High-permeability composite prepreg constructions and methods for making the same

Patent metadata

Field	Value
Publication number	US-12269191-B2
Application number	US-202318383240-A
Country	US
Kind code	B2
Filing date	Oct 24, 2023
Priority date	Jan 5, 2017
Publication date	Apr 8, 2025
Grant date	Apr 8, 2025

Abstract

Methods, apparatuses, and systems for making prepregs are disclosed. A method may include depositing a resin material onto a surface of a fiber bed and forming a number of discrete resin regions thereon. A distance between the resin regions may be measured to provide desired exposed portions of the surface to facilitate permeation of air through the exposed portions of the surface in a direction perpendicular to a plane of the fiber bed during a curing process of the prepreg.

First claim

What is claimed is:

1. A prepreg construction comprising;
a fiber bed having a surface; and
a resin material disposed onto the surface, the resin material having one or more openings free of the resin material that that expose portions of the underlying fiber bed surface, wherein the resin material and one or more openings are configured to facilitate permeation of air through the exposed portions of the fiber bed surface in a direction perpendicular to a plane of the fiber bed during a curing process of the prepreg.

2. The prepreg construction of claim 1 , wherein the resin material is in the form of resin layer disposed on one or both of a top surface and a bottom surface of the fiber bed.

3. The prepreg construction of claim 1 , wherein the resin material forms an outermost surface of the prepreg construction.

4. The prepreg construction of claim 1 , wherein the resin material is in the form of a perforated film.

5. The prepreg construction of claim 1 , wherein the fiber bed is at least partially impregnated with the resin material.

6. The prepreg construction of claim 1 , wherein the fiber bed is a unidirectional fiber bed.

7. The prepreg construction of claim 1 , wherein the fiber bed is a woven fabric bed.

8. The prepreg construction of claim 1 , wherein the resin material is continuous.

9. The prepreg construction of claim 1 , wherein the resin material comprises a plurality of openings.

10. The prepreg construction of claim 9 , wherein the openings are arranged in an ordered pattern.

11. The prepreg construction of claim 10 , wherein the openings are arranged in a grid.

12. The prepreg construction of claim 9 , wherein the openings are randomly arranged.

13. A method for making a prepreg comprising depositing a resin material onto a surface of a fiber bed, the resin material having one or more openings free of the resin material that that expose portions of the underlying fiber bed surface, wherein the resin material and one or more openings are configured to facilitate permeation of air through the exposed portions of the fiber bed surface in a direction perpendicular to a plane of the fiber bed during a curing process of the prepreg.

14. The method of claim 13 , wherein during the step of depositing, the resin material is deposited onto opposed surfaces of the fiber bed.

15. The method of claim 13 , wherein the one or more openings in the resin material are present before the step of depositing the resin material onto the surface.

16. The method of claim 13 , wherein the step of depositing comprises applying a printing surface comprising the resin material to the surface of the fiber bed.

17. The method of claim 13 , wherein the step of depositing comprises transferring the resin material in the form of a film layer onto the surface.

18. The method of claim 13 , comprising de-wetting the resin material prior to the resin material being deposited onto the surface of the fiber bed.

19. The method of claim 13 , wherein after the step of depositing, the fiber bed is at least partially impregnated with the resin material.

20. A composite part made from the prepreg of claim 13 by subjecting the prepreg to vacuum curing at elevated temperature conditions, wherein air passes through the prepreg via permeation in the direction perpendicular to the plane of the fiber bed through the exposed portions of the surface existing by the one or more openings in the resin material.

Assignees

• Univ Southern California

Inventors

• Nutt Steven
• Grunenfelder Lessa
• Centea Timotei
• Anders Mark
• Edwards William Thomas
• Schechter Sarah Grace Katz

Classifications

• B32B3/10

  characterised by a discontinuous layer, i.e. formed of separate pieces of material · CPC title

• C08J2379/08

  Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title

• C08J2375/04

  Polyurethanes · CPC title

• C08J2363/00

  Characterised by the use of epoxy resins; Derivatives of epoxy resins · CPC title

• C08J2361/10

  Phenol-formaldehyde condensates · CPC title