Heatable belt strap, and seat belt system

1 . A heatable belt webbing for a seatbelt system of an automotive vehicle, wherein the webbing comprises plural heatable sections extending over respective different longitudinal portions of the webbing, wherein at least one heating conductor is associated with each heatable section in such a manner that the heatable sections can be heated separately from each other by appropriate activation of the individual heat conductors, all the heating conductors extending through all of the heatable sections, wherein the webbing has a woven webbing body which includes warp threads extending in the longitudinal direction and weft threads extending transversely to the warp threads, the heating conductors being woven into the webbing body as a warp thread, and in that the heating conductors associated with a heatable section are guided to a surface of the webbing at the beginning and/or at the end of each heatable section.

2 . The webbing according to claim 1 , wherein at least two heating conductors extending in parallel to each other are associated with each heatable section.

3 . The webbing according to claim 1 , wherein the heatable sections are arranged to overlap in the longitudinal direction.

4 . The webbing according to claim 1 , wherein all heatable sections extend from an initial portion of the webbing and all heatable sections start at the same longitudinal position (L) of the webbing.

5 . The webbing according to claim 1 , wherein the heating conductors associated with the same heatable section are electrically interconnected.

6 . The webbing according to claim 1 , wherein the heating conductors are woven into the webbing body as warp threads and the heating conductors are electrically interconnected by means of electrically conducting weft threads to close a circuit.

7 . The webbing according to claim 1 , wherein the heating conductor is formed by a bipolar conductor having two individual conductors insulated from each other, wherein the individual conductors are electrically interconnected in an end portion of the heating conductor.

8 . The webbing according to claim 1 , wherein a temperature sensor is integrated in the webbing.

9 . A seatbelt system for an automotive vehicle comprising a heatable webbing according to claim 1 and a power source which is connected to the heating conductors.

10 . The webbing according to claim 1 , wherein all the heating conductors are connected to power at the same longitudinal location on the webbing.

11 . The webbing according to claim 1 , wherein the heating conductors associated with a heatable section are only guided to a surface of the webbing at the beginning and/or at the end of each heatable section.

12 . The webbing according to claim 4 , wherein a first heatable section has a first length along the webbing and a second heatable section has a second length along the webbing longer than the first length.

13 . A heatable belt webbing for a seatbelt system of an automotive vehicle, wherein the webbing comprises plural heatable sections extending over respective different longitudinal portions of the webbing, wherein at least one heating conductor is associated with each heatable section in such a manner that the heatable sections can be heated separately from each other by appropriate activation of the individual heat conductors, wherein the webbing has a woven webbing body which includes warp threads extending in the longitudinal direction and weft threads extending transversely to the warp threads, the heating conductors being woven into the webbing body as a warp thread, and in that the heating conductors associated with a heatable section are guided to a surface of the webbing at the beginning and/or at the end of each heatable section, wherein first heating conductors heat a first heatable section and second heating conductors heat a second heatable section, the first and second heating conductors extending through the first and second heatable sections.

14 . The webbing according to claim 1 , wherein the first and second heating conductors are connectable to a power source at the same longitudinal position along the webbing.

15 . The webbing according to claim 13 , wherein the first and second heatable sections overlap in the longitudinal direction.

16 . The webbing according to claim 13 , wherein the first and second heatable sections extend from an initial portion of the webbing and start at the same longitudinal position of the webbing.

17 . The webbing according to claim 16 , wherein the first heatable section has a first length along the webbing and the second heatable section has a second length along the webbing longer than the first length.

18 . The webbing according to claim 13 , wherein the first heating conductors are electrically interconnected and the second heating conductors are electrically interconnected.

19 . The webbing according to claim 13 , wherein the first heating conductors are woven into the webbing body as warp threads and the first heating conductors are electrically interconnected by means of electrically conducting weft threads to close a circuit, the second heating conductors being woven into the webbing body as warp threads and the second heating conductors being electrically interconnected by means of electrically conducting weft threads to close a circuit.

20 . The webbing according to claim 13 , wherein the first heating conductors are only guided to a surface of the webbing at the beginning and/or at the end of the first heatable section and the second heating conductors are only guided to a surface of the webbing at the beginning and/or at the end of the second heatable section.