WO2014192497A1 - Tubeless tyre puncture-resistant sheet, tubeless tyre, and tubeless tyre puncture repair method - Google Patents

Abstract

A tubeless tyre puncture-resistant sheet (3) to be affixed to the inner surface (1A) of a tubeless tyre (100). This puncture-resistant sheet (3) comprises a first substrate film (23), and a first acrylic-based adhesive layer (24) laminated on the first substrate film (23). The puncture-resistant sheet (3) may further comprise a second adhesive sheet (11) to be adhered to the inner surface (1A) of the tubeless tyre (100) at the opposite side of the first substrate film (23) to the first acrylic-based adhesive layer (24).

Description

Puncture resistant sheet for tubeless tire, tubeless tire and puncture repair method for tubeless tire

The present invention relates to a puncture-resistant sheet for a tubeless tire that is attached to the inner surface of a tubeless tire to prevent puncture.

Conventionally, a puncture-resistant composition layer is formed on the inner surface of a tubeless tire to prevent puncture.

Japanese Patent Application Laid-Open No. 62-149501 (Patent Document 1) describes a no-puncture tire in which a semi-solid adhesive such as a silicone agent or a flexible rubber is fused.

International Publication No. 99/62998 (Patent Document 2) describes, as a puncture-resistant composition suitable for a tubeless tire, a composition containing a thermoplastic elastomer which is a styrenic block copolymer as an active ingredient. .

JP 2003-159917 A (Patent Document 3) describes a tire having an anti-puncture performance in which a thermoplastic resin film is disposed on the inner surface of an adhesive sealant.

Japanese Patent Laid-Open No. 62-149501 International Publication No. 99/62998 JP 2003-159917 A

However, in the above-mentioned patent document 1, “a semi-solid adhesive such as a silicone agent or a flexible rubber” is described as “an adhesive having a property of solidifying a portion in contact with air but maintaining a paste inside”. Yes. That is, it is necessary to apply a paste-like pressure-sensitive adhesive to the inner surface of the tire and solidify only the portion that comes into contact with air. It is extremely difficult to make the thickness uniform when applying the paste-like adhesive to the inner surface of the tire. When the pressure-sensitive adhesive is applied to the inner surface of the tire, if the thickness of the pressure-sensitive adhesive is non-uniform and thin, the puncture resistance of that portion will be significantly reduced.

In addition, Patent Document 2 discloses “a composition containing a thermoplastic elastomer that is a styrene block copolymer as an active ingredient” as a composition imparting puncture resistance. However, it is said that this composition must be applied to the inside of the tire by hot melting at a high temperature. Thus, it is very difficult to make the thickness uniform when the composition is applied to the inside of the tire by the hot melting method. If the thickness of the pressure-sensitive adhesive is uneven and a thin portion is formed, the puncture resistance of that portion is greatly reduced.

In addition, Patent Document 3 discloses “adhesive sealant obtained by heat-treating a rubber composition containing polyisobutylene” as a composition imparting puncture resistance. However, regarding this adhesive sealant, a rubber composition and a thermoplastic resin film are disposed on the inner surface of an unvulcanized tire, and an adhesive sealant layer is formed when the unvulcanized tire is vulcanized. If it does so, at the time of the heating for vulcanization | cure, although the fluidity | liquidity of an adhesive sealant is suppressed to some extent by a thermoplastic resin film, there exists a possibility that the dispersion | variation by a site | part may arise in the thickness of an adhesive sealant layer.

The present invention has been made in view of such circumstances, and a puncture-resistant sheet for a tubeless tire, a tubeless tire, and a puncture repair method for a tubeless tire that can easily provide stable puncture resistance performance to a tubeless tire. The purpose is to provide.

The puncture-resistant sheet for a tubeless tire of the present invention is a puncture-resistant sheet for a tubeless tire that is adhered to the inner surface of the tubeless tire, and the puncture-resistant sheet has an acrylic pressure-sensitive adhesive layer laminated on a base film. The main point is that an adhesive sheet is used.

That is, the puncture-resistant sheet for tubeless tires according to the present invention is a puncture-resistant sheet for tubeless tires to be adhered to the inner surface of the tubeless tire. This puncture-resistant sheet includes a base film and an acrylic pressure-sensitive adhesive layer laminated on the base film.

The tubeless tire according to the present invention includes a tire body and a puncture-resistant sheet portion disposed on the inner surface of the tire body. The puncture-resistant sheet portion is the puncture-resistant sheet of the present invention, and the first base film side is attached to the inner surface.

