CN106457907B - 具有复合帘线增强物的充气子午轮胎 - Google Patents

具有复合帘线增强物的充气子午轮胎 Download PDF

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CN106457907B
CN106457907B CN201580013428.2A CN201580013428A CN106457907B CN 106457907 B CN106457907 B CN 106457907B CN 201580013428 A CN201580013428 A CN 201580013428A CN 106457907 B CN106457907 B CN 106457907B
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CN106457907A (zh
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K.阿克索伊
B.A.梅拓
A.B.伊根
S.菲丹
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Husky Global Yarn Industry Of Coude And Trade Joint-Stock Co
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Abstract

充气子午轮胎包括形成轮胎(1)的最外层的胎面(4)，以及形成轮胎(1)的"内层"的胎体(3)的顶部上的至少一个带束(5)。作为冠带层增强层(6)，应用了复合帘线，其包括聚对苯二甲酸乙二醇酯(PET)和尼龙6.6复丝纱线，以提供具有高速耐用性和低平点特征的充气子午轮胎。

Description

具有复合帘线增强物的充气子午轮胎
技术领域
本发明涉及复合帘线的应用，其包括聚对苯二甲酸乙二醇酯(PET)和尼龙6.6复丝纱线作为充气子午轮胎中的冠带层增强材料，该充气子午轮胎具有高速耐用性和低平点特征。
背景技术
已知的是，关于带束组件上的赤道面以小角螺旋卷绕的增强材料尤其改进了子午轮胎中的高速性能。使用聚合(尼龙6.6、PET、芳纶/尼龙等)帘线作为冠带层增强物如带由若干轮胎公司应用许多年，以便改进充气子午轮胎中的高速耐用性和操纵性能。所述帘线带通过在挤出过程期间切割带中的压延(用橡胶处理)的帘线织物或在一定宽度内用橡胶处理平行的单帘线来获得。
使用冠带层增强物的目的在于通过避免由高速下在带束组件中发生的离心力引起的带束层分离来提高轮胎的高速耐用性。尤其是由轮胎相对于带束边缘分离示出的阻力的强度对于高速耐用性而言非常重要。
当尼龙用作冠带层增强材料时，存在两个重要缺点。第一缺点是由于其低模量而用作多于一层的职责。而第二缺点是由于在停车时冷却高速下加热的轮胎而引起的暂时几何形状变形(平点)，因为聚合物的玻璃化温度(Tg)为低的。
美国专利文献No US7584774(现有技术中已知的申请)公开了将高模量聚对苯二甲酸乙二醇酯帘线用作冠带层增强材料，以便提高轮胎的高速耐用性并且减少暂时几何形状变形(平点)问题。在其中建议冠带层帘线的切向模量高于在160℃，29.4N下2.5mN/dtex.%的该实施例中，存在在硫化过程期间切割涂覆橡胶的帘线的风险。出于该原因，建议过程膨胀将为最大2%。此外，具有高于尼龙6.6帘线的模量的聚对苯二甲酸乙二醇酯帘线在循环变形下的疲劳故障风险比尼龙6.6帘线高。
现有技术中已知的德国专利文献No DE102012105766和DE102007025490公开了用于弹性体产品的强度支承层，以及包含至少一个强度支承层的充气车辆轮胎。
