JP6699791B1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
- Publication number
- JP6699791B1 JP6699791B1 JP2019177071A JP2019177071A JP6699791B1 JP 6699791 B1 JP6699791 B1 JP 6699791B1 JP 2019177071 A JP2019177071 A JP 2019177071A JP 2019177071 A JP2019177071 A JP 2019177071A JP 6699791 B1 JP6699791 B1 JP 6699791B1
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- Prior art keywords
- groove
- tire
- mass
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- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- JTTSZDBCLAKKAY-UHFFFAOYSA-N trimethoxy-[3-(3-trimethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CO[Si](OC)(OC)CCCSSSSCCC[Si](OC)(OC)OC JTTSZDBCLAKKAY-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- BNBXBRPOAJZBNB-UHFFFAOYSA-N trimethoxy-[4-(4-trimethoxysilylbutyldisulfanyl)butyl]silane Chemical compound CO[Si](OC)(OC)CCCCSSCCCC[Si](OC)(OC)OC BNBXBRPOAJZBNB-UHFFFAOYSA-N 0.000 description 1
- GSZUEPNJCPXEGU-UHFFFAOYSA-N trimethoxy-[4-(4-trimethoxysilylbutyltrisulfanyl)butyl]silane Chemical compound CO[Si](OC)(OC)CCCCSSSCCCC[Si](OC)(OC)OC GSZUEPNJCPXEGU-UHFFFAOYSA-N 0.000 description 1
- LQBHRPIAMBRGHZ-UHFFFAOYSA-N trimethyl(3-tripropoxysilylpropylsulfanyl)silane Chemical compound CCCO[Si](OCCC)(OCCC)CCCS[Si](C)(C)C LQBHRPIAMBRGHZ-UHFFFAOYSA-N 0.000 description 1
- OCOGNADUEMUKHC-UHFFFAOYSA-N trimethyl-[3-[methyl(dipropoxy)silyl]propylsulfanyl]silane Chemical compound CCCO[Si](C)(OCCC)CCCS[Si](C)(C)C OCOGNADUEMUKHC-UHFFFAOYSA-N 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 239000002383 tung oil Substances 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000019871 vegetable fat Nutrition 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 125000002256 xylenyl group Chemical class C1(C(C=CC=C1)C)(C)* 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- 150000007934 α,β-unsaturated carboxylic acids Chemical class 0.000 description 1
Images
Classifications
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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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
-
- 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
- B60C3/00—Tyres characterised by the transverse section
- B60C3/04—Tyres characterised by the transverse section characterised by the relative dimensions of the section, e.g. low profile
-
- 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
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1259—Depth of the sipe
