公开(公告)号：EP4461563A2

公开(公告)日：2024-11-13

申请号：EP24173113.2

申请日：2024-04-29

申请人： Nokian Renkaat Oyj

发明人： Liukkula, Mikko ,  Ilomäki, Jouko ,  Heikkinen, Lauri ,  Kemppainen, Noora ,  Laitila, Aappo ,  Shakun, Alexandra

IPC分类号： B60C9/20 ,  B60C1/00 ,  C08L7/00

摘要： The invention relates to a pneumatic tyre, which contains a structure wherein a thermally adaptive underlayer is positioned beneath a tread layer and an intermediate layer, and wherein the thermally adaptive underlayer is based on a polymer system that has been selected to contain elastomers with distinct glass transition temperatures sufficiently far apart from each other and which exhibit low miscibility towards each other. Due to the tyre construction and the thermally adaptive underlayer, while driving a vehicle, the performance characteristics of the pneumatic tyre are configured to adapt to the driving conditions on the road based on the temperature experienced by the thermally adaptive underlayer. This is of particular relevance during colder seasons, such as for a winter tyre, wherein the thermally adaptive underlayer may be used to design an improved tread layer and for a studded pneumatic tyre, wherein the composition and thickness of the thermally adaptive underlayer may be used to control the dynamic impact of the stud on a driving surface, when the tyre is in motion.

公开(公告)号：EP4461768A1

公开(公告)日：2024-11-13

申请号：EP23172093.9

申请日：2023-05-08

申请人： Nokian Renkaat Oyj

发明人： Kemppainen, Noora ,  Ilomäki, Jouko ,  Shakun, Alexandra

IPC分类号： C08L9/00

摘要： The invention relates to a pneumatic tyre, which contains a structure wherein a thermally adaptive underlayer is positioned beneath a tread layer, wherein the thermally adaptive underlayer is based on a polymer system that has been selected to contain elastomers with distinct glass transition temperatures sufficiently far apart from each other and which exhibit low miscibility towards each other. Due to the tyre construction and the thermally adaptive underlayer, while driving a vehicle, the performance characteristics of the pneumatic tyre are configured to adapt to the driving conditions on the road based on the temperature experienced by the thermally adaptive underlayer. This is of particular relevance during colder seasons, such as for a winter tyre, wherein the thermally adaptive underlayer may be used to design an improved tread layer and for a studded pneumatic tyre, wherein the composition and thickness of the thermally adaptive underlayer may be used to control the dynamic impact of the stud on a driving surface, when the tyre is in motion.