The tubeless tire puncture repair method of the present invention is a method of attaching a puncture-resistant sheet using a pressure-sensitive adhesive sheet in which an acrylic pressure-sensitive adhesive layer is laminated on a base film to the inner surface of a tubeless tire and penetrating the tubeless tire. A scraping member with a scraping portion formed at the tip is inserted into the through hole after removing the body from the outside of the tubeless tire, and the acrylic adhesive present on the inner surface of the tubeless tire is penetrated by the scraping portion into the through hole. The gist is to rake toward the hole.

That is, the method for repairing puncture of a tubeless tire according to the present invention includes a step of attaching the puncture-resistant sheet of the present invention to the inner surface of the tubeless tire on the first base film side, and the puncture-resistant sheet on the inner surface. A step of removing the sharp body penetrating the tubeless tire to which the sheet is attached, and a scraping member in which a scraping portion is formed from the outer surface side of the tubeless tire to the tip in the through hole after the sharp body is removed And the step of scraping the acrylic pressure-sensitive adhesive constituting the first acrylic pressure-sensitive adhesive layer toward the through-hole by the scraping portion.

According to the tubeless tire puncture-resistant sheet, tubeless tire, and tubeless tire puncture repair method of the present invention, the tubeless tire can be easily imparted with stable puncture-proof performance. A tubeless tire and a puncture repair method for a tubeless tire can be provided.

It is sectional drawing which shows the tubeless tire with which the puncture-proof sheet | seat was affixed. It is sectional drawing which shows an example of the structure of the puncture-resistant sheet | seat for tubeless tires. It is a figure which shows the laminated structure of a 1st adhesive sheet. It is a figure which shows the laminated structure of a 2nd adhesive sheet. It is a figure which shows the state which laminates | stacks a 1st adhesive sheet and a 2nd adhesive sheet, and produces a puncture-proof sheet. It is a figure which shows an example of the structure of the puncture-resistant sheet | seat for tubeless tires. It is sectional drawing which shows the state which affixed the puncture-resistant sheet | seat for tubeless tires on the tubeless tire. It is sectional drawing which shows the state which affixed the puncture-resistant sheet | seat for tubeless tires on the tubeless tire. It is sectional drawing for demonstrating the puncture repair method of a tubeless tire. It is sectional drawing for demonstrating the other example of the puncture repair method.

First, an outline of an embodiment of the present invention will be described. A puncture-resistant sheet for a tubeless tire is a puncture-resistant sheet for a tubeless tire that is adhered to the inner surface of the tubeless tire, and the puncture-resistant sheet is an adhesive sheet in which an acrylic pressure-sensitive adhesive layer is laminated on a base film. Is used.

That is, the puncture-resistant sheet for a tubeless tire is a puncture-resistant sheet for a tubeless tire to be attached to the inner surface of the tubeless tire. This puncture-resistant sheet includes a first base film and a first acrylic pressure-sensitive adhesive layer laminated on the first base film.

In the above-described puncture-resistant sheet for a tubeless tire, an adhesive sheet in which an acrylic adhesive layer is laminated on a base film is attached to the inner surface of the tubeless tire. As a result, puncture resistance can be easily imparted to commercially available tubeless tires. That is, even if a sharp object such as a nail is pierced and penetrates the tubeless tire, the acrylic adhesive present on the inner surface of the tubeless tire adheres to the sharp object and penetrates into the through-hole when it is pulled out. When the sharp body is removed and the through hole is formed, the acrylic pressure-sensitive adhesive present on the inner surface of the tubeless tire is pushed out into the through hole by the internal pressure of the tubeless tire. In this way, the through hole is blocked by the acrylic adhesive. The air filled in the tubeless tire leaks a little when the sharp body is pulled out, but hardly leaks after the through hole is blocked.

Moreover, when sticking an adhesive sheet on the inner surface of a tubeless tire, it is possible to handle and stick an acrylic adhesive layered in advance for each base film. Therefore, the thickness of the acrylic pressure-sensitive adhesive that imparts puncture resistance to the tubeless tire is not non-uniform, and a decrease in puncture resistance due to the non-uniform thickness can be suppressed.

The puncture-resistant sheet may be configured by further laminating a plurality of the pressure-sensitive adhesive sheets. Thereby, the acrylic adhesive layer existing on the inner surface of the tubeless tire becomes a plurality of layers, and the total thickness is increased. Accordingly, the puncture resistance is improved accordingly, and even if a sharp object such as a thick nail is pierced to form a large through hole, the through hole is sufficiently blocked by the acrylic adhesive. Therefore, there is little escape of the air filled in the tubeless tire, and more excellent puncture resistance performance is exhibited.

The puncture-resistant sheet may include a second pressure-sensitive adhesive sheet in which an acrylic pressure-sensitive adhesive layer is formed on both surfaces of the base film as the pressure-sensitive adhesive sheet.

