Distortion resistant transparent reinforcing fibers for use in transparent reinforced composites

Patent metadata

Field	Value
Publication number	US-9334378-B2
Application number	US-1522108-A
Country	US
Kind code	B2
Filing date	Jan 16, 2008
Priority date	Jan 11, 2008
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

A reinforcing fiber for reinforcing a transparent matrix composite. The fiber includes a substantially transparent fiber ribbon having an elongated cross-sectional geometry. The fiber ribbon includes edges that are substantially opaque. Light is substantially prevented from passing through the opaque edges to reduce or eliminate light distortion through the fiber. A composite utilizing the reinforcing fibers and a method for making a window assembly and a method for manufacturing a vehicle are also disclosed.

First claim

The invention claimed is:

1. A reinforcing fiber ribbon for reinforcing a transparent matrix composite, the reinforcing fiber ribbon comprising:
a transparent portion having a refractive index;
a first flattened surface through which light incident in a first direction enters the transparent portion of the fiber and refracts, thereby changing its direction;
a second flattened surface, differing from the first flattened surface, through which light exits the transparent portion of the fiber ribbon and refracts a second time thereby changing its direction a second time to the first direction; and
opaque edge portions extending between and connecting the first flattened surface and the second flattened surface,
wherein the fiber ribbon has an elongated cross-section and the transparent portion forms the longer dimension thereof; and
wherein light entering the first flattened surface is prevented from passing through the opaque edge portions.

2. The fiber ribbon of claim 1 , wherein the fiber ribbon has a rectangular geometry.

3. The fiber ribbon of claim 1 , wherein the opaque edge portions are fabricated from an opaque material.

4. The fiber ribbon of claim 1 , wherein the opaque edge portions are coated with an opaque material.

5. A transparent reinforced matrix composite comprising:
a transparent matrix material;
a plurality of reinforcing fiber ribbons disposed in the transparent matrix material, the fiber ribbons having an elongated cross-section and a transparent portion forming the longer dimension thereof and the transparent portion having a refractive index, the fiber ribbons comprising a first flattened surface through which light incident in a first direction enters the transparent portion of the fiber ribbons and refracts, thereby changing its direction, a second flattened surface, differing from the first flattened surface, through which light exits the transparent portion of the fiber ribbons and refracts a second time thereby changing its direction a second time to the first direction, and opaque edge portions extending between and connecting the first flattened surface and the second flattened surface; and
wherein light entering the first flattened surface is prevented from passing through the opaque edge portions.

6. The composite of claim 5 , wherein the fiber ribbon has a rectangular geometry.

7. The composite of claim 5 , wherein the opaque edge portions are fabricated from an opaque material.

8. The composite of claim 5 , wherein the opaque edge portions are coated with an opaque material.

9. The composite of claim 5 , wherein the transparent matrix material is a polymer.

10. The composite of claim 5 , wherein the transparent matrix material is selected from the group consisting of poly(methyl methacrylate), polycarbonate, polyetherimide, bismaleimide and epoxy.

11. The composite of claim 5 , wherein light distortion through the matrix composite is substantially eliminated.

12. The composite of claim 5 , wherein the transparent reinforced matrix composite is configured into a window assembly.

13. The composite of claim 12 , wherein the window assembly includes a window for an aircraft.

14. The composite of claim 12 , wherein the window assembly includes a window for an architectural structure.

15. The composite of claim 5 , wherein the transparent reinforced matrix composite is configured into a transparent shield.

16. A method for fabricating a window assembly comprising:
providing a plurality of reinforcing fiber ribbons, the fiber ribbons having an elongated cross-section section and a transparent portion forming the longer dimension thereof and the transparent portion having a refractive index, the fiber ribbons comprising a first flattened surface through which light incident in a first direction enters the transparent portion of the fiber ribbons and refracts, thereby changing its direction; a second flattened surface, differing from the first flattened surface, through which light exits the transparent portion of the fiber ribbons and refracts a second time thereby changing its direction a second time to the first direction, and opaque edge portions extending between and connecting the first flattened surface and the second flattened surface,
wherein light is prevented from passing through the opaque edge portions;
arranging and disposing the plurality of reinforcing fiber ribbons into a transparent matrix;
curing the matrix to form a transparent reinforced matrix composite; and
assembling the reinforced matrix composite into a window assembly.

17. The method of claim 16 , wherein the fiber ribbons have a rectangular geometry.

18. The method of claim 16 , wherein the opaque edge portions are fabricated from an opaque material.

19. The method of claim 16 , wherein the opaque edge portions are coated with an opaque material.

20. The method of claim 19 wherein the opaque material is opaque glass.

21. The method of claim 16 , wherein the transparent matrix material is a polymer.

22. The method of claim 16 , wherein light distortion through the matrix is substantially eliminated.

23. A method of manufacturing a vehicle comprising:
providing a vehicle;
providing a transparent reinforced composite window assembly comprising:
a transparent matrix material; and
a plurality of reinforcing fiber ribbons disposed in the transparent matrix material, the fiber ribbons having an elongated cross-section and a transparent portion forming the longer dimension thereof and the transparent portion having a refractive index, the fiber ribbons comprising a first flattened surface through which light incident in a first direction enters transparent portion of the fiber ribbons and refracts, thereby changing its direction; a second flattened surface, differing from the first flattened surface, through which light exits the transparent portion of the fiber ribbons and refracts a second time thereby changing its direction a second time to the first direction, and opaque edge portions extending between and connecting the first flattened surface and the second flattened surface,
wherein light is prevented from passing through the opaque edge portions; and assembling the window assembly into the vehicle.

24. The method of claim 23 , wherein the vehicle is an aircraft.

25. The method of claim 23 , wherein the vehicle is an armored vehicle.

26. The fiber ribbon of claim 1 , wherein the opaque edge portions are substantially perpendicular to the first flattened surface.

27. The composite of claim 5 , wherein the opaque edge portions are substantially perpendicular to the first flattened surface.

Assignees

• Lang Adam J
• Wilenski Mark S
• Markus Alan M
• Godby Larry A
• Boeing Co

Inventors

• Lang Adam J
• Wilenski Mark S
• Markus Alan M
• Godby Larry A

Classifications

• Y10T428/24124

  Fibers · CPC title

• C08J5/043 Primary

  with glass fibres · CPC title

• F41H5/0407

  Transparent bullet-proof laminates}{informative reference: layered products essentially comprising glass in general B32B17/06, e.g. B32B17/10009; manufacture or composition of glass, e.g. joining glass to glass C03; permanent multiple-glazing windows, e.g. with spacing therebetween, E06B3/66 · CPC title

• D06M23/16

  Processes for the non-uniform application of treating agents, e.g. one-sided treatment; Differential treatment · CPC title

• B64C1/1492

  Structure and mounting of the transparent elements in the window or windscreen · CPC title