为了提高轮胎的高速耐用性，位于带束组件上的冠带层增强帘线应当抵抗可在高速下由于离心力而出现的轮胎增长。
形成在冠带层增强帘线中的所述轮胎增长阻力包括以下全部：
在硫化过程之后在冠带层增强帘线中出现的应力(冷残余张力)，
由于因高速的带束区的升高温度而生成的热收缩力，
以及所述温度下的帘线模量。
发明内容
本发明的目的在于提供一种充气子午轮胎，其包括冠带层增强物。
本发明的另一个目的在于提供一种充气子午轮胎，其中冠带层增强层中的复合帘线包括聚对苯二甲酸乙二醇酯(PET)和尼龙6.6复丝纱线。
本发明的又一个目的在于提供一种以复合帘线增强的子午轮胎，其中带束帘线上的压力通过增大热收缩力在高速和高温下增大。
附图说明
开发成满足本发明的目的的以复合帘线增强的充气子午轮胎在附图中示出，在该附图中：
图1为本发明的子午轮胎的正视截面视图。
图2为用作冠带层增强层的复合帘线的透视图。
图3为存在于冠带层增强层中的复合帘线的Z和S扭转方向的限定。
附图中示出的构件均被给予如下附图标记:
1.以复合帘线增强的充气子午轮胎
2.胎圈环
3.胎体
4.胎面
5.带束
6.冠带层增强层
61.复合帘线
62.PET复丝纱线
63.尼龙6.6复丝纱线
7.带束边缘增强层。
具体实施方式
本发明的充气子午轮胎1基本上包括形成轮胎1的最外层的至少一个胎面4，以及形成轮胎1的内层的胎体3上的至少一个带束5。轮胎1以至少一个冠带层增强层6增强，其通过使用复合帘线61获得，复合帘线61通过扭转聚对苯二甲酸乙二醇酯(PET)62和尼龙6.6复丝纱线63形成，并且其热收缩力和模量通过施加热固化过程增大；因此提高了轮胎1的高速耐用性。冠带层增强层6在形成轮胎1的外层的胎面4与由钢材料形成的带束5之间。冠带层增强层6在带束5上螺旋地卷绕作为带，使得其将关于赤道面成0到5度之间的角。
为热过程的热固化过程包括在180到240℃下使复合帘线61伸展最小1%。该过程使对应于3%水平的帘线61的张力值增大至25℃下最小8mN/dtex，并且其使热收缩力增大至177℃下高于2mN/dtex。即，冠带层增强层6是通过使用复合帘线61获得，该复合帘线61的张力(LASE值)根据ASTM D855测试方法在3%伸长下在25℃下最小8mN/dtex，并且其热收缩力根据ASTM D855测试方法在177℃下最小2mN/dtex。
在热固化过程中，复合帘线61还通过施加间苯二酚甲醛乳胶(RFL)浸渍溶液而设有关于轮胎1中的橡胶的粘合性质。
在本发明的优选实施例中，存在卷绕在冠带层增强层6的各侧上的至少一个带束边缘增强层7，以便支承冠带层增强层6。具有带增大的热收缩力且卷绕在带束6和带束边缘增强层7上的复合帘线61的冠带层增强层6实现通过提供相对于轮胎1的直径的增大的阻力来提高高速耐用性。
形成冠带层增强层6的复合帘线61通过沿Z或S方向扭转预先扭转的PET62和尼龙63，使得它们将沿预先扭转方向的相反方向来获得。扭转水平在100到800捻/米之间变化，优选200到400捻/米，在本发明的优选实施例中，复合帘线61的扭转水平等于纱线的预先扭转水平，或者其具有最大10%的差异。
冠带层增强层6的宽度应当等于带束5的宽度，或者其应当比带束更宽。
作为用作围绕带束5卷绕的带的冠带层增强层6的宽度在5mm到30mm之间变化，优选8mm到15mm。设在10mm宽度的冠带层增强层6中的帘线61的数量可在5到20之间变化。
增强层6可在涂覆有橡胶或不涂覆有橡胶时存在于轮胎1中。冠带层增强层6中的复合帘线61的线密度在500到6000dtex之间。在本发明的优选实施例中，尼龙6.6复丝纱线63的线密度小于PET复丝纱线62的线密度。在本发明的一个实施例中，形成复合帘线61的尼龙6.6纱线63的线密度为1400dtex，而PET纱线62的线密度为1440dtex。
线密度为以克为单位的10000米长度的纱线的重量，并且其单位值为dtex。

