Multi-composite planar reinforcement

Patent metadata

Field	Value
Publication number	US-10994573-B2
Application number	US-201615577414-A
Country	US
Kind code	B2
Filing date	May 27, 2016
Priority date	May 28, 2015
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A flat reinforcer has the shape of a multicomposite strip defining three main perpendicular directions, the axial direction (X), the transverse direction (Y) and the radial direction (Z), having a width W R measured along the Y direction of between 2 and 100 mm and having a thickness T R measured along the Z direction of between 0.1 and 5 mm, the aspect ratio W R /T R being greater than 3. The multicomposite strip comprises at least a plurality of monofilaments made of composite material, orientated along the X direction, comprising filaments of a mineral material ( 101 ) embedded in a thermoset resin ( 102 ), the glass transition temperature of which, denoted Tg 1 , is greater than 70° C. The plurality of monofilaments are coated in a layer of thermoplastic material ( 12 ); and all or some of these monofilaments are flat, of cross section having a width W M measured along the Y direction and having a thickness T M measured along the Z direction, with an aspect ratio W M /T M greater than 1.5.

First claim

The invention claimed is:

1. A flat reinforcer having the shape of a multicomposite strip defining three main perpendicular directions, the axial direction X, the transverse direction Y and the radial direction Z, having a width W R measured along the Y direction of between 2 and 100 mm and having a thickness T R measured along the Z direction of between 0.1 and 5 mm, the aspect ratio W R /T R being greater than 10,
wherein the multicomposite strip comprises at least a plurality of monofilaments made of composite material, orientated along the X direction, comprising filaments of a mineral material embedded in a thermoset resin, the glass transition temperature T g1 of which is greater than 70° C.;
wherein the plurality of monofilaments are coated in a layer of thermoplastic material;
wherein all or some of the monofilaments are flat, having a width W M measured along the Y direction and having a thickness T M measured along the Z direction, with an aspect ratio W M /T M greater than 1.5; and
wherein the average distance d separating one of the flat monofilaments from another of the monofilaments along the Y direction is such that the ratio d/W M is between 0.1 and 3.0.

2. The flat reinforcer according to claim 1 , wherein T g1 is greater than 100° C.

3. The flat reinforcer according to claim 2 , wherein T g1 is greater than 150° C.

4. The flat reinforcer according to claim 3 , wherein T g is greater than 170° C.

5. The flat reinforcer according to claim 4 , wherein T g1 is equal to or greater than 190° C.

6. The flat reinforcer according to claim 1 , wherein a glass transition temperature T g2 of the thermoplastic material is greater than −30° C.

7. The flat reinforcer according to claim 6 , wherein T g2 is greater than 20° C.

8. The flat reinforcer according to claim 7 , wherein T g2 is greater than 50° C.

9. The flat reinforcer according to claim 8 , wherein T g2 is greater than 70° C.

10. The flat reinforcer according to claim 1 , wherein the elongation at break Ar of the multicomposite strip, measured at 20° C., is equal to or greater than 3.0%.

11. The flat reinforcer according to claim 10 , wherein the Ar, measured at 20° C., is equal to or greater than 3.5%.

12. The flat reinforcer according to claim 1 , wherein the longitudinal tensile modulus E RL20 of the multicomposite strip, measured at 20° C., is greater than 10 GPa.

13. The flat reinforcer according to claim 12 , wherein the E RL20 , measured at 20° C., is between 12 and 20 GPa.

14. The flat reinforcer according to claim 1 , wherein the transverse tensile modulus E RT20 of the multicomposite strip, measured at 20° C., is greater than 300 MPa.

15. The flat reinforcer according to claim 14 , wherein the E RT20 , measured at 20° C., is between 300 and 3000 MPa.

16. The flat reinforcer according to claim 14 , wherein the E RT20 , measured at 20° C., is greater than 1000 MPa.

17. The flat reinforcer according to claim 16 , wherein the E RT20 , measured at 20° C., is, preferably between 1000 and 3000 MPa.

18. The flat reinforcer according to claim 1 , wherein the initial tensile modulus E M20 of each monofilament, measured at 20° C., is greater than 30 GPa.

