WO2019116627A1 - Pneumatique - Google Patents

Pneumatique Download PDF

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Publication number
WO2019116627A1
WO2019116627A1 PCT/JP2018/027381 JP2018027381W WO2019116627A1 WO 2019116627 A1 WO2019116627 A1 WO 2019116627A1 JP 2018027381 W JP2018027381 W JP 2018027381W WO 2019116627 A1 WO2019116627 A1 WO 2019116627A1
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WO
WIPO (PCT)
Prior art keywords
tire
inner liner
pneumatic tire
carcass
joint portion
Prior art date
Application number
PCT/JP2018/027381
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English (en)
Japanese (ja)
Inventor
裕也 森田
純一 折出
Original Assignee
株式会社ブリヂストン
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 株式会社ブリヂストン filed Critical 株式会社ブリヂストン
Priority to JP2019558893A priority Critical patent/JP7063917B2/ja
Publication of WO2019116627A1 publication Critical patent/WO2019116627A1/fr

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    • 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
    • B60C5/00—Inflatable pneumatic tyres or inner tubes
    • B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
    • B60C5/14—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre

Definitions

  • the present disclosure relates to a pneumatic tire.
  • an unvulcanized rubber sheet to be an inner liner of a product tire is wound around the outer peripheral surface of a drum to form a cylindrical shape, and the cylindrically formed rubber sheet is vulcanized can Semi-cure in the Next, the semi-vulcanized inner liner (so-called precure inner liner) is removed from the drum and mounted on a tire-forming drum, and then a carcass, bead core, bead filler, belt, tread rubber, side rubber, etc. are attached to make a cylindrical shape.
  • a green tire is molded, and the inside of the green tire is filled with gas and expanded on a tire forming drum, and each member is crimped to obtain a green tire having a shape close to that of a product tire.
  • this green tire is loaded into a vulcanizing molding machine without bladders, and the inside of the tire is directly filled with a gas for expansion and heating, whereby the green tire is vulcanized and formed.
  • the tread of the green tire may be deformed to undulate in the circumferential direction, and there is room for improvement.
  • the present disclosure aims to provide a pneumatic tire having a structure capable of suppressing deformation of a green tire before vulcanization.
  • a carcass extending from one bead portion to the other bead portion and having an end portion locked to the bead core is attached to the inner circumferential surface of the carcass, and one side in the circumferential direction And an inner liner provided with a joint portion in which the side end and the other end overlap each other and the residual tension acting inside is in the range of 1 to 3 N / mm.
  • the residual tension acting on the inner liner is set in the range of 1 to 3 N / mm in the product state, the diameter growth during traveling is suppressed. Since distortion is relieved, it is advantageous to the crack of the groove bottom and the belt end of the groove provided in the tread.
  • the unvulcanized rubber inner liner plastically deforms when force is applied, and does not have elasticity like vulcanized rubber.
  • the semi-vulcanized inner liner elastically deforms like a vulcanized rubber when force is applied, and tries to return to the original shape when the force is removed.
  • the inner liner When the green raw tire in which the semi-vulcanized inner liner is attached to the inner circumferential surface of the carcass is expanded to a shape close to the product tire, the inner liner is elastically deformed (in other words, distorted) and the inner liner is made Although tension is generated inside, the rubber members other than the inner liner are unvulcanized and thus only plastically deform and tension does not act inside (minimum even if tension is acting).
  • the tension generated in the inflated inner liner (referred to as residual tension as appropriate) is too large, the tire constituting members such as the carcass disposed on the outer side of the inner liner receive a large force in the direction of diameter reduction. As a result, the outer peripheral surface is deformed in a wavelike manner.
  • the residual tension acting on the inner liner is set to 3 N / mm or less.
  • the residual tension acting on the semi-vulcanized inner liner in the unvulcanized green tire is also suppressed, and the deformation of the unvulcanized green tire on which the semi-vulcanized inner liner is attached can be suppressed.
  • the residual tension of the inner liner of the pneumatic tire of a product is measured, it will be understood that the green tire is manufactured without deformation at the time of manufacturing the tire.
  • the inner circumferential surface of the green tire is pressed by the bladder by the expansion of the rubber bladder, and the inner liner presses the carcass.
  • the rubber of the bladder is a vulcanized rubber, which is harder and more elastic than unvulcanized rubber.
