WO2005009763A1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
- Publication number
- WO2005009763A1 WO2005009763A1 PCT/JP2004/010612 JP2004010612W WO2005009763A1 WO 2005009763 A1 WO2005009763 A1 WO 2005009763A1 JP 2004010612 W JP2004010612 W JP 2004010612W WO 2005009763 A1 WO2005009763 A1 WO 2005009763A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- rubber layer
- cover rubber
- sealant
- hardness
- Prior art date
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
- B29C73/18—Auto-repairing or self-sealing arrangements or agents the article material itself being self-sealing, e.g. by compression
- B29C73/20—Auto-repairing or self-sealing arrangements or agents the article material itself being self-sealing, e.g. by compression the article material only consisting in part of a deformable sealing material
-
- 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
- Y10T152/10666—Automatic sealing of punctures [e.g., self-healing, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
- Y10T152/10666—Automatic sealing of punctures [e.g., self-healing, etc.]
- Y10T152/10675—Using flowable coating or composition
- Y10T152/10684—On inner surface of tubeless tire
Definitions
- the present invention relates to a pneumatic tire having a puncture prevention function, and more particularly, to a pneumatic tire with improved puncture sealability.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-247122
- An object of the present invention is to provide a pneumatic tire that can more reliably seal a puncture hole.
- the pneumatic tire of the present invention that achieves the above object is a pneumatic tire in which a sealant layer for preventing puncture is provided on the inner surface of the tread portion and the surface of the sealant layer is covered with a cover rubber layer.
- the cover rubber layer is made of rubber having a JIS A hardness X of 50 70, and the thickness Y (mm) of the cover rubber layer satisfies the following formula in relation to the hardness X. It is characterized by.
- the sealant near the puncture hole enters and closes the puncture hole without the cover rubber layer entering the puncture hole. It is possible to improve the sealing effect of the puncture hole in the above. Therefore, the puncture hole can be more reliably sealed.
- FIG. 1 is a cross-sectional view of a principal part showing one embodiment of a pneumatic tire of the present invention.
- FIG. 2 is an explanatory view showing a state in which a nail is pierced in a tire having a sealant layer and a cover rubber layer in a cross section.
- FIG. 3 is an explanatory view showing a state in which a nail is removed from the tire shown in FIG. 2 in a cross section.
- FIG. 3 ⁇ is another explanatory view showing a state where a nail is removed from the tire shown in FIG. 2 in cross section.
- FIG. 4 is a graph showing the relationship between JIS ⁇ hardness X and thickness ⁇ of the rubber of the cover rubber layer in the pneumatic tire of the present invention.
- FIG. 5 is still another explanatory view showing a state where a nail is removed from the tire shown in FIG. 2 in a cross section.
- 1 indicates a tread portion
- 2 indicates a sidewall portion
- 3 indicates a bead portion
- a carcass layer 4 is mounted between the left and right bead portions 3, and both ends 4 a are folded back from the inside of the tire to the outside so as to sandwich a bead filler 10 around a bead core 5 embedded in the bead portion 3.
- a plurality of belt layers 6 are arranged on the outer peripheral side of the carcass layer 4 of the tread portion 1. Inside the carcass layer 4, an inner liner layer 7 is provided.
- a sealant layer 8 for preventing puncture is provided on the inner peripheral side of the inner liner layer 7 of the tread portion 1.
- the sealant layer 8 annularly disposed on the tire inner surface IX of the tread portion 1 is made of a conventionally known sealing material, for example, butadiene, isoprene, styrene, a styrene rubber polymer such as butadiene, and a copolymer of polyethylene and styrene.
- Preferable examples include a olefin-based rubber polymer such as a polymer and a gel-like composition in which paraffin-based oil is dispersed in these as required.
- a cover rubber layer 9 is annularly disposed on the inner peripheral side of the sealant layer 8.
- the cover rubber layer 9 covers the surface 8a of the sealant layer 8, and both end portions 9a in the tire width direction are joined to the inner liner layer 7. With this cover rubber layer 9, when a nail or the like is pierced and punctured, the sealant around the pierced nail is brought closer to the bow I to exhibit a high sealing effect. Further, the sealant layer 8 having adhesiveness is not exposed on the tire surface, so that the tire can be easily handled.
