Method for the Treatment of Cords for the Reinforcing Layers of Pneumatic Tires

Abstract

Method for the treatment of single-filament polyethylene terephthalate cords for the reinforcing layers of a pneumatic tyre comprising (a) an adhesive solution coating step, wherein the single filament cord is immersed in an adhesive solution; (b) a drying step, wherein the cord covered in adhesive resin is held within a drying oven at a temperature of between 120 and 180° C.; and (c) a thermobonding step wherein the cord, proceeding from the drying step, is arranged within an oven at a temperature of between 230 and 260° C. for a period of between 30 and 90 seconds. During the thermobonding step, the single filament cord is subjected to a tension of between 8 and 12 mN/dtex.

Claims

1-8. (canceled)

9. A method for treatment of single filament polyethylene terephthalate cords for reinforcing layers of a pneumatic tire, said method comprising: an adhesive solution coating step, wherein the single filament cord is immersed in an adhesive solution; a drying step, wherein the cord covered in adhesive resin is held in a drying oven at a temperature of between 120 and 180° C.; and a thermobonding step wherein the cord, proceeding from the drying step, is arranged within an oven at a temperature of between 230 and 260° C. for a period of between 30 and 90 seconds, wherein during said thermobonding step the single filament cord is subjected to a tension of between 8 and 12 mN/dtex.

10. The method of claim 9, wherein said thermobonding step is performed at a temperature of between 235 and 250° C.

11. The method of claim 9, wherein said thermobonding step endures for a period of between 40 and 80 seconds.

12. The method of claim 9, wherein each of said cords has a linear density of between 1000 and 2000 dtex.

13. The method of claim 9, wherein each of said cords has a twist factor of between 70 and 180.

14. The method of claim 9, wherein each of said cords has a twist factor of between 120 and 160.

15. A cap-ply made with plies comprising single filament cords treated using the method of claim 9.

16. The cap-ply of claim 15, wherein said thermobonding step is performed at a temperature of between 235 and 250° C.

17. The cap-ply of claim 15, wherein said thermobonding step endures for a period of between 40 and 80 seconds.

18. The cap-ply of claim 15, wherein each of said cords has a linear density of between 1000 and 2000 dtex.

19. The cap-ply of claim 15, wherein each of said cords has a twist factor of between 70 and 180.

20. The cap-ply of claim 15, wherein each of said cords has a twist factor of between 120 and 160.

21. A pneumatic tyre comprising a cap-ply made with plies comprising single filament cords treated using the method of claim 9.

22. The pneumatic tyre of claim 21, wherein said thermobonding step is performed at a temperature of between 235 and 250° C.

23. The pneumatic tyre of claim 21, wherein said thermobonding step endures for a period of between 40 and 80 seconds.

24. The pneumatic tyre of claim 21, wherein each of said cords has a linear density of between 1000 and 2000 dtex.

25. The pneumatic tyre of claim 21, wherein each of said cords has a twist factor of between 70 and 180.

26. The pneumatic tyre of claim 21, wherein each of said cords has a twist factor of between 120 and 160.

Description