JP4412406B2 - 低透過性ゴム積層体の製造方法 - Google Patents
低透過性ゴム積層体の製造方法 Download PDFInfo
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Landscapes
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- Mechanical Engineering (AREA)
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Description
本発明に従えば、また、空気透過係数が1.0×10 -12 cc・cm/cm 2 ・sec・cmHg以下であり、且つ平均厚dが0.05<d<5μmである低透過性樹脂(A)層と、(A)層と擬似接着状態にあり、且つ(A)層との室温における剥離強度が0.001〜10N/mmである熱可塑性樹脂組成物(B)層、及び接着剤(C)の(B)/(A)/(C)の順で積層された3層積層体(D)を、ゴム組成物(E)層と、(B)/(A)/(C)/(E)となるように積層させて加硫し、加硫後の低透過性樹脂(A)層/ゴム組成物(E)層間の剥離強度が(A)層/(B)層間の剥離強度より大きくなるようにして、熱可塑性樹脂組成物(B)のみを積層体から剥離させることを含んでなる、ゴム組成物(E)層の一方の面に低透過性樹脂(A)層を積層させた低空気透過性樹脂ゴム積層体(F)の製造方法が提供される。
積層体(D)の作製
3層ダイス付きのインフレーション成形機を用いて、表I、表II、表III及び表IVに示すように、熱可塑性樹脂組成物(B)/低透過性樹脂(A)/接着剤(C)の円筒状積層体(D)を作製した。比較例3として、熱可塑性樹脂組成物(B)/低透過性樹脂組成物(A)の2層からなる積層体(D)を作製した。また、比較例4として、ナイロン11(BESNO TL)/接着剤の2層からなる積層体(D)を作製した。
<タイヤインナーライナーとしての評価>
作製した積層体(D)をインナーライナーの代わりに用い、タイヤ(サイズ:165SR13(リム13×4 1/2−J))を一般的方法で作製した。タイヤ作製後、(B)層を、剥がすことにより、タイヤ最内面がエチレンビニルアルコール共重合体でコーティングされたインナーライナー層と有するタイヤを得た。これらのタイヤの室内タイヤ走行テスト、エア漏れ評価を行った。
<剥離強度の測定>
(A)/(B)間の剥離強度は、(A)/(B)/接着剤(C)/ゴム組成物(E)の順に積層させて加硫し、(B)/ゴム組成物間の接着力を十分に強めて、(A)/(B)間を剥離させることが出来る状態にしてから、JIS6256に従い測定を行った。
(B)/ゴム組成物(E)間の剥離強度測定は、(A)/(B)の剥離強度が(B)/ゴム組成物(E)間により弱い場合、(A)/(B)間で剥離してしまうため、測定できない場合がある。よって、(B)/ゴム組成物(E)の剥離強度は、(B)/接着剤(C)の2層インフレーション積層体を作製し、つづいて(B)/接着剤(C)/ゴム組成物(E)の順に積層させて加硫し、(B)/ゴム組成物(E)間を剥離させることにより求めた。
<室内タイヤ評価>
作製した165SR13スチールラジアルタイヤ(リム13×4 1/2−J)を用い、空気圧200kPaで1500ccクラス乗用車において4名乗用時相当の荷重(65kg/人)を与え、実路上を2万km走行した。走行後に、タイヤをリムから外し、タイヤ内面の(A)層を目視観察し、(A)層にクラックがあるもの、(A)層の剥離・浮き上がりがあるものを不合格、ないものを合格と判定した。
判定方法
良好:(A)層にクラック及び剥離が見られない場合
不良:(A)層にクラック及び剥離が見られた場合
165SR13スチールラジアルタイヤ(リム13×4 1/2−J)を用い、初期圧力200kPa、無負荷条件にて室温21度で3ヶ月放置して測定間隔4日毎に圧力を測定した。測定圧力Pt、初期圧力P0、及び経過日数tとして関数、
Pt/P0=exp(−αt)
に回帰してα値を求めた。得られたαを用い、t=30を下式に代入し、
β=[1−exp(−αt)]×100
により、β値を得る。このβ値を1ヶ月あたりの圧力低下率(エア漏れ率)(%/月)とした。
エア漏れ判定基準
良好:エア漏れ<2.5%/月
可:2.5%/月<エア漏れ<4.0%/月
不良:エア漏れ>4.0%/月
比較例3では、熱可塑性樹脂組成物(B)/低透過性樹脂組成物(A)の2層からなる積層体(D)を用いた。(A)/(B)間剥離強度が、(B)/ゴム間剥離強度未満であるため、(A)層がゴム層にコーティングされなかった。
<タイヤサイドパーツとしての評価>
表VIに示すように積層体(D)層を、サイドゴムコンパウンドに積層させ、ついで従来の一般的方法でタイヤを作製した。タイヤ加硫後、(B)層を剥がすことにより、タイヤサイドにEVOH薄膜がコーティングされたタイヤを得た。結果を表VIに示す。
剥離強度:ライナーの場合と同じ
酸素劣化評価:作製した165SR13スチールラジアルタイヤ(リム13×4 1/2−J)を用い、空気圧120kPaで1500ccクラス乗用車において4名乗用時相当の荷重(65kg/人)を与え、タイヤの両サイドにオゾンを照射しながら5000km走行した。走行後、サイド部のオゾンクラック発生を目視により確認した。
判定方法
良好:サイド部からオゾンクラック発生が無い場合
不良:サイド部からオゾンクラック発生が見られた場合
Claims (7)
- 空気透過係数が1.0×10-12cc・cm/cm2・sec・cmHg以下であり、且つ平均厚dが0.05<d<5μmである低透過性樹脂(A)層と、(A)層と擬似接着状態にあり、且つ(A)層との室温における剥離強度が0.001〜10N/mmである熱可塑性樹脂組成物(B)層との積層体(D)を、ゴム組成物(E)層と(B)/(A)/(E)となるように積層させて加硫し、加硫後の低透過性樹脂(A)層/ゴム組成物(E)層間の剥離強度が(A)層/(B)層間の剥離強度より大きくなるようにして、熱可塑性樹脂組成物(B)のみを積層体から剥離させることを含んでなる、ゴム組成物(E)層の一方の面に低透過性樹脂(A)層を積層させた低空気透過性ゴム積層体(F)の製造方法。
