公开(公告)号：JPH03292204A

公开(公告)日：1991-12-24

申请号：JP9409890

申请日：1990-04-11

Applicant: BRIDGESTONE CORP

Inventor： KIKUCHI MICHITSUGU ,  INADA NORIO

IPC: B60C9/18 ,  B60C9/00 ,  B60C9/20 ,  B60C9/22 ,  D01F8/14 ,  D02G3/48

Abstract: PURPOSE:To improve durability against high speed remarkably by reinforcing at least an end of a belt layer more with a cord layer between the belt layer and a tread layer, and using the material made of the specified component including polyester ether and having the compound structure which consists of a core and a sheath as a cord member of the cord layer. CONSTITUTION:A tire has two belt layers 2, 3 of which cord arrangement are crossed at 10 - 40 deg. against the circumferential direction of the tire. In this case, one cord layer 5 is provided between the belt layer 2 near the tread face and a tread layer 1. The core component made of compound fiber having the compound structure, which consists of a core and a sheath, and to be used for reinforcing the cord layer 5 is practically made of the mixture component of polyester mainly composed of polyethylene terephthalate and polyester ether mainly composed of polyethylene - 1, 2 - diphenoxy ethane - p, p' - dicarboxylate. A mixture ratio of polyester mainly composed of polyethylene terephthalate among the core component is set at 30 - 90 weight %. Furthermore, a ratio of the compound fiber among the core component is set at 30 - 80 weight %.

公开(公告)号：JPH03157206A

公开(公告)日：1991-07-05

申请号：JP3715790

申请日：1990-02-20

Applicant: BRIDGESTONE CORP

Inventor： IWASAKI SHIZUO ,  INADA NORIO

IPC: B60C9/00 ,  B60C9/20 ,  B60C9/26 ,  D02G3/48

Abstract: PURPOSE:To improve maneuvering stability, ride feeling, and durability or the like by using a high power and high elastic modulus PVA fiber as a cord in one hand belt reinforcing layer, and specifying the properties or arranging conditions of the cord. CONSTITUTION:A tire is formed in which a PVA fiber code is buried in rubber in one layer of belt reinforcing layers 3 and 4 having two layers or more. In this case, the cord strength S(kg) and the cord cutting ductility U(%) of a cord, taken out from the belt reinforcing layer of the PVA fiber cord, and the number of placing T per 5cm, in the crown center part of the reinforcing layer, are set to have a relation: 12(SXT)+1000U>28000. The cord diameter L(mm) of the PVA fiber code and the said number of placing T are set to have a relation: (LXT/50)X100 dyn/cm dyn/cm .

公开(公告)号：JPH0382607A

公开(公告)日：1991-04-08

申请号：JP21611389

申请日：1989-08-24

Applicant: BRIDGESTONE CORP

Inventor： IWASAKI SHIZUO ,  INADA NORIO ,  TAKASE KIYOSHI

IPC: B60C9/00 ,  B60C9/18 ,  B60C9/20

Abstract: PURPOSE:To improve durability to a great extent by using high-strength high- elasticity polyvinyl alcohol fibers having specific dynamic elasticity and the insoluble component at a specific ratio for cords extracted from a belt layer. CONSTITUTION:A tire for a motorcycle has a pair of bead sections, a carcass layer folded around them and having cords intersecting a tire equatorial plane at the angle 90-25 deg., and a belt layer having cords intersecting the tire equatorial plane at the angle 0-40 deg.. Specific high-strength high-elasticity polyvinyl alcohol fibers are used for cords extracted from the belt layer. The dynamic elasticity E' of the specific fibers at 100 deg.C and 30Hz is set to satisfy the following equa tion: 0.3X10 dyn/cm dyn/cm , and the insoluble component when the fibers are dissolved in dimethyl sulfoxide at 120 deg.C is set to 5 wt.% or above.

