ELEVATOR TENSION ELEMENT BELT WITH FLAME-RETARDANT PROPERTIES

Abstract

A belt for drive systems includes: an elastic and flame-retardant belt body made from a polymeric material and at least one flame retardant additive, the belt body having a cover layer as a belt back and a substructure which has a force transmission zone; and a tension member embedded in the belt body, wherein the belt body is partially or completely provided with a coating, which coating is single- or multi-layered.

Claims

1. A method for manufacturing a belt for drive systems, the belt including an elastic and flame-retardant belt core formed of a polymeric material and at least one flame-retardant additive, a coating of at least one layer at least partially covering the belt core, and at least one tension member embedded in the belt core, the method comprising: a step of partially or completely applying the coating to the belt core by one of spraying, brushing, rolling and immersion after the belt core with the at least one tension member embedded is formed.

2. The method of claim 1, wherein the step of partially or completely applying the coating to the belt core includes spraying after the belt core with the at least one tension member embedded is formed.

3. The method of claim 1, wherein the step of partially or completely applying the coating to the belt core includes brushing after the belt core with the at least one tension member embedded is formed.

4. The method of claim 1, wherein the step of partially or completely applying the coating to the belt core includes rolling after the belt core with the at least one tension member embedded is formed.

5. The method of claim 1, wherein the step of partially or completely applying the coating to the belt core includes immersion after the belt core with the at least one tension member embedded is formed.

6. A method for manufacturing a belt for a drive system, the method comprising: providing a belt including an elastic and flame-retardant belt core formed of a polymeric material and at least one flame-retardant additive, the belt core including at least one tension member embedded therein; and applying a coating of at least one layer to at least partially cover the belt core.

7. The method of claim 6, wherein the belt and the coating have different proportions of a flame-retardant additive.

8. The method of claim 6, wherein the belt is only partially covered with the coating.

9. The method of claim 8, wherein the coating is applied to a substructure of the belt.

10. The method of claim 6, wherein coating includes polyurethane.

11. The method of claim 10, wherein coating has a Shore hardness of greater than 80 ShA.

12. The method of claim 10, wherein coating has a Shore hardness of greater than 88 ShA.

13. The method of claim 6, wherein a layer thickness of the coating is between 0.01 mm and 0.5 mm.

14. The method of claim 6, wherein a layer thickness of the coating is between 0.1 mm and 0.25 mm.

15. The method of claim 6, wherein the coating is applied by spraying.

16. The method of claim 6, wherein the coating is applied by brushing.

17. The method of claim 6, wherein the coating is applied by rolling.

18. The method of claim 6, wherein the coating is applied by immersion.

19. The method of claim 6, further comprising drying the coating.

20. The method of claim 19, further comprising applying another coating after drying the coating.

Description

DESCRIPTION OF THE DRAWINGS

[0029] An exemplary embodiment of the invention is described below with reference to a schematic drawing, but the invention is by no means limited to this exemplary embodiment. In this drawing:

[0030] FIG. 1 shows a belt in the form of a flat belt with a belt core and a belt cover, which serves as a tension element for elevator systems, in cooperation with an unprofiled traction pulley.

DETAILED DESCRIPTION

[0031] FIG. 1 shows a belt 16 in the form of a flat belt that serves as a tension element for elevator systems. The material A is preferably a polyurethane and forms the belt body or core 18. The cover or coating 19 consists of a material B, preferably a PU varnish that can be subjected to high mechanical stresses. In this case, the tension member 17 is completely encased in the first material A and thereby embedded in the belt core 18. The tension member 17 preferably consists of a tension member of steel. In this particularly preferred embodiment, the coating 19 completely surrounds the belt core 18.

[0032] In accordance with the provisions of the patent statutes, the present invention has been described in what is considered to represent its preferred embodiment. However, it should be noted that the invention can be practiced otherwise than as specifically illustrated and described without departing from its spirit or scope.