Claims (12)

1.一种具有复合帘线增强物的充气子午轮胎，包括
形成所述轮胎(1)的最外层的胎面(4)，
形成所述轮胎(1)的内层的胎体(3)上的至少一个带束(5)，以及
至少一个冠带层增强层(6)，其通过使用复合帘线(61)获得，
·所述复合帘线(61)通过沿Z或S方向扭转预先扭转的聚对苯二甲酸乙二醇酯(PET)复丝纱线(62)和尼龙(63)纱线，使得它们将沿所述预先扭转方向的相反方向来形成，
·其中所述复合帘线(61)的扭转水平等于纱线的预先扭转水平，或者其具有最大10%的差异，
·所述冠带层增强层(6)被螺旋地卷绕作为带，使得其将关于所述带束(5)上的赤道面成0到5°的角，
并且特征在于，
·所述复合帘线(61)的热收缩力和模量通过在180到240℃下伸展最小1%来增大，
·所述复合帘线(61)的张力根据ASTM D855测试方法在3%伸长下在25℃下最小8mN/dtex，并且其热收缩力根据ASTM D855测试方法在177℃下最小2mN/dtex。
2.根据前述权利要求1所述的具有复合帘线增强物的充气子午轮胎，其特征在于，至少一个带束边缘增强层(7)，其设在所述冠带层增强层(6)的两侧上，并且其实现通过提供相对于轮胎直径的增大的阻力来提高高速耐用性。
3.根据前述权利要求1-2中任一项所述的具有复合帘线增强物的充气子午轮胎，其特征在于，至少一个冠带层增强层(6)，其具有通过在100到800捻/米的范围中沿Z或S方向扭转聚对苯二甲酸乙二醇酯(PET)复丝纱线(62)和尼龙6.6复丝纱线(63)来形成的复合帘线(61)。
4.根据权利要求3所述的具有复合帘线增强物的充气子午轮胎，其特征在于，所述复合帘线(61)通过以200到400捻/米的扭转水平扭转聚对苯二甲酸乙二醇酯(PET)复丝纱线(62)和尼龙6.6复丝纱线(63)来形成。
5.根据前述权利要求1-2中任一项所述的具有复合帘线增强物的充气子午轮胎，其特征在于，至少一个冠带层增强层(6)，其宽度等于所述带束(5)的宽度，或者比所述带束的宽度宽。
6.根据权利要求5所述的具有复合帘线增强物的充气子午轮胎，其特征在于，至少一个冠带层增强层(6)，其带宽度值在5mm到30mm之间。
7.根据权利要求6所述的具有复合帘线增强物的充气子午轮胎，其特征在于，至少一个冠带层增强层(6)，其带宽度值在8mm到15mm之间。
8.根据权利要求5所述的具有复合帘线增强物的充气子午轮胎，其特征在于，至少一个冠带层增强层(6)，其中10mm的宽度中的复合帘线(61)的数量在5到20之间变化。
9.根据权利要求6所述的具有复合帘线增强物的充气子午轮胎，其特征在于，至少一个冠带层增强层(6)，其中10mm的宽度中的复合帘线(61)的数量在5到20之间变化。
10.根据权利要求7所述的具有复合帘线增强物的充气子午轮胎，其特征在于，至少一个冠带层增强层(6)，其中10mm的宽度中的复合帘线(61)的数量在5到20之间变化。
11.根据前述权利要求1-2中任一项所述的具有复合帘线增强物的充气子午轮胎，其特征在于，至少一个冠带层增强层(6)，其具有线密度在500到6000dtex之间的复合帘线(61)。
12.根据权利要求11所述的具有复合帘线增强物的充气子午轮胎，其特征在于，至少一个冠带层增强层(6)，其具有复合帘线，其中尼龙6.6复丝纱线(63)的线密度小于所述聚对苯二甲酸乙二醇酯(PET)复丝纱线(62)的线密度。
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