19. The flat reinforcer according to claim 18 , wherein the E M20 , measured at 20° C., is, greater than 35 GPa.

20. The flat reinforcer according to claim 1 , wherein the real part of the complex modulus denoted E′ M150 of each monofilament, measured at 150° C. by the DMTA method, is greater than 25 GPa.

21. The flat reinforcer according to claim 20 , wherein the E′ M150 , measured at 150° C. by the DMTA method, is greater than 30 GPa.

22. The flat reinforcer according to claim 1 , wherein the compressive elastic deformation in bending of each monofilament is greater than 3.0%.

23. The flat reinforcer according to claim 22 , wherein the compressive elastic deformation in bending of each monofilament is greater than 3.5%.

24. The flat reinforcer according to claim 1 , wherein the compressive breaking stress in bending of each monofilament is greater than 1000 MPa.

25. The flat reinforcer according to claim 24 , wherein the compressive breaking stress in bending of each monofilament is greater than 1200 MPa.

26. The flat reinforcer according to claim 1 , wherein the weight content of filaments, in each monofilament, is between 60 and 80%.

27. The flat reinforcer according to claim 26 , wherein the weight content of filaments, in each monofilament, is between 65 and 75%.

28. The flat reinforcer according to claim 1 , wherein the width W M of each flat monofilament is between 0.1 and 30 mm.

29. The flat reinforcer according to claim 28 , wherein the width W M of each flat monofilament is between 0.2 and 20 mm.

30. The flat reinforcer according to claim 1 , wherein the thickness T M of each flat monofilament is between 0.05 and 3.0 mm.

31. The flat reinforcer according to claim 30 , wherein the thickness T M of each flat monofilament is between 0.1 and 2.5 mm.

32. The flat reinforcer according to claim 1 , wherein the aspect ratio W M /T M of each flat monofilament is greater than 2.

33. The flat reinforcer according to claim 32 , wherein the aspect ratio W M /T M of each flat monofilament is greater than 3.

34. The flat reinforcer according to claim 1 , wherein the average distance d separating one of the flat monofilaments from another of the monofilaments along the Y direction is such that the ratio d/W M is between 0.2 and 2.

35. The flat reinforcer according to claim 1 , wherein the number of monofilaments is within a range from 2 to 40.

36. The flat reinforcer according to claim 35 , wherein the number of monofilaments is within a range from 3 to 30.

37. The flat reinforcer according to claim 1 , wherein all of the monofilaments are flat monofilaments with an aspect ratio W M /T M greater than 1.5.

38. The flat reinforcer according to claim 36 , wherein all of the monofilaments are flat monofilaments with an aspect ratio W M /T M greater than 2.0.

39. The flat reinforcer according to claim 1 , wherein the mineral material is selected from the group consisting of glass, carbon, boron and ceramic.

40. The flat reinforcer according to claim 39 , wherein the mineral material is glass.

41. The flat reinforcer according to claim 1 , wherein the thermoset resin is a polyester or vinyl ester resin.

42. The flat reinforcer according to claim 41 , wherein the thermoset rein is a vinyl ester resin.

43. The flat reinforcer according to claim 1 , wherein the initial tensile modulus of the thermoset resin, measured at 20° C., is greater than 3.0 GPa.

44. The flat reinforcer according to claim 43 , wherein the initial tensile modulus of the thermoset resin, measured at 20° C., is greater than 3.5 GPa.

45. The flat reinforcer according to claim 1 , wherein the thermoplastic material is a polymer or a polymer composition.

46. The flat reinforcer according to claim 45 , wherein the polymer is selected from the group consisting of polyamides, polyesters, polyimides and mixtur

Assignees

• Michelin & Cie

Inventors

• Delfino Antonio

Classifications

• B60C9/0028 Primary

  Reinforcements comprising mineral fibres, e.g. glass or carbon fibres · CPC title

• C03C25/50

  Coatings containing organic materials only · CPC title

• D10B2101/10

  based on non-oxides other than metals · CPC title

• D10B2101/08

  Ceramic · CPC title

• B29C70/20

  oriented in a single direction, e.g. roofing or other parallel fibres {(B29C70/083, B29C70/226 take precedence)} · CPC title