  • the bladder can uniformly press the entire inner liner, and the joint portion in which the end portions of the carcass overlap one another can reliably receive the pressing force of the bladder through the inner liner. Therefore, one end of the carcass and the other end are strongly pressed to crush the rubber of the joint (unvulcanized rubber covering the cord of the carcass) and the step amount at the joint (joint) Thickness-the thickness of the inner liner can be kept small.
  • an inner liner provided on the inner circumferential surface of a green tire substitutes for the bladder.
  • the inner liner is expanded under the pressure of the gas to supply the gas directly when the green tire is supplied, and the inner liner cures the outer member. Press toward the inner surface of the mold of the molding machine.
  • the joint portion of the carcass is pressed by the inner liner, but if the inner liner is not vulcanized, the unvulcanized rubber of the inner liner hits the joint portion of the carcass and flows when the inner liner expands. Do. Therefore, the pressing force acting on the joint portion escapes and the pressing force on the joint portion decreases, so that it is difficult to crush the rubber of the joint portion, and it becomes difficult to reduce the step amount in the joint portion.
  • the inner liner of the green tire before vulcanization close to the product shape is in a semi-vulcanized state, and the rubber like vulcanized rubber It turns out that it has elasticity.
  • the unvulcanized inner liner when the unvulcanized inner liner is expanded in diameter to form a green tire having a shape close to the product, the unvulcanized rubber of the inner liner plastically deforms, so tension does not remain inside the inner liner. Also, no tension remains (even if it remains) in the inner liner of the pneumatic tire of a product obtained by vulcanizing and molding this green tire.
  • the entire carcass can be uniformly pressed by the inner liner having rubber elasticity at the time of vulcanization. It is possible to reduce the step amount at the joint portion.
  • pressing force can be uniformly applied from the inner periphery of the tire toward the outer periphery of the tire to the entire tire constituting member on the tire radial direction outer side of the inner liner (so-called ironing effect).
  • the air gap in the tire can be squeezed to suppress air in the tire.
  • the above-described configuration has an excellent effect that deformation of a green tire before vulcanization can be suppressed.
  • BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing along the rotating shaft which shows the pneumatic tire concerning one Embodiment of this invention. It is a top view of the inner liner which stuck the strain gauge. It is a top view of the inner liner which shows a measurement field. It is a longitudinal cross-sectional view which shows the vulcanizing molding machine for vulcanizing and forming the pneumatic tire of this invention. It is a longitudinal cross-sectional view which shows the vulcanizing molding machine for vulcanizing and forming the pneumatic tire of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing orthogonal to the tire rotating shaft which shows the inner liner of a pneumatic tire.
  • the pneumatic tire 10 according to an embodiment of the present invention is a general radial pneumatic tire for a passenger car, and includes a pair of bead cores 12, a carcass core straddling one bead core 12 and the other bead core 12. 14, inner liner 16 disposed on the inner peripheral surface of carcass 14, bead filler 18 disposed on the outer side in the tire radial direction of bead core 12, belt 20 disposed on the radial outer side of carcass 14, tire radial direction of belt 20 A tread rubber layer 22 disposed outside, a side rubber layer 24 disposed outside the carcass 14 in the tire width direction, and the like are provided.
  • the carcass 14 has a general structure in which a plurality of carcass cords arranged in parallel to one another are coated with a covering rubber.
  • the belt 20 of the present embodiment is composed of two belt plies, and the belt plies have a general structure in which a plurality of belt cords arranged in parallel to each other are coated with a covering rubber.
  • a drainage groove 25 is formed on the tread surface of the tread rubber layer 22.
  • well-known tire structural members other than the above may be provided.
  • the inner liner 16 is in a free state (a state in which no external force is applied by a single tire. A state in which the tire is attached to a rim and an internal pressure may not be applied). A residual tension of 1 to 3 N / mm is acting.
  • the residual tension acting on the inner liner 16 can be measured, for example, as follows.
  • a notch 28 is made by a cutter or the like in the portion of the inner liner 16 indicated by a two-dot chain line so as to surround the strain gauge 26 to form a rectangular measurement area 30.
  • the direction of the cuts 28 is, for example, the tire circumferential direction (arrow S direction) and the tire width direction (arrow W direction). Further, the depth of the incisions 28 is set to reach the carcass 14 or more, that is, the gauge of the inner liner 16 or more.