Thus, there are two layers in which the acrylic pressure-sensitive adhesive layer present on the inner surface of the tubeless tire is formed on both surfaces of the base film, and the total thickness is increased. Accordingly, the puncture resistance is improved accordingly, and even if a sharp object such as a thick nail is pierced to form a large through hole, the through hole is sufficiently blocked by the acrylic adhesive. Therefore, there is little escape of the air filled in the tubeless tire, and more excellent puncture resistance performance is exhibited.

The puncture-resistant sheet may include a first pressure-sensitive adhesive sheet in which an acrylic pressure-sensitive adhesive layer is formed on one side of the base film as the pressure-sensitive adhesive sheet.

Thereby, when sticking the adhesive sheet to the inner surface of the tubeless tire, it is possible to handle and stick the layered acrylic adhesive for each base film. Therefore, the thickness of the acrylic pressure-sensitive adhesive that imparts puncture resistance to the tubeless tire is not non-uniform, and a decrease in puncture resistance due to the non-uniform thickness can be suppressed.

In this case, the puncture-resistant sheet may include two of a first pressure-sensitive adhesive sheet and a second pressure-sensitive adhesive sheet.

Thereby, the acrylic adhesive layer present on the inner surface of the tubeless tire includes three layers including the two layers constituting the second adhesive sheet and the one layer constituting the first adhesive sheet. , The total thickness becomes thicker. Accordingly, the puncture resistance is improved accordingly, and even if a sharp object such as a thick nail is pierced to form a large through hole, the through hole is sufficiently blocked by the acrylic adhesive. Therefore, there is little escape of the air filled in the tubeless tire, and more excellent puncture resistance performance is exhibited.

In the puncture-resistant sheet, the second pressure-sensitive adhesive sheet may be disposed on the side to be adhered to the inner surface of the tubeless tire, and the first pressure-sensitive adhesive sheet may be disposed on the inner space side of the tubeless tire.

By placing the second pressure-sensitive adhesive sheet having an acrylic pressure-sensitive adhesive layer formed on both surfaces of the base film on the side to be adhered to the inner surface of the tubeless tire, the second pressure-sensitive adhesive sheet is replaced with a double-sided tape. 1 adhesive sheet can be stuck. For this reason, the several adhesive sheet of a 1st adhesive sheet and a 2nd adhesive sheet is laminated | stacked easily, and it does not slip | deviate or peel after that. In this way, puncture resistance is reliably imparted to the tubeless tire.

The puncture-resistant sheet may be laminated so that the first pressure-sensitive adhesive sheet is in close contact with the second pressure-sensitive adhesive sheet.

Thereby, the first pressure-sensitive adhesive sheet is arranged so that the acrylic pressure-sensitive adhesive layer is exposed to the internal space of the tubeless tire. For this reason, when a sharp body such as a nail is pierced and penetrated into the tubeless tire, the acrylic adhesive firmly adheres to the portion of the pierced sharp body that projects into the internal space of the tubeless tire. Then, when the sharp body is pulled out, the acrylic pressure-sensitive adhesive attached to the sharp body enters the through hole. When the sharp body is removed and the through hole is formed, the acrylic adhesive is pushed into the through hole by the internal pressure of the tubeless tire. As a result, the through hole is blocked by the acrylic pressure-sensitive adhesive. In this way, puncture resistance is reliably imparted to the tubeless tire.

The puncture-resistant sheet may further include an adhesive portion to be bonded to the inner surface of the tubeless tire on the opposite side of the first base film from the first acrylic pressure-sensitive adhesive layer.

Moreover, in the puncture-resistant sheet, the adhesive portion may include a second base film and a second acrylic pressure-sensitive adhesive layer laminated on the second base film.

In the puncture-resistant sheet, the second acrylic pressure-sensitive adhesive layer may be laminated on both surfaces of the second base film.

In the puncture-resistant sheet, the second acrylic pressure-sensitive adhesive layer and the first base film may be bonded together.

The tubeless tire includes a tire body and a puncture-resistant seat portion disposed on the inner surface of the tire body. The puncture-resistant sheet portion is the puncture-resistant sheet. And the 1st base film side is affixed with respect to the said inner surface.

In the puncture repair method for a tubeless tire, a scraping member having a scraping portion formed at the tip is inserted from the outside of the tubeless tire into the through hole after the sharp body penetrating the tubeless tire is removed. And the acrylic adhesive which exists in the inner surface of a tubeless tire is scraped toward the said through-hole by the said scraping part.

In this way, when the scraping member is removed from the through hole, the acrylic adhesive present on the inner surface of the tubeless tire adheres to the scraping member and enters the through hole. In this way, the through hole is blocked by the acrylic adhesive. Therefore, even if a thick pointed body pierces the tubeless tire and has a large through hole, the through hole can be reliably closed with the acrylic adhesive.

