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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：JPH0376840A
公开(公告)日：1991-04-02
申请号：JP20962889
申请日：1989-08-15
Applicant: BRIDGESTONE CORP
Inventor： KIKUCHI MICHITSUGU , INADA NORIO
Abstract: PURPOSE:To obtain the subject fiber having excellent adhesion with rubber and high-speed durability, etc., comprising filament of a core-sheath double structure to have mutually corresponding hooking uneven inversely at the outer surface of the core part and the inner surface of the sheath part and tightly engaging mutually. CONSTITUTION:For instance, a core part 1 is constructed with polyethylene naphthalate, etc., and sheath part 2 is constructed with a different polymeric material such as nylon 66, then the outer surface of the core part 1 and the inner surface of the sheath part 2 have mutually hooking uneven inversely so as to mutually tightly engage to afford the objective fiber. Besides, preferably, the height (a) of the protruding part measured in the direction to the center of said fiber is 5-30% of the fiber breadth (d) between the farthest two points on contour of the fiber and the hooking length (b) of the overhang breadth to the side direction of the protruding part is 5-30% of the fiber maximal breadth (d), and further the breadth of the bottom part (c) is 10-20% of the fiber maximal breadth (d).
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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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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：JP2003154810A
公开(公告)日：2003-05-27
申请号：JP2001351565
申请日：2001-11-16
Applicant: BRIDGESTONE CORP
Inventor： INADA NORIO
Abstract: PROBLEM TO BE SOLVED: To provide a radial tire that is improved in the separation resistance of a belt layer by reducing strain and suppressing cracks at a belt end. SOLUTION: The pneumatic radial tire comprises a pair of right and left ringed bead parts, a pair of right and left sidewalls parts continuous to the respective bead parts, and a crown part straddling between both sidewall parts, and is reinforced by at least one annularly formed carcass ply layer and further reinforced by a plurality of inextensible belt layers arranged on a crown circumference of the carcass layer. A nonwoven fabric fiber-rubber complex wherein a nonwoven fabric of organic fiber is impregnated with a rubber component is arranged at tire width ends of at least one belt layer.
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公开(公告)号：JPH06143913A
公开(公告)日：1994-05-24
申请号：JP29279092
申请日：1992-10-30
Applicant: BRIDGESTONE CORP
Inventor： INADA NORIO , TAKANAMI TAKESHI , TOGASHI MINORU
Abstract: PURPOSE:To maintain enough anti-burst pressure and to lighten the weight of a tire by providing two or more auxiliary layers between carcass ply, using super high strength polyamide fiber cord with the predetermined strength value as a reinforcing fiber cord, and setting the predetermined value for an inclination of the reinforcing fiber cord on the tire equatorial face to the tread circumferential direction. CONSTITUTION:A reinforcing layer 3 of two or more layers, which consist of reinforcing fiber cords, is arranged between carcass ply, and super high strength polyamide fiber cord with the strength of 9.0gr/d or the more is used for each of the reinforcing fiber cord of the reinforcing layer 3 and more than a half of the ply of the carcass. When the inclinations to the tread circumferential direction for the reinforcing layer 3 on the tire equatorial face E and each of the reinforcing fiber cords of the carcass ply next to the reinforcing layer 3 are set to be alpha deg. and beta deg. individually, 3 deg.
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公开(公告)号：JPH04191103A
公开(公告)日：1992-07-09
申请号：JP32066790
申请日：1990-11-27
Applicant: BRIDGESTONE CORP
Inventor： KODAMA SUNAO , INADA NORIO , ONIKI TORU
Abstract: PURPOSE:To enhance weather resistance and cut resistance as well as to make a tire light in weight by letting those such as rupture strength, rupture elongation, counts and side wall gauge be specifically related with one another, letting each carcass cord be composed of a mono-filament organic fiber cord in a flat shape in cross section where each minor axis and minor axis/major axis are specified, and thereby specifying the rubber constituents of side rubber. CONSTITUTION:A radial tire is made up of the layer of a carcass ply where fiber cords are arranged so as to be 90 deg. to 75 deg. to the circumferential direction. In this case, the relation ship indicated by formulas I and II shall be satisfied by the fiber cords characterized by those such as rupture strength Tb(kg), rupture elongation(%), the count N of a crown section and the total gauge S(mm) of a side wall at its thinnest section. And each fiber cord shall be composed of a mono-filament in a flat shape in cross section where a minor axis D1 is 0.2 to 0.5mm, major axis D2/minor axis D1 is 2.0 to 5.0. And side rubber shall contain 15 to 45 parts of ter polymers by weight in a ethylen.propyne.dien series. And the side wall total gauge S shall be less than 4.0mm.
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公开(公告)号：JPH04123908A
公开(公告)日：1992-04-23
申请号：JP24387090
申请日：1990-09-17
Applicant: BRIDGESTONE CORP
Inventor： IWASAKI SHIZUO , INADA NORIO
Abstract: PURPOSE:To reduce the weight of a tire and to secure the safety and reliability of a bead by using a bead reinforcing member formed of an organic fiber-resin complex cord meeting a specified condition. CONSTITUTION:A tire is at least provided with a bead 1, bead filler 2, and a carcass ply 3. In this case, an organic fiber-resin complex cord composed of a fiber aggregate formed of an organic fiber practically bundled in mutually parallel and a resin filled in the gap of the fiber aggregate is prepared. In addition to that, the bead 1 is provided with the organic fiber-resin complex cord which has the modulus of longitudinal elasticity of 1000kg/mm or more, tensile strength of 1000kg or more, and the weight ratio of the above resin being within 25-80% by weight to the whole of the organic fiber-resin complex cord as a reinforcing member.
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