  • the inner liner 16 of the measurement area 30 may be cut out of the pneumatic tire 10 (i.e. cut away from the carcass 14).
  • FIG. 3A a schematic configuration of a vulcanizing molding machine 38 used to manufacture the pneumatic tire 10 will be described.
  • the vulcanizing molding machine 38 is provided with a sector mold 40 which is divided into a plurality of pieces in the circumferential direction. Segments 42 are attached to the outer peripheral surface of the sector mold 40. The outer circumferential surface of the segment 42 is tapered so that the segment 42 is tapered upward.
  • An upper mold 44 is disposed on the upper side inside the sector mold 40, and a lower mold 46 is disposed on the lower side.
  • the upper base ring 48 for curing one bead portion 10A of the green tire 36 is attached to the lower surface inside of the upper mold 44, and the other bead portion 10A is vulcanized on the upper surface inside of the lower mold 46
  • the lower base ring 50 is attached.
  • the upper mold 44 is closely attached to the lower surface of the upper platen 52
  • the lower mold 46 is closely attached to the upper surface of the lower platen 54.
  • a container 56 is disposed outside the segment 42.
  • the inner peripheral surface of the container 56 is tapered so as to expand in diameter as it goes downward, and slides on the outer peripheral surface of the segment 42.
  • Steam or the like is circulated in the container 56. When steam is passed through the container 56, the container 56 is heated, and the heat of the container 56 is transferred to the sector mold 40 via the segment 42.
  • a center support device 58 is disposed at the center of the vulcanizing and molding machine 38.
  • An upper ring 60 is disposed in the center support device 58, and the upper ring 60 and the upper base ring 48 can hold the upper bead portion 10A of the green tire 36.
  • the lower ring 62 is attached to the lower side of the upper ring 60 in the center support device 58, and the lower ring 62 and the lower base ring 50 can hold the lower bead portion 10A of the green tire 36. ing.
  • the upper surface of the upper ring 60 and the lower surface of the lower ring 62 are in close contact with the inner liner 16 on the inner peripheral side of the bead portion 10A, whereby the inside of the green tire 36 is sealed (see FIG. 3B).
  • a heating fluid such as steam can be jetted out from between the upper ring 60 and the lower ring 62 into the sealed inside of the green tire 36.
  • the semi-vulcanized inner liner 16 can be inflated and the green tire 36 can be heated from the inside.
  • the semi-vulcanized cylindrical rubber sheet 34 is mounted on the outer peripheral surface of the tire forming drum 32 (see FIG. 5).
  • a carcass, a bead core, a bead filler, a belt, a tread rubber, and a side rubber (all unvulcanized) Etc. to form a cylindrical green tire 36.
  • the inside of the green tire 36 is filled with gas and expanded on the tire forming drum 32, and both bead portions are made to approach each other, and finally, as shown in FIG.
  • the raw tire 36 has a shape close to that of the product tire.
  • the outer diameter of the central portion in the tire width direction of the green tire 36 after diameter expansion shown in FIG. 7 is greater than the outer diameter of the central portion in the tire width direction of the green tire 36 before diameter expansion shown in FIG.
  • the diameter is also expanded by 60%.
  • a green tire 36 having a shape close to that of a product tire is loaded into a bladder-free vulcanization molding machine 38, and the inside of the tire is directly filled with gas to expand and heat while being expanded. Perform molding.
  • the outer diameter of the central portion in the tire width direction of the pneumatic tire 10 of the product is expanded by 3% as compared with the outer diameter of the green tire 36 having a shape close to the product before loading into the vulcanizing molding machine 38 It is diameter.
  • the residual tension acting on the inner liner 16 (in the present embodiment, the residual tension in the circumferential direction on the tire equatorial plane CL) is set within a range of 1 to 3 N / mm Because of this, the radial growth during traveling is suppressed (because the force in the direction in which the inner liner 16 having the residual tension shrinks inward in the radial direction), and the distortion of the tire radial direction outer portion of the tire 10 is alleviated. Therefore, it is advantageous to the crack which arises from the slot bottom of slot 25 of tread rubber layer 22, or the end of belt 20.
  • the residual tension acting on the inner liner 16 is set in the range of 1 to 3 N / mm, before the vulcanization in which the semi-cured inner liner 16 is attached It is possible to suppress deformation of the green tire 36 (see FIG. 7) having a shape close to that of the product tire, and, as an example, deformation of the tread portion of the green tire 36 in the circumferential direction into a corrugated shape.
  • the residual tension in the circumferential direction near the center of the inner liner 16 largely contributes to deformation of the tread portion of the green tire 36, so residual tension on the tire equatorial plane CL on the back surface side of the tread portion 10B of the pneumatic tire 10 It is preferable to measure