That is, the tubeless tire puncture repair method includes the steps of attaching the puncture-resistant sheet to the inner surface of the tubeless tire on the first base film side, and the tubeless tire having the puncture-resistant sheet attached to the inner surface. A scraping member in which a scraping portion is formed at the tip from the outer surface side of the tubeless tire is inserted into the through hole after the sharp body has been removed and the through hole after the sharp body has been removed. And a step of scraping the acrylic pressure-sensitive adhesive constituting the acrylic pressure-sensitive adhesive layer toward the through hole.

Next, an embodiment of a puncture-resistant sheet and a tubeless tire according to the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

First, a puncture-resistant sheet for a tubeless tire and a tubeless tire according to an embodiment (first embodiment) of the present invention will be described.

As shown in FIG. 1, the puncture-resistant sheet 3 of this embodiment is attached to the inner surface of the tire body 1 of the tubeless tire 100. The tubeless tire 100 includes an inner liner (not shown) for holding air pressure like a tube inside the tire body 1 and has a structure capable of holding air pressure when the tire is in close contact with the rim. . The tubeless tire 100 does not need to be a particularly limited tubeless tire, and may be various tubeless tires that are commercially available, for example. The inner surface 1A of the tubeless tire 100 refers to a surface on the inner space side that is filled with air. The tubeless tire 100 includes a tire body 1, a bead 4 embedded in a bead portion of the tire body 1 and having a structure in which steel wires are bundled, and a tire extending so as to extend from one bead 4 to the other bead 4. A carcass 2 made of a cord such as polyester, nylon, or rayon is embedded in the main body 1. Further, the puncture-resistant sheet 3 is attached so as to cover at least a portion corresponding to the tread 1C on the inner surface 1A of the tubeless tire 100.

That is, the tubeless tire 100 in the present embodiment includes the tire body 1 and the puncture-resistant sheet 3 as a puncture-resistant sheet portion disposed on the inner surface 1A of the tire body 1.

As shown in FIG. 2, the puncture-resistant sheet 3 uses pressure-sensitive adhesive sheets 11 and 22 in which acrylic pressure-sensitive adhesive layers 14a, 14b, and 24 are laminated on base films 13 and 23.

That is, referring to FIG. 2, the puncture-resistant sheet 3 includes a first base film 23 and a first acrylic pressure-sensitive adhesive layer 24 laminated on the first base film 23. . The first base film 23 and the first acrylic pressure-sensitive adhesive layer 24 constitute a first pressure-sensitive adhesive sheet 22.

The puncture-resistant sheet 3 is configured by laminating the pressure-sensitive adhesive sheets 11 and 22. In this example, the first adhesive sheet 22 and the second adhesive sheet 11 are laminated. In addition to laminating the two pressure-sensitive adhesive sheets 11 and 22 of the first pressure-sensitive adhesive sheet 22 and the second pressure-sensitive adhesive sheet 11, there is also an aspect in which a third pressure-sensitive adhesive sheet and a fourth pressure-sensitive adhesive sheet (not shown) are stacked. This is within the scope of the present invention.

As shown in FIG. 4, in the puncture-resistant sheet 3, the second pressure-sensitive adhesive sheet 11 includes a second base film 13 and a second acrylic pressure-sensitive adhesive laminated on the second base film 13. Layers 14a and 14b. Second acrylic pressure-sensitive adhesive layers 14 a and 14 b are formed on both surfaces of the second base film 13.

Referring to FIG. 4, in the second pressure-sensitive adhesive sheet 11, a second acrylic pressure-sensitive adhesive layer 14 a is laminated on a second release film 15, and a second base film 13 is formed thereon. The second release film 15 was removed from the pressure-sensitive adhesive sheet with a release film that was laminated and formed by further laminating the second acrylic pressure-sensitive adhesive layer 14b on the second base film 13. May be.

As the second release film 15, for example, a PET film or the like can be employed. As said 2nd base film 13, an acrylic nonwoven fabric etc. are employable, for example. As said 2nd acrylic adhesive layer 14a, 14b, what shape | molded the acrylic type pressure sensitive adhesive in the layer form, for example is employable.

As a specific example of the second pressure-sensitive adhesive sheet 11, for example, a Black Elastic Tacky (BETA) Tapes (Beta Tape) double-sided adhesive type 4405 manufactured by Sumitomo 3M Limited can be used. In this specific example, the second acrylic pressure-sensitive adhesive layers 14a and 14b are black.

As shown in FIG. 3, in this example, the puncture-resistant sheet 3 includes a first pressure-sensitive adhesive sheet 22 and a first acrylic pressure-sensitive adhesive layer 24 formed on one surface of a first base film 23. It is configured.

