JP4433744B2 - 積層体及びそれを用いた空気入りタイヤ - Google Patents
積層体及びそれを用いた空気入りタイヤ Download PDFInfo
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Description
前記熱可塑性樹脂を連続相とし、ゴム組成物を分散相とした熱可塑性エラストマー組成物の空気透過防止層を内側、前記粘接着剤組成物を外側にして円筒状に一体成型した、タイヤカーカスとの接着性に優れ、タイヤの軽量化に寄与する空気透過防止層/粘接着剤の積層体が提供される。
表Iに示す配合の粘接着剤組成物を、スクリュー径40mmφの1軸混練押出機にて混合し、防着液を通した後、カッターにてペレット状に切断した。一方、表IIに示す配合の熱可塑性エラストマー組成物を2軸混練押出機にて混練後、水中にて冷却し、カッターにてペレット状に切断した。これらを、それぞれ、50mmφ、75mmφの押出機を用いて押出し、円筒スタッキングダイを用いてそれぞれ厚さ50μmと150μmの円筒状に押し出した。得られたテストフィルムを用いて、表I下部に示す試験をそれぞれ行った。
1)タック試験
表Iに示す配合の粘接着剤組成物と、表IIに示す熱可塑性エラストマーシートとをそれぞれ50mmφ、75mmφの押出機を用いて押出し、円筒スタッキングダイを用いてそれぞれ厚さ50μmと150μmの円筒状に押し出した。これを幅1cmの帯状に切断し、タックテスターのリング部に取り付け、自着タックの場合は10cm四方に切った同じシートに、カーカス層に対するタックの場合は未加硫のカーカス部材に垂直に押し付け、それを引き剥がす際の力を測定した。測定には(株)東洋精機製作所製PICMAタックテスターを用いて下記条件で測定した。結果は表Iに示す。
圧着荷重 :4.90N
剥離速度 :120mm/min.
圧着時間 :0秒
温度 :20℃
相対湿度 :65%
表Iに示す粘接着剤組成物と表IIに示す熱可塑性エラストマー組成物とを、図1に示すインフレーション成型装置にて粘接着層を外側とする2層のチューブ状に押出し、直径355mmにブロー成型後ピンチロールで折りたたみ、そのまま巻取って、以下の基準で評価した。結果は表Iに示す。
◎:押出性や巻取り性に問題がないもの
○:押出性は問題なく、フィルムがややピンチロールに貼りつく傾向にあるが、大きな問題とはならないもの
△:押出性は問題ないが、フィルムがピンチロールに貼りついて巻取りが困難だったもの
×:押出がうまくいかなかったもの
図1のインフレーション成型装置によって作成した直径355mmの熱可塑性エラストマー/粘接着剤フィルムを、幅360mmに切断した後タイヤ成型ドラムに挿入し、カーカスを巻き付けビードを打ち込んでターンナップし、次いでサイド、ベルト、キャップを貼り付けてグリーンタイヤを成型した。成型後円筒フィムルとカーカスの密着具合を以下の基準で目視で観察した。結果は表Iに示す。
◎:カーカスゴムにぴったり追従し、浮きや剥がれが見られないもの
○:若干の浮きは見られるが、カーカスからの剥がれが見られないもの
△:一部カーカスから剥がれて浮いており、ハンドステッチャーによる修正が必要だったもの
×:カーカスからほぼ全周にわたって剥がれ落ち、加硫工程に持ち込めなかったもの
表Iの各粘接着剤と共に押出成型した熱可塑性エラストマーフィルムを、表IIIに示す2mmの未加硫ゴムシートに貼り合わせて160℃×20分で加硫し、幅25mm、長さ100mmの短冊状に切断した後、熱可塑性エラストマーフィルムの中央部に幅方向にカット傷を入れたサンプルを作製した。これを上島製作所製デマッチャクラック試験機にて、チャック間60mmでストローク10mmの連続的な引張りひずみを50万回繰り返し与えた後、カット傷からのフィルムの剥がれを目視で観察し、以下の基準で評価した。結果は表Iに示す。
◎:フィルムの剥がれが全く見られなかったもの
○:カット傷から微小な剥がれが見られるものの、ゴムまたは粘接着剤の材料破壊であるもの
×:カット傷から大きな剥がれが生じ、界面剥離となっているもの
*1:従来の粘接着剤(主成分:エポキシ変性エチレン−酢酸ビニル共重合体)
*2:エポキシ変性スチレン−ブタジエン−スチレンブロック共重合体
*3:スチレン−ブタジエン−スチレンブロック共重合体
*4:粘着付与樹脂
*5:粘着付与樹脂
*6:粘着付与樹脂
2…粘接着剤押出機
3…ダイ
4…案内板
5…ピンチロール
6…巻取機
7…チューブ状フィルム
Claims (3)
- (I)熱可塑性樹脂を連続相とし、ゴム組成物を分散相とした熱可塑性エラストマー組成物から構成される空気透過防止層並びに(II)前記空気透過防止層の片面に、(i)オキシラン酸素濃度が1.0〜3.0重量%になるようにエポキシ変性されたスチレン−ブタジエン系ブロック共重合体を50重量部以上含む熱可塑性エラストマー合計100重量部、(ii)重量平均分子量Mwが1000以下、軟化点が60〜120℃のテルペン樹脂(A)及び芳香族変性テルペン樹脂(B)を、(A):(B)=100:0〜50:50(重量比)の割合で合計30〜200重量部、(iii)内部離型剤0.1〜3重量部並びに(iv)1分半減期温度が160℃以上である有機過酸化物0.1〜2重量部を含み、自着タックが5N未満で、未加硫ジエン系ゴムに対するタックが5N以上である粘接着剤組成物から構成される、厚さ100μm以下の粘接着剤層を配置した空気透過防止層/粘接着剤層の積層体。
- 熱可塑性樹脂を連続相とし、ゴム組成物を分散相とした熱可塑性エラストマー組成物の前記空気透過防止層を内側、前記粘接着剤組成物を外側にして円筒状に一体成型したものである請求項1に記載の空気透過防止層/粘接着剤層の積層体。
