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公开(公告)号：JPH03227606A
公开(公告)日：1991-10-08
申请号：JP29716290
申请日：1990-11-05
Applicant: BRIDGESTONE CORP
Inventor： IMAI ISAMU , OSHIMA KAZUO , INADA NORIO
IPC: B60C9/00 , B29C33/04 , B29C35/16 , B29D30/00 , B29D30/38 , B29K21/00 , B29L30/00 , D01F6/62 , D02G3/48
Abstract: PURPOSE:To improve drastically durability, by a method wherein a cord of a polyester fiber obtained by performing high-stress spinning is high-tensile-heat- treated and a post-cure inflation condition to be applied to a tire made by making use of the high-tensile-heat-treated cord for a carcass ply is specified. CONSTITUTION:A polyester fiber cord is made so that the same possesses microscopic properties where intrinsic viscosity viscosity is 0.75-0.97, specific gravity is 1.365-1.398, a double refractive index DELTAn is 165X10 -195X10 and a number of terminal carboxyl groups are 20 or less and a twisting index NT is within 0.4-0.6 as a fiber, in a radial tire provided with a carcass ply into rubber of which a polyester cord is laid. Postcure inflation holding an inner temperature of a tire shoulder part is performed at 95 deg.C at the lowest under filling state of inner pressure P corresponding to a coefficient alpha of carcass tension. It is made that elongation DELTA En at the tension of the cord of 2g/denier is 4.5% or less and the total of the elongation DELTA En and a heat shrinkage factor DELTA S is 8.0% or less.
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公开(公告)号：JPS63282374A
公开(公告)日：1988-11-18
申请号：JP11342687
申请日：1987-05-12
Applicant: BRIDGESTONE CORP
Inventor： IMAI ISAMU , INADA NORIO , WADA ICHIRO
IPC: B29D30/40 , C08J5/06 , D06M10/00 , D06M10/02 , D06M15/00 , D06M101/00 , D06M101/16 , D06M101/30 , D06M101/34 , D06M101/36
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公开(公告)号：JPS63106103A
公开(公告)日：1988-05-11
申请号：JP14525987
申请日：1987-06-12
Applicant: BRIDGESTONE CORP
Inventor： IMAI ISAMU , INADA NORIO
Abstract: PURPOSE:To prevent ply separation by constituting a tyre for airplane, etc. in the caption of an up/down type toroid shaped radial construction carcass made of organic fiber cord having a specific thermal contraction coefficient, a belt layer and a cable bead core. CONSTITUTION:Plies consisting of organic fiber whose thermal contraction coefficient is above 1.0% and below 10.0 at 177 deg.C, e.g., nylon, etc. are laminated and a carcass having up/down type toroid shaped radial construction is formed. And a belt 5, which is formed by arranging, at a cord angle close to 0 deg. to the circumference of a carcass crown, and laminating plural layers arranged, in parallel, with organic fiber cord whose initial elastic modulus is 150g/d at minimum, is so provided as to surround the crown area of the carcass. Besides a bead core 1 is formed info a cable bead core having a round section by winding steel wire spirally round a core wire. By this constitution, ply separation can be prevented.
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公开(公告)号：JPS62163808A
公开(公告)日：1987-07-20
申请号：JP584186
申请日：1986-01-13
Applicant: BRIDGESTONE CORP
Inventor： IMAI ISAMU , YOTSUMOTO TOSHIHIRO , INADA NORIO
Abstract: PURPOSE:To promote the lightness of weight and the holding of high internal pressure further the improvement of running durability, by filling a filament group clearance of a cord, consisting of fiber of large strength and high elastic modulus, with a rubber-stage material so that the fiber of large strength and high elastic modulus improves its bending and fatigue characteristic. CONSTITUTION:A radial tire has one ore more pairs of bead wires, and the tire provides carcass ply cord layers 2, 3, which are fixed turning back around the periphery of each bead wire and having an angle of 0-15 deg. with respect to a radial direction, while belt ply cord layers 4-8 having an angle of 0-30 deg. with respect to the peripheral direction. In the above construction, at least one of the cords 9, 10 of each cord layers is formed from at least one kind of the aromatic polyamide fiber, total aromatic polyester fiber and the polyvinyl alcohol fiber of strength 15g/d or more. And the cord forms in its section matrix construction of seaisles pattern by filling a clearance of a group of filaments 11, forming said cord, with a rubber-state material 12.
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公开(公告)号：JPS61166706A
公开(公告)日：1986-07-28
申请号：JP666585
申请日：1985-01-19
Applicant: BRIDGESTONE CORP
Inventor： OKA TAKESHI , IMAI ISAMU
Abstract: PURPOSE:To restrain shimmy (vibration around a steering wheel) and chattering (vertical oscillation of wheels) from taking place by forming a cord of a carcass ply of a pneumatic tire by intertwining at least several bandles of organic fiber filaments. CONSTITUTION:A tire 1 for a motorcycle includes a pair of left and right sides walls 2, and a tread 3 in a convex form which is located between the both side walls 2 and 2 and can be elongated to the maximum width of WT. And both the side walls 2 and the tread 3 are reinforced by a carcass 4 where numbers of organic fiber plies are plied so as to allow their cords to intersect each other. In addition, a layer of a breaker is arranged in a crown section which is outside of the carcass 4 to reinforce the crown section. In this case, the cord 8 of the carcass ply is formed by intertwining at least 3 bandles of a number of organic fiber filaments.