  • the ratio t1 / t2 of the gauge t1 of the joint portion 16A of the inner liner 16 and the gauge t2 of the portion on the opposite side by 180 degrees between the joint portion 16A of the inner liner 16 Is set within the range of 105% to 130%, the occurrence of wrinkles on both sides in the circumferential direction of the joint portion 16A of the green tire 36 is suppressed, and the shortage of the tread gauge in the product is suppressed.
  • the overlap length OL of the joint portion 16A in the circumferential direction is set in the range of 1 to 10% of the circumferential length of the inner liner 16, the joint in the green tire is obtained. It is possible to suppress the occurrence of cracking and uniformity defects of the product.
  • the width direction end of the inner liner 16 is located on the inner side in the tire radial direction (arrow C direction side) with respect to the center 12C of the bead core 12 as in the pneumatic tire 10 of the present embodiment shown in FIG.
  • the widthwise end of the inner liner 16 is brought into close contact with the upper ring 60 and the lower ring 62 of the vulcanization molding machine 38
  • the semi-vulcanized rubber inner liner 16 can effectively suppress the gas leakage (compared to the unvulcanized inner liner), and functions as a substitute for the bladder of a conventional vulcanizing machine.
  • the peeling resistance between the inner liner 16 and the carcass 14 is set to 10 N / mm or more, in the green tire 36 having a shape close to the product before vulcanization, the inner liner 16 and Peeling with the carcass 14 can be suppressed.
  • the inner peripheral surface of the inner liner 16 is not used as compared with a pneumatic tire that is molded by using a bladder, since a bladder that contacts the inner liner 16 at the time of vulcanization molding is not used. Is smooth.
  • Test Example 1 In order to determine an appropriate value of the magnitude of the residual tension acting on the inner liner, the inner liner and a plurality of test tires (tires 1 to 4) having different manufacturing conditions were manufactured and evaluated.
  • the tires 1 to 4 are pneumatic tires having a radial structure shown in FIG. Tire size: 205/65 R16 NKTZ Carcass: 1 ply. The thickness is 1.39 mm. The material of the cord is PET. The diameter of the cord is 0.66 mm (structure: 2 twists). The number of code inputs is 580. Belt: Thickness is 0.86 mm. The material of the cord is steel. The diameter of the cord is 0.66 mm. The number of cords driven is 90, and the angle of inclination of the cord is 68 °. Tread: The gauge is 13.8 mm on average.
  • Tire 1 A pneumatic tire obtained by vulcanizing a green tire manufactured using a rubber sheet for an inner liner having a degree of vulcanization of 0% (unvulcanized) and a thickness of 1.0 mm with a vulcanizing machine that does not use a bladder.
  • the residual tension of the product inner liner is 0.3 N / mm.
  • Tire 2 A pneumatic tire obtained by vulcanizing a green tire manufactured using a rubber sheet for an inner liner having a degree of vulcanization of 90% and a thickness of 1.0 mm using a vulcanizing machine that does not use a bladder.
  • the residual tension of the product inner liner is 1.3 N / mm.
  • Tire 3 A pneumatic tire obtained by vulcanizing a green tire manufactured using a rubber sheet for an inner liner having a degree of vulcanization of 90% and a thickness of 2.0 mm using a vulcanizing machine that does not use a bladder.
  • the residual tension of the product inner liner is 2.6 N / mm.
  • Tire 4 A pneumatic tire obtained by vulcanizing a green tire manufactured using a rubber sheet for an inner liner having a degree of vulcanization of 90% and a thickness of 2.5 mm using a vulcanizing machine that does not use a bladder.
  • the residual tension of the product inner liner is 3.3 N / mm.
  • the residual tension of the inner liner in the tires 1 to 4 is residual tension in the circumferential direction of the tire on the equatorial plane of the tire.
  • the appearance of the manufactured green tire is visually observed to observe the deformation of the green tire, and the vulcanized molded product is cut to obtain the stepped amount of the joint portion of the inner liner (unit: mm, see FIG. 4).
  • the stepped amount of the joint portion of the inner liner (unit: mm, see FIG. 4).
  • the results of the test were as follows. In the tire 1, no deformation was found in the green tire, but in the product tire, the shouldered amount of the joint portion of the inner liner was 1.2 mm, and could not be suppressed to 1.0 mm or less. In the tire 2, no deformation was observed in the green tire. In the product tire, the stepped amount of the joint portion of the inner liner was 1.1 mm. In the tire 3, no deformation was observed in the green tire. In the product tire, the step amount of the joint portion of the inner liner was 0.35 mm and could be suppressed to 1.0 mm or less. When the green tire was removed from the tire forming drum, as a result of the residual tension of the inner liner being too large, the tire 4 was deformed so that the tread was corrugated in the circumferential direction.
