WO2002085649A1 - Pneumatique auto-obturateur et procede de fabrication associe - Google Patents

Pneumatique auto-obturateur et procede de fabrication associe Download PDF

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Publication number
WO2002085649A1
WO2002085649A1 PCT/JP2002/002498 JP0202498W WO02085649A1 WO 2002085649 A1 WO2002085649 A1 WO 2002085649A1 JP 0202498 W JP0202498 W JP 0202498W WO 02085649 A1 WO02085649 A1 WO 02085649A1
Authority
WO
WIPO (PCT)
Prior art keywords
tire
layer
adhesive
outer peripheral
self
Prior art date
Application number
PCT/JP2002/002498
Other languages
English (en)
Japanese (ja)
Inventor
Mitsuru Naito
Hidekazu Takeyama
Satoshi Makino
Yasuhiro Miyatani
Takayuki Toyoshima
Original Assignee
The Yokohama Rubber Co., Ltd.
Honda Giken Kogyo Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Yokohama Rubber Co., Ltd., Honda Giken Kogyo Kabushiki Kaisha filed Critical The Yokohama Rubber Co., Ltd.
Publication of WO2002085649A1 publication Critical patent/WO2002085649A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
    • B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
    • B29C73/16—Auto-repairing or self-sealing arrangements or agents
    • B29C73/22—Auto-repairing or self-sealing arrangements or agents the article containing elements including a sealing composition, e.g. powder being liberated when the article is damaged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B60C19/12—Puncture preventing arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B60C19/12—Puncture preventing arrangements
    • B60C19/122—Puncture preventing arrangements disposed inside of the inner liner
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
    • B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
    • B29D2030/0686—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre
    • B29D2030/0695—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre the sealant being in the form of one wide strip, e.g. a patch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00—Pneumatic or solid tyres or parts thereof

