Pneumatic tire and manufacturing method therefor
a pneumatic tire and manufacturing method technology, applied in the field of pneumatic tires, can solve the problems of difficult to keep the noise reduction effect over an extended period, complex operation of erecting the folded portions and thermally fusing the thin films, and achieve the effect of convenient foaming
Inactive Publication Date: 2013-08-29
THE YOKOHAMA RUBBER CO LTD
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0008]An object of the present invention is to provide a pneumatic tire and a manufacturing method therefor which allow a reduction in a cavity resonance sound without complicated manufacturing steps.
Problems solved by technology
A cavity resonance phenomenon that occurs in a cavity portion formed between a pneumatic tire and a rim of a wheel has been a major cause of tire noises.
As a result, this technique has a durability problem and also has a problem that it is difficult to keep the noise-reducing effect over an extended period.
However, the operation of erecting the folded portions and the operation of thermally fusing the thin films are complicated.
These techniques have not been practically adopted yet.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
examples
[0050]Tires prepared for Examples 1 to 5 were pneumatic tires having the following structures. Specifically, each tire had a tire size of 235 / 50R17, and included: a carcass layer bridged between a pair of bead portions; and an inner liner layer disposed at a tire inner surface side of the carcass layer, the inner liner layer being made of a thermoplastic resin. The inner liner layer had a laminated structure including two kinds of film layers (a higher-melting-point film layer and a lower-melting-point film layer) having different melting points of the thermoplastic resin from each other. The lower-melting-point film layer was foamed to form multiple convex portions in the tire inner surface. For comparison, a tire including an inner liner layer made of a butyl rubber was prepared (Conventional Example).
[0051]The tires of Examples 1 to 5 had the maximum height of the convex portion, the melting point of the higher-melting-point film layer, the melting point of the lower-melting-poin...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| melting point | aaaaa | aaaaa |
| melting point | aaaaa | aaaaa |
| frequency | aaaaa | aaaaa |
Login to View More
Abstract
Provided is a pneumatic tire and a manufacturing method therefor which allow a reduction in a cavity resonance sound without complicated manufacturing steps. A pneumatic tire of the present invention includes: a pair of bead portions; a carcass layer bridged between the pair of bead portions; and an inner liner layer disposed at a tire inner surface side of the carcass layer, the inner liner layer being made of a thermoplastic resin or a thermoplastic elastomer composition obtained by blending a thermoplastic resin with an elastomer. The inner liner layer has a laminated structure including multiple film layers having different melting points of the thermoplastic resin from each other. The film layer having the lowest melting point of the thermoplastic resin is foamed to form multiple convex portions in the tire inner surface.
Description
RELATED APPLICATIONS[0001]This application is a Divisional of co-pending application Ser. No. 12 / 636,251, filed on Dec. 11, 2009, and for which priority is claimed under 35 U.S.C. §120; and this application claims priority to JP 2008-318579 filed Dec. 15, 2008; the entire contents of all are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a pneumatic tire and a manufacturing method therefor, the pneumatic tire including: a carcass layer bridged between a pair of bead portions; and an inner liner layer disposed at a tire inner surface side of the carcass layer, the inner liner layer being made of a thermoplastic resin or a thermoplastic elastomer composition obtained by blending a thermoplastic resin with an elastomer. More particularly, the present invention relates to a pneumatic tire and a manufacturing method therefor which allow a reduction in a cavity resonance sound without complicated manufactur...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(United States)
IPC IPC(8): B29D30/08
CPCB29D30/0681B29D2030/0682B60C5/14Y10T152/10054B60C2005/145B29D30/08B60C19/002
Inventor MATSUNAGA, FUTOSHI
Owner THE YOKOHAMA RUBBER CO LTD