JPWO2016136802A1 - 空気入りタイヤ - Google Patents
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- JPWO2016136802A1 JPWO2016136802A1 JP2017502420A JP2017502420A JPWO2016136802A1 JP WO2016136802 A1 JPWO2016136802 A1 JP WO2016136802A1 JP 2017502420 A JP2017502420 A JP 2017502420A JP 2017502420 A JP2017502420 A JP 2017502420A JP WO2016136802 A1 JPWO2016136802 A1 JP WO2016136802A1
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- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
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- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K3/04—Carbon
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- C08K5/00—Use of organic ingredients
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- C08K5/22—Compounds containing nitrogen bound to another nitrogen atom
- C08K5/23—Azo-compounds
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
- B60C2013/005—Physical properties of the sidewall rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
- B60C2013/005—Physical properties of the sidewall rubber
- B60C2013/006—Modulus; Hardness; Loss modulus or "tangens delta"
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- B60—VEHICLES IN GENERAL
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- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
- B60C13/04—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof having annular inlays or covers, e.g. white sidewalls
- B60C2013/045—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof having annular inlays or covers, e.g. white sidewalls comprising different sidewall rubber layers
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- C08J2201/00—Foams characterised by the foaming process
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Abstract
Description
表1に示すゴム配合からなる5種類のサイドウォール用ゴム組成物(配合A〜E)および4種類の発泡性ゴム組成物(配合F〜I)について、それぞれ硫黄、加硫促進剤および化学発泡剤を除く配合成分を秤量し、1.7L密閉式バンバリーミキサーで5分間混練し、温度150℃でマスターバッチを放出し室温冷却した。その後このマスターバッチを加熱ロールに供し、硫黄、加硫促進剤および化学発泡剤を加えて混合し、サイドウォール用ゴム組成物および発泡性ゴム組成物を調製した。
得られた加硫試験片をJIS K7244−4に準拠して、スペクトロメーター(東洋精機製作所社製)にかけて、歪み10%±10%、周波数20Hzおよび20℃の測定条件で、10%変形時の引張り応力を測定した。得られた結果を表1の「10%の引張り応力」の欄に記載する。
発泡ゴム成形体の密度を、JIS K−6268に準拠して20℃で測定した。発泡ゴムの場合、予め体積を測定しておいた鉄のおもりを2gつるして測定し、その値を引く事によって体積と重さを算出し、密度を計算した。得られた結果を表1の「密度」の欄に記載する。また空気入りタイヤの発泡ゴム層およびサイドゴム層からなるサイドウォール部の比重も同様にして測定し、得られた結果を表2の「サイドウォール部の比重」の欄に記載する。
発泡ゴム成形体のtanδを、東洋精機製作所社製粘弾性スペクトロメーターを用いて、歪み10%±2%、周波数20Hz、雰囲気温度20℃で測定した。得られた結果を表1の「tanδ(20℃)」の欄に記載する。
発泡ゴム成形体の熱伝導率をISO8301に準拠し、迅速熱伝導率計(京都電子工業社製QTM−500)を使用して、細線加熱法(ホットワイヤ法)で測定した。得られた結果を表1の「熱伝導率」の欄に記載する。
・NR:天然ゴム、TSR20
・BR:ブタジエンゴム、日本ゼオン社製Nipol BR1220
・カーボンブラック:FEF級カーボンブラック、中部カーボン社製HTC−100
・酸化亜鉛:正同化学工業社製酸化亜鉛3種
・ステアリン酸:日油社製ビーズステアリン酸YR
・老化防止剤:FLEXSYS社製SANTOFLEX 6PPD
・ワックス:パラフィンワックス
・オイル:アロマ系オイル、三共油化工業社製A−OMIX
・PP:ポリプロピレン、プライムポリマー社製E−333GV
・PS:ポリスチレン、東洋スチレン社製MW1C
・硫黄: 鶴見化学社製金華印微粉硫黄150mesh
・加硫促進剤:大内新興化学工業社製ノクセラーNS−P
・化学発泡剤:ニトロソ系発泡剤、永和化成工業社製セルラーCK#54
タイヤサイズを195/65R15、タイヤの基本構造を図1、サイドウォール部3を上記で得られたサイドウォール用ゴム組成物および発泡性ゴム組成物を積層して構成し、その平均厚さを表2のように異ならせるようにして、12種類の空気入りタイヤ(実施例1〜5、比較例1〜5、標準例1,2)をそれぞれ作製した。得られた12種類のタイヤについて、以下に記載する試験方法により、転がり抵抗及び耐外傷性の評価を行い、その結果を表2に示した。
各タイヤをリム(サイズ:15×6J)に組み込み、空気圧230kPaを充填して、室内のドラム試験機(ドラム径:1707mm)を使用し、JIS D4234に準拠し荷重4.5kN、速度80km/時の条件における転がり抵抗値を測定した。その結果を標準例1の転がり抵抗値の逆数を100とする指数として、表2の「転がり抵抗」の欄にに記載した。この指数が大きいほど転がり抵抗が低いことを意味する。
各タイヤをリム(サイズ:15×6J)に組み込み、排気量1800ccの車両に装着し、前輪タイヤを、高さ20cmのコンクリート製縁石に5°の侵入角度で衝突させたとき、サイドウォール部が傷つく最低速度を計測した。その結果を標準例1の値を100とする指数として、表2の「耐外傷性」の欄に記載した。この指数が大きいほど耐外傷性が優れていることを意味する。
2 ビード部
3 サイドウォール部
4 トレッド部
5 カーカス層
6 発泡ゴム層
7 サイドゴム層
Claims (7)
- 左右一対のビード部と、該ビード部に連なるサイドウォール部と、該サイドウォール部を連結するトレッド部とを備え、左右のビード部間にカーカス層を装架した空気入りタイヤにおいて、