- 請求項1又は2に記載の積層体を用いた空気入りタイヤ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2003336057A JP4433744B2 (ja) | 2003-09-26 | 2003-09-26 | 積層体及びそれを用いた空気入りタイヤ |
CN200480027823A CN100575069C (zh) | 2003-09-26 | 2004-09-08 | 层压物及使用其的充气轮胎 |
EP04773073.4A EP1666242B1 (en) | 2003-09-26 | 2004-09-08 | Laminate and pneumatic tires made by using the same |
PCT/JP2004/013400 WO2005030479A1 (ja) | 2003-09-26 | 2004-09-08 | 積層体及びそれを用いた空気入りタイヤ |
US10/572,549 US7730919B2 (en) | 2003-09-26 | 2004-09-08 | Laminate and pneumatic tires made by using the same |
Applications Claiming Priority (1)
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JP2003336057A JP4433744B2 (ja) | 2003-09-26 | 2003-09-26 | 積層体及びそれを用いた空気入りタイヤ |
Publications (3)
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JP2005103760A JP2005103760A (ja) | 2005-04-21 |
JP2005103760A5 JP2005103760A5 (ja) | 2006-03-30 |
JP4433744B2 true JP4433744B2 (ja) | 2010-03-17 |
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JP2003336057A Expired - Fee Related JP4433744B2 (ja) | 2003-09-26 | 2003-09-26 | 積層体及びそれを用いた空気入りタイヤ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7730919B2 (ja) |
EP (1) | EP1666242B1 (ja) |
JP (1) | JP4433744B2 (ja) |
CN (1) | CN100575069C (ja) |
WO (1) | WO2005030479A1 (ja) |
Cited By (1)
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- 2003-09-26 JP JP2003336057A patent/JP4433744B2/ja not_active Expired - Fee Related
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2004
- 2004-09-08 WO PCT/JP2004/013400 patent/WO2005030479A1/ja active Application Filing
- 2004-09-08 CN CN200480027823A patent/CN100575069C/zh not_active Expired - Fee Related
- 2004-09-08 US US10/572,549 patent/US7730919B2/en not_active Expired - Fee Related
- 2004-09-08 EP EP04773073.4A patent/EP1666242B1/en not_active Expired - Fee Related
Cited By (2)
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WO2014208539A1 (ja) | 2013-06-24 | 2014-12-31 | 横浜ゴム株式会社 | 積層体、インナーライナー材および空気入りタイヤ |
US9878581B2 (en) | 2013-06-24 | 2018-01-30 | The Yokohama Rubber Co., Ltd. | Laminate, inner liner material and pneumatic tire |
Also Published As
Publication number | Publication date |
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CN100575069C (zh) | 2009-12-30 |
EP1666242A4 (en) | 2008-04-23 |
EP1666242A1 (en) | 2006-06-07 |
CN1856399A (zh) | 2006-11-01 |
US20070031661A1 (en) | 2007-02-08 |
EP1666242B1 (en) | 2014-09-03 |
US7730919B2 (en) | 2010-06-08 |
WO2005030479A1 (ja) | 2005-04-07 |
JP2005103760A (ja) | 2005-04-21 |
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