In the first pressure-sensitive adhesive sheet 22, a first base film 23 is laminated on a first release film 25, and a first acrylic pressure-sensitive adhesive layer 24 is laminated on the first base film 23. The 1st peeling film 25 may be removed from the adhesive sheet with a peeling film comprised by being performed.

As the 1st peeling film 25, a PET film etc. are employable, for example. As said 1st base film 23, an acryl-type ionomer film etc. are employable, for example. As the first acrylic pressure-sensitive adhesive layer 24, for example, an acrylic pressure-sensitive adhesive formed into a layer shape can be used.

As a specific example of the first pressure-sensitive adhesive sheet 22, for example, a smart seal tape 4412N manufactured by Sumitomo 3M Limited can be used. In this specific example, the first acrylic pressure-sensitive adhesive layer 24 is white.

As shown in FIG. 5, the 2nd adhesive sheet 11 which removed the said 2nd peeling film 15 and the 1st adhesive sheet 22 which removed the said 1st peeling film 25 are laminated | stacked. That is, the second acrylic pressure-sensitive adhesive layer 14b and the first base film 23 are bonded together. By doing in this way, the puncture-resistant sheet | seat 3 of this Embodiment can be produced. In the second pressure-sensitive adhesive sheet 11 in this example, the second acrylic pressure-sensitive adhesive layers 14a and 14b formed on both surfaces of the second base film 13 each have a thickness of about 2 mm. Moreover, in the 1st adhesive sheet 22, the acrylic adhesive layer 24 formed in the single side | surface of the 1st base film 23 has thickness of about 2 mm. Therefore, the thickness of the acrylic pressure-sensitive adhesive layer as a whole is about 6 mm.

From the viewpoint of facilitating transportation and storage of the puncture-resistant sheet 3, release films may be disposed on both sides of the puncture-resistant sheet 3. Specifically, referring to FIG. 6, a release film 92 may be disposed on the surface of first acrylic pressure-sensitive adhesive layer 24 on the side opposite to first base film 23. Moreover, the peeling film 91 may be arrange | positioned at the surface on the opposite side to the 2nd base film of the 2nd acrylic adhesive layer 14a. The release film 92 and the release film 91 may be the first release film 25 and the second release film 15, respectively.

As shown in FIG. 7, in the puncture-resistant sheet 3, the second pressure-sensitive adhesive sheet 11 is disposed on the side that is adhered to the inner surface 1 </ b> A of the tubeless tire 100, and the first space is disposed on the inner space side of the tubeless tire 100. The adhesive sheet 22 is preferably disposed.

In the puncture-resistant sheet 3, the first pressure-sensitive adhesive sheet 22 is preferably laminated so that the first base film 23 side is in close contact with the second pressure-sensitive adhesive sheet 11.

The puncture-resistant sheet 3 of the present embodiment includes pressure-sensitive adhesive sheets 11 and 22 in which acrylic pressure-sensitive adhesive layers 14 a, 14 b and 24 are laminated on base film 13 and 23, and is adhered to the inner surface 1 </ b> A of the tubeless tire 100. . Thereby, the puncture resistance can be easily imparted to the commercially available tubeless tire 100. That is, even if a sharp object such as a nail pierces and penetrates the tubeless tire 100, the acrylic adhesive present on the inner surface 1A of the tubeless tire 100 adheres to the sharp object and penetrates into the through hole when it is pulled out. To do. Further, when the sharp body is removed and the through hole is formed, the acrylic adhesive present on the inner surface 1A of the tubeless tire 100 is pushed into the through hole by the internal pressure of the tubeless tire 100. In this way, the through hole is blocked by the acrylic adhesive. The air filled in the tubeless tire 100 leaks a little when the sharp body is pulled out, but hardly leaks after the through hole is blocked.

In addition, when the adhesive sheets 11 and 22 are attached to the inner surface 1A of the tubeless tire 100, an acrylic adhesive that has been layered in advance can be handled and attached to each of the base films 13 and 23. Therefore, the thickness of the acrylic pressure-sensitive adhesive that imparts puncture resistance to the tubeless tire 100 is suppressed, and a decrease in puncture resistance due to the nonuniformity is suppressed. Further, as shown in FIG. 6, the release film 91 is first removed from the puncture-resistant sheet 3 prepared by previously laminating the first pressure-sensitive adhesive sheet 22 and the second pressure-sensitive adhesive sheet 11, and the second acrylic system is removed. After the puncture-resistant sheet 3 is attached to the inner surface 1A of the tubeless tire 100 in the pressure-sensitive adhesive layer 14a, the release film 92 may be removed.

