摘要:
A radial tyre for motor vehicle includes: a crown with at least a tread and a crown reinforcement or belt, two inextensible beads, two sidewalls connecting the two inextensible beads to the tread, and a carcass reinforcement passing into the two sidewalls and anchored in the two inextensible beads. The belt is positioned circumferentially between the tread and the carcass reinforcement, and includes textile or metallic reinforcers coated with a rubber composition referred to as a “belt-coating rubber.” The belt-coating rubber, which is capable of reducing the tyre's rolling noise, includes a diene elastomer and more than 50 phr of a filler of high-density particles having a density of greater than 4 g/cm3.
摘要翻译:一种用于机动车辆的子午线轮胎包括:具有至少胎面和胎冠增强件或带的冠部,两个不可伸展的胎圈,将两个不可伸展的胎圈连接到胎面的两个侧壁,以及穿过两个侧壁并锚定在胎面中的胎体加强件 两个不可伸展的珠子。 带子周向地定位在胎面和胎体增强件之间,并且包括涂覆有被称为“带涂层橡胶”的橡胶组合物的织物或金属加强件。 能够降低轮胎滚动噪音的皮带涂布橡胶包括二烯弹性体和超过50phr的密度大于4g / cm 3的高密度颗粒填料。
摘要:
A heat-expandable rubber layer is provided to an inner all of a pneumatic tyre when the tyre is in an uncured state. The rubber layer is expanded when the tyre is in a vulcanized state. Once expanded, the rubber layer is capable of reducing rolling noises of the tyre. The rubber layer includes an elastomer composition based on at least an elastomer, e.g., natural rubber or butyl rubber; a reinforcing filler, e.g., silica and/or carbon black; between 10 and 80 phr of a blowing agent, e.g., an azodicarbonamide compound; and between 10 and 50 phr of a hot-melt compound with a melting point between 70° C. and 150° C., e.g., urea. The combination of the blowing agent and the hot-melt compound, at recommended high contents, makes it possible to very greatly reduce an expansion ratio and therefore a thickness of the rubber layer once the pneumatic tyre is vulcanized, without affecting noise absorption properties provided by the blowing agent.
摘要:
A heat-expandable rubber layer is provided to an inner all of a pneumatic tire when the tire is in an uncured state. The rubber layer is expanded when the tire is in a vulcanized state. Once expanded, the rubber layer is capable of reducing rolling noises of the tire. The rubber layer includes an elastomer composition based on at least an elastomer, e.g., natural rubber or butyl rubber; a reinforcing filler, e.g., silica and/or carbon black; between 10 and 80 phr of a blowing agent, e.g., an azodicarbonamide compound; and between 10 and 50 phr of a hot-melt compound with a melting point between 70° C. and 150° C., e.g., urea. The combination of the blowing agent and the hot-melt compound, at recommended high contents, makes it possible to very greatly reduce an expansion ratio and therefore a thickness of the rubber layer once the pneumatic tire is vulcanized, without affecting noise absorption properties provided by the blowing agent.
摘要:
A radial tyre for reducing rolling noise includes a tread with a contact part located at a radially outer position to make contact with the road, two inextensible beads, two sidewalls connecting the beads to the tread, a carcass reinforcement, a belt arranged circumferentially between the radially outer part of the tread and the carcass reinforcement, and an inner crown layer located at a radially inner position. A formulation of the inner crown layer is different from a formulation of the contact part of the tread, and includes: 50 to 100 phr (parts by weight per hundred parts of elastomer) of a copolymer based on styrene and butadiene with a glass transition temperature of greater than −10° C., a reinforcing filler, and a crosslinking system.
摘要:
Radial tire for motor vehicle, comprising: a crown comprising a tread provided with at least one radially outer part intended to come into contact with the road; two beads, two sidewalls connecting the beads to the tread, a carcass reinforcement passing into the two sidewalls and anchored in the beads; the crown being reinforced by a crown reinforcement or belt placed circumferentially between the carcass reinforcement and the tread; a radially inner elastomer layer known as a “sublayer”, having a formulation different from the formulation of the radially outer elastomer layer, this sublayer being placed between the radially outer layer of the tread and the belt, wherein said sublayer comprises at least one diene elastomer and, as a high-density filler, more than 50 phr of particles having a density of greater than 4 g/cm3. This sublayer of specific formulation has the ability to reduce the rolling noise emitted by the tire without compromising its usage properties.
摘要翻译:用于机动车辆的径向轮胎,包括:冠部,其包括设置有至少一个旨在与道路接触的径向外部的胎面; 两个胎圈,将胎圈连接到胎面的两个侧壁,通过两个侧壁并固定在胎圈中的胎体加强筋; 冠部由在胎体增强件和胎面之间周向放置的胎冠增强件或带增强; 称为“子层”的径向内部弹性体层,其具有与径向外部弹性体层的配方不同的配方,该子层位于胎面的径向外层和带之间,其中所述子层包含至少一种二烯 作为高密度填料,超过50phr的密度大于4g / cm 3的颗粒。 该具体制剂的子层具有降低轮胎发出的滚动噪音而不损害其使用性能的能力。
摘要:
A heat-expandable rubber layer is provided to an inner all of a pneumatic tire when the tire is in an uncured state. The rubber layer is expanded when the tire is in a vulcanized state. Once expanded, the rubber layer is capable of reducing rolling noises of the tire. The rubber layer includes an elastomer composition based on at least an elastomer, e.g., natural rubber or butyl rubber; a reinforcing filler, e.g., silica and/or carbon black; between 10 and 80 phr of a blowing agent, e.g., an azodicarbonamide compound; and between 10 and 50 phr of a hot-melt compound with a melting point between 70° C. and 150° C., e.g., urea. The combination of the blowing agent and the hot-melt compound, at recommended high contents, makes it possible to very greatly reduce an expansion ratio and therefore a thickness of the rubber layer once the pneumatic tire is vulcanized, without affecting noise absorption properties provided by the blowing agent.
摘要:
A radial tyre for a motor vehicle includes a crown, two beads, a crown reinforcement, and an inner crown layer. A tread of the crown includes a contact part located at a radially outer position and intended to make contact with a road surface. The inner crown layer is located at a radially inner position and is formed of an elastomeric material having a different formulation from that of the contact part of the tread. The inner crown layer is arranged circumferentially between the contact part of the tread and the crown reinforcement or between the crown reinforcement and a carcass reinforcement, and functions to reduce rolling noises of the tyre. The elastomeric material includes a rubber composition with at least: 50 to 100 phr of a copolymer based on styrene and butadiene with a Tg greater than −40° C., a reinforcing filler, a hydrocarbon-based plasticizing resin, and a crosslinking system.