- 空気透過係数が1.0×10-12cc・cm/cm2・sec・cmHg以下であり、且つ平均厚dが0.05<d<5μmである低透過性樹脂(A)層と、(A)層と擬似接着状態にあり、且つ(A)層との室温における剥離強度が0.001〜10N/mmである熱可塑性樹脂組成物(B)層、及び接着剤(C)の(B)/(A)/(C)の順で積層された3層積層体(D)を、ゴム組成物(E)層と、(B)/(A)/(C)/(E)となるように積層させて加硫し、加硫後の低透過性樹脂(A)層/ゴム組成物(E)層間の剥離強度が(A)層/(B)層間の剥離強度より大きくなるようにして、熱可塑性樹脂組成物(B)のみを積層体から剥離させることを含んでなる、ゴム組成物(E)層の一方の面に低透過性樹脂(A)層を積層させた低空気透過性樹脂ゴム積層体(F)の製造方法。
- 積層体(D)が多層共押出又は多層インフレート成形物である請求項1又は2に記載の低空気透過性ゴム積層体(F)の製造方法。
- 低透過性樹脂(A)がエチレン−ビニルアルコール共重合体である請求項1〜3のいずれか1項に記載の低透過性ゴム積層体(F)の製造方法。
- エチレン−ビニルアルコール共重合体のエチレン組成比が50mol%以下である請求項1〜4のいずれか1項に記載の低空気透過性ゴム積層体(F)の製造方法。
- 熱可塑性樹脂組成物(B)がポリアミド樹脂及びポリエステル樹脂からなる群から選ばれる少なくとも1種である請求項1〜5のいずれか1項に記載の低空気透過性ゴム積層体(F)の製造方法。
- 熱可塑性樹脂組成物(B)がナイロン11及びナイロン12からなる群から選ばれる少なくとも1種である請求項1〜6のいずれか1項に記載の低空気透過性ゴム積層体(F)の製造方法。
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JP2005288219 | 2005-09-30 | ||
JP2005288219 | 2005-09-30 | ||
PCT/JP2006/320022 WO2007037541A1 (ja) | 2005-09-30 | 2006-09-29 | 低空気透過性樹脂/ゴム組成物の低空気透過性ゴム積層体及びその製造方法 |
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JPWO2007037541A1 JPWO2007037541A1 (ja) | 2009-04-16 |
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US (2) | US7976666B2 (ja) |
EP (1) | EP1930152B1 (ja) |
JP (1) | JP4412406B2 (ja) |
CN (1) | CN101272902B (ja) |
WO (1) | WO2007037541A1 (ja) |
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JP4278697B2 (ja) * | 2006-03-03 | 2009-06-17 | 横浜ゴム株式会社 | 低透過性ゴム積層体及びそれを用いた空気入りタイヤ |
EP2008809B1 (en) * | 2006-04-18 | 2013-12-25 | The Yokohama Rubber Co., Ltd. | Layered low-permeability rubber product and pneumatic tire comprising the same |
JP4368413B2 (ja) * | 2006-11-02 | 2009-11-18 | 横浜ゴム株式会社 | 低透過性樹脂の多層フィルムを用いた低透過性ゴム積層体の製造方法 |
CN101754867B (zh) * | 2007-07-23 | 2012-07-18 | 横滨橡胶株式会社 | 充气轮胎 |
WO2009041710A1 (ja) * | 2007-09-27 | 2009-04-02 | The Yokohama Rubber Co., Ltd. | 熱可塑性樹脂組成物及びそれを用いた空気入りタイヤ |
JP5417802B2 (ja) * | 2008-11-04 | 2014-02-19 | 横浜ゴム株式会社 | 空気入りタイヤの製造方法 |
US9186873B2 (en) | 2009-12-01 | 2015-11-17 | Kuraray Co., Ltd. | Multilayered structure and method for producing the same |
BR112012013361B1 (pt) * | 2009-12-01 | 2019-09-10 | Bridgestone Corp | revestimento interno para pneu pneumático, e método para sua produção |
US9375980B2 (en) * | 2010-07-16 | 2016-06-28 | Exxonmobil Chemical Patents Inc. | Adhesive extrusion for dynamically vulcanized thermoplastic elastomer laminates |
KR20150038720A (ko) * | 2010-10-01 | 2015-04-08 | 가부시키가이샤 구라레 | 다층 구조체, 이것을 이용한 이너 라이너 및 공기식 타이어 |
JP5939734B2 (ja) * | 2010-11-02 | 2016-06-22 | 横浜ゴム株式会社 | 空気入りタイヤ |
US8454778B2 (en) | 2010-11-15 | 2013-06-04 | Ramendra Nath Majumdar | Pneumatic tire with barrier layer and method of making the same |