Since the puncture-resistant sheet 3 is configured by laminating the pressure-sensitive adhesive sheets 11 and 22, the acrylic pressure-sensitive adhesive layers 14a, 14b, and 24 existing on the inner surface 1A of the tubeless tire 100 become a plurality of layers, and the total Thickness increases. Accordingly, the puncture resistance is improved accordingly, and even if a sharp object such as a thick nail is pierced to form a large through hole, the through hole is sufficiently blocked by the acrylic adhesive. Therefore, there is little escape of the air filled in the tubeless tire 100, and more excellent puncture resistance performance is exhibited.

The puncture-resistant sheet 3 includes a second pressure-sensitive adhesive sheet 11 in which second acrylic pressure-sensitive adhesive layers 14 a and 14 b are formed on both surfaces of the second base film 13. Therefore, the second acrylic pressure-sensitive adhesive layers 14 a and 14 b existing on the inner surface of the tubeless tire 100 include two layers formed on both surfaces of the second base film 13, and the total thickness is increased. Accordingly, the puncture resistance is improved accordingly, and even if a sharp object such as a thick nail is pierced to form a large through hole, the through hole is sufficiently blocked by the acrylic adhesive. Therefore, there is little escape of the air filled in the tubeless tire 100, and more excellent puncture resistance performance is exhibited.

The puncture-resistant sheet 3 includes a first pressure-sensitive adhesive sheet 22 having a first acrylic pressure-sensitive adhesive layer 24 formed on one side of a first base film 23. Therefore, when the first adhesive sheet 22 is attached to the inner surface 1A of the tubeless tire 100, the first acrylic adhesive 24 that has been layered in advance is handled and attached to each first base film 23. can do. Therefore, the thickness of the acrylic pressure-sensitive adhesive that imparts puncture resistance to the tubeless tire 100 is suppressed, and a decrease in puncture resistance due to the nonuniformity is suppressed.

Further, the puncture-resistant sheet 3 includes two pressure-sensitive adhesive sheets, a second pressure-sensitive adhesive sheet 11 and a first pressure-sensitive adhesive sheet 22. Therefore, the acrylic pressure-sensitive adhesive layers 14 a, 14 b and 24 existing on the inner surface 1 </ b> A of the tubeless tire 100 include two layers constituting the second pressure-sensitive adhesive sheet 11 and one layer constituting the first pressure-sensitive adhesive sheet 22. The total is 3 layers, and the total thickness is increased. Accordingly, the puncture resistance is improved accordingly, and even if a sharp object such as a thick nail is pierced to form a large through hole, the through hole is sufficiently blocked by the acrylic adhesive. Therefore, there is little escape of the air filled in the tubeless tire 100, and more excellent puncture resistance performance is exhibited.

In the puncture-resistant sheet 3, the second pressure-sensitive adhesive sheet 11 is disposed on the side adhered to the inner surface 1 </ b> A of the tubeless tire 100, and the first pressure-sensitive adhesive sheet 22 is disposed on the inner space side of the tubeless tire 100. . That is, the 1st base film 23 side of the puncture-resistant sheet | seat 3 provided with the 1st base film 23 and the 1st acrylic adhesive layer 24 is affixed with respect to the inner surface 1A. Therefore, the second pressure-sensitive adhesive sheet 11 in which the second acrylic pressure-sensitive adhesive layers 14 a and 14 b are formed on both surfaces of the second base film 13 is disposed on the side to be attached to the inner surface 1 </ b> A of the tubeless tire 100. It becomes. As a result, the first pressure-sensitive adhesive sheet 22 can be adhered by using the second pressure-sensitive adhesive sheet 11 as a double-sided tape. That is, the puncture-resistant sheet 3 is a second adhesive as an adhesive portion to be adhered to the inner surface 1A of the tubeless tire 100 on the opposite side of the first base film 23 from the first acrylic adhesive layer 24. A sheet 11 is provided. For this reason, the second adhesive sheet 11 and the first adhesive sheet 22 can be easily laminated on the inner surface 1A, and will not be displaced or peeled thereafter. In this way, the puncture resistance is reliably imparted to the tubeless tire 100.

In the puncture-resistant sheet 3, the first pressure-sensitive adhesive sheet 22 is laminated so that the first base film 23 side is in close contact with the second pressure-sensitive adhesive sheet 11.

The first pressure-sensitive adhesive sheet 22 is arranged so that the first acrylic pressure-sensitive adhesive layer 24 is exposed to the internal space of the tubeless tire 100. For this reason, when a sharp object such as a nail is pierced and penetrated into the tubeless tire 100, the acrylic pressure-sensitive adhesive firmly adheres to the portion of the pierced sharp body protruding into the internal space of the tubeless tire 100. Then, when the sharp body is pulled out, the acrylic pressure-sensitive adhesive attached to the sharp body enters the through hole. Further, when the sharp body is removed and the through hole is formed, the acrylic adhesive present on the inner surface 1A of the tubeless tire 100 is pushed into the through hole by the internal pressure of the tubeless tire 100. As a result, the through hole is blocked by the acrylic pressure-sensitive adhesive. In this way, the puncture resistance is reliably imparted to the tubeless tire 100.