  • the residual tension of the inner liner 16 is made larger than 2.3 (N / mm) I know it is necessary.
  • Test Example 2 In addition, in order to obtain an appropriate value of the magnitude of the residual tension acting on the inner liner from the viewpoint different from that of Test Example 1, the inner liner and a plurality of test tires (tires 1 to 5) having different manufacturing conditions are manufactured. And evaluated.
  • Tire 1 A pneumatic tire obtained by vulcanizing a green tire manufactured using a rubber sheet for an inner liner having a degree of vulcanization of 51% and a thickness of 1 mm with a vulcanizing machine that does not use a bladder.
  • the residual tension of the product inner liner is 0.8 N / mm.
  • a green tire is manufactured by changing manufacturing conditions so that the ratio t1 / t2 of the gauge t1 of the joint portion of the inner liner in the product tire and the gauge t2 of the portion on the opposite side to the joint portion of the inner liner changes.
  • the thickness of the joint portion of the unvulcanized rubber sheet of 1.0 mm in thickness which will be the inner liner of the product tire, is made in advance in the drum It is wound around the outer peripheral surface to be formed into a cylindrical shape, and is vulcanized in a vulcanizer at about 145 ° C. for about 30 minutes to obtain a semi-vulcanized inner liner.
  • the relationship between the ratio t1 / t2 of the product tire, the deformation of the green tire, and the tread gauge was examined.
  • the tire 4 in the product state in which the ratio t1 / t2 is set to 135 is insufficient in the tread gauge on the outer side in the tire radial direction of the joint portion.
  • the standard for judging that the tread gauge is insufficient is that the tread gauge at the joint portion is -0.5 mm or more in actual dimension as compared with the tread gauge at other than the joint portion.
  • overlap length is ratio (%) of the length of the joint part measured to the tire circumferential direction on the tire equatorial plane and the tire circumferential direction length of an inner liner.
  • overlap length is ratio (%) of the length of the joint part measured to the tire circumferential direction on the tire equatorial plane and the tire circumferential direction length of an inner liner.
  • the green tire was removed from the tire forming drum, and in the green tire having a shape close to that of the product tire, it was visually examined whether or not there is a circumferentially spaced portion in the joint portion of the inner liner.
  • Uniformity defect Measured under conditions of rim width 8 inches, internal pressure 180 kPa, load 5170 N. In the evaluation, it was judged that the RFV value was defective with a + 10% increase.
  • the circumferential length of the inner liner measured on the equatorial plane of the overlap length (measured in the tire circumferential direction) at the joint portion of the inner liner It can be seen that it may be in the range of 1% to 10% of the height (measured on the inner circumferential surface).
  • Test Example 5 The production conditions were changed to produce a green tire.
  • An unvulcanized rubber sheet to be the inner liner of a product tire is wound around the outer peripheral surface of a drum to form a cylindrical shape, and by changing the time at a constant temperature in a vulcanized can, the degree of vulcanization is changed to half cure.
  • An inner liner of vulcanization (90% vulcanization) and complete vulcanization (100% vulcanization) was obtained. While investigating whether peeling occurred between the inner liner and the carcass in the manufactured green tire, the peeling resistance between the inner liner and the carcass in the product tire obtained by vulcanizing and molding the green tire was investigated. . Peeling resistance: Cut a test piece from the tire side.
  • the semi-vulcanized inner liner 16 when manufacturing the green tire 36, is formed of a rubber sheet of a fixed thickness, but the inner liner 16 is not limited to a fixed thickness, but the thickness is It may be different.
  • the thickness of the portion corresponding to the bead portion 10A of the pneumatic tire 10 may be reduced, and the thickness of the portion corresponding to both sides of the tire equatorial plane corresponding to the tread portion 10B may be increased.
  • the gauge of the bead to the side portion of the pneumatic tire can be thin, and the weight of the tire can be reduced.
  • the modulus of the portion corresponding to both sides of the tire equatorial plane corresponding to the tread portion 10B may be larger than the modulus of the portion corresponding to the bead portion 10A.
  • the gauge of the bead to the side portion of the pneumatic tire can be thinned, and the weight of the tire can be reduced.
  • the inner liner 16 of this embodiment is made of rubber, but the rubber may contain other materials other than rubber, such as thermoplastic synthetic resin, and a synthetic resin film or the like is attached. It is good.
  • the present invention is applicable not only to passenger cars but also to pneumatic tires other than passenger cars.