Definitions

  • the present invention relates to a self-sealing device having a self-sealing function that does not leak air in a tire by closing a punctured hole when a nail is punctured by a nail or the like penetrating into a crown portion during running of a vehicle and the tire is punctured. And a method of manufacturing the same.
  • this type of tire has a problem that when the tire rotates at a high speed, the adhesive flows toward the center of the crown portion due to centrifugal force, so that it cannot cope with blocking of a puncture hole near a part of the shoulder.
  • Japanese Patent Application Laid-Open No. 54-62006 discloses that a puncture layer is formed by attaching a sponge layer impregnated with the same adhesive material as described above to the inner surface of a tire crown.
  • a self-sealing tire has been proposed.
  • a puncture seal layer is formed by impregnating the inside of the sponge layer with a pressure roller from the surface of the sponge layer while rotating the tire. . Therefore, in order to sufficiently impregnate the adhesive material into the sponge layer so as to reach the inner surface of the tire, it is necessary to apply a high pressing force while tying the adhesive at a low rotation speed. It is necessary to rotate the key. As a result, there was a problem that the work of impregnating the adhesive took time and the workability was poor.
  • the adhesive since the adhesive is exposed on the surface of the sponge layer, dust and foreign matters adhere to the surface during transportation and storage, and the appearance is deteriorated.In addition, the adhesive is applied to workers' hands and equipment during tire handling. There is difficulty in handling due to adhesion.
  • An object of the present invention is to provide a self-sealing tire excellent in handling property, in which no adhesive material moves during running of a vehicle, workability during forming of a puncture seal layer is good, and appearance is not deteriorated, and its production. In providing a method.
  • the self-sealing tire of the present invention that achieves the above object is a self-sealing tire in which a puncture layer is mounted on the entire inner wall surface of a tire from one shoulder part to the other shoulder part of a pneumatic tire.
  • the puncture layer is formed by providing an adhesive layer made of an adhesive material adhered to the inner wall surface of the tire on the outer peripheral surface of an annular sponge layer impregnated with an adhesive material so as to be exposed on the outer peripheral surface side.
  • the method for manufacturing a self-sealing tire according to the present invention is a method for manufacturing a self-sealing tire in which a puncture seal layer is mounted on the entire inner wall surface of a tire from one shoulder part to the other shoulder part of a pneumatic tire.
  • a puncture seal layer is mounted on the entire inner wall surface of a tire from one shoulder part to the other shoulder part of a pneumatic tire.
  • Another method of manufacturing a self-sealing tire according to the present invention is a self-sealing tire having a puncture layer mounted on the entire inner wall surface of a pneumatic tire from a part of a shoulder to a part of the other shoulder.
  • a method for manufacturing a tire comprising: from the outer peripheral surface side of an annular sponge layer having an outer peripheral length Ls that is 1.1 to 1.3 times the outer peripheral length Lt of the tire at the center line of the pneumatic tire.
  • An adhesive material is impregnated to form an adhesive material-impregnated sponge layer in which the adhesive material is exposed on the outer peripheral surface side, and at the same time, an adhesive layer made of the adhesive material is integrally formed on the outer peripheral surface of the adhesive material impregnation layer. Formed into 1
  • a tire layer is formed, and the adhesive layer is bonded to the inner wall surface of the tire via the adhesive layer.
  • the sponge layer is impregnated with the adhesive material that seals the puncture hole, the adhesive material is prevented from flowing toward the center of the crown due to the centrifugal force during vehicle running. be able to. Therefore, a puncture hole near the shoulder can be closed.
  • the adhesive since the adhesive is exposed on the outer peripheral surface of the sponge layer and impregnated so that the adhesive is not exposed on the inner peripheral surface, dust and foreign matter are deposited on the inner peripheral surface of the sponge layer during transportation or storage. Adhesion can be prevented. Therefore, the appearance does not deteriorate. Furthermore, since the adhesive does not adhere to the hands and devices of the worker when handling the tire, the handling of the tire becomes easy.
  • the sponge layer is impregnated with the adhesive material in advance, and by specifying the outer peripheral length Ls of the sponge layer within the above range, when the puncture seal layer is attached to the tire inner wall surface, the compressed sponge layer is Returns to its original size By doing so, the puncture seal layer can be pressed against the inner wall surface of the tire. Therefore, the puncture seal layer can be easily and firmly adhered to the inner wall surface of the tire without performing a pressing operation by applying a large pressing force from the outside with a pressing roller or the like. Therefore, workability can be improved.
  • FIG. 1 is a tire meridian half sectional view showing an example of the self-sealing tire of the present invention.
  • FIG. 2 is an enlarged sectional view of a portion indicated by an arrow A in FIG.
  • FIG. 3 is a perspective view of an annular sponge layer before mounting a puncture seal layer.
  • FIG. 4 is a schematic view showing a step of forming a puncture layer in the method for producing a self-sealing tire of the present invention.
  • FIG. 5 is an enlarged sectional view of a main part showing another example of the puncture seal layer mounted on the self-sealing tire of the present invention.
  • FIG. 6 is a schematic view showing a step of forming the puncture seal layer of FIG.
  • a self-sealing tire of the present invention includes a pneumatic tire 1 and a puncture seal mounted over the entire surface of a tire inner wall surface 1X from one shoulder portion S to the other shoulder portion S of the pneumatic tire 1. And layers.
  • the pneumatic tire 1 has a crown P 11, left and right sidewall portions 12, and left and right bead portions 13.
  • a car layer 14 is mounted between the left and right bead sections 13, and both ends 14 a are embedded in the bead section 13.
  • the core is folded from inside to outside around the core 15.
  • a plurality of belt layers 16 are provided on the outer peripheral side of the force / waste layer 14 of the crown portion 11.
  • the puncture seal layer 2 is formed in an annular shape and, as shown in FIG. 2, is impregnated with a high-viscosity adhesive X as a seal material so as to be exposed on the outer peripheral surface side without being exposed on the inner peripheral surface side.
  • the outer surface 3a of the sponge layer 3 is provided with an adhesive layer 4 made of an adhesive material that adheres to the tire inner wall surface 1X.
  • the adhesive of the adhesive layer 4 is made of the same high-viscosity adhesive composition as the adhesive X impregnated in the sponge layer 3, and the adhesive layer 4 is integrally formed on the outer peripheral surface 3a of the sponge layer 3. .
  • the sponge layer 3 formed in an annular shape has an outer peripheral length Ls before the puncture layer is attached and a tire outer peripheral length Lt on the center line CL of the pneumatic tire 1.
  • Ls outer peripheral length
  • Lt tire outer peripheral length
  • the self-sealing tire having the puncture seal layer 2 described above is manufactured as follows.
  • a pair of adhesive X discharged from the discharge port 6 of the adhesive extruder is applied to the outer peripheral surface 3a of the preformed annular sponge layer 3 rotated by the rollers 1 and 5.
  • One round of pressure is applied successively by rollers 1 and 7.
  • the adhesive X is impregnated into the sponge layer 3 from the outer peripheral surface 3a side to form the adhesive impregnated sponge layer 3 'in which the adhesive X is exposed to the outer peripheral surface.