In the puncture-resistant sheet 3, the first acrylic pressure-sensitive adhesive layer 24 of the first pressure-sensitive adhesive sheet 22 arranged on the inner space side of the tubeless tire 100 is made of a white acrylic pressure-sensitive adhesive. Therefore, when the sharp body is removed, it is possible to easily visually check the state where the acrylic adhesive has entered the through hole and the through hole is blocked. The appearance of puncture resistance can be grasped.

The first acrylic pressure-sensitive adhesive layer 24 is exposed on the inner space side of the tubeless tire 100. For this reason, when a sharp object such as a nail is pierced and penetrated into the tubeless tire 100, the acrylic pressure-sensitive adhesive firmly adheres to the portion of the pierced sharp body protruding into the internal space of the tubeless tire 100. Then, when the sharp body is pulled out, the acrylic pressure-sensitive adhesive attached to the sharp body enters the through hole. Further, when the sharp body is removed and the through hole is formed, the acrylic adhesive present on the inner surface 1A of the tubeless tire 100 is pushed into the through hole by the internal pressure of the tubeless tire 100. As a result, the through hole is blocked by the acrylic pressure-sensitive adhesive. In this way, the puncture resistance is reliably imparted to the tubeless tire 100.

FIG. 8 shows a puncture-resistant sheet according to the second embodiment. In this example, the puncture-resistant sheet 3 is composed of the second pressure-sensitive adhesive sheet 11 in which the second acrylic pressure-sensitive adhesive layers 14 a and 14 b are formed on both surfaces of the second base film 13. In the second pressure-sensitive adhesive sheet 11 in this example, the second acrylic pressure-sensitive adhesive layers 14a and 14b formed on both surfaces of the second base film 13 each have a thickness of about 4 mm. Therefore, the thickness of the acrylic adhesive is about 8 mm in total as the whole puncture-resistant sheet 3. The second pressure-sensitive adhesive sheet 11 is attached to the inner surface 1A of the tubeless tire 100.

According to the second embodiment, the trouble of laminating a plurality of adhesive sheets can be saved. Other than that, there exists an effect similar to the said 1st Embodiment.

Next, a puncture repair method for the tubeless tire 100 according to an embodiment of the present invention will be described. FIG. 9 is a diagram illustrating a puncture repair method according to an embodiment.

In this method, the above-described puncture-resistant sheet 3 is adhered to the inner surface 1A of the tubeless tire 100 in advance. Then, when a sharp body such as a nail penetrates the tubeless tire 100, the tip from the outer side (outer surface 1 </ b> B side) of the tubeless tire 100 is scraped to the tip of the through hole 31 after removing the sharp body penetrating the tubeless tire 100. The scraping member 32 formed with the gathering portion 32a is inserted, and the acrylic adhesive present on the inner surface 1A of the tubeless tire 100 is scraped toward the through hole 31 by the scraping portion 32a.

That is, the tubeless tire puncture repair method according to the present embodiment includes the puncture-resistant sheet 3 provided with the first base film 23 and the first acrylic pressure-sensitive adhesive layer 24 on the inner surface 1A of the tubeless tire 100. The step of attaching the puncture sheet 3 on the first base film 23 side, the step of removing the sharp body penetrating the tubeless tire 100 with the puncture-resistant sheet 3 attached to the inner surface 1A, and the sharp body were removed. A scraping member 32 having a scraping portion 32a formed at the tip from the outer surface 1B side of the tubeless tire 100 is inserted into the subsequent through hole 31, and the acrylic constituting the first acrylic adhesive layer 24 by the scraping portion 32a. And a step of scraping the system adhesive toward the through hole 31.

In this example, the scraping member 32 is formed by bending the tip of a metal rod-like body into a bowl shape to form a scraping portion 32a. The tip of the scraping portion 32a is preferably flattened and spatulated so that the acrylic adhesive can be easily scraped. A grip is attached to the base.

In the present embodiment, a scraping member 32 having a scraping portion 32a formed at the tip thereof is inserted into the through hole 31 after the sharp body penetrating the tubeless tire 100 is removed from the outside of the tubeless tire 100. Then, the acrylic adhesive present on the inner surface 1A of the tubeless tire 100 is scraped toward the through hole 31 by the scraping portion 32a.

