-
公开(公告)号：JPH11301223A
公开(公告)日：1999-11-02
申请号：JP11548098
申请日：1998-04-24
Applicant: BRIDGESTONE CORP
Inventor： USUI SHUNICHI
Abstract: PROBLEM TO BE SOLVED: To realize good run-flat traveling by using a specific steel cord for a carcass ply and keeping a tensile stress of a covered rubber of the carcass ply within a specific range and to also improve comfortability to ride and a rolling resistance during usual internal pressure traveling. SOLUTION: A rupture elongation of a buried steel cord of at least one carcass plies is 3.5% or more, preferably 4.0% or more. When the elongation is less than 3.5%, the steel cord itself is not preferable at the point of a fatigue durability. Further, a tensile stress at a 50% elongation of a rubber component used for a carcass ply is 0.5 to 3.0 MPa, preferably 1.5 to 2.0 MPa. When the tensile stress is lower than 0.5 MPa, a durability of a neighborhood to a belt edge is deteriorated during usual internal pressure traveling and a damage such as a separation of the belt 4 and the carcass 2, etc., is caused. When the tensile stress is higher than 3.0 MPa, comfortability to ride cannot be improved.
-
公开(公告)号：JPH0732823A
公开(公告)日：1995-02-03
申请号：JP17571193
申请日：1993-07-15
Applicant: BRIDGESTONE CORP
Inventor： USUI SHUNICHI
IPC: B29D30/06 , B29K9/00 , B60C13/00 , B60C17/00 , C08K3/00 , C08K3/04 , C08K3/06 , C08K5/04 , C08K5/09 , C08L21/00
Abstract: PURPOSE:To decrease the self-heat-generation property and elevate the blowout temperature limit, by enhancing the productivity with the dehydrated castor oil fatty acid acting as a softening agent during manufacture and without need to use any other softening agent such as, for example, aromatic oil or the like and by, after curing, permitting the fatty acid be crosslinked with sulfur to thereby increase the elastic modulus. CONSTITUTION:In a pneumatic tire comprising a pair of annular elastic reinforcing bodies provided on both side portions of the interior of the pneumatic tire or in the regions of from the side portions to the shoulder portions, the reinforcing body consists of a rubber composition that contains 0.5 to 10 weight part of the dehydrated caster oil fatty acid based on 100 weight part of rubber, to provide a safety tire.
-
公开(公告)号：JP2002067037A
公开(公告)日：2002-03-05
申请号：JP2000260604
申请日：2000-08-30
Applicant: BRIDGESTONE CORP
Inventor： WADA ICHIRO , USUI SHUNICHI , YOSHII HIROSHI
Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a tire by a bladderless vulcanization for removing a limit due to a tire size as much as possible by preventing decreases in physical properties of a tire constituting material when a heating medium is directly acted at an inner peripheral surface of the tire in the bladderless vulcanization. SOLUTION: The method for manufacturing the tire comprises the steps of scattering or coating an emulsion containing a polymer as a dispersoid on the inner peripheral surface of a green tire, then drying it to form a protective film, and then conducting the bladderless vulcanization.
-
Patent Agency Ranking
公开(公告)号：JP2000025409A
公开(公告)日：2000-01-25
申请号：JP19753698
申请日：1998-07-13
Applicant: BRIDGESTONE CORP
Inventor： USUI SHUNICHI
Abstract: PROBLEM TO BE SOLVED: To improve a lightweight property, low rolling resistance and durability in an actual travel and an aging effect by including a specific quantity of a specific vulcanization accelerator in at least one kind of case rubber to form an inner liner arranged in direct contact with the inner side face of a carcass layer. SOLUTION: This pneumatic tire is provided with a carcass layer extending astride a pair of bead sections and a tread section located on the crown section of the carcass layer, and an inner liner layer is formed on the inner side face of the carcass layer. The inner liner has the gauge of 0.1-0.6 mm, and it contains a vulcanization accelerator expressed by the formula I or II in one kind of case rubber selected from coating rubber for a carcass ply, coating rubber for a belt play and a bead filler at the ratio of 0.5-5.0 pts.wt. against the raw material rubber 100 pts.wt., where R1, R2 indicate each hydrogen atom, alkyl group or aryl group.