  • the compression is released and the puncture seal layer 2 is bonded to the tire inner wall surface 1X via the bonding layer 4.
  • the sponge layer 3 is compressed, and the seal layer 2 becomes the inner wall surface 1X of the tire. Attached to.
  • the puncture layer 2 is pressed against the inner wall 1X of the tire by the compressed sponge layer 3 which is to be restored to the original size, so that the puncture layer can be compressed without applying a large pressing force from the outside and crimping. Layer 2 firmly adheres to the tire inner wall surface 1X.
  • the sponge layer 3 is impregnated with the adhesive X used for the ink seal layer 2, the flow of the adhesive X due to centrifugal force during running of the vehicle can be prevented. Therefore, since the adhesive X does not flow toward the center of the crown 11, the puncture sealing property can be exhibited even near the shoulder S.
  • the adhesive X is impregnated so as to be exposed on the outer peripheral surface side of the sponge layer 3 and is not exposed on the inner peripheral surface side, no dust or foreign matter adheres during transportation or storage. Therefore, the appearance does not deteriorate. In addition, there is no sticking material to workers' hands and equipment when handling tires, so handling is improved.
  • the adhesive material X is impregnated in the sponge layer 3 in advance, and the puncture layer 2 is made to be a tire in order to make the outer peripheral length Ls of the sponge layer 3 longer than the outer peripheral length Lt of the tire as described above.
  • the puncture layer 2 is pressed against the tire inner wall surface 1X, and the outer surface is pressed by a pressing roller or the like.
  • the puncture seal layer 2 can be easily and firmly adhered to the tire inner wall surface 1X without performing an operation of applying a large pressing force and pressing the tire. Therefore, good workability can be obtained.
  • the puncture seal layer 2 is firmly adhered to the tire inner wall 1X by the restoring force of 3. It becomes difficult to perform puncture and the puncture sealability deteriorates. Conversely, if it is larger than 1.3 Lt, the sponge layer 3 is too long in circumference, so that the sponge layer 3 is partially bent to the inner peripheral side, resulting in insufficient adhesion and a nail or the like being stuck. When this occurs, the portion peels off from the tire inner wall surface 1X, causing a decrease in puncture sealability.
  • FIG. 5 shows another example of the puncture layer used in the self-sealing tire of the present invention.
  • the adhesive layer 4 is made of an adhesive Y having a high-viscosity sealing property and made of an adhesive composition different from the adhesive X.
  • such a puncture seal layer 2 was discharged from the discharge port 6 of the first adhesive extruder onto the outer peripheral surface 3a of the annular sponge layer 3 rotated by the rollers 5, 5.
  • Adhesive material X is pressed sequentially by a pair of rollers 7,7.
  • the adhesive X is impregnated into the sponge layer 3 from the outer peripheral surface 3a side, and the adhesive impregnated sponge layer 3 'in which the adhesive X is exposed to the outer peripheral surface is sequentially formed.
  • the adhesive Y discharged from the discharge port 8 of the first adhesive extruder is sequentially pressed against the outer peripheral surfaces 3 and a of the adhesive-impregnated sponge layer 3 by a pair of rotating rollers 19 and 9.
  • the adhesive layer 4 is sequentially formed on the outer peripheral surfaces 3 and a.
  • the puncture seal layer 2 is formed by pressure-bonding the adhesives X and Y to the sponge layer 3 once.
  • the puncture seal layer 2 thus formed is adhered to the sunset side wall surface 1X in the same manner as described above.
  • the adhesive layer 4 is formed on the tire inner wall surface IX, and the adhesive impregnated sponge layer 3 is bonded to the adhesive layer 4. , May be formed. Further, the adhesive layer 4 may be formed using the adhesive X as a matter of course.
  • the thickness of the sponge layer 3 before the mounting of the puncture layer and the impregnation depth of the adhesive X impregnating the sponge layer 3 can be appropriately selected according to the size of the pneumatic tire to be mounted. it can. From the viewpoint of preventing an excessive increase in tire weight and good sealing properties, it is preferable to set the thickness t of the sponge layer 3 to 5 to 15 mm and the impregnation depth h of the adhesive X to 4 to 12 mm. . Further, the impregnation amount of the adhesive X is preferably set to 0.1 to 0.5 g / cm 3 .
  • a rubber having continuous bubbles that can be impregnated with the adhesive X, or a foam of a resin such as polyurethane or nylon can be preferably used.
  • a foam of a resin such as polyurethane or nylon
  • an open-cell ether polyurethane foam is used.
  • the pressure-sensitive adhesive composition used for the pressure-sensitive adhesive X it is preferable to use a mixture of an elastomer, a low-molecular-weight oligomer such as amorphous polyolefin, paraffin oil, or liquid bolybdenum, and a resin such as petroleum resin.
  • a low-molecular-weight oligomer such as amorphous polyolefin, paraffin oil, or liquid bolybdenum
  • a resin such as petroleum resin.
  • the elastomer for example, the use of at least one elastomer selected from the group consisting of butyl rubber, polyisobutylene, natural rubber, isoprene rubber, and polybutene is used. It is preferable to enhance the performance.
  • the adhesive layer 4 is also formed by the adhesive material X, a mixture of the above-mentioned elastomer and a low molecular weight oligomer such as liquid polybutene or a resin such as a petroleum resin can be used.
  • a low molecular weight oligomer such as liquid polybutene or a resin such as a petroleum resin
  • the same one as in the case where the bonding layer 4 is also formed by the pressure-sensitive adhesive X can be used.
  • Adhesives X and Y may be blended with an appropriate crosslinking agent or vulcanizing agent to impart heat resistance to the adhesive. For example, when butyl rubber or polybutene is used, ⁇ -quinone dioxime can be combined.
  • the pressure-sensitive adhesives X and ⁇ are preferably composed of a pressure-sensitive adhesive composition that does not contain a solvent, and the viscosity thereof is preferably adjusted to about 1000 OPas.
  • the sponge layer was composed of an open-cell polyester polyurethane foam
  • the adhesive used was a composition mainly composed of butyl rubber and liquid polybutene.
  • the thickness t of the sponge layer and the impregnation depth h of the adhesive are as shown in Table 1, respectively.
  • Each test tire was mounted on a rim with a rim size of 15 X 6 JJ, the air pressure was set to 100 kPa, and puncture seal performance evaluation tests were performed under the following measurement conditions. The result was obtained.
  • the comparative tires 1 and 2 in which the outer peripheral length Ls of the sponge layer is out of the range of the present invention have impaired puncture sealing performance. Therefore, in order to improve the operability without impairing the puncture seal performance and applying a large pressing force from outside to improve the workability, the outer peripheral length Ls of the sponge layer should be made larger than the tire peripheral length Lt. It is clear that it is better to increase the value by 1.1 to 1.3 times.
  • the sponge layer is impregnated with the adhesive used for the puncture seal layer, it is possible to prevent the adhesive from flowing toward the center of the crown due to centrifugal force during vehicle running. Can be.
  • the puncture seal can be performed without applying a large pressing force from the outside with a pressing roller or the like. Workability is improved because the layer can be easily and firmly adhered to the tire inner wall surface.
  • the present invention having the above-described excellent effects has a self-sealing function that closes a puncture hole and prevents the air of the tire from leaking to the outside when a nail or the like penetrates through the crown portion during running of the vehicle and the tire is punctured. Selfie having-can be used very effectively.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

