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Tire

A technology based on tires and polyamides, applied in the direction of pneumatic tires, special tires, tires, etc., to achieve the effect of excellent rim installation

Active Publication Date: 2018-08-03
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Tires using thermoplastic polymer materials can be produced more easily and at a lower cost than conventional tires made of rubber

Method used

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Experimental program
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Effect test

no. 1 approach

[0154] A tire according to a first embodiment of the present invention is described below with reference to the drawings.

[0155] The tire 10 of the present embodiment is described below.

[0156] Figure 1A is a perspective view showing a section of a part of a tire according to an embodiment of the present invention. Figure 1B It is a sectional view of the bead portion attached to the rim. Such as Figure 1A As shown in , the tire 10 of the present embodiment has substantially the same cross-sectional shape as those of conventional usual rubber-made pneumatic tires.

[0157] Such as Figure 1A Shown in , the tire 10 includes the following carcass (tire frame) 17, and the carcass (tire frame) 17 includes: Figure 1B A pair of bead portions 12 each in contact with a bead seat 21 and a rim flange 22 of a rim 20 shown in ; a sidewall portion 14 extending outward in the tire radial direction from each bead portion 12 ; and a sidewall portion A crown portion 16 (peripheral...

no. 2 approach

[0196] Next, a second embodiment of the tire of the present invention is described below with reference to the drawings. Similar to the first embodiment, the tire in this embodiment has substantially the same cross-sectional shape as those of conventional usual rubber-made pneumatic tires. Thus, in the drawings described below, the same reference numerals are assigned to the same constituents as those of the first embodiment, and descriptions thereof may be omitted. Figure 4A is a sectional view of the tire of the second embodiment taken along the tire width direction, and Figure 4B is an enlarged sectional view of a bead portion taken along the tire width direction, showing a state in which a rim is mounted to the tire of the second embodiment. Figure 5 is a sectional view taken along the tire width direction, showing the periphery of the reinforcing layer of the tire of the second embodiment.

[0197] In the tire of the second embodiment, the carcass 17 is formed of the...

Embodiment 1

[0300] Synthesis of Polyamide-Based Thermoplastic Elastomers

[0301] In a 2-liter reaction vessel equipped with a stirrer, a nitrogen inlet, and a condensed water outlet, 77.4 g of sebacic acid (dicarboxylic acid), 10.1 g of 1,4-aminobutane (diamine), 263 g of PPG / PTMG / PPG (polymer forming the soft segment: triblock polyether diamine having amino groups at both ends, trade name: ELASTAMINE (registered trademark) RT-1000, manufactured by HUNTSMAN Corporation), 150 g of pure water, and 0.7 g of sodium hypophosphite, and mix these materials.

[0302] The resulting mixture was subjected to nitrogen substitution, followed by heating to 240°C under sealed pressure. After the container pressure reached 0.5 MPa, the pressure was slowly released, and the mixture was stirred at 240° C. for 5 minutes under a nitrogen stream to obtain a polyamide-based thermoplastic elastomer. The weight-average molecular weights of the polyamide-based thermoplastic elastomers thus obtained are shown...

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Abstract

Disclosed is a tire which is provided with: an annular tire carcass that contains a polyamide-based thermoplastic elastomer which has a hard segment and a soft segment and wherein the hard segment contains a copolymer of a dicarboxylic acid having 4 to 12 carbon atoms (inclusive) and a diamine having 4 to 12 carbon atoms (inclusive) and the soft segment contains a polyamine; and a reinforcing cordlayer that contains a reinforcing cord member which is wound around an outer circumferential part of the tire carcass in the tire circumferential direction at an average interval of from 0.4 mm to 3.2 mm (inclusive) in the tire width direction.

Description

technical field [0001] The present invention relates to tires. Background technique [0002] Conventionally, as pneumatic tires for vehicles such as passenger cars, tires in which resin materials, particularly thermoplastic resins and thermoplastic elastomers, etc. are used as materials have been studied from the viewpoints of light weight, ease of molding, and recyclability. Such thermoplastic polymer materials have many advantages from the viewpoint of improving productivity, for example, they are injection moldable. [0003] For example, forming a tire frame of a tire from a thermoplastic resin material and using a polyamide-based thermoplastic elastomer as a thermoplastic resin material have been proposed (for example, Japanese Patent Application Laid-Open (JP-A) No. 2012-046030). Contents of the invention [0004] The problem to be solved by the invention [0005] Tires using thermoplastic polymer materials can be produced more easily and at lower cost than convent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C5/01B60C7/00B60C9/22C08G69/40
CPCB60C9/22B60C5/01B60C7/00C08G69/40B60C9/2204B60C5/007B60C2007/005B60C2009/2266B29D30/08B60C1/0041B60C9/0007B60C9/04B60C2009/0441
Inventor 樽谷泰典
Owner BRIDGESTONE CORP
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