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1. (WO2019002147) MATÉRIAU DE FRICTION POUR DISPOSITIF DE FRICTION À SEC
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

1. A friction material (10) for a dry friction device, the friction material comprising: - friction material powder waste (12),

- rubber (14),

- metal addition,

binded with a thermoset resin (16).

2. The friction material according to claim 1, wherein the friction material powder waste has a median diameter smaller than or equal to 200μιη.

3. The friction material according to claim 1 or 2, wherein at least 90% in mass proportion of the friction material powder waste has a diameter smaller than or equal to 0.8 mm.

4. The friction material according to any of the preceding claims, wherein the friction material powder waste comprises between 30%> and 60%> of mass proportion of organic content.

5. The friction material according to any of the preceding claims, wherein the friction material powder waste provides from friction material manufacturing process, for example drilling and/or grinding.

6. The friction material according to any of the preceding claims, wherein the friction material powder waste represents a mass proportion greater than or equal to 15% and smaller than or equal to 60% of the overall friction material.

7. The friction material according to any of the preceding claims, wherein the rubber is rubber powder.

8. The friction material according to any of the preceding claims, wherein the rubber represents a mass proportion greater than or equal to 2 % and smaller than or equal to

20% of the overall friction material.

9. The friction material according to any of the preceding claims, wherein the friction material is asbestos-free.

10. Friction lining for clutches comprising friction material according to any of the preceding claims.

11. A rotatable clutch friction disc having at least a friction lining according to claim 10.

12. A method for producing a friction material, the method comprising:

- a mixing step (SI) during which friction material powder waste, rubber and metal addition are mixed with a thermoset resin,

- a curing step (S2) during which the mixture issued of the mixing step is cured between 1 and 15 minutes at a temperature greater than or equal to 160°C and smaller than or equal to 210°C under a pressure greater than or equal to 50 bars and smaller than or equal to 300 bars so as to obtain a crosslinked friction material.

13. The method according to claim 12, wherein the friction material powder waste provided during the mixing step has a median diameter smaller than or equal to 200μιη.

14. The method according to claim 12 or 13, wherein at least 90% in mass proportion of the friction material powder waste provided during the mixing step has a diameter smaller than or equal to 0.8 mm.

15. The method according to any of claims 12 to 14, wherein the friction material powder waste provided during the mixing step comprises between 30% and 60%> of mass proportion of organic content.

16. The method according to any of claims 12 to 15, wherein the friction material powder waste represents a mass proportion greater than or equal to 15% and smaller than or equal to 60% of the overall material provided during the mixing step.

17. The method according to any of claims 12 to 16, wherein the uncured thermoset resin represents a mass proportion greater than or equal to 20% and smaller than or equal to 40% of the overall material provided during the mixing step.

18. The method according to any of claims 12 to 17, wherein the rubber is rubber powder.

19. The method according to any of claims 12 to 18, wherein the rubber represents a mass proportion greater than or equal to 2 % and smaller than or equal to 20% of the overall material provided during the mixing step.