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公开(公告)号：JPS62163806A
公开(公告)日：1987-07-20
申请号：JP357286
申请日：1986-01-13
Applicant: BRIDGESTONE CORP
Inventor： IMAI ISAMU , YOTSUMOTO TOSHIHIRO , INADA NORIO
Abstract: PURPOSE:To improve durability, by providing carcass card layers and belt cord layers, having specific construction respectively, and using a cord combined material, in which an impregnation agent enveloping a filament of specific fiber is changed into resin while a tire is in vulcanization, as a strand cord in each of these layers. CONSTITUTION:A tire has one or more pairs of right and left bead wires, and the tire provides carcass cord layers 12, which are fixed turning back around the periphery of each bead wire and having an angle of 75-90 deg. with respect to a peripheral direction of the tire, while belt cord layers 11 having an angle of 0-30 deg. with respect to the peripheral direction of the tire. And a cord combined material, which envelops each filament of aromatic polyamide and total aromatic polyester fiber or polyvinyl alcohol fiber of strength 15g/d or more in an impregnation agent, mainly composed of rubber components, forming a matrix further holding the impregnation agent in a soft quantity before vulcanization of the tire to be changed into resin during the vulcanization, is used as a strand cord for each of the above cord layers 11, 12.
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公开(公告)号：JPS62116302A
公开(公告)日：1987-05-27
申请号：JP25679985
申请日：1985-11-18
Applicant: Bridgestone Corp
Inventor： IMAI ISAMU , INADA NORIO , YAMADA SHIGEKI , KATO KENSHIRO
Abstract: PURPOSE: To aim at lightweightiness as well as to heighten a cord fatigue level and improve durability, by forming each cord available for belt cord ply and a carcass cord ply composed of plural layers each with the specified aromatic polyamide fiber.
CONSTITUTION: This heavy-duty vehicle pneumatic tire is provided with a belt cored ply (belt) 1 consisting of plural layers disposing one continuous cord parallelly in the circumferential direction and a carcass cord ply (carcass) 2 consisting of plural cord layers disposed at a cord angle of 90W75° to the cord of the said ply 1. And, each cord used for the belt 1 and the carcass 2 is formed by an aromatic polyamide fiber composed of a copolymer between poly paraphenylenterephthalamide and poly 3,4'-diphenyletherterephthalamide. With this constitution, this tire is lightweight and its cord fatigue level is improvable, so that the promotion of radial-ply tire for heavy-duty vehicles of a superhigh speed electric car or the like.
COPYRIGHT: (C)1987,JPO&JapioAbstract translation: 目的：通过形成每条具有特定芳香族聚酰胺纤维的多层皮带帘布层和每个由多层构成的胎体帘布层帘线，可以实现轻量化，提高帘线疲劳度，提高耐久性。 构成：该重型车辆用充气轮胎具有由多个在圆周方向平行设置一个连续帘线的多个层组成的带芯层（带）1和由多个帘线层组成的胎体帘布层（胎体）2， 线角度为90-75度 并且，用于带1和胎体2的每个帘线由由聚对苯二甲酰对苯二胺和聚3,4'-二苯基醚对苯二甲酰胺之间的共聚物组成的芳族聚酰胺纤维形成。 通过这种结构，该轮胎重量轻，其疲劳强度提高，能够促进超高速电动汽车等的重型车辆的径向帘布层轮胎。
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公开(公告)号：JPS6285702A
公开(公告)日：1987-04-20
申请号：JP22597585
申请日：1985-10-12
Applicant: BRIDGESTONE CORP
Inventor： YOTSUMOTO TOSHIHIRO , IMAI ISAMU
IPC: D01F6/80 , B60C9/00 , B60C9/02 , B60C9/08 , B60C9/18 , B60C9/20 , B60C9/26 , D02G3/02 , D02G3/48
Abstract: PURPOSE:To improve properties against fatigue, thermal deterioration due to humidity, hygroscopicity and the like by using a steel cord belt layer and an aromatic polyamide fiber cord steel belt layer of specific molecular structure, both as a strengthening belt member for treaded part. CONSTITUTION:The subject radial tread tyre is constituted by an aromatic polyamide fiber cord belt layer 1 and a steel cord belt layer 2 for strengthening treaded part. The aromatic polyamide fiber cord belt layer 1 comprises fiber filaments of aromatic polyamide available from condensation copolymerization of constituents expressed by a general expression I. And said respective fiber filaments has tensile strength of 10g/d or more and initial modulus of 300g/d or more at room temperature, and the belt layer 1 as desired is obtained by twisting said filaments so that the twist coefficient thereof by a predetermined formula will be within 0.2-0.5.