- the cover rubber layer 9 is made of rubber having a JIS A hardness X of 50-70, and the thickness Y (mm) of the cover rubber layer 9 satisfies the following expression in relation to the hardness X. I have.
- the present inventors have conducted intensive studies to improve the puncture sealability of a tire in which the sealant layer is covered with a cover rubber layer, and as a result of repeated experiments, have found the following. In other words, it was found that the sealant of the sealant layer seals the puncture hole when nails and the like, which are the cause of the puncture, are removed, but at this time, the cover rubber layer has a great influence.
- the present inventors paid attention to the hardness and thickness of rubber, which are factors that determine the rigidity of the cover rubber layer C.
- the JIS A hardness X of the rubber Assuming that Y is the vertical axis, when the relationship between the two is within the area ⁇ ⁇ surrounded by the following four straight lines, it can be seen that a good sealing effect can be exhibited even after removing puncture factors such as nails. .
- the sealant layer S is reinforced by the cover rubber layer C whose hardness and thickness are defined in the range ⁇
- the sealant near the puncture hole is covered with the cover rubber layer C.
- the sealant of the sealant layer S near the puncture hole 12 closes the puncture hole 12 after removing the nails, etc. It exhibits a great sealing effect.
- the cover rubber layer 9 has a rubber force of JIS A hardness X of 50 to 70, and the thickness Y (mm) is related to the hardness X as described above. It was stipulated.
- the hardness X is lower than 50, and if the thickness Y is within the range of S ⁇ 0.025X + 2.25, the rigidity of the cover rubber layer 9 becomes too low, and the phenomenon shown in FIG. It is easy to occur. Conversely, if the hardness X is higher than 70, and if the thickness Y is within the range of S ⁇ 0.025X + 3.05, the rigidity of the cover rubber layer 9 becomes too high, and the phenomenon shown in FIG. 3B is likely to occur. Become.
- the following formula is satisfied in relation to the JIS A hardness X of the rubber of the cover rubber layer 9 is 5568 and the thickness Y is the hardness X.
- the rubber composition constituting the cover rubber layer 9 the same as the conventional rubber composition can be used, and the rubber composition is not particularly limited.
- natural rubber styrene-butadiene rubber can be used.
- Butadiene rubber and the like can be preferably used.
- the elongation at break of the rubber of the cover rubber layer 9 in the rubber tensile test should be 700% or more when the tread portion 1 is attached and foreign matter such as a tear nail 11 enters the tire.
- the cover rubber layer 9 is preferably extended because the effect of easily gathering the sealant layer 8 adhered to the outer peripheral surface (the surface on the sealant side) of the sealant layer 8 near the damaged part by the foreign matter is preferable.
- cover The upper limit of the breaking elongation of the rubber of the rubber layer 9 is not particularly limited, the higher it is.
- the cover rubber layer 9 has a glass transition point of ⁇ 50.
- the force of the rubber composed of C or less is preferable in that the function as the cover rubber layer 9 is effectively exhibited.