KR101475494B1 (ko) | 2010-12-30 | 2014-12-31 | 코오롱인더스트리 주식회사 | 타이어 이너라이너용 필름 및 이의 제조 방법 |
US8534331B2 (en) | 2011-12-13 | 2013-09-17 | The Goodyear Tire & Rubber Company | Tire containing layered composite of sealant and air permeation resistant film |
JP5354057B2 (ja) * | 2012-05-08 | 2013-11-27 | 横浜ゴム株式会社 | 空気入りタイヤ |
CN102896974A (zh) * | 2012-10-25 | 2013-01-30 | 北京化工大学 | 耐臭氧老化的高性能轮胎及其制造方法 |
EP2970663B1 (en) | 2013-03-13 | 2022-02-02 | Basf Se | Inner liner for a pneumatic tire assembly |
DE102013103663B4 (de) * | 2013-04-11 | 2014-10-23 | Nora Systems Gmbh | Verfahren zum Herstellen eines eine Dekorschicht aufweisenden Elastomer-Bodenbelags und Elastomer-Bodenbelag mit einer Dekorschicht |
JP6115386B2 (ja) * | 2013-07-31 | 2017-04-19 | 横浜ゴム株式会社 | 熱可塑性樹脂組成物並びにそれを用いたタイヤ及びホース |
EP3480033B1 (en) * | 2016-06-30 | 2021-04-07 | Kolon Industries, Inc. | Pneumatic tire |
WO2018094026A1 (en) | 2016-11-17 | 2018-05-24 | Bridgestone Americas Tire Operations, Llc | Pneumatic tire having dampening element adhered to air barrier layer |
DE102022214255A1 (de) * | 2022-12-21 | 2024-06-27 | Continental Reifen Deutschland Gmbh | Verfahren zur Herstellung eines Fahrzeugluftreifenrohlings und entsprechender Fahrzeugreifen |
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US6079465A (en) * | 1995-01-23 | 2000-06-27 | The Yokohama Rubber Co., Ltd. | Polymer composition for tire and pneumatic tire using same |
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JP4450497B2 (ja) | 2000-09-07 | 2010-04-14 | 株式会社ブリヂストン | 空気入りタイヤ |
JP3920611B2 (ja) * | 2001-09-28 | 2007-05-30 | ヤマウチ株式会社 | 熱プレス用クッション材およびその製造方法 |
ES2305385T3 (es) * | 2002-11-13 | 2008-11-01 | Bridgestone Corporation | Revestimiento interno para cubierta de neumatico y cubierta de neumatico. |
JP2004255937A (ja) | 2003-02-25 | 2004-09-16 | Bridgestone Corp | 支持体および空気入りランフラットタイヤ |
-
2006
- 2006-09-29 EP EP06811349A patent/EP1930152B1/en not_active Ceased
- 2006-09-29 US US12/088,607 patent/US7976666B2/en not_active Expired - Fee Related
- 2006-09-29 WO PCT/JP2006/320022 patent/WO2007037541A1/ja active Application Filing
- 2006-09-29 JP JP2007537779A patent/JP4412406B2/ja not_active Expired - Fee Related
- 2006-09-29 CN CN2006800356556A patent/CN101272902B/zh not_active Expired - Fee Related
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JPWO2007037541A1 (ja) | 2009-04-16 |
EP1930152A1 (en) | 2008-06-11 |
WO2007037541A1 (ja) | 2007-04-05 |
US7976666B2 (en) | 2011-07-12 |
EP1930152B1 (en) | 2012-06-13 |
EP1930152A4 (en) | 2011-11-16 |
US20110217536A1 (en) | 2011-09-08 |
CN101272902A (zh) | 2008-09-24 |
CN101272902B (zh) | 2012-08-29 |
WO2007037541A9 (ja) | 2007-05-31 |
US20100147431A1 (en) | 2010-06-17 |
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