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Tire

A technology of tires and skeletons, applied in pneumatic tires, special tires, tire parts and other directions, can solve the problems of difficult to achieve pressure resistance, internal pressure resistance and rigidity, and achieve the effect of excellent adhesion and durability

Active Publication Date: 2014-11-19
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when the tire is formed of only a uniform thermoplastic resin that does not include a reinforcing member such as a carcass ply, according to JP-A No. 2003-104008, it is difficult to achieve the same pressure resistance, Resistance to internal pressure and rigidity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0225] The following is a description of a first embodiment according to the present invention with reference to the drawings.

[0226] The following is a description of the tire 10 of the present embodiment. Figure 1A A partial cross-sectional perspective view for illustrating a tire according to an embodiment of the present invention. Figure 1B is the cross section of the bead portion attached to the rim. As shown in FIG. 1, a tire 10 according to an embodiment of the present invention exhibits substantially the same cross-sectional shape as that of an ordinary conventional rubber-made pneumatic tire. In the present embodiment, the reinforcing cord 26 uses a steel cord having a twisted structure as a metal reinforcing cord member (tensile modulus of elasticity: 210000 MPa, elongation at break: 8%), and it serves as a core, the core The outer periphery of is covered with a covering compound comprising at least a thermoplastic resin and a specific elastomer. In the presen...

no. 2 approach

[0263] The following is a description of a second embodiment of the tire of the present invention with reference to the accompanying drawings. Figure 4 is a tire of the second embodiment taken along the tire rotation axis and showing a cross section of an embodiment including a reinforcing cord cover layer in which a metal reinforcing cord member has been buried on the crown of a tire case of the tire. according to Figure 4 As shown, the tire of the present embodiment has a reinforcing cord covering layer 29 in which steel cords 27 (metal reinforcing cord members) are embedded on the surface of the crown portion 16 of the tire case, and a tread 30 is placed on the reinforcing cord over the line covering layer 29. A tire according to the second embodiment has a configuration similar to that of the first embodiment, and the same reference numerals are attached to the configuration similar to the first embodiment except for the above points.

[0264] The tire of the second embo...

Embodiment

[0282] Hereinafter, the present invention will be explained more specifically based on examples.

[0283]

[0284] The components of the resins (including the covering mixture) listed in Table 1 were mixed (based on mass) and kneaded using a twin-screw extruder LABO PLASTOMILL50MR (trade name) manufactured by Toyo Seiki Seisaku-sho, Ltd. to obtain pellets .

[0285] The obtained pellets were pressurized by hot pressing at 200° C., and the resultant was trimmed to manufacture a sample having a size of 120 mm×120 mm and a thickness of 2.0 mm.

[0286] Each sample was die-cutting according to JIS K6251:1993 definition to prepare a dumbbell-shaped test sample (test sample No. 5).

[0287] Then use precision universal testing machine SHIMADZU AUTOGRAPH AGS-J (trade name, load 5KN) manufactured by Shimadzu Corporation, measure the tensile modulus of elasticity, elongation at break of each dumbbell-shaped test sample under the elongation speed of 200mm / min rate and tensile streng...

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Abstract

This tire has: a tire frame that is annular and is formed from a resin material; and a reinforcing metal cord member that is wound to the outer periphery of the tire frame. At least a portion of the reinforcing metal cord member is covered by a covering mixture containing at least a thermoplastic resin and a specific elastomer selected from the group consisting of the belowmentioned (1) to (3): (1) a polyurethane thermoplastic elastomer; (2) a polystyrene thermoplastic elastomer; and (3) an olefin thermoplastic elastomer containing at least one selected from the group consisting of an acid-modified olefin thermoplastic elastomer having a modulus of elasticity of less than 140 MPa and an acid-unmodified olefin thermoplastic elastomer having a modulus of elasticity of less than 140 MPa.

Description

technical field [0001] The present invention relates to a tire for mounting to a rim, and particularly to a tire in which at least a portion of the tire casing is formed of a resin material. Background technique [0002] Pneumatic tires for vehicles such as cars are known to be composed of rubber, organic fiber materials, steel members, and the like. [0003] In recent years, the use of resin materials, especially thermoplastics and thermoplastic elastomers, as tire materials is being studied from the perspective of light weight, easy molding, and easy recycling. [0004] For example, Patent Document 1 (Japanese Patent Application Laid-Open (JP-A) No. 2003-104008) and Patent Document 2 (JP-A No. H03-143701) describe a pneumatic tire made of thermoplastic Polymer materials, especially thermoplastic polyester elastomers. [0005] Compared with tires made of conventional rubber, tires using polymer materials (resin materials) having thermoplastic properties are easier to manu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C5/01B60C1/00B60C9/00B60C9/04C08J5/06C08L53/02C08L77/00
CPCB60C2009/2242B60C5/007B60C5/01C08L77/02B60C2009/2238C08L75/04C08L53/025B60C1/0041B60C9/0007B60C2009/0021B60C2009/0078
Inventor 原田高志笔本启之町田邦郎
Owner BRIDGESTONE CORP
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