In this way, when the scraping member 32 is removed from the through hole 31, the acrylic adhesive present on the inner surface 1A of the tubeless tire 100 adheres to the scraping member 32 and enters the through hole 31. In this way, the through hole 31 is closed by the acrylic adhesive. Therefore, even if a thick pointed body is pierced into the tubeless tire 100 and the large through hole 31 is present, the through hole 31 can be reliably closed with the acrylic adhesive.

FIG. 10 is a diagram for explaining another example of the puncture repair method. In this method, the above-described puncture-resistant sheet 3 is attached to the inner surface 1A of the tubeless tire 100 in advance. When a sharp body such as a nail penetrates the tubeless tire 100, a retaining portion 41a is formed at the tip from the outside of the tubeless tire 100 in the through hole 31 after the sharp body penetrating the tubeless tire 100 is removed. The plug member 41 thus inserted is inserted, and the acrylic pressure-sensitive adhesive present on the inner surface 1A of the tubeless tire 100 is adhered to close the through hole 31.

In this example, the plug member 41 is formed by forming a plurality of umbrella-shaped retaining portions 41a at the tip of a resin rod-like body. A finger holding portion 41b is formed at the base when the plug member 41 is pushed into the through hole 31. Further, a rod-like portion 41 c is secured between the finger holding portion 41 b and the retaining portion 41 a, and this portion corresponds to the thickness of the tubeless tire 100. The retaining portion 41a deformed when the plug member 41 is pushed in projects into the tubeless tire 100, and the deformation is restored. The acrylic pressure-sensitive adhesive adheres to the retaining portion 41a that spreads inside.

In this example, a plug member 41 having a retaining portion 41a formed at the tip is inserted from the outside of the tubeless tire 100 into the through hole 31 after the sharp body penetrating the tubeless tire 100 is removed. And the acrylic adhesive which exists in the inner surface 1A of the said retaining part 41a and the tubeless tire 100 is adhere | attached.

By doing in this way, the through hole 31 is closed by the plug member 41, and the acrylic pressure-sensitive adhesive present on the inner surface 1A of the tubeless tire 100 adheres to the retaining portion 41a so that air does not leak. Therefore, even if a thick pointed body pierces the tubeless tire 100 and has a large through hole 31, the through hole 31 can be reliably closed.

It should be understood that the embodiment disclosed herein is illustrative in all respects and is not restrictive in any way. The scope of the present invention is defined by the scope of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the scope of the claims.

The puncture-resistant sheet for tubeless tires, the tubeless tire, and the puncture repair method for tubeless tires according to the present invention can be applied to tubeless tires for various vehicles.

1 tire body, 1A inner surface, 1B outer surface, 1C tread, 2 carcass, 3 puncture resistant sheet, 4 bead, 11 second adhesive sheet, 13 second substrate film, 14a, 14b second acrylic adhesive layer , 15 2nd release film, 22 1st adhesive sheet, 23 1st substrate film, 24 1st acrylic adhesive layer, 25 1st release film, 31 through hole, 32 scraping member, 32a Scraping portion, 41 plug member, 41a retaining portion, 41b finger holding portion, 41c rod-shaped portion, 91, 92 release film, 100 tubeless tire.

Claims (7)

A puncture-resistant sheet for a tubeless tire to be attached to the inner surface of the tubeless tire,
A first substrate film;
A puncture-resistant sheet comprising: a first acrylic pressure-sensitive adhesive layer laminated on the first base film. The puncture-resistant sheet according to claim 1, further comprising an adhesive portion to be bonded to the inner surface of the tubeless tire on the opposite side of the first base film from the first acrylic pressure-sensitive adhesive layer. The adhesive portion is
A second substrate film;
The puncture-resistant sheet | seat of Claim 2 provided with the 2nd acrylic adhesive layer laminated | stacked on the said 2nd base film. The puncture-resistant sheet according to claim 3, wherein the second acrylic pressure-sensitive adhesive layer is laminated on both surfaces of the second base film. The puncture-resistant sheet according to claim 3 or 4, wherein the second acrylic pressure-sensitive adhesive layer and the first base film are bonded together. The tire body,
A puncture-resistant sheet portion disposed on the inner surface of the tire body,
The puncture-resistant sheet portion is the puncture-resistant sheet according to any one of claims 1 to 5,
A tubeless tire in which the first base film side is attached to the inner surface. A step of attaching the puncture-resistant sheet according to any one of claims 1 to 5 to the inner surface of a tubeless tire on the first base film side;
Removing the sharp body penetrating the tubeless tire having the anti-puncture sheet attached to the inner surface;
A scraping member having a scraping portion formed at the tip from the outer surface side of the tubeless tire is inserted into the through hole after the sharp body is removed, and the first acrylic pressure-sensitive adhesive layer is formed by the scraping portion. A method of puncturing a tubeless tire, comprising: a step of scraping an acrylic pressure-sensitive adhesive to be configured toward the through hole.

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