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公开(公告)号：JPS6189106A
公开(公告)日：1986-05-07
申请号：JP21033684
申请日：1984-10-09
Applicant: Bridgestone Corp
Inventor： IMAI ISAMU , INADA NORIO
CPC classification number: B60C9/0042
Abstract: PURPOSE:To aim at enhancing the durability and drive-feeling of a tire, by reinforcing a tire with a belt which is formed such that fiber filments are twisted with a twisting coefficient of 0.2-0.40 to form cords and the cords are embedded in a rubber material. CONSTITUTION:Fiber filaments of polyethylene 1,2-diphenoxyethane-p,p'- dicarboxylate which are exhibited by Formula I, having a specific weight of greater than 1.340, preferably from 1.340-1.360 and an ultimate viscosity of greater than 0.75, are twisted with a twisting coefficient of 0.2-0.20, which is exhibited by Formula II, to be formed into cords. Further, when these cords are embeded in a rubber material which is obtained by being processed under a specific condition, to form a belt, they are embeded in the rubber material under such a condition that [cord diameter (mm) X beat number (cord number/5 cm) width] is below 45deg., and the angle of the cords is set to be 0-30deg. with respect to the pripheral direction of the tire. Thereby it is possible to tires having a durability equal to that of conventional steel cord tires.
Abstract translation: 目的：为了提高轮胎的耐久性和驾驶感，通过使用带状物加强轮胎，使得纤维屑以0.2-0.40的扭转系数扭转形成帘线，帘线嵌入 橡胶材料。 构成：由式I显示的具有大于1.340，优选1.340-1.360，最终粘度大于0.75的比重的聚乙烯1,2-二苯氧基乙烷-p，对二甲氧基乙烷的纤维长丝被扭曲 扭转系数为0.2-0.20，由式II显示，形成绳。 此外，当将这些帘线嵌入通过在特定条件下加工而获得的橡胶材料中以形成带时，它们以[帘线直径（mm）×节拍数（帘线）的方式嵌入橡胶材料中 数字/ 5厘米）宽度]低于45度，帘线的角度设定为0-30度。 关于轮胎的主要方向。 因此，可以轮胎具有与常规钢帘线轮胎相同的耐久性。
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公开(公告)号：JPH01257605A
公开(公告)日：1989-10-13
申请号：JP31144388
申请日：1988-12-09
Applicant: BRIDGESTONE CORP
Inventor： KADOTA KUNINOBU , IMAI ISAMU , INADA NORIO
Abstract: PURPOSE:To improve eccentric wear resistance and cut resistance and the like of the title tyre by crossing plural rubberized layers consisting of a cord made of specific material, having specific strength and initial modulus respectively at a specific cord angle, to the equatorial surface of the tyre so as to form a belt layer. CONSTITUTION:A tyre is provided with a carcass 1 with toroidal radial construction consisting of mutually parallel plural ply of organic fibre cord. A tread 3 is reinforced by belts 2 for surrounding the crown of the carcass 1. In this case, the belts 2 are formed by crossing the specific plural rubberized layers with each other a specific angle. In other words, each rubberized layer uses so-called 66 nylon polymer and is formed with a cord having the characteristic in which strength is 9.0g/d or more the status of a dipped cord treated by a binding agent after thread plying and initial modulus is less than 80g/d. The cord angle of each rubberized layer to the equatorial surface of the tyre is set within a range from 10 deg. to 70 deg..
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Patent Agency Ranking
公开(公告)号：JPS62251201A
公开(公告)日：1987-11-02
申请号：JP9220586
申请日：1986-04-23
Applicant: BRIDGESTONE CORP
Inventor： INADA NORIO , IMAI ISAMU , YAMADA SHIGEKI , KATO KENSHIRO
Abstract: PURPOSE:To prevent reduction in strength and obtain good adhesion between a cord and rubber by using a specific aromatic polyamide fiber, specifying the total denier number and the number of final twist to form a cord, and embedding said cord into a specific cord to form a carcass ply. CONSTITUTION:A toroidal carcass ply has a folded part in which only one sheet of cord layer is wound back from the inside to the outside of a tire around a bead core. The sheet of cord layer is formed by embedding, into rubber aromatic polyamide fibers which are providing mutually in parallel and nearly perpendicular to the circumferential direction of the tire. In such a structure, the cord layer is formed by using an aromatic polyamide fiber having 40mol% or above of repeated units represented by the formula I in a molecule, with the total denier number D being D>25,000 while the number of twist being two or three. And, adhesive treated cords are embedded, while being arranged in parallel, in rubber having a modulus of 100% of 40-60kg/cm .
