Pneumatic tyre
A technology for pneumatic tires and treads, which is applied to pneumatic tires, tire parts, and no separate inflatable pads, etc., which can solve the problems of high inner liner tanδ, increased weight, and deterioration of tire rolling resistance, and achieve air retention performance improvement Effect
Inactive Publication Date: 2015-07-01
SUMITOMO RUBBER IND LTD
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- Description
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- Application Information
AI Technical Summary
Problems solved by technology
[0008] However, when the thickness of the butyl rubber layer is increased, the weight of the tire increases and the rolling resistance of the tire may deteriorate.
In addition, the volume of the lining will increase, which may lead to higher costs
[0009] In addition, when the ratio of butyl rubber in the butyl rubber composition is increased, the tan δ of the inner liner increases, and the rolling resistance of the tire may deteriorate.
In addition, the cost may increase
Method used
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Examples
Experimental program
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Effect test
experiment example
[0038] 1. First experiment
[0039] As a first experiment, in a tire manufactured using an inner liner in which only a butyl rubber layer is formed in the central portion, the air retention performance, etc. effect experiment.
[0040] (1) Preparation of test tires
[0041] A butyl rubber layer (thickness: 0.8 mm) and a tie rubber layer (thickness: 0.5 mm) are composed of butyl compound shown in Table 1 and Table 2, and the central part is as shown in Table 1 and Table 2. The inner liner obtained by removing the bonding rubber layer was placed under the breaker layer with a width of 110 mm, and tires with a size of 155 / 65R13 were produced by the same manufacturing method as in the past, as test tires of Experimental Examples 1 to 12.
[0042] In addition, in Table 1 and Table 2, "the width of the adhesive layer removed" means the width of the central area where the adhesive layer is removed, that is, the width of the central area with only the butyl rubber layer. In additio...
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Abstract
The present invention provides a pneumatic tire. The pneumatic tire will not be increased in weight, will not be enhanced in the rolling resistance of the tire to deteriorate due to increase of tan [sigma], and will not rise in costs, while the air in the pneumatic tire to maintain performanceIt is still higher than that in the prior art. The pneumatic tire includes: a liner, a buffer layer which is arranged on the outside of the liner, and a tread which is disposed on the outer side of the buffer layer. The inner liner is formed from a butyl rubber layer, and a subbing layer combination, which is provided in the region removed at the widthwise central portion of the tread of the butyl rubber layer in the outer side for. The thickness of the inner liner of a pneumatic tire butyl rubber layer is 0.8-1.6mm, the thickness of the combined rubber layer at the lining layer 0.4-1.2mm. Further, the leading end portion of the liner is cut both end portions for being connected at 30 to 45 degrees of shear angle.
Description
technical field [0001] The present invention relates to a pneumatic tire having an inner liner excellent in air retention performance. Background technique [0002] Pneumatic tires are generally configured such that an inner liner, a carcass ply, a carcass ply (breaker layer) and other carcass materials, and tread rubber are arranged from the inside to the outside (for example, Patent Documents 1 and 2). [0003] Here, the inner liner is provided for air retention performance, that is, to suppress permeation of air filled in the tire, and the butyl rubber layer formed using a butyl rubber-based composition excellent in air retention performance plays this role. However, the adhesion between the butyl rubber layer and the carcass material attached to the inner liner cannot be said to be sufficient, so a tie rubber layer formed using an NR-based rubber composition is also provided on the butyl rubber layer. to form the inner lining. [0004] Patent Document 1: Japanese Paten...
Claims
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Login to View More IPC IPC(8): B60C5/00B60C5/14
CPCB60C2005/147
Inventor 工藤大介
Owner SUMITOMO RUBBER IND LTD