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pneumatic tire

一种充气轮胎、轮胎的技术，应用在充气轮胎、特殊轮胎、轮胎零部件等方向，能够解决橡胶层与防透气层剥离等问题，达到滚动阻力降低、乘坐感觉优异的效果

Active Publication Date: 2017-07-04
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this structure, peeling may occur between the rubber layer of the carcass ply and the air permeation prevention layer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0077] figure 2 Among them, the lining layer 10 is composed of a first layer 11 and a second layer 12 . The inner liner 10 is provided toward the outer side in the tire radial direction so that the second layer 12 is in contact with the carcass ply 61 . By doing so, the bonding strength between the second layer 12 and the carcass ply 61 can be improved during the vulcanization process of the tire. The polymer laminate can use the polymer composition of the first layer and the polymer composition of the second layer according to figure 2 The sequence shown is obtained by lamination extrusion or co-extrusion equal build-up extrusion.

Embodiment approach 2

[0079] image 3 Among them, the inner liner 10 is composed of a first layer 11 , a second layer 12 and a rubber sheet layer 13 . The inner liner 10 is provided toward the outer side in the tire radial direction so that the rubber sheet layer 13 is in contact with the carcass ply 61 . Doing so can improve the bonding strength between the rubber sheet layer 13 and the carcass ply 61 during the vulcanization process of the tire.

[0080]

[0081] Pneumatic tires can be manufactured by general manufacturing methods. That is, it can be produced by applying the inner liner 10 to the inner liner of a green tire of the pneumatic tire 1 and vulcanizing and molding it together with other components. When disposing the inner liner 10 on the raw tire, the second layer 12 or the rubber sheet layer 13 of the polymer laminate 10 is disposed toward the outer side in the radial direction of the tire so as to be in contact with the carcass ply 6 . That is, the first layer 11 is disposed to...

Embodiment 1～5、 comparative example 1～7

[0087]

[0088] SIB, SIBS, and SIS used for the first layer and the second layer were prepared as follows.

[0089] (SIB)

[0090] Into a 2 L reaction vessel equipped with a stirrer, 589 mL of methylcyclohexane (dried over molecular sieves), 613 mL of n-butyl chloride (dried over molecular sieves), and 0.550 g of cumyl chloride were added. After cooling the reaction container to -70°C, 0.35 mL of α-picoline (2-picoline) and 179 mL of isobutene were added. Further, 9.4 mL of titanium tetrachloride was added to start polymerization, and the solution was reacted for 2.0 hours while stirring the solution at -70°C. Next, 59 mL of styrene was added to the reaction container, and after continuing the reaction for 60 minutes, a large amount of methanol was added to terminate the reaction. After removing the solvent and the like from the reaction solution, the polymer was dissolved in toluene and washed with water twice. This toluene solution was added to a methanol mixture to pre...

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Abstract

A pneumatic tire equipped with an inner liner on the inner side of the tire, including a first layer containing a first polymer composition and a second layer containing a second polymer composition, the polymer component of the first polymer composition containing 5 The polymer component in the second polymer composition contains at least 10 mass% to 85 mass% of SIS and SIB. Any one and 10% by mass or more and 90% by mass or less of the rubber component, the first layer is arranged on the inner side in the tire radial direction, and the inner liner layer is greater than the average thickness Gb of the bead area Rb extending from the maximum width position of the tire to the toe. , the average thickness Gs of the shoulder reinforcement area Rs extending from the maximum width position of the tire to the corresponding position Lu at the belt end is thinner.

Description

technical field [0001] The present invention relates to a pneumatic tire having an inner liner. Background technique [0002] In recent years, people are seeking to reduce the weight of tires due to the strong social demand for lower fuel consumption of automobiles. Among the tire components, weight reduction and the like are also being carried out for the inner liner layer, which is provided on the inner side in the radial direction of the tire and has the function of reducing the amount of leakage of air from the inside of the pneumatic tire (the amount of air flow) to the outside. [0003] Conventionally, as a rubber composition for an inner liner, a butyl-based rubber containing 70 to 100% by mass of butyl rubber and 30 to 0% by mass of natural rubber has been used to improve the air permeation resistance of the tire. In addition, butyl-based rubber contains about 1% by mass of isoprene in addition to butene, and it is combined with sulfur, a vulcanization accelerator, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C5/14C08L7/00C08L23/22C08L53/02
CPCB60C5/14C08L7/00C08L23/22C08L53/02B60C2005/145B60C1/0008
Inventor 增井友美杉本睦树
Owner SUMITOMO RUBBER IND LTD
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