公开(公告)号：JPH0376841A

公开(公告)日：1991-04-02

申请号：JP20962989

申请日：1989-08-15

Applicant: BRIDGESTONE CORP

Inventor： KIKUCHI MICHITSUGU ,  INADA NORIO

IPC: B60C9/00 ,  C08J5/06 ,  D01D5/36 ,  D01F8/14 ,  D02G3/02 ,  D02G3/48

Abstract: PURPOSE:To obtain the subject fiber useful for tire cord, etc., having excellent adhesion with rubber, heat resistance and fatigue resistance inside rubber, etc., comprising a filament having a core-sheath structure of plural core parts and the sheath part made of a polymer different from core part. CONSTITUTION:The objective fiber is composed of a filament having a core- sheath structure constructed by at least two core parts 1 and a sheath part 2 made of a polymer different from the core part enveloping around the core parts.

公开(公告)号：JPH0374203A

公开(公告)日：1991-03-28

申请号：JP20962789

申请日：1989-08-15

Applicant: BRIDGESTONE CORP

Inventor： INADA NORIO ,  KIKUCHI MICHITSUGU

IPC: B60C9/00 ,  B60C9/04 ,  D01F6/62 ,  D01F8/14 ,  D02G3/48

Abstract: PURPOSE:To remarkably increase durability in high speed running of a vehicle by providing a carcass ply layer, in which organic fiber cords of a core- sheathing structure, arranged parallel with each other, are arranged at a prescribed cord-angle, thereby forming a pneumatic tire. CONSTITUTION:Organic fiber cords are manufactured by intertwining organic fiber base yearns having a core-sheath structure consisting of a core part and a sheath part, which covers a circumference of the core part. A pneumatic tire is formed by providing at least one layer of carcass ply layer, in which the said organic fiber cords are placed parallel with each other, is arranged at a cord angle of 40 deg. to 90 deg. with respect to the equatorial plane of the tire. The said core part is formed with polyurethane naphthalene-2,6-dicarboxylate having a repeating unit as shown in the expression-I, while the sheath part is formed with polyamide. In addition, the core part should be 30 to 90weight% the entire base yarns.

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

IPC: B60C9/00 ,  B60C9/08 ,  B60C15/00 ,  B60C15/06 ,  D02G3/48

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).

公开(公告)号：JPS62166101A

公开(公告)日：1987-07-22

申请号：JP773386

申请日：1986-01-16

Applicant: BRIDGESTONE CORP

Inventor： YOTSUMOTO TOSHIHIRO ,  INADA NORIO ,  IMAI ISAMU

IPC: B60C9/00 ,  B60C1/00 ,  B60C9/08

Abstract: PURPOSE:To improve the durability of the above-captioned radial tire for an air-plane or the like by impregnating a specified fiber cord with a specified impregnant to constitute a carcase ply cord and belt ply cord into a cord matrix material. CONSTITUTION:A carcase ply cord 1 and a belt ply cord 6 are selectively constituted from aromatic polyester fiber, aromatic polyamide fiber and vinyl alcohol fiber having 15g/d or more of strength. And these cord filaments are impregnated with aqueous solution of rubber latex and epoxi compound or blocked isocyanate and vulcanizing accelerator in the wt% of 100:1-30:1-30 or organic solvent solution containing rubber polymer, denatured rubber polymer and resorcinol folmaldehyde resin or epoxi compound in the mixed rate of 100:1-30. By this constitution can be improved the durability of the captioned tire.

公开(公告)号：JPS62163805A

公开(公告)日：1987-07-20

申请号：JP357186

申请日：1986-01-13

Applicant: BRIDGESTONE CORP

Inventor： YOTSUMOTO TOSHIHIRO ,  INADA NORIO ,  IMAI ISAMU

IPC: B60C9/04 ,  B60C9/00 ,  B60C9/08 ,  B60C9/18 ,  D02G3/48

Abstract: PURPOSE:To improve durability, by providing carcass cord layers and belt cord layers, respectively having specific construction, and using a cord combined material, in which a filament is enveloped in an impregnation agent to form a matrix, for a stand cord in each of these cord layers. CONSTITUTION:A tire has one or more pairs of right and left bead wires, and the tire provides at least one or more carcass cord layers 2, which are fixed turning back around at least one or more of the bead wires having a cord angle of 75-95 deg. with respect to the peripheral direction of the tire, and one or more sheets of belt cord layers 1 using cords having an angle of 0-30 deg. with respect to the peripheral direction. And a strand cord of each cord layer 1, 2 uses a cord combined material in which respective filament, using aromatic polyamide and total aromatic polyester fiber or polyvinyl alcohol fiber of strength 15g/d or more, envelops the periphery by an impregnation agent, mainly composed of rubber-state components, to form a matrix.

