pneumatic tire

A technology of pneumatic tires and tires, applied in tire parts, tire tread/tread pattern, rolling resistance optimization, etc., can solve problems such as radio noise and driver discomfort, and achieve radio noise suppression, easy formation, and productivity. excellent effect

Inactive Publication Date: 2016-08-03
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Static electricity causes radio noise
In addition, static electricity can cause discomfort to the driver due to sparking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] made with figure 1 and 2 The structure of the tire shown. The size of this tire is "195 / 65R15". The tire has a through portion. The penetrating portion has a topping rubber and a cord. The topping rubber is molded by crosslinking a rubber composition. The rubber composition comprises: 100 parts by mass of styrene-butadiene copolymer (trade name "SBR1500" of JSR Company), 50 parts by mass of silicon dioxide (trade name "ULTRASILVN3" of Degussa Company), 5 parts by mass Silane coupling agent (trade name "Si69" of Degussa Company), 1 part by mass of wax (trade name "SUNNOCN" of Ouchi New Chemical Industry Co., Ltd.), 2 parts by mass of anti-aging agent (Trade name "SUNNOCN" of Ouchi New Chemical Industry Co., Ltd. product name "NOCRAC6C"), 1 part by mass of stearic acid (NOF Corporation), 3 parts by mass of zinc oxide (trade name "Yaqianhua No. 1" of Mitsui Metal Mining Co., Ltd.), 1.5 parts by mass of powdered sulfur (Tsurumi Chemical Co., Ltd.) and 1 part by mass ...

Embodiment 2-15

[0115] Tires of Examples 2-15 were obtained in the same manner as in Example 1, except that the specifications of the penetration portions were as shown in Tables 1-4 below.

Embodiment 16

[0121] Filament bundles are formed by twisting non-conductive filaments and conductive filaments. The conductive filaments are formed of polypyrrole. The non-conductive filaments are formed from nylon 66. The fineness of this filament bundle was 1400 dtex / n. The filament bundle is twisted to form a cord. The intrinsic volume resistance of the cord is 1×10 3.2 Ω·cm. The cord has a diameter of 0.32 mm. The angle of the cord with respect to the circumferential direction is 90°. The cord has a length of 1.5 cm. These cords have a density of 15 Ends / 5 cm. The total volume of cords contained in 1 tire is 0.66cm 3 . Other configurations were the same as in Example 1 to obtain a tire of Example 16.

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PUM

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Abstract

The invention provides a pneumatic tire (2), which is easy to discharge static electric. Energy consumption is low, and efficiency is high. The tire (2) has a through portion (46) passing through the tire surface, the through portion (46) has bonding rubber (70) and a plurality of cord threads (72) which are not conductive. The rubber composite of the bonding rubber (70) contains SiO2 as main additive. The cord threads (72) are extended along the direction vertical to the circumference direction of the tire surface (32) and are conductive. One end (74) of each cord thread (72) is exposed on the tire surface (33), and the other end (76) is exposed on the inner surface (78) of the tire surface (32). The cord threads (72) include a plurality of long wires comprising long wire substrates and conductive bodies covering the long wire substrates.

Description

technical field [0001] The present invention relates to pneumatic tires. Specifically, the present invention relates to a pneumatic tire having a non-conductive tread. Background technique [0002] As a reinforcing agent for tire treads, carbon black is generally used. Carbon black is a conductive substance. A tread containing carbon black is excellent in electrical conductivity. Static electricity generated in the vehicle is discharged from the tire to the road surface. [0003] Silica may be added to the tread instead of carbon black or together with carbon black. By compounding silica, a tire with low rolling resistance can be obtained. The tire is excellent in low fuel consumption performance. Silica is a non-conductive substance. Tires with a tread containing silica are less conductive. Static electricity tends to be charged in vehicles equipped with such tires. Static electricity causes radio noise. In addition, static electricity can cause discomfort to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C19/08B60C11/00
CPCY02T10/86
Inventor 宫崎真一
Owner SUMITOMO RUBBER IND LTD
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