- the present invention having the above-described excellent effects can be used very effectively as a pneumatic tire having a puncture prevention function.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112004001372T DE112004001372T5 (de) | 2003-07-28 | 2004-07-26 | Luftreifen |
US10/561,950 US20060174991A1 (en) | 2003-07-28 | 2004-07-26 | Pneumatic tire |
JP2005512046A JPWO2005009763A1 (ja) | 2003-07-28 | 2004-07-26 | 空気入りタイヤ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-202407 | 2003-07-28 | ||
JP2003202407 | 2003-07-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005009763A1 true WO2005009763A1 (ja) | 2005-02-03 |
Family
ID=34100575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/010612 WO2005009763A1 (ja) | 2003-07-28 | 2004-07-26 | 空気入りタイヤ |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060174991A1 (ja) |
JP (1) | JPWO2005009763A1 (ja) |
CN (1) | CN1829615A (ja) |
DE (1) | DE112004001372T5 (ja) |
WO (1) | WO2005009763A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008123175A1 (ja) * | 2007-04-02 | 2008-10-16 | The Yokohama Rubber Co., Ltd. | 空気入りタイヤ |
JP2018187994A (ja) * | 2017-05-01 | 2018-11-29 | 住友ゴム工業株式会社 | タイヤ・リム組立体 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006038806B4 (de) * | 2006-08-18 | 2015-06-25 | Continental Reifen Deutschland Gmbh | Verfahren zur Herstellung eines selbstdichtenden Fahrzeugluftreifens |
JP4770713B2 (ja) * | 2006-11-17 | 2011-09-14 | 横浜ゴム株式会社 | 空気入りタイヤ |
EP1985436A1 (de) * | 2007-04-27 | 2008-10-29 | Continental Aktiengesellschaft | Luftreifen mit Dichtmittelzwischenlage und Verfahren zu seiner Herstellung |
DE102012108343A1 (de) * | 2012-09-07 | 2014-03-13 | Continental Reifen Deutschland Gmbh | Fahrzeugluftreifen |
US10399391B2 (en) * | 2014-12-16 | 2019-09-03 | Triangle Tyre Co., Ltd. | Pneumatic tire having multiple built-in sealant layers and preparation thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000034366A (ja) * | 1998-07-17 | 2000-02-02 | Sumitomo Rubber Ind Ltd | インナーライナー用ゴム組成物 |
JP2000318406A (ja) * | 1999-05-10 | 2000-11-21 | Honda Motor Co Ltd | シール剤入りタイヤ |
JP2002293990A (ja) * | 2001-03-28 | 2002-10-09 | Yokohama Rubber Co Ltd:The | タイヤ用ゴム組成物 |
JP2003039913A (ja) * | 2001-08-01 | 2003-02-13 | Ohtsu Tire & Rubber Co Ltd :The | インナーライナーを備えた空気入りタイヤ |
WO2003026906A1 (fr) * | 2001-09-14 | 2003-04-03 | The Yokohama Rubber Co., Ltd. | Pneumatique, procede de fabrication associe et composition de caoutchouc destinee a un materiau de scellement |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1491197A (en) * | 1973-11-07 | 1977-11-09 | Dunlop Ltd | Pneumatic tyres |
JP2664062B2 (ja) * | 1988-05-18 | 1997-10-15 | 住友ゴム工業 株式会社 | 重車両用ラジアルタイヤ |
US5005625A (en) * | 1989-04-24 | 1991-04-09 | The Goodyear Tire & Rubber Company | Pneumatic tire having air retention innerliner |
-
2004
- 2004-07-26 CN CNA2004800215525A patent/CN1829615A/zh active Pending
- 2004-07-26 DE DE112004001372T patent/DE112004001372T5/de not_active Withdrawn
- 2004-07-26 US US10/561,950 patent/US20060174991A1/en not_active Abandoned
- 2004-07-26 JP JP2005512046A patent/JPWO2005009763A1/ja not_active Withdrawn
- 2004-07-26 WO PCT/JP2004/010612 patent/WO2005009763A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000034366A (ja) * | 1998-07-17 | 2000-02-02 | Sumitomo Rubber Ind Ltd | インナーライナー用ゴム組成物 |
JP2000318406A (ja) * | 1999-05-10 | 2000-11-21 | Honda Motor Co Ltd | シール剤入りタイヤ |
JP2002293990A (ja) * | 2001-03-28 | 2002-10-09 | Yokohama Rubber Co Ltd:The | タイヤ用ゴム組成物 |
JP2003039913A (ja) * | 2001-08-01 | 2003-02-13 | Ohtsu Tire & Rubber Co Ltd :The | インナーライナーを備えた空気入りタイヤ |
WO2003026906A1 (fr) * | 2001-09-14 | 2003-04-03 | The Yokohama Rubber Co., Ltd. | Pneumatique, procede de fabrication associe et composition de caoutchouc destinee a un materiau de scellement |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008123175A1 (ja) * | 2007-04-02 | 2008-10-16 | The Yokohama Rubber Co., Ltd. | 空気入りタイヤ |
JP2018187994A (ja) * | 2017-05-01 | 2018-11-29 | 住友ゴム工業株式会社 | タイヤ・リム組立体 |
Also Published As
Publication number | Publication date |
---|---|
US20060174991A1 (en) | 2006-08-10 |
JPWO2005009763A1 (ja) | 2006-09-07 |
DE112004001372T5 (de) | 2006-07-20 |
CN1829615A (zh) | 2006-09-06 |
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