Composite layer material for dampening external load, obtaining process, and uses thereof

Patent metadata

Field	Value
Publication number	US-10443678-B2
Application number	US-201515514991-A
Country	US
Kind code	B2
Filing date	Sep 25, 2015
Priority date	Sep 29, 2014
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

The present disclosure relates to the customization of a composite layer material for absorbing or dissipating mechanical energy under impacts or vibrations. The composite layer material comprises at least a support layer of a resilient material, said support layer having recessed fluid-tight microchannels comprising a fluid, wherein the channel section and fluid viscosity is such to dampen the external load by the constricted fluid flow through said microchannels. Therefore, the present disclosure relates to a maximization of safety and/or comfort.

First claim

The invention claimed is:

1. A composite layer material for dampening external dynamic load, comprising: at least a support layer of a resilient material, the support layer having recessed fluid-tight microchannels comprising a fluid, wherein the microchannel section and fluid viscosity dampens the external dynamic load by constricted fluid flow through the microchannels, wherein the at least one support layer comprises an impermeable resilient solid material selected from the group consisting of: cork, expanded polystyrene, expanded polypropylene, ethylene vinyl acetate, and combinations thereof.

2. The composite layer material according to claim 1 , wherein the fluid is a shear thickening fluid, a viscoelastic fluid, or a combination thereof.

3. The composite layer material according to claim 1 , wherein the microchannels are interconnected.

4. The composite layer material according to claim 1 , wherein the support layer further comprises recessed fluid-tight pockets interconnected with the microchannels.

5. The composite layer material according to claim 4 , further comprising a second layer over the microchannels and/or pockets for retention of the fluid.

6. The composite layer material according to claim 1 , wherein the microchannels extend in two planar directions of the support layer.

7. The composite layer material according to claim 1 , comprising a plurality of support layers.

8. The composite layer material according to claim 1 , wherein the microchannels are either engraved microchannels, carved microchannels, or stamped microchannels.

9. The composite layer material according to claim 1 , wherein the microchannels comprise a depth between 0.01 a 10 mm.

10. The composite layer material according to claim 1 , wherein the microchannels comprise a width between 0.01 a 10 mm.

11. The composite layer material according to claim 1 , wherein the fluid has a viscosity is between 10 −3 and 10 4 Pa s at 20° C.

12. The composite layer material according to claim 1 , wherein the fluid has a density between 800 and 2000 kg/m 3 at 20° C.

13. The composite layer material according claim 1 , wherein the fluid is a shear thickening fluid and wherein the shear thickening fluid is selected from the group of: concentrated dispersions of: corn starch, precipitated calcium carbonate, aerosil, fumed silica, silica, and mixtures thereof.

14. The composite layer material according to claim 1 , wherein the fluid is a viscoelastic fluid and wherein the viscoelastic fluid is selected from the group of: concentrated solutions of: polyacrylamide, polyethylene oxide, polyisobutylene, and mixtures thereof.

15. The composite layer material according to claim 1 , wherein the support layer comprises a thickness between 1 a 10 mm.

16. The composite layer material according to claim 1 , further comprising a second layer having a thickness between 0.1 a 10 mm.

17. The composite layer material according to claim 1 , further comprising a second layer over the support layer, wherein the second layer comprises an adhesive.

18. A composite layer material for dampening external dynamic load, comprising: at least a support layer of a resilient material, the support layer having recessed fluid-tight microchannels comprising a fluid, wherein the microchannel section and fluid viscosity dampens the external dynamic load by constricted fluid flow through the microchannels, wherein the resilient material is an agglomerated material.

19. The composite layer material according to claim 18 , wherein the agglomerated material comprises cork having a granule size between 0.1 a 5 mm.

Assignees

• Univ Do Porto

Inventors

• Galindo Rosales Francisco José
• Campo Deaño Laura

Classifications

• A42B3/121

  with at least one layer or pad containing a fluid · CPC title

• F16F15/023 Primary

  using fluid means · CPC title

• F16F9/30

  with solid or semi-solid material, e.g. pasty masses, as damping medium {(in devices where rotary elements are damped by viscous shear effect only, any throttling effect being immaterial F16F9/12; where members moving with a rotating system are being damped F16F15/16)} · CPC title

• F16F9/003

  Dampers characterised by having pressure absorbing means other than gas, e.g. sponge rubber · CPC title

• F16F2224/041

  Dilatant · CPC title