公开(公告)号：JPS6226103A

公开(公告)日：1987-02-04

申请号：JP16567885

申请日：1985-07-29

Applicant: BRIDGESTONE CORP

Inventor： INADA NORIO ,  IMAI ISAMU

IPC: B60C9/22 ,  B60C9/18

Abstract: PURPOSE:To make improvements in corrosion resistance, high-speed durability and driving comfortableness, by setting up a cap ply part consisting of a thermal contractible organic fiber cord between an outermost layer of belt parts having carbon fiber cord embedded layers of more than one ply and a tread part. CONSTITUTION:A belt part 2 is made up of combining more than one ply of carbon fiber cord layers embedded in rubber of 30kg/cm -60kg/cm in 100% modulus in parallel at a small angle with the circumferential direction. And, a cap ply part 3, disposing thermal contractible organic fiber cords parallelly in a tire circumferential direction, is set up between an outermost layer of this belt part 2 and a tread part 4. With this constitution, corrosion resistance, high-speed durability and driving comfortableness are all improved without entailing any damage to abrasion resistance and steerability and, what is more, crushability in a carbon fiber is improvable.

公开(公告)号：JPS6171204A

公开(公告)日：1986-04-12

申请号：JP19066084

申请日：1984-09-13

Applicant: Bridgestone Corp

Inventor： IMAI ISAMU ,  INADA NORIO

IPC: D02G3/26 ,  B29D30/38 ,  B60C1/00 ,  B60C9/00 ,  B60C9/02 ,  B60C9/04 ,  D02G3/48

CPC classification number: B60C9/0042 ,  B60C9/005

Abstract: PURPOSE:To obtain a composite cord with improved durability by applying preset upper and lower plies to a filament made of polyester or nylon and all aromatic polymide with preset strength to form the cord and burying it in the rubber with preset dynamic modulus of elasticity. CONSTITUTION:The lower ply whose ply coefficient is 0.40-0.60 is applied to a polyester or nylon filament exceeding the strength 7g/d as given in Expression 1 and the lower ply in the same direction is also applied to all aromatic polyamide filament bundle within the rage of Expression 3 with regard to the ply coefficient given in Expression 2. Using one to three bundles of the polyester filament and one to four bundles of the all aromatic filament, the upper ply reverse to the lower ply is applied with regard to the ply coefficient given in Expression 4 within the range of Expression 5 and an adhesive agent is applied and then high temperature treatment is performed. then, the cord with the strength exceeding 8.5g/d is obtained as the ply by being buried in the rubber whose dynamic modulus of elasticity is 3X10 -10X10 dyn/cm the rubber whose dynamic modulus of elasticity is 3X10 -10X10 dyn/cm rubber. As a result of this structure, a composite cord with high durability can be obtained.

Abstract translation: 目的：通过将预定的上层和下层施加到由聚酯或尼龙制成的长丝和具有预定强度的所有芳族聚酰胺形成帘线并将其埋在橡胶中并具有预设的动态弹性模量，以获得具有改善的耐久性的复合帘线。 构成：层数为0.40-0.60的下层施加于超过表1所示强度7g / d的聚酯或尼龙长丝，并且相同方向的下层也施加到所有芳族聚酰胺长丝束内 表达式3对于表达式2中给出的帘布层系数的影响。使用一至三束聚酯长丝和一至四束全部芳香长丝，相对于帘布层应用与下层相反的上层 表达式4中给出的系数在表达式5的范围内，并施加粘合剂，然后进行高温处理。 然后，通过将动态弹性模量为3×10 -7至10×10 7 dyn / cm 2的橡胶埋入橡胶中，获得强度超过8.5g / d的帘线作为帘布层，其动态模量 弹性为3×10 -7 -10 -10 10 dyn / cm 2橡胶。 作为这种结构的结果，可以获得具有高耐久性的复合帘线。