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公开(公告)号：JPH0999713A
公开(公告)日：1997-04-15
申请号：JP25879495
申请日：1995-10-05
Applicant: BRIDGESTONE CORP
Inventor： MATSUMOTO HIROYUKI , WADA ICHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic radial tire which has excellent drainage performance without being influenced, by a groove shape and groove arrangement and can predominantly exhibit both performance such as dry maneuvering stability and uneven abrasion resistance and hydroplaning resistance. SOLUTION: At least a surface layer part 7c on the tread side containing a groove surface of tread rubber having a groove in a tread part 3, is composed of a rubber composition having particulates of a fluororesin as a blending component.
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公开(公告)号：JPH01156102A
公开(公告)日：1989-06-19
申请号：JP31423887
申请日：1987-12-14
Applicant: BRIDGESTONE CORP
Inventor： IMAI ISAMU , INADA NORIO , WADA ICHIRO
Abstract: PURPOSE:To improve safety, making use of characteristics such as light weight, high strength and so on by forming a cord of carcass ply by fiber composed of a specified aromatic polyamide mixture and specifying the folding height of a bead portion of the carcass ply. CONSTITUTION:An organic fiber cord in a carcass ply arranged at a specified angle in the circumferential direction of a tire is formed by fiber composed of aromatic polyamide mixture. The aromatic polyamide mixture is let have the second polyamide and diaminobenzanilide unit at specified proportions. The fiber is set in such a manner that as raw yarn properties of matter, the strength is 18g/d or more, the cutting elongation is 4.0% or more, and the elongation when stress of 4.5g/d is applied is 1.2% or more. Further, the relation between the vertical height Hp(mm) above t//he intersection P of the bead base and the rim side to the turn-up end portion outward in the radial direction of a tire and the vertical height Hr(mm) above the intersection P to the rim end is set in such a manner as to satisfy the expression: Hp>=Hr+10(mm).
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公开(公告)号：JPS6366382A
公开(公告)日：1988-03-25
申请号：JP20909986
申请日：1986-09-05
Applicant: BRIDGESTONE CORP
Inventor： TOKI SHIGEYUKI , SATO MASANORI , WADA ICHIRO
IPC: B29D30/40 , C08J5/06 , D06M15/693
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24.发明专利
公开(公告)号：JPS6259103A
公开(公告)日：1987-03-14
申请号：JP19609585
申请日：1985-09-06
Applicant: BRIDGESTONE CORP
Inventor： OSHIMA KAZUO , AKIYAMA TSUNEJI , WADA ICHIRO , IKEHARA KIYOSHI
Abstract: PURPOSE:To improve safety, steering stability, and low fuel consumption performance by specifying the number of setting per prescribed width by using the ply cord made of highly stregthened aliphatic polyamide fibers. CONSTITUTION:The cord of a carcass ply with the bias cord arrangement in crossing at an angle of 30-45 deg. for the circumferential direction of a tire is formed by twisting aliphatic polyamide raw yarn filaments. When the twisting factor of the carcass ply cord is set NT, the strength of the carcass ply cord taken from the tire is set S(g/d), the modulus in 100% elongation of the coating rubber of the carcass ply cord is E(kg/cm ), the following relations shall be satisfied: 0.40 =9.1, E>22. Further, when the number of setting per 5cm in the tire center part of the carcass ply cord is set (y), the following relations shall be satisfied: y>=-0.1156S +29.283, y>=-0.191E+25.2.
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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.
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Patent Agency Ranking
公开(公告)号：JP2000301908A
公开(公告)日：2000-10-31
申请号：JP11186699
申请日：1999-04-20
Applicant: BRIDGESTONE CORP , TOKAI RYOKAKU TETSUDO KK
Inventor： AOYAMA MASANORI , WADA ICHIRO , ITAI SEIJI , OSHIMA HIROSHI , ADACHI MASAHITO
Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic tire for a heavy load vehicle suitable for a vehicle of a magnetic levitation type and capable of restraining early stage abrasion of a tread rubber without generating adhesion-peeling-off trouble and rubber breakage trouble between the tread rubber and a belt. SOLUTION: A rubber provided by vulcanizing a rubber composition containing 40-55 wt.pt. of carbon black, and 2.5-4.0 wt.pt. of mixture comprising sulfur and an organic thiosulfate compound expressed by the formula MO3S- S-(CH2)n-S-SO3M, per 100 wt.pt. of a diene-based rubber, preferably containing butadiene rubber with 95% or more of cis-isomer content, is arranged in a portion contacting with a road face of a tread part in a pneumatic tire. In the formula, (n) represents 3-10, and M represents one equivalent of lithium, potassium, sodium and the like.
