JP2018001749A - タイヤの製造方法 - Google Patents
タイヤの製造方法 Download PDFInfo
- Publication number
- JP2018001749A JP2018001749A JP2017107042A JP2017107042A JP2018001749A JP 2018001749 A JP2018001749 A JP 2018001749A JP 2017107042 A JP2017107042 A JP 2017107042A JP 2017107042 A JP2017107042 A JP 2017107042A JP 2018001749 A JP2018001749 A JP 2018001749A
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- Prior art keywords
- resin
- filament
- tire
- steel
- steel cord
- Prior art date
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- Granted
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Images
Classifications
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- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Tires In General (AREA)
- Ropes Or Cables (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
【解決手段】少なくとも1枚のベルト層からなるベルトを備えた生タイヤを加硫する加硫工程を有するタイヤの製造方法であり、ベルト層が、スチールフィラメント2と軟化点が125℃以下の樹脂フィラメント1とが撚り合わされてなるスチールコード10を有し、かつ、少なくともアイオノマーを含む。
【選択図】図1
Description
前記ベルト層が、スチールフィラメントと軟化点が125℃以下の樹脂フィラメントとが撚り合わされてなるスチールコードを有し、かつ、前記樹脂フィラメントが、少なくともアイオノマーを含むことを特徴とするものである。ここで、軟化点とは、JIS K 7206(1999)に記載されている軟化点試験方法を用いて測定された値をいう。なお、本発明の製造方法においては、樹脂とは、熱可塑性エラストマーを含めた熱可塑性樹脂および熱硬化性エラストマーを含めた熱硬化性樹脂を含む概念であり、加硫ゴムは含まない。
本発明の製造方法は、少なくとも1枚のベルト層からなるベルトを備えた生タイヤを加硫する加硫工程を有する。本発明の製造方法においては、ベルト層は、スチールフィラメントと、軟化点が125℃以下、好ましくは軟化点が60℃〜125℃、更に好ましくは60℃〜90℃の樹脂を含有する樹脂フィラメントと、が撚り合わされてなるスチールコードが、例えば、ゴム、樹脂またはエラストマー等(以下、ゴム等)で被覆されたものである。軟化点が125℃を上回るとタイヤ加硫時に樹脂フィラメントが軟化しにくくなる、成型作業性が悪くなる、等の影響が表れる。なお、樹脂の軟化点が低すぎると、走行中の発熱により軟化しやすく、スチールフィラメントの緩みが生じやすくなるおそれがあり、好ましくは、樹脂の軟化点は60℃以上である。
<実施例1〜12および比較例1、2>
線径0.36mmのスチールフィラメントおよび線径0.36mmおよび0.15mmの樹脂フィラメントを用いて、図1(a)に示す構造のスチールコードを作製し、得られたスチールコードを被覆ゴムでコーティングしてスチールコード−ゴム複合体を作製した。樹脂フィラメントは、無水マレイン変性SEBSとして、旭化成(株)製タフテックM1943(軟化点:39℃)と、SEBS樹脂として旭化成(株)製タフテックH1052(軟化点:37℃)と、無水酸変性PPとして三井化学(株)社製アドマーQE060(プロピレンベース共重合体 軟化点:123℃)と、アイオノマーとして、三井デュポンポリケミカル社製のハイミラン1702(軟化点:90℃)と、カーボンブラック(旭カーボン社製 旭#55)とを、下記表1〜3の割合で混練した樹脂組成物を延伸して作製した。この際、樹脂フィラメントの紡糸性、得られた樹脂フィラメントの表面、強度について、下記の手順にて評価した。なお、表中の配合量の単位は質量部である。
各実施例および比較例に係る樹脂フィラメントを紡糸する際の作業性について評価を行なった。問題なく紡糸することができた場合を○とし、紡糸の際に断線が生じた場合を×とした。得られた結果を表1〜3に併記する。
得られた各実施例および比較例に係る樹脂フィラメントの表面の粗さについて評価を行なった。評価は目視にて行い、表面が平滑なものを基準とし、相対的に表面の粗さが大きくなるにつれ、小、中、大とした。得られた結果を表1〜3に併記する。