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1272—Width of the sipe
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/0008—Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the tread rubber
- B60C2011/0016—Physical properties or dimensions
- B60C2011/0025—Modulus or tan delta
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0344—Circumferential grooves provided at the equatorial plane
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0353—Circumferential grooves characterised by width
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0355—Circumferential grooves characterised by depth
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/0365—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by width
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0381—Blind or isolated grooves
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C2011/1209—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe straight at the tread surface
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
〔1〕本発明の空気入りタイヤは、トレッド部を備える空気入りタイヤであって、前記トレッド部は、タイヤの周方向に連続して延びる2つ以上の周方向主溝と、幅方向溝と、サイプとを有し、車両装着時に最外側に位置する周方向主溝は、溝底の溝深さを100%としたときの溝深さ90%位置における溝幅W1とトレッド部表面における溝幅W2との比W1/W2が0.30〜0.75であり、タイヤの周方向の長さLaと、前記幅方向溝のタイヤの幅方向のエッジ成分の長さの合計Lb1とサイプの前記幅方向のエッジ成分の長さの合計Lb2の総和Lbとの比La/Lbが、0.10〜0.20であり、前記トレッド部を形成するゴム組成物は、5℃tanδが0.10〜0.60、|20℃tanδ−50℃tanδ|が0.10以下、20℃E’が5.0MPa以上である、空気入りタイヤ、
〔2〕前記トレッド部を形成するゴム組成物は、5℃tanδが0.20〜0.50、|20℃tanδ−50℃tanδ|が0.06以下、20℃E’が8.0MPa以上である、〔1〕に記載の空気入りタイヤ、
〔3〕前記車両装着時に最外側に位置する周方向主溝は、前記溝深さ90%位置における溝幅W1とトレッド部表面における溝幅W2との比W1/W2が0.30〜0.60である、〔1〕又は〔2〕に記載の空気入りタイヤ、
〔4〕前記タイヤの周方向の長さLaと、前記幅方向溝の前記幅方向のエッジ成分の長さの合計Lb1及び前記サイプの前記幅方向のエッジ成分の長さの合計Lb2の総和Lbとの比La/Lbが、0.13〜0.17である、〔1〕〜〔3〕のいずれか1つに記載の空気入りタイヤ、
〔5〕前記タイヤの周方向の長さLaと、前記幅方向溝の前記幅方向のエッジ成分の長さの合計Lb1との比La/Lb1が、0.20〜0.40である、〔1〕〜〔4〕のいずれか1つに記載の空気入りタイヤ、
〔6〕前記トレッド部は、前記幅方向で、前記周方向主溝によって仕切られた、一対のショルダー陸部及び前記一対のショルダー陸部の間に位置するセンター陸部を有し、前記ショルダー陸部における前記幅方向溝の前記幅方向のエッジ成分の長さの合計Lbsh1及び前記ショルダー陸部における前記サイプの前記幅方向のエッジ成分の長さの合計Lbsh2の総和Lbshと、前記センター陸部における前記幅方向溝の前記幅方向のエッジ成分の長さの合計Lbce1及び前記センター陸部における前記サイプの前記幅方向のエッジ成分の長さの合計Lbce2の総和Lbceとの比Lbsh/Lbceが、Lbsh/Lbce<1である、〔1〕〜〔5〕のいずれか1つに記載の空気入りタイヤ、
〔7〕前記トレッド部は、前記幅方向で、前記周方向主溝によって仕切られた、一対のショルダー陸部及び前記一対のショルダー陸部の間に位置するセンター陸部を有し、前記センター陸部はサイプを有し、前記センター陸部のサイプは、前記センター陸部の前記幅方向での両縁部を結ぶように延びており、前記センター陸部のサイプの前記幅方向の両端を結ぶ直線と、前記周方向主溝とがなす角θが60〜80度の範囲である、〔1〕〜〔6〕のいずれか1つに記載の空気入りタイヤ、
〔8〕タイヤ断面幅をWt(mm)、外径をDt(mm)としたとき、タイヤ断面幅Wt及び外径Dtが、以下の式、59.078×Wt^0.460≦Dtを満たし、トレッドゴムの30℃における動的貯蔵弾性率E’が、5.0〜15.0MPaである、〔1〕〜〔7〕のいずれか1つに記載の空気入りタイヤ、ならびに
〔9〕前記タイヤが乗用車用タイヤである、〔1〕〜〔8〕のいずれか1つに記載の空気入りタイヤ