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公开(公告)号：JPS6248692B2
公开(公告)日：1987-10-15
申请号：JP3358779
申请日：1979-03-22
Applicant: BRIDGESTONE CORP
Inventor： OOTSUKA JUNICHI , IMAI ISAMU , SUGIBASHI KYOTAKA , KUZE YASUO
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公开(公告)号：JPS6250333A
公开(公告)日：1987-03-05
申请号：JP18921085
申请日：1985-08-28
Applicant: BRIDGESTONE CORP
Inventor： IMAI ISAMU , YOTSUMOTO TOSHIHIRO
IPC: C08J5/12 , C08G69/48 , C08J5/06 , C09J5/00 , C09J5/02 , D06M13/02 , D06M13/11 , D06M15/41 , D06M15/55 , D06M15/693 , D06M101/00 , D06M101/16 , D06M101/30 , D06M101/34 , D06M101/36
Abstract: PURPOSE:To obtain the titled fiber excellent in adhesion to rubber and fatigue resistance, by treating an aromatic polyamide fiber with an aqueous solution of an epoxy compound and drying and heat-treating the fiber. CONSTITUTION:An aromatic polyamide fiber containing 50mol% or below repeating units of formula I (wherein X is -Ar1- or a group of formula II or Ar1-2 are each an aromatic group) in the molecule is treated under an applied tension of 0.01-0.5g/d with an aqueous solution or dispersion of an epoxy compound of formula III (wherein Y is H or a group of formula IV, at least two groups of formula IV are present in the molecule and n>=2), dried at 160-200 deg.C and heat-treated at 240-270 deg.C for 50-200sec. This fiber is treated with a mixture containing a condensate obtained by reacting resorcinol with formaldehyde at a molar ratio of 1:1.0-1.5 in the presence of an alkali catalyst and a rubber latex at a weight ratio (in terms of solid matter) of 10-15:100 under an applied tension of 0.01-0.5g/d, dried at 160-200 deg.C and heat-treated at 210-260 deg.C for 60-150sec under an applied tension.
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公开(公告)号：JPS61166707A
公开(公告)日：1986-07-28
申请号：JP497585
申请日：1985-01-17
Applicant: BRIDGESTONE CORP
Inventor： OSHIMA KAZUO , IMAI ISAMU
Abstract: PURPOSE:To enable a fatigue life of a tire to be improved, the tire to be extremely lightweight, and also enable fuel consumption to be saved by using as a carcass ply a 66 nylon cord, to which the specific strength is provided by intertwining the 66 nylon original yarn filament that is spinned in advance while it is highly stretched. CONSTITUTION:A carcass cord used for a carcass ply for a pneumatic bias tire of heavy duty vehicles is formed by intertwining a 66 nylon original yarn filament which is spinned in advance while it is highly stretched. In this case, the twisting coefficient of the carcass cord is represented by NT[=NX(0.139XD /rho) X10 ]. Here, N represents the number of twist per 10cm, D represents 1/2Xtotal deniel, and rho represents the specific gravity of the cord. And the 66 nylon cord, the data of which satisfy the requirement of (epsilonXTs T-51.08NT+32.843), should be used for the carcass. Here, the data is meant by the product of the twisting coefficient NT, a rate of elongation epsilon for a load of 2.68g/d, and a rate of thermal contraction Ts at the temperature of 177 deg.C when the cord is thermally contracted in a constant temperature bath for 30min under a load of 0.0198g/d.
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公开(公告)号：JPS60131302A
公开(公告)日：1985-07-13
申请号：JP23874083
申请日：1983-12-20
Applicant: BRIDGESTONE CORP
Inventor： OOSHIMA KAZUO , YOTSUMOTO TOSHIHIRO , IMAI ISAMU
Abstract: PURPOSE:To improve every characteristic inherent in a tire, by making the cord occupying efficiency of a crown part constitute the specified carcass with a specific cord in diameter, twisting coefficient, elasticity and twisting numbers, in case of a radial-ply tire having a polyester carcass. CONSTITUTION:A polyester carcass is made up of the following elements that a diameter of a polyester cord is in a range of 0.75-1.30mm., a twisting coefficient alpha shown in the specified expression (see illustration) is larger than 0.36 but less than 0.60, elasticity epsilon in time of 2.25g/d is more than 3.3% but less than 6.0%, and a twisting number N of two or three polyester cords, while a cord occupying rate a/b measured in a tire circumferential direction of a crown center part is specified to a range of 30-50%. With this constitution, those of lightweightiness, low fuel consumability, high-speed resistance, drivability and vibro-rideability are all improvable.
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