cost.

The carbon fiber spun yarn according to the present invention may be formed using the Oxi-PAN (Oxidized Polyacrylonitrile) fiber obtained in Scheme 1 above. The yield may correspond to at least 50% or more, and the fineness of the carbon fiber spun yarn may vary according to the yield. The fineness refers to the degree of thread thickness. Since the carbonization process must be performed after the Oxi-PAN spun yarn is manufactured, the carbon fiber spun yarn according to the present invention cannot be blended with other fibers.

On the other hand, the fineness of the Oxi-PAN spun yarn may correspond to 5's to 100's in terms of cotton count. When the fineness of the Oxi-PAN spun yarn exceeds 100's, the fineness of the precursor itself is low, and the fineness becomes too low depending on the yield during the carbonization and graphitization process. . When the fineness of the Oxi-PAN spun yarn is less than 5's, due to the coarse fineness, a problem that may act as a foreign substance in the tire and an inefficient problem of using an amount more than necessary may occur.

The carbon fiber spun yarn according to the present invention may be formed through a carbonization process in the Oxi-PAN spun yarn, and the fineness of the carbon fiber spun yarn may correspond to a cotton count of 10's to 100's.

Specifically, the carbon fiber spun yarn 100 may correspond to carbonization of the Oxi-PAN spun yarn at 1000 to 2000° C. under a nitrogen atmosphere.

The carbon fiber spun yarn according to the present invention may be attached to the carcass in either the process of rolling the carcass or the process of cutting the carcass.

More preferably, the process of attaching the carbon fiber spun yarn to the carcass is preferably performed in a rolling process. Since the existing equipment for attaching the air bleed yarn to the rolled material can be used as it is, there is no need for a separate attachment equipment construction or a separate process. For example, if it is attached in the cutting process and the forming process, a separate additional process will occur, which will cause a problem in the efficiency of the manufacturing process time, but it is applied to the air bleed yarn attachment equipment and process in the existing rolling process. In case of input, it can be applied only by partially replacing the existing Air Bleed Yarn with the corresponding carbon fiber spun yarn.

[Production Example]

As shown in Tables 1 and 2 below, the tire standard 225/45R17 and the conductive fiber application method were selected in the same manner as the air bleed yarn method, and tires according to Examples and Comparative Examples were manufactured. The tire was manufactured by a conventional tire manufacturing method.

<Comparative Example 1>

Comparative Example 1 corresponds to a tire made of a spun yarn having a cotton material of 30's. The carcass compound of the tire according to Comparative Example 1 is a current compound in an unenergized state, and the sidewall compound is a current compound in a energized state.

<Comparative Example 2>

Comparative Example 2 corresponds to a tire made of continuous carbon fiber yarn and 1K filament having a fiber thickness. The carcass compound of the tire according to Comparative Example 2 is an LRR compound in an unenergized state, and the sidewall compound is an LRR compound in an unenergized state. On the other hand, the number of fibers applied to one tire corresponds to two.

<Comparative example 3>

Comparative Example 3 corresponds to a tire made of continuous carbon fiber yarn 20's and a 1K filament having a fiber thickness. The carcass compound of the tire according to Comparative Example 3 is a current compound in an unenergized state, and the sidewall compound is an LRR compound. On the other hand, the number of fibers applied to one tire corresponds to four.

<Comparative Example 4>

Comparative Example 4 corresponds to a tire made of cotton 30's spun yarn. The carcass compound of the tire according to Comparative Example 4 is an LRR compound in an unenergized state, and the sidewall compound is an LRR compound in an unenergized state.

<Comparative Example 5>

Comparative Example 5 corresponds to a tire made of cotton 30's spun yarn. The carcass compound of the tire according to Comparative Example 5 is an LRR compound in an unenergized state, and the sidewall compound is a current compound in a energized state.

<Comparative Example 6>

Comparative Example 6 corresponds to a tire made of copper sulfate-plated acrylic fiber and 30's fiber in which cotton is mixed in a 6:4 ratio. The carcass compound of the tire according to Comparative Example 6 is an LRR compound in an unenergized state, and the sidewall compound is a current compound in a energized state. On the other hand, the number of fibers applied to one tire corresponds to 10.

<Comparative Example 7>

Comparative Example 7 corresponds to a tire made of copper sulfate-plated acrylic fiber and 30's fiber in which cotton is blended in a ratio of 6:4. The carcass compound of the tire according to Comparative Example 7 is an LRR compound in an unenergized state, and the sidewall compound is an LRR compound in an unenergized state. Meanwhile, the number of fibers applied to one tire corresponds to eight.

<Example 1>

Example 1 corresponds to a tire made of carbon fiber spun yarn 20's. The carcass compound of the tire according to Example 1 is an LRR compound in an unenergized state, and the sidewall compound is an LRR compound in an unenergized state. On the other hand, the number of fibers applied to one tire corresponds to two.

<Example 2>

Example 2 corresponds to a tire made of carbon fiber spun yarn 20's. The carcass compound of the tire according to Example 2 is an LRR compound in an unenergized state, and the sidewall compound is an LRR compound in an unenergized state. On the other hand, the number of fibers applied to one tire corresponds to four.

<Example 3>

Example 3 corresponds to a tire made of carbon fiber spun yarn 20's. The carcass compound of the tire according to Example 3 is an LRR compound in an unenergized state, and the sidewall compound is a current compound in an energized state. On the other hand, the number of fibers applied to one tire corresponds to two.

Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 1 Example 2 standard 225/45R17 225/45R17 225/45R17 225/45R17 225/45R17 application area Air bleed yarn Air bleed yarn Air bleed yarn Air bleed yarn Air bleed yarn conductive fiber Cotton material 30's spun yarn Carbon Fiber Yarn 20's carbon fiber continuous yarn
20's carbon fiber yarn carbon fiber yarn the thickness of the fiber 30's 1K 1K 20's 20's carcass compound current compound
(not energized) LRR compound
(not energized) Current compound (not energized) LRR compound
(not energized) LRR compound
(not energized) sidewall compound Current compound (energized) LRR compound
(not energized) LRR compound
(not energized) LRR compound
(not energized) LRR compound
(not energized) Number of fibers applied to one tire - 2 4 2 4

Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Example 3 standard 225/45R17 225/45R17 225/45R17 225/45R17 225/45R17 application area Air bleed yarn Air bleed yarn Air bleed yarn Air bleed yarn Air bleed yarn conductive fiber cotton yarn cotton yarn Copper sulfate plated acrylic fiber and
30's fiber with a 6:4 cotton blend Copper sulfate plated acrylic fiber and Cotton 6: 4 blended 30's fiber carbon fiber yarn the thickness of the fiber 30's 30's 30's 30's 20's carcass compound LRR compound (not energized) LRR compound
(not energized) LRR compound
(not energized) LRR compound
(not energized) LRR compound
(not energized) sidewall compound LRR compound (not energized) Current compound (energized) current compound
(energized) LRR compound
(not energized) Current compound (energized) Number of fibers applied to one tire - - 10 8 2

[Experimental example]

For the tires manufactured in Examples and Comparative Examples, 1) electrical resistance, 2) conductive fiber adhesion on a rolled object, 3) durability, 4) RRc (Rolling Resistance coefficient) were measured, and the results are shown in Table 3 and Tables below 4 is shown.

Each evaluation method is as follows.

1) electrical resistance

It can be seen that the lower the electrical resistance, the more advantageous the conductivity. The electrical resistance uses a method of measuring the resistance by attaching the tire to the rim, positioning the rim and the tire assembly mounted on the copper plate, and applying a voltage of 1000 V between the rim and the copper plate (ground).

2) Adhesion of conductive fibers on rolled products

After attaching by air bleed yarn input method in the rolling process, until the forming process

Check if it is manufactured without being separated from the rolled or cut product

3) Durability (general durability, high-speed durability, long-term durability)

For general durability, the FMVSS 139 test standard designated by FMVSS is used, and for high-speed durability, the ECE R30 test standard is used. Long-term durability is performed according to the company's own test standards, and compared to standard air pressure, it is compared by performing abnormally on a 1.7m drum running endurance tester at 80kph speed.

4) RRc (Rolling Resistance coefficient)

The lower the RRc, the better the rolling resistance performance. The RRc is measured according to the ISO28580 standard.

Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 1 Example 2 Electrical resistance (MΩ) 50.9 One 0.5 One 0.5 Conductivity on rolled products
fiber adhesion - disadvantage disadvantage Good Good high-speed durability 100min (OK) 100min (OK) 100min (OK) 100min (OK) 100min (OK) general durability 60hr (OK) 60hr (OK) 60hr (OK) 60hr (OK) 60hr (OK) Long-term durability 400hr (OK) 400hr (OK) 400hr (OK) 400hr (OK) 400hr (OK) RRc 100 95 96 95 95

Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Example 3 electrical resistance 29.9 50 2 20.1 0.1 Conductivity on rolled products
fiber adhesion - - Good Good Good high-speed durability 100min (OK) 100min (OK) 100min (OK) 100min (OK) 100min (OK) general durability 60hr (OK) 60hr (OK) 60hr (OK) 60hr (OK) 60hr (OK) Long-term durability 400hr (OK) 400hr (OK) 400hr (OK) 400hr 400hr RRc 95 99 99 95 99

In Examples 1 to 3, while durability is maintained, it can be confirmed that very good electrical conductivity can be secured and rotational resistance is good even when only 2 to 4 carbon fiber spun yarns are used in one tire. In Comparative Examples 6 and 7, as a result of using metal-plated conductive organic fiber blended yarns in each tire, the conduction performance was lower than in Examples 1 to 3 even though a larger amount of conductive fibers were used.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments, but may be manufactured in various different forms, and those of ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (11)

A method of manufacturing a tire including a tread, a bead and a sidewall, the method comprising:
The tire is
a belt disposed inside the tread;
It is disposed under the belt and includes a carcass disposed up to the sidewall part and the bead part,
and a first carbon fiber spun yarn extending along the first surface of the carcass,
The method of manufacturing the tire,
The Waste Oxi-PAN fiber generated in the process of oxidizing the PAN fiber is cut into 2.5 to 10 cm,
Spinning the cut Waste Oxi-PAN fiber, and providing the first carbon fiber spun yarn through a carbonization process,
The first carbon fiber spun yarn will be attached to the first surface of the carcass in a rolling process of rolling the carcass,
A method of manufacturing a tire. According to claim 1,
The first surface of the carcass is a surface facing the tread portion. The method of claim 1,
The carcass includes a second surface opposite to the first surface,
The method of manufacturing a tire further comprising a second carbon fiber spun yarn extending along the second surface. 4. The method of claim 3,
A method of manufacturing a tire in which the first and second carbon fiber spun yarns are non-extended along a third surface connecting the first surface and the second surface. delete delete The method of claim 1,
The method of manufacturing a tire, wherein the fineness of the first carbon fiber spun yarn is 10's to 100's in cotton count. The method of claim 1,
The tire is a method of manufacturing a tire including 1 to 10 of the first carbon fiber spun yarn. The method of claim 1,
The tire has a resistance value of 1 kΩ to 100 MΩ at a voltage of 1000V. delete delete

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