得られた各実施例および比較例に係る樹脂フィラメントを用いてスチールコードを作製する際の作業性について評価を行った。問題なく紡糸することができた場合をAとし、紡糸の際に断線が偶発的に生じた場合をBとし、紡糸の際に断線が生じた場合をCとした。得られた結果を表1〜3に併記する。
得られた各実施例および比較例に係る樹脂フィラメントにつき、JIS L 1013の化学繊維フィラメント糸試験方法に従って測定した。得られた結果を表1〜3に併記する。
加硫後の各実施例および比較例に係るスチールコード−ゴム複合体からスチールコードを取り出し、スチールフィラメントと樹脂との接着性について、目視により評価を行なった。スチールフィラメントと樹脂の間に剥離がみられないものを○、スチールフィラメントと樹脂の間に剥離が生じたものを×とした。得られた結果を表1〜3に併記する。
加硫後の各実施例および比較例に係るスチールコード−ゴム複合体からスチールコードを取り出し、樹脂とゴムとの相溶性について、目視により評価をおこなった。良好な相溶性を有しているものをA、一部分離しているものをB、明らかに分離しているものをCの順で評価した。得られた結果を表1〜3に併記する。
2a、2b スチールフィラメント
3 樹脂
10 スチールコード
Claims (8)
- 少なくとも1枚のベルト層からなるベルトを備えた生タイヤを加硫する加硫工程を有するタイヤの製造方法において、
前記ベルト層が、スチールフィラメントと軟化点が125℃以下の樹脂フィラメントとが撚り合わされてなるスチールコードを有し、かつ、前記樹脂フィラメントが、少なくともアイオノマーを含むことを特徴とするタイヤの製造方法。 - 前記樹脂フィラメントが、樹脂成分100質量部に対して無機フィラーを0.1〜30質量部含む請求項1記載のタイヤの製造方法。
- 前記無機フィラーが、カーボンブラックである請求項2記載のタイヤの製造方法。
- 前記カーボンブラックのグレードが、GPFである請求項3記載のタイヤの製造方法。
- 前記樹脂フィラメントが、さらに酸無水物による変性樹脂を含む請求項1〜4のうちいずれか一項記載のタイヤの製造方法。
- 前記変性樹脂が、マレイン酸変性樹脂および/またはダイマー酸変性樹脂である請求項5記載のタイヤの製造方法
- 前記マレイン酸変性樹脂と前記アイオノマーとの質量比が、4:6〜6:4である請求項6記載のタイヤの製造方法。
- 前記タイヤが重荷重用である請求項1〜7のうちいずれか一項記載のタイヤの製造方法。
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EP17815511.5A EP3476623B1 (en) | 2016-06-24 | 2017-06-23 | Method for manufacturing tire |
ES17815511T ES2876154T3 (es) | 2016-06-24 | 2017-06-23 | Método para fabricar neumáticos |
CN201780038850.2A CN109311346B (zh) | 2016-06-24 | 2017-06-23 | 轮胎的制造方法 |
PCT/JP2017/023181 WO2017222046A1 (ja) | 2016-06-24 | 2017-06-23 | タイヤの製造方法 |
US16/312,377 US20190329593A1 (en) | 2016-06-24 | 2017-06-23 | Method for manufacturing tire |
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WO2020090834A1 (ja) * | 2018-10-30 | 2020-05-07 | 株式会社ブリヂストン | エラストマー補強用コード |
JPWO2019082939A1 (ja) * | 2017-10-25 | 2020-12-17 | 株式会社ブリヂストン | タイヤ |
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EP3617398A4 (en) * | 2017-04-27 | 2021-02-17 | Bridgestone Corporation | ROPE FOR REINFORCEMENT OF ELASTOMERS |
WO2019124559A1 (ja) * | 2017-12-22 | 2019-06-27 | 株式会社ブリヂストン | エラストマー補強用コード |
JP7278745B2 (ja) | 2018-10-30 | 2023-05-22 | 株式会社ブリヂストン | エラストマー補強用コード |
JP7278744B2 (ja) | 2018-10-30 | 2023-05-22 | 株式会社ブリヂストン | エラストマー補強用コード |
FR3099190A1 (fr) * | 2019-07-25 | 2021-01-29 | Compagnie Generale Des Etablissements Michelin | Procédé de fabrication d’au moins trois assemblages |
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