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

Abstract

L'invention concerne un pneumatique comprenant : une carcasse s'étendant d'une section talon à l'autre section talon et ayant des extrémités en prise avec des tringles ; et un revêtement intérieur qui est fixé à la surface périphérique intérieure de la carcasse, le revêtement intérieur est pourvu d'une partie raccord où les extrémités circonférentielles du revêtement intérieur se chevauchent et est conçu de telle sorte que la tension résiduelle agissant dans le revêtement intérieur se trouve dans la plage allant de 1 à 3 N/mm.
PCT/JP2018/027381 2017-12-13 2018-07-20 Pneumatique WO2019116627A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019558893A JP7063917B2 (ja) 2017-12-13 2018-07-20 空気入りタイヤ

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JP2017-238586 2017-12-13
JP2017238586 2017-12-13

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WO2019116627A1 true WO2019116627A1 (fr) 2019-06-20

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53105578A (en) * 1977-02-25 1978-09-13 Yokohama Rubber Co Ltd Method for making pneumatic tire
JPS61118205A (ja) * 1984-11-15 1986-06-05 Bridgestone Corp 隣接ゴム部材間のゴム流れ防止方法
US6964719B1 (en) * 1999-10-18 2005-11-15 The Goodyear Tire & Rubber Company Process for manufacturing tires
JP2008024215A (ja) * 2006-07-24 2008-02-07 Bridgestone Corp 空気入りタイヤ用インナーライナー及びそれを備えた空気入りタイヤ
JP2008126727A (ja) * 2006-11-17 2008-06-05 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2011074142A (ja) * 2009-09-29 2011-04-14 Bridgestone Corp ゴム組成物およびその製造方法、インナーライナー、並びに空気入りタイヤ
US20110146869A1 (en) * 2009-12-18 2011-06-23 Ramendra Nath Majumdar Pneumatic tire having a built-in seamless polyurethane sealant layer and preparation thereof
JP2014507319A (ja) * 2010-12-30 2014-03-27 コーロン インダストリーズ インク タイヤインナーライナー用フィルムおよびその製造方法
US20170313132A1 (en) * 2014-12-19 2017-11-02 Exxonmobil Chemical Patents Inc. Expansible Barrier Film Assemblies

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53105578A (en) * 1977-02-25 1978-09-13 Yokohama Rubber Co Ltd Method for making pneumatic tire
JPS61118205A (ja) * 1984-11-15 1986-06-05 Bridgestone Corp 隣接ゴム部材間のゴム流れ防止方法
US6964719B1 (en) * 1999-10-18 2005-11-15 The Goodyear Tire & Rubber Company Process for manufacturing tires
JP2008024215A (ja) * 2006-07-24 2008-02-07 Bridgestone Corp 空気入りタイヤ用インナーライナー及びそれを備えた空気入りタイヤ
JP2008126727A (ja) * 2006-11-17 2008-06-05 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2011074142A (ja) * 2009-09-29 2011-04-14 Bridgestone Corp ゴム組成物およびその製造方法、インナーライナー、並びに空気入りタイヤ
US20110146869A1 (en) * 2009-12-18 2011-06-23 Ramendra Nath Majumdar Pneumatic tire having a built-in seamless polyurethane sealant layer and preparation thereof
JP2014507319A (ja) * 2010-12-30 2014-03-27 コーロン インダストリーズ インク タイヤインナーライナー用フィルムおよびその製造方法
US20170313132A1 (en) * 2014-12-19 2017-11-02 Exxonmobil Chemical Patents Inc. Expansible Barrier Film Assemblies

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JPWO2019116627A1 (ja) 2020-12-03

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