に関する。
本実施形態のタイヤは、トレッド部を形成するゴム組成物は、5℃tanδが0.10〜0.60、好ましくは0.20〜0.50であり、|20℃tanδ−50℃tanδ|が0.10以下、好ましくは0.06以下であり、かつ、20℃E’(20℃における動的貯蔵弾性率)が5.0MPa以上、20MPa以下、好ましくは8.0MPa以上、16MPa以下である。本発明は、前述したタイヤの構造、特にトレッドの形状と、ゴム組成物の物性とが協働することにより、ドライ路面及びウェット路面での操縦安定性能の総合性能向上を可能にしている。このようなタイヤ用ゴム組成物は、ゴム成分とその他の成分とからなるものとして、常法により得ることができる。タイヤ用ゴム組成物は、ゴム成分とその他の成分とからなる。
以下に、実施例で用いた各種薬品について説明する。
イソプレン系ゴム:TSR20(天然ゴム)
SBR1:JSR1502(E−SBR、スチレン量:23.5質量%、非油展、JSR(株)から入手可能)
SBR2:JSR1723(E−SBR、スチレン量:23.5質量%、ゴム成分100質量部に対しオイル分37.5質量部を含む油展ゴム、JSR(株)から入手可能)
SBR3:タフデン4850(S−SBR、スチレン量:40質量%、ゴム成分100質量部に対しオイル分50質量部を含む油展ゴム、旭化成(株)から入手可能)
SBR4:後述の製造例1で製造した変性SBR(S−SBR、スチレン量:35質量%、ビニル量:45モル%、重量平均分子量:30万、ゴム成分100質量部に対しオイル分20質量部を含む油展ゴム)
SBR5:SLR6430(S−SBR、スチレン量:40質量%、ビニル量:24モル%、ゴム成分100質量部に対しオイル分37.5質量部を含む油展ゴム、トリンセオ社から入手可能)
SBR6:後述の製造例2で製造した変性SBR(S−SBR、スチレン量:25質量%、ビニル量:60モル%、重量平均分子量:20万、非油展)
SBR7:後述の製造例3で製造した変性SBR(S−SBR、スチレン量:35質量%、ビニル量:50モル%、重量平均分子量:60万、ゴム成分100質量部に対しオイル分25質量部を含む油展ゴム)
BR:BR150B(シス含量:97質量%、宇部興産(株)から入手可能)
カーボンブラック:ダイアブラック(登録商標)N220(N2SA:115m2/g、三菱ケミカル(株)から入手可能)
シリカ1:ゼオシール1115MP(N2SA:115m2/g、ソルベイジャパン(株)から入手可能)
シリカ2:ウルトラシルVN3(N2SA:175m2/g、エボニック・デグッサ社から入手可能)
シランカップリング剤:Si266(ビス(3−トリエトキシシリルプロピル)ジスルフィド、エボニック・デグッサ社から入手可能)
オイル1:Vivatec500(TDAEオイル、H&R社から入手可能)
樹脂:YSレジンTO125(テルペン樹脂、軟化点:125℃、ヤスハラケミカル(株)から入手可能)
ワックス:オゾエース0355(パラフィンワックス、日本精蝋(株)から入手可能)
老化防止剤1:アンチゲン6C(N−フェニル−N’−(1,3−ジメチルブチル)−p−フェニレンジアミン、住友化学(株)から入手可能)
老化防止剤2:アンテージRD(2,2,4−トリメチル−1,2−ジヒドロキノリン重合体、川口化学工業(株)から入手可能)
加工助剤:EF44(脂肪酸亜鉛塩、ストラクトール社から入手可能)
ステアリン酸:日油(株)製のステアリン酸「椿」
酸化亜鉛:三井金属鉱業(株)製の亜鉛華1号
硫黄:鶴見化学(株)製の粉末硫黄
加硫促進剤1:ノクセラーCZ(CBS、N−シクロヘキシル−2−ベンゾチアゾールスルフェンアミド、大内新興化学工業(株)から入手可能)
加硫促進剤2:ノクセラーD(DPG、1,3−ジフェニルグアニジン、大内新興化学工業(株)から入手可能)
窒素置換されたオートクレーブ反応器に、シクロヘキサン、テトラヒドロフラン、スチレン、及び1,3−ブタジエンを仕込んだ。反応器の内容物の温度を20℃に調整した後、n−ブチルリチウムを添加して重合を開始した。断熱条件で重合し、最高温度は85℃に達した。重合転化率が99%に達した時点で1,3−ブタジエンを追加し、更に5分重合させた後、N,N−ビス(トリメチルシリル)−3−アミノプロピルトリメトキシシランを変性剤として加えて反応を行った。重合反応終了後、2,6−ジ−tert−ブチル−p−クレゾールを添加した。次いで、重合体100質量部に対し伸展油を20質量部加えた後、スチームストリッピングにより脱溶媒を行い、110℃に調温された熱ロールにより乾燥した後、SBR4を得た。スチレン量は35質量%、ビニル量は45%、重量平均分子量は30万であった。
下記所定のSBRを得るように、原料の比率、その他反応条件を調節したこと、及び、伸展油を加えなかったこと以外は、製造例1と同様に処理して、SBR6を得た。スチレン量は25質量%、ビニル量は60%、重量平均分子量は20万であった。
下記所定のSBRを得るように、原料の比率、その他反応条件を調節したこと、及び、伸展油を25質量部としたこと以外は、製造例1と同様に処理して、SBR7を得た。スチレン量は35質量%、ビニル量は50%、重量平均分子量は60万であった。
<操縦安定性>
排気量2000ccのFF乗用車の四輪に、試験用タイヤが装着され、ドライバー1名乗車で、ドライ路面及びウェット路面上を旋回走行させ、そのときの周回タイムを評価した。結果は、比較例1の周回タイム/各例の周回タイム×100とする評点である。数値が大きい程、ドライ路面での操縦安定性、又はウェット路面での操縦安定性を有していることを示す。なお、表2及び表3における「総合評価」は、「操縦安定性能(ドライ路面)」の点数と、「操縦安定性能(ウェット路面)」の点数の合計点数である。