前記サイドウォール部におけるカーカス層の外側に発泡ゴム層、該発泡ゴム層の外側にサイドゴム層を配置するとともに、前記発泡ゴム層の密度が0.5〜0.9g/cm3、かつ20℃のtanδが0.17以下であり、前記サイドゴム層を形成するサイドウォール用ゴム組成物がジエン系ゴム100重量部に、熱可塑性樹脂1〜20重量部、カーボンブラック10〜65重量部を配合したことを特徴とする空気入りタイヤ。 - 前記熱可塑性樹脂が、ポリスチレン、ポリプロピレンから選ばれることを特徴とする請求項1に記載の空気入りタイヤ。
- 前記発泡ゴム層の体積とサイドゴム層の体積の比(発泡ゴム層/サイドゴム層)が、1/1〜10/1であることを特徴とする請求項1または2に記載の空気入りタイヤ。
- 前記サイドウォール用ゴム組成物が、ジエン系ゴム100重量%中、天然ゴムが30〜70重量%、ブタジエンゴムおよび/またはスチレンブタジエンゴムが70〜30重量%であることを特徴とする請求項1〜3のいずれかに記載の空気入りタイヤ。
- 前記発泡ゴム層の熱伝導率が0.05〜0.2W/mKであることを特徴とする請求項1〜4のいずれかに記載の空気入りタイヤ。
- 前記発泡ゴム層を構成する発泡性ゴム組成物が、ニトロソ系発泡剤および/またはアゾ系発泡剤を含むことを特徴とする請求項1〜5のいずれかに記載の空気入りタイヤ。
- 前記発泡ゴム層を構成する発泡性ゴム組成物が、ジエン系ゴム100重量部に対し、尿素を0.1〜20重量部配合したことを特徴とする請求項1〜6のいずれかに記載の空気入りタイヤ。
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JP2015037566 | 2015-02-27 | ||
JP2015037566 | 2015-02-27 | ||
PCT/JP2016/055415 WO2016136802A1 (ja) | 2015-02-27 | 2016-02-24 | 空気入りタイヤ |
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JPWO2016136802A1 true JPWO2016136802A1 (ja) | 2017-09-21 |
JP6372610B2 JP6372610B2 (ja) | 2018-08-15 |
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JP (1) | JP6372610B2 (ja) |
CN (1) | CN107207787A (ja) |
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FR3123589B1 (fr) * | 2021-06-07 | 2023-06-09 | Michelin & Cie | Pneumatique avec des performances optimisées en résistance au roulement sans dégrader la performance industrielle |
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JPS62256636A (ja) * | 1986-04-30 | 1987-11-09 | Kanegafuchi Chem Ind Co Ltd | 車輌バンパ−用芯材の製造方法及び製造用金型 |
JPH0692112A (ja) * | 1992-09-14 | 1994-04-05 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
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WO2011152188A1 (ja) * | 2010-06-04 | 2011-12-08 | 横浜ゴム株式会社 | 空気入りタイヤ |
JP2013163419A (ja) * | 2012-02-09 | 2013-08-22 | Bridgestone Corp | 空気入りタイヤ |
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JPH07122005B2 (ja) * | 1987-04-15 | 1995-12-25 | 株式会社ブリヂストン | ゴム組成物 |
JPH06211007A (ja) * | 1993-01-14 | 1994-08-02 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
US6646066B2 (en) * | 2002-03-14 | 2003-11-11 | The Goodyear Tire & Rubber Company | Rubber composition containing a thermoplastic polymer and tire sidewall component or tire support ring comprised of such rubber composition |
JP2010125891A (ja) * | 2008-11-25 | 2010-06-10 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
WO2011118338A1 (ja) * | 2010-03-25 | 2011-09-29 | シチズンホールディングス株式会社 | 工作機械 |
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2016
- 2016-02-24 WO PCT/JP2016/055415 patent/WO2016136802A1/ja active Application Filing
- 2016-02-24 JP JP2017502420A patent/JP6372610B2/ja active Active
- 2016-02-24 US US15/553,962 patent/US20180244112A1/en not_active Abandoned
- 2016-02-24 CN CN201680006124.8A patent/CN107207787A/zh active Pending
- 2016-02-24 DE DE112016000956.9T patent/DE112016000956T9/de not_active Expired - Fee Related
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JPS62256636A (ja) * | 1986-04-30 | 1987-11-09 | Kanegafuchi Chem Ind Co Ltd | 車輌バンパ−用芯材の製造方法及び製造用金型 |
JPH0692112A (ja) * | 1992-09-14 | 1994-04-05 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JPH1087900A (ja) * | 1996-09-10 | 1998-04-07 | Yokohama Rubber Co Ltd:The | ゴム組成物 |
WO2011152188A1 (ja) * | 2010-06-04 | 2011-12-08 | 横浜ゴム株式会社 | 空気入りタイヤ |
JP2013163419A (ja) * | 2012-02-09 | 2013-08-22 | Bridgestone Corp | 空気入りタイヤ |
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US20180244112A1 (en) | 2018-08-30 |
JP6372610B2 (ja) | 2018-08-15 |
DE112016000956T5 (de) | 2017-11-16 |
WO2016136802A1 (ja) | 2016-09-01 |
DE112016000956T9 (de) | 2018-01-18 |
CN107207787A (zh) | 2017-09-26 |
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