-
公开(公告)号：JPH11301224A
公开(公告)日：1999-11-02
申请号：JP11549798
申请日：1998-04-24
Applicant: BRIDGESTONE CORP
Inventor： USUI SHUNICHI
Abstract: PROBLEM TO BE SOLVED: To realize good run-flat traveling without injuring comfortability to ride during usual internal pressure traveling by passing at least one carcass plies through between a pair of bead cores and terminating at a neighborhood of the bead cores. SOLUTION: A carcass ply 2 passes through between a pair of bead cores 8a, 8b and is terminated to a neighborhood of the bead cores in a bead portion 8 comprising a pair of upper and lower bead cores 8a, 8b against a tire-radial direction. Preferably, the carcass ply 2 passes through between a pair of bead cores 8a, 8b and is bent down in the bead portion 8 comprising a pair of upper and lower bead cores 8a, 8b against the tire-radial direction, or the carcass ply 2 passes through a tire-axial outside of a rubber reinforcing layer and an axial inside of a bead filler 9 and an edge of the carcass ply 2 is not positioned at an axial outside of the bead filler 9. Thereby, it is prevented that an extreme compressive strain is added to a carcass ply bent portion of the bead portion during run-flat traveling.
-
公开(公告)号：JPH11301222A
公开(公告)日：1999-11-02
申请号：JP11547998
申请日：1998-04-24
Applicant: BRIDGESTONE CORP
Inventor： USUI SHUNICHI
Abstract: PROBLEM TO BE SOLVED: To realize good run-flat traveling by using a specific steel cord for a carcass ply and disposing a specific rubber layer between the carcass ply and a belt portion and to improve comfortability to ride during usual internal pressure traveling. SOLUTION: A rupture elongation of a buried steel cord of at least one carcass plies 2 is 3.5% or more. When the elongation is less than 3.5%, the steel cord itself is not preferable in the point of a fatigue durability. Further, a tensile stress at a 100% elongation of a rubber layer 8 disposed between a carcass portion 2 and a belt portion 4 is 0.5 to 3.5 MPa, preferably 1.2 to 3.0 MPa. When the tensile stress is lower than 0.5 MPa, an elastic constant of a carcass ply covering rubber with a belt ply covering rubber becomes bigger and a damage such as a separation of the belt portion 4 and the carcass portion 2, etc., is caused during usual traveling. When the tensile stress is bigger than 3.5 MPa, comfortability to ride cannot be improved.
-
公开(公告)号：JP2007326942A
公开(公告)日：2007-12-20
申请号：JP2006158555
申请日：2006-06-07
Applicant: Bridgestone Corp , 株式会社ブリヂストン
Inventor： USUI SHUNICHI
Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic tire improving wet grip performances, brake performances on ice and snow and dry grip performances at the same time. SOLUTION: The pneumatic tire is obtained by using a rubber composition comprising a rubber component (A) containing 5-50 mass% of (A-1) a modified conjugated diene-based polymer A and 4-45 mass% of (A-2) a styrene-butadiene copolymer rubber. (A-1) The modified conjugated diene-based polymer A is obtained by modifying active terminals of a conjugated diene-based polymer having ≥75 mol% content of cis-1,4-bonds with at least a hydrocarbyloxysilane compound. (A-2) The styrene-butadiene copolymer rubber has 20,000-150,000 weight-average molecular weight. COPYRIGHT: (C)2008,JPO&INPIT
Abstract translation: 要解决的问题：提供一种提高湿抓地性能，同时在冰雪上制动性能和干抓地性能的充气轮胎。 解决方案：通过使用包含含有5-50质量％（A-1）改性共轭二烯系聚合物A的橡胶成分（A）的橡胶组合物和4-45质量％的（ A-2）苯乙烯 - 丁二烯共聚物橡胶。 （A-1）改性共轭二烯系聚合物A是通过用至少一种烃氧基硅烷化合物改性具有≥75摩尔％的顺式-1,4-键的共轭二烯系聚合物的活性末端而得到的。 （A-2）苯乙烯 - 丁二烯共聚物橡胶的重均分子量为20,000〜150,000。 版权所有（C）2008，JPO＆INPIT
-
公开(公告)号：JP2001039115A
公开(公告)日：2001-02-13
申请号：JP21437899
申请日：1999-07-28
Applicant: BRIDGESTONE CORP
Inventor： TAKAHASHI ICHIRO , DOBASHI KENSUKE , USUI SHUNICHI
Abstract: PROBLEM TO BE SOLVED: To prevent degradation of the draining property associated with reduction in volume in a tread groove in the middle to ending period of the traveling so that the wet performance such as the hydroplaning resistance is excellent until the middle to ending period of the traveling. SOLUTION: This tire has a tread pattern including a plurality of groove parts with a tread 1 extending in the circumferential direction, and a plurality of ribs 3 divided by these groove parts 2a. A rubber B peelable from a tread rubber A is arranged in the circumferential direction inside the tread rubber A to constitute at least one row of ribs 3 and on a belt or a breaker 4 so that the rubber B is exposed on a tread part of the rid in and after the middle period of the wear of the tread rubber A.
-
-
-
-
-
-
-
Search Results
8
records
(took 0.024 seconds)