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公开(公告)号：JPH09136997A
公开(公告)日：1997-05-27
申请号：JP29698295
申请日：1995-11-15
Applicant: BRIDGESTONE CORP
Inventor： WADA ICHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a radial tire excellent in control stability and wear resistance. SOLUTION: This radial tire is provided with a tread section having a plurality of blocks and ribs formed by dividing the tread surface by at least two circumferential main grooves of the tire. The radial tire is such that its tread section comprises a rubber composition comprising 100 pts.wt. rubber component containing at least 40 pts.wt. SBR having a styrene content of 20-60%, 60-120 pts.wt. carbon black having an SA (specific surface for nitrogen adsorption) of 80-280m /g of N2 , and 5-40 pts.wt. rosin from natural resin, the rubber composition having a 25 deg.C JIS hardness in excess of 65 deg.. The rubber composition is arranged in a central rubber layer 20 of the tread section 14, and its hardness is higher than that of rubber layers 22, 24 in the tread side edges.
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公开(公告)号：JPH0356544A
公开(公告)日：1991-03-12
申请号：JP19064189
申请日：1989-07-25
Applicant: BRIDGESTONE CORP
Inventor： WADA ICHIRO , YANAMI JIYOUJI , SAITO TADASHI
IPC: B60C1/00 , C08K5/34 , C08K5/3415 , C08K5/36 , C08K5/40 , C08K5/45 , C08K5/47 , C08L7/00 , C08L9/06 , C08L21/00 , C08L91/00
Abstract: PURPOSE:To obtain a composition having extremely improved heat resistance steeply accelerating crosslinking by mixing bismaleimide derivative and specific vulcanization accelerator into rubber component containing SBR or NR, etc. CONSTITUTION:(A) 100 pts.wt. rubber component composed of single styrenebutadiene copolymer rubber (SBR) or a mixture of said rubber with natural rubber and BR in an amount of SBR/(NR+BR)=70/30 is mixed with (B) 70-170 pts. wt. carbon black, (C) 50-270 pts.wt. aromatic oil, (D) 0.2-5 pts.wt. bismaleimide derivative crosslinking agent, (E) 0.3-2 pts. wt. N-cyclohexy1-2- benzothiazolyl sulfenamide and (F) 0.1-1.5 pts.wt. tetramethylthiuram disulfide and/or dibenzothiazyl disulfide, preferably in a ratio of the component E/the component D as 0.3-1 to afford the aimed composition.
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公开(公告)号：JPH0331339A
公开(公告)日：1991-02-12
申请号：JP16527689
申请日：1989-06-29
Applicant: BRIDGESTONE CORP
Inventor： SAITO TADASHI , YANAMI JIYOUJI , WADA ICHIRO , TAKIZAWA TOSHIKI
IPC: B60C1/00 , C08C19/02 , C08C19/12 , C08F8/20 , C08K3/04 , C08K5/17 , C08L9/00 , C08L15/02 , C08L21/00 , C08L91/00
Abstract: PURPOSE:To provide the subject composition having excellent heat resistance, wear resistance and high temperature breakage strength even when carbon black is compounded in a large amount, by combining a halogen-modified styrene-butadiene copolymer with a diamine. CONSTITUTION:(A) 100 pts. of raw material rubber comprising (i) 60-100 pts.wt. of a p-halomethylbenzoyl group of the formula (X is halogen atom) and (ii) 40-0 pts.wt. of any other conjugated diene polymer is compounded wit(B) 70-190 pts. of carbon black, (C) 50-285 pts. of a process oil and (D) 0.3-10 pts. of a diamine of formula: H2N-R-NH2 (R is
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公开(公告)号：JP2002088191A
公开(公告)日：2002-03-27
申请号：JP2000054877
申请日：2000-02-29
Applicant: BRIDGESTONE CORP
Inventor： WADA ICHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a rubber composition for inner liners of tires especially suitable for heavy-duty vehicles used at very low temperatures such as aircraft, trucks and buses, excellent in uncured rubber modules, workability, etc., causing no cracks and having low air permeability even at very low temperature, capable of thin gauge design while keeping tire pressure retainability to afford lightweight tires. SOLUTION: This rubber composition for inner liners is characterized by comprising a rubber component composed of 0-40 pt(s).wt. of a butyl-based rubber containing >=40 wt.% of a halogenated butyl rubber and 60-100 pts.wt. of a diene-based rubber and a platy mineral; wherein preferably embodiments include the following: the aspect ratio for the platy mineral is >=5 but
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