テストの結果が表2及び表3に示される。
11、12、13 周方向溝(周方向主溝)
16 外側ショルダー陸部
17 内側ショルダー陸部
18 外側センター陸部
19 内側センター陸部
2 トレッド部
21 外側ショルダー幅方向溝
22 内側ショルダー幅方向溝
23 外側ショルダーサイプ
24 内側ショルダーサイプ
25 外側センター幅方向溝
26 内側センター幅方向溝
27 外側センターサイプ
28 内側センターサイプ
3 サイドウォール部
4 ビード部
5 ビードコア
6 カーカス
6A カーカスプライ
7 ベルト層
7A、7B ベルトプライ
C タイヤ周方向
To 外側トレッド端
Ti 内側トレッド端
TW トレッド幅
W タイヤ幅方向
Claims (9)
- トレッド部を備える空気入りタイヤであって、
前記トレッド部は、タイヤの周方向に連続して延びる2つ以上の周方向主溝と、幅方向溝と、サイプとを有し、
車両装着時に最外側に位置する周方向主溝は、溝底の溝深さを100%としたときの溝深さ90%位置における溝幅W1とトレッド部表面における溝幅W2との比W1/W2が0.30〜0.75であり、
タイヤの周方向の長さLaと、前記幅方向溝のタイヤの幅方向のエッジ成分の長さの合計Lb1とサイプの前記幅方向のエッジ成分の長さの合計Lb2の総和Lbとの比La/Lbが、0.10〜0.20であり、
前記トレッド部を形成するゴム組成物は、5℃tanδが0.10〜0.60、|20℃tanδ−50℃tanδ|が0.10以下、20℃E’が5.0MPa以上である、空気入りタイヤ。 - 前記トレッド部を形成するゴム組成物は、5℃tanδが0.20〜0.50、|20℃tanδ−50℃tanδ|が0.06以下、20℃E’が8.0MPa以上である、請求項1に記載の空気入りタイヤ。
- 前記車両装着時に最外側に位置する周方向主溝は、前記溝深さ90%位置における溝幅W1とトレッド部表面における溝幅W2との比W1/W2が0.30〜0.60である、請求項1又は2に記載の空気入りタイヤ。
- 前記タイヤの周方向の長さLaと、前記幅方向溝の前記幅方向のエッジ成分の長さの合計Lb1及び前記サイプの前記幅方向のエッジ成分の長さの合計Lb2の総和Lbとの比La/Lbが、0.13〜0.17である、請求項1〜3のいずれか1項に記載の空気入りタイヤ。
- 前記タイヤの周方向の長さLaと、前記幅方向溝の前記幅方向のエッジ成分の長さの合計Lb1との比La/Lb1が、0.20〜0.40である、請求項1〜4のいずれか1項に記載の空気入りタイヤ。
- 前記トレッド部は、前記幅方向で、前記周方向主溝によって仕切られた、一対のショルダー陸部及び前記一対のショルダー陸部の間に位置するセンター陸部を有し、
前記ショルダー陸部における前記幅方向溝の前記幅方向のエッジ成分の長さの合計Lbsh1及び前記ショルダー陸部における前記サイプの前記幅方向のエッジ成分の長さの合計Lbsh2の総和Lbshと、
前記センター陸部における前記幅方向溝の前記幅方向のエッジ成分の長さの合計Lbce1及び前記センター陸部における前記サイプの前記幅方向のエッジ成分の長さの合計Lbce2の総和Lbceとの比Lbsh/Lbceが、Lbsh/Lbce<1である、請求項1〜5のいずれか1項に記載の空気入りタイヤ。 - 前記トレッド部は、前記幅方向で、前記周方向主溝によって仕切られた、一対のショルダー陸部及び前記一対のショルダー陸部の間に位置するセンター陸部を有し、
前記センター陸部はサイプを有し、前記センター陸部のサイプは、前記センター陸部の前記幅方向での両縁部を結ぶように延びており、前記センター陸部のサイプの前記幅方向の両端を結ぶ直線と、前記周方向主溝とがなす角θが60〜80度の範囲である、請求項1〜6のいずれか1項に記載の空気入りタイヤ。 - タイヤ断面幅をWt(mm)、外径をDt(mm)としたとき、タイヤ断面幅Wt及び外径Dtが、以下の式、
59.078×Wt^0.460≦Dt
を満たし、
トレッドゴムの30℃における動的貯蔵弾性率E’が、5.0〜15.0MPaである、請求項1〜7のいずれか1項に記載の空気入りタイヤ。 - 前記タイヤが乗用車用タイヤである、請求項1〜8のいずれか1項に記載の空気入りタイヤ。
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PCT/JP2020/032438 WO2021059853A1 (ja) | 2019-09-27 | 2020-08-27 | 空気入りタイヤ |
CN202080065617.5A CN114514125A (zh) | 2019-09-27 | 2020-08-27 | 充气轮胎 |
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US20230373247A1 (en) * | 2020-10-14 | 2023-11-23 | Sumitomo Rubber Industries, Ltd. | Tire |
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US20230364944A1 (en) * | 2020-10-07 | 2023-11-16 | Sumitomo Rubber Industries, Ltd. | Tire |
US20230373247A1 (en) * | 2020-10-14 | 2023-11-23 | Sumitomo Rubber Industries, Ltd. | Tire |
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