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Patent Agency Ranking
公开(公告)号：JPS5975804A
公开(公告)日：1984-04-28
申请号：JP18481682
申请日：1982-10-21
Applicant: Bridgestone Corp
Inventor： IMAI ISAMU , OOSHIMA KAZUO , INADA NORIO
CPC classification number: B60C9/0042 , B60C9/08 , D02G3/48 , D10B2331/04
Abstract: PURPOSE: To sharply increase durability of a highly durable radial tire in which a polyester fiber cords are used as the carcass ply by combining polyester spun under high stress with an optimum post-cure inflation condition.
CONSTITUTION: The polyester fiber cord used in this highly durable radial tire is manufactured under the combination of such conditions that, as a fiber, the limit viscosity is 0.75W0.97, the specific gravity is 1.365W1.398, the birefringence ΔN is 165×10
-3 -195×10
-3 , it has microscopic properties that the terminal carboxyl group is 20 or less, and the coefficient of twist NT is in the range of 0.4W0.6, with that, after the post-cure infration process for maintaining the inside temperature of the tire shoulder at least at 95°C under an inside pressure P meeting the carcass tensile force factor α, the elongation ΔE
n of the cord at a tensile force of 2 gram/denier is 4.5% or less, and the sum of this elongation ΔE
n and the heat shrinkage rate ΔS is 8.0% or less.
COPYRIGHT: (C)1984,JPO&JapioAbstract translation: 目的：通过在高应力下将聚酯纺丝与最佳的后固化充气条件相结合，大幅增加使用聚酯纤维帘线作为胎体帘布层的高耐用子午线轮胎的耐久性。 构成：在这种高度耐用的子午线轮胎中使用的聚酯纤维帘线通过以下条件的组合制造，即作为纤维，极限粘度为0.75-0.97，比重为1.365-1.398，双折射DELTAN为165×10 < 3> -195X10 <-3>，具有末端羧基为20以下的微观特性，扭转系数NT在0.4〜0.6的范围内，维持后固化后的渗透过程 轮胎胎肩的内部温度在满足胎体张力系数α的内部压力P下至少在95℃时，帘线在2克/旦尼尔的张力下的伸长率DELTAEn为4.5％以下， 该伸长率DELTAEn和热收缩率DELTAS之和为8.0％以下。
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公开(公告)号：JPH01314743A
公开(公告)日：1989-12-19
申请号：JP32477888
申请日：1988-12-24
Applicant: BRIDGESTONE CORP
Inventor： IMAI ISAMU , NISHIKAWA TOMOHISA , INADA NORIO
Abstract: PURPOSE:To provide the subject tire having improved decomposition resistance by amine, good high speed durability and good reclamation durability by reinforcing with organic fiber cords having a specific polyester/polyamide core-sheath structure. CONSTITUTION:Organic fiber cords constituting a carcass supply layer 4 are composed of cords produced by twisting organic fibers having a polyester/ polyamide core-sheath structure. The intrinsic viscosity of the polyester forming the core portion is >=0.8 and the ratio of the weight of the core portion to that of (the core portion + the sheath portion) is 0.3-0.9. The cords are embedded in an embedding rubber containing >=50% of polyisoprene to form a carcass supply layer, thereby remarkably improving the amine decomposition resistance of the organic fiber cords.
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公开(公告)号：JPH0120081B2
公开(公告)日：1989-04-14
申请号：JP5255683
申请日：1983-03-30
Applicant: BRIDGESTONE CORP
Inventor： IMAI ISAMU , OOSHIMA KAZUO , TANAKA KENICHI , INADA NORIO
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公开(公告)号：JPS63282368A
公开(公告)日：1988-11-18
申请号：JP11241287
申请日：1987-05-11
Applicant: BRIDGESTONE CORP
Inventor： WADA ICHIRO , INADA NORIO , IMAI ISAMU
IPC: D06M11/00 , D06M11/38 , D06M11/44 , D06M11/45 , D06M11/46 , D06M11/47 , D06M11/48 , D06M11/49 , D06M101/00 , D06M101/16 , D06M101/30 , D06M101/34 , D06M101/36
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公开(公告)号：JPS6349504A
公开(公告)日：1988-03-02
申请号：JP19217386
申请日：1986-08-19
Applicant: BRIDGESTONE CORP
Inventor： KATO KENSHIRO , YAMADA SHIGEKI , INADA NORIO , IMAI ISAMU
Abstract: PURPOSE:To improve the antifatigueness by forming the cords used in the specific width region of a belt reinforced body surrounding the crown part of a carcass ply from the aromatic polyamide fibers consisting of a plurality of units represented by the specific chemical formulas. CONSTITUTION:One ply layer of a carcass ply has a turned-over part 3 on the periphery of a pair of bead cores. A belt reinforced body surrounding the crown part of the carcass ply is formed by laminating the belt layers consisting of the aromatic polyamide cords and extended in the tire width direction to a shoulder part. The cord used in all the width part of the belt layers on the outside in the radial direction for the neutral axis related to the bending in the peripheral direction of the belt reinforced body and in the width region containing at least the belt edge of the belt layers having the belt width over 0.8 times of the max. grounded width is formed from the aromatic polyamide fibers consisting of the units A and B represented by the formulas I and II.
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