Component having vibration-damping properties, mixture for manufacturing the component, and method of manufacturing such a component

• US 20040219351A1
• Filed: 05/27/2004
• Published: 11/04/2004
• Est. Priority Date: 02/02/2001
• Status: Abandoned Application

• Current Assignee: Ingo Borchers, Josef Michel, Jurgen Schnur, Martin Hartweg, Ping Wang, Rolf-Dirc Roitzheim, Silvia Tomaschko
• Original Assignee: Ingo Borchers, Josef Michel, Jurgen Schnur, Martin Hartweg, Ping Wang, Rolf-Dirc Roitzheim, Silvia Tomaschko
• Inventors: Schnur, Jurgen, Wang, Ping, Hartweg, Martin, Borchers, Ingo, Michel, Josef, Tomaschko, Silvia, Roitzheim, Rolf-Dirc
• Application Number:
  US10/855,125
• Publication Number:
  US 20040219351A1
• Time in Patent Office: Days
• US Class Current: 428/323
• CPC Class Codes: B29C 70/58 comprising fillers only , e.g. particles, powder, beads, flakes, spheres B29C70/025 takes precedence, agglomerating hollow spheres to produce synthetic foam B29C70/66; compounding ingredients per se C08K
• CPC Class Codes: B29L 2031/721 Vibration dampening equipment, e.g. shock absorbers bumpers B29L2031/3044, springs B29L2031/774
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 2307/56 Damping, energy absorption
• CPC Class Codes: B32B 2605/00 Vehicles
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: G01N 29/2475 Embedded probes, i.e. probes incorporated in objects to be inspected
• CPC Class Codes: G10K 11/165 Particles in a matrix
• CPC Class Codes: G10K 11/168 Plural layers of different materials, e.g. sandwiches
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles

Abstract

In a component having vibration-damping properties, a mixture for manufacturing the component, and a method of manufacturing such a component, the component has granular and/or grain- and/or flake-shaped piezoelectric particles which are embedded in a polymer matrix in a proportion of at least 10 volume %. In order to improve the damping effect, at least some of the piezoelectric particles have a polarization which is different from zero.

Claims

1. to 21. (Canceled).

22. A mixture for manufacturing a component having vibration-damping properties using a molding method for components made of plastic, the component including at least one of granular, grain-shaped and flake-shaped piezoelectric particles embedded in at least one matrix polymer forming a matrix in a level of at least 10 volume %, wherein, after the matrix polymer has set, at least some of the piezoelectric particles have a particle polarization other than a zero particle polarization, comprising:

at least one of the matrix polymer and precursors of the matrix polymer; and

the piezoelectric particles mixed with the at least one of the matrix polymer and the precursors of the matrix polymer.

23. The mixture according to claim 22, wherein the molding method includes at least one of injection molding and pressing.

24. The mixture according to claim 22, wherein at least some of the piezoelectric particles include a particle polarization other than zero in the mixture.

39. The mixture according to claim 22, wherein the piezoelectric particles are prepolarized.

25. A method of manufacturing a component having vibration-damping properties, the component including at least one of granular, grain-shaped and flake-shaped piezoelectric particles embedded in at least one matrix polymer forming a matrix in a level of at least 10 volume %, wherein, after the matrix polymer has set, at least some of the piezoelectric particles have a particle polarization other than a zero particle polarization, comprising the steps of:

forming a particle-containing mixture from at least one of the matrix polymer and precursors of the matrix polymer and from the piezoelectric particles, the piezoelectric particles including particle polarizations different from zero;

molding the component from the mixture using a molding method for components made of plastic; and

crosslinking the polymer matrix.

26. The method according to claim 25, wherein the molding method includes at least one of injection molding and pressing.

27. The method according to claim 25, wherein the at least one of the matrix polymer and the precursors of the matrix polymer and the piezoelectric particles are mixed in the forming step in an intimate manner.

40. The method according to claim 25, wherein the piezoelectric particles are prepolarized.

28. A method of manufacturing a component having vibration-damping properties, the component including at least one of granular, grain-shaped and flake-shaped piezoelectric particles embedded in at least one matrix polymer forming a matrix in a level of at least 10 volume %, wherein, after the matrix polymer has set, at least some of the piezoelectric particles have a particle polarization other than a zero particle polarization, comprising the steps of:

forming a particle-containing mixture from at least one of the matrix polymer and precursors of the matrix polymer and from the piezoelectric particles;

molding the component from the mixture using a molding method for components made of plastic;

crosslinking the polymer matrix; and

providing the piezoelectric particles with a particle polarization other than zero at least one of during and after the crosslinking step.

29. The method according to claim 28, wherein the at least one of the matrix polymer and precursors of the matrix polymer and the piezoelectric particles are intimately mixed in the forming step.

30. The method according to claim 28, wherein the molding method includes at least one of injection molding and pressing.

41. The method according to claim 28, wherein the piezoelectric particles are prepolarized.

31. A method of manufacturing a component having vibration-damping properties, the component including at least one of granular, grain-shaped and flake-shaped piezoelectric particles embedded in at least one matrix polymer forming a matrix in a level of at least 10 volume %, wherein, after the matrix polymer has set, at least some of the piezoelectric particles have a particle polarization other than a zero particle polarization, comprising the steps of:

manufacturing a particle-containing blank from at least one of the matrix polymer and precursors of the matrix polymer and the piezoelectric particles using a molding method for components made of plastic; and

orienting the particle polarization of at least some piezoelectric particles at least before the matrix polymer is completely crosslinked.

32. The method according to claim 31, wherein the molding method includes at least one of injection molding and pressing.

42. The method according to claim 31, wherein the piezoelectric particles are prepolarized.

33. A method of manufacturing a component using an application method, the component having vibration-damping properties and including at least one of granular, grain-shaped and flake-shaped piezoelectric particles embedded in at least one matrix polymer forming a matrix in a level of at least 10 volume %, wherein, after the matrix polymer has set, at least some of the piezoelectric particles have a particle polarization other than a zero particle polarization, comprising the steps of:

forming a mixture from at least one of the matrix polymer and precursors of the matrix polymer and the piezoelectric particles;

adding piezoelectric particles having a particle polarization which is different from zero form the mixture;

molding the component from the mixture using a molding method for components made of plastic; and

crosslinking the polymer matrix.

34. The method according to claim 33, wherein the application method includes spraying.

35. The method according to claim 33, wherein the at least one of the matrix polymer and precursors of the matrix polymer and the piezoelectric particles are intimately mixed in the forming step.

36. The method according to claim 33, wherein the molding method includes at least one of injection molding and pressing.

43. The method according to claim 33, wherein the piezoelectric particles are prepolarized.

37. A method of manufacturing a component having vibration-damping properties, the component including at least one of granular, grain-shaped and flake-shaped piezoelectric particles embedded in at least one matrix polymer forming a matrix in a level of at least 10 volume %, wherein, after the matrix polymer has set, at least some of the piezoelectric particles have a particle polarization other than a zero particle polarization, comprising the steps of:

forming a mixture from at least one of the matrix polymer and precursors of the matrix polymer and the piezoelectric particles;

introducing the mixture into a molding tool; and

orienting the particle polarization of at least some piezoelectric particles at least one of during the introduction of the mixture and during crosslinking of the matrix polymer.

38. The method according to claim 37, wherein the at least one of the matrix polymer and precursors of the matrix polymer and the piezoelectric particles are intimately mixed in the forming step.