L'invention concerne un pneumatique auto-obturant comprenant une couche obturatrice de crevaison installée sur toute la surface de la paroi intérieure d'un pneumatique allant d'une partie d'épaulement à l'autre, dans lequel la partie obturatrice de crevaison est formée par installation d'une couche adhésive elle même formée d'un matériau adhésif collé à la surface de la paroi intérieure du pneumatique sur la surface périphérique extérieure d'une couche éponge annulaire imprégnée du matériau adhésif de façon à être exposée sur le côté de la surface périphérique extérieure du pneumatique, la relation entre la longueur périphérique extérieure (Ls) de la couche spongieuse, avant installation de la couche obturatrice de crevaison, et la longueur périphérique extérieure (Lt) du pneumatique selon une ligne centrale est représentée par 1,1 Lt ≤ Ls ≤ 1,3 Lt.
PCT/JP2002/002498 2001-04-20 2002-03-15 Pneumatique auto-obturateur et procede de fabrication associe WO2002085649A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2001121929 2001-04-20
JP2001-121929 2001-04-20
JP2002063320 2002-03-08
JP2002-63320 2002-03-08

Publications (1)

Publication Number Publication Date
WO2002085649A1 true WO2002085649A1 (fr) 2002-10-31

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003076214A1 (fr) * 2002-03-08 2003-09-18 The Yokohama Rubber Co.,Ltd. Pneu auto-obturant et procede de fabrication associe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5291903U (fr) * 1975-12-29 1977-07-09
JPS5350905U (fr) * 1976-10-05 1978-04-28
JPS546206A (en) * 1977-06-14 1979-01-18 Bridgestone Corp Pneumatic tire with puncture preventive layer
EP0021255B1 (fr) * 1979-06-25 1984-03-21 Price, Donald Rex Garniture protectrice intérieure pour pneumatique et procédé de fabrication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5291903U (fr) * 1975-12-29 1977-07-09
JPS5350905U (fr) * 1976-10-05 1978-04-28
JPS546206A (en) * 1977-06-14 1979-01-18 Bridgestone Corp Pneumatic tire with puncture preventive layer
EP0021255B1 (fr) * 1979-06-25 1984-03-21 Price, Donald Rex Garniture protectrice intérieure pour pneumatique et procédé de fabrication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003076214A1 (fr) * 2002-03-08 2003-09-18 The Yokohama Rubber Co.,Ltd. Pneu auto-obturant et procede de fabrication associe
US7195683B2 (en) 2002-03-08 2007-03-27 The Yokohama Rubber Co., Ltd. Self-seal tire and its producing method

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