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Film, inner liner for tire, and tire using the inner liner

An auxiliary layer and resin composition technology, applied in the direction of pneumatic tires, special tires, tire parts, etc., can solve the problems of insufficient bending resistance and softness, easy fracture of the inner liner, and inability to display gas barrier properties, etc., to achieve Effect of good gas barrier property, excellent gas barrier property and bending resistance, internal pressure retention improvement

Active Publication Date: 2011-05-04
BRIDGESTONE CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technique of JP11-199713 raises the problem that although the bending resistance is improved, the good gas barrier properties possessed by nylon resin cannot be maintained due to the relatively high ratio of the elastomer to the resin
[0008] However, the inner liner disclosed in JP2004-176048 is easily broken and cannot exhibit good gas barrier properties because of insufficient bending resistance and softness under relatively low-temperature running conditions such as winter time, so there are still improvements. space

Method used

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  • Film, inner liner for tire, and tire using the inner liner
  • Film, inner liner for tire, and tire using the inner liner
  • Film, inner liner for tire, and tire using the inner liner

Examples

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Embodiment

[0094] The present invention will be described in further detail by the following examples. The present invention is not limited by these examples, and can be appropriately changed within the scope not departing from the spirit of the present invention.

Synthetic example 1

[0096] 2 parts by mass of an ethylene-vinyl alcohol copolymer having an ethylene content: 44 mol% and a degree of saponification: 99.9% (MFR at 190° C. under a load of 2160 g: 5.5 g / 10 minutes) was charged into a pressurized reaction tank and 8 parts by mass of N-methyl-2-pyrrolidone, and the mixture was heated and stirred at 120° C. for 2 hours to completely dissolve the ethylene-vinyl alcohol copolymer. Next, 0.4 parts by mass of propylene oxide was added to the mixture as the epoxy compound (E), and the resulting reaction mixture was heated at 160° C. for 4 hours. After the heating was completed, the mixture was poured into 100 parts by mass of distilled water to settle. The resulting precipitate was sufficiently washed with a large amount of distilled water to wash off N-methyl-2-pyrrolidone and unreacted propylene oxide, whereby a modified ethylene-vinyl alcohol copolymer was obtained. The modified ethylene-vinyl alcohol copolymer thus obtained is pulverized by a pulveri...

Synthetic example 2

[0098] By using the "TEM-35BS" extruder (37mmΦ, L / D=52.5, manufactured by Toshiba Machine Co., Ltd.), the screw structure, vent hole, and pressure (dydroforming) inlet are as follows Figure 5settings shown in . The extruder was operated at a screw rotation number of 400 rpm with barrel C1 water cooled and barrels C2-C3 and barrels C4-C15 heated at 200°C and 240°C, respectively. Resin was supplied at a rate of 15 kg / hour from the resin base port of C1. After the supplied EVOH was melted, water and oxygen were removed from the vent hole 1, and glycidol was supplied from the hydroreforming inlet of C9 at a rate of 2.5 kg / hour (supply pressure: 6 MPa), thereby obtaining glycidol-modified EVOH .

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Abstract

Disclosed is a film that has excellent gas barrier properties and flex resistance, can reduce the weight of a tire while improving the internal pressure retention in a new tire or a tire after traveling, and can exhibit barrier properties without cracking in traveling at a low temperature, for example, in a winter season. Also disclosed are an inner liner for a tire using the film, and a tire comprising the inner liner for a tire. The film is characterized by comprising at least a layer formed of a resin composition (D) comprising a viscoelastic material (C) dispersed in a resin comprising a modified ethylene-vinyl alcohol copolymer (B) produced by reacting an ethylene-vinyl alcohol copolymer (A), the viscoelastic material (C) having a 100% modulus at -30 DEG C of less than 6 MPa.

Description

technical field [0001] The present invention relates to a film applicable to an inner liner for a tire, which film has excellent gas barrier properties and bending resistance, enables reduction in tire weight while improving internal pressure retention of the tire in its new stage and after use stage, and In particular, good gas barrier properties can be exhibited without breaking under relatively low-temperature running conditions such as winter time. Background technique [0002] Generally, a rubber component mainly composed of butyl rubber, halogenated butyl rubber, etc. is used for an inner liner provided as an air barrier layer in the inner surface of a tire to maintain the inner pressure of the tire. In the case of using such a rubber composition using butyl-based rubber as a main component as described above for the inner liner, since the rubber composition has relatively poor air barrier properties, it is necessary to set the thickness of the inner liner at about 1m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04B60C5/14C08F8/08C08L23/26C08L101/12
CPCB60C1/0008B60C5/14B60C2005/145C08F8/02C08F216/06C08F2800/10C08F2810/10C08J3/28C08J5/18C08J2323/16C08J2323/26C08J2329/04C08L15/00C08L23/0861C08L23/16C08L23/26C08L29/04Y10T428/269Y10T428/31573Y10T428/31855Y10T428/3192Y10T428/31924C08L2666/06C08L2666/04C08F210/02
Inventor 高桥祐和野原大辅中川大助磯山晃太
Owner BRIDGESTONE CORP
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