Northrop Grumman Systems Corporation

Other

Benjamin S Wong

Carl Andrew Reis

Ernie Robert Silva

Jerry Wynn Brimer

James A Kirk

William K Oehlert

William K Oehlert, Deceased

A method of rendering a surface of a metal substrate substantially acid impervious. The method includes first placing the surface in a field of treatment, then depositing a mixture of a high-temperature resistant polymer particulate such as polyamide particulate and a curable powder adhesive on the surface, and finally subjecting the surface-coated metal substrate to a curing treatment sufficient to cure the powder adhesive and thereby adhere the polymer particulate as a film on the surface. A steel substrate coated in accord with the present methodology is particularly useful as a curing fixture upon which resin-impregnated fiber of polymer composite material is placed to thereby give molded parts made therefrom a desired shape. Production of a part is accomplished by vacuum bagging the composite material to the steel fixture and curing the so-produced part in place on the fixture in an autoclave at an elevated temperature. In this manner the acid impervious curing fixture allows production of composite parts without the danger of leaching iron from the fixture to thus assure full-utility part fabrication.

Acid impervious coated metal substrate surface and method of production

A cured composite material formed in accordance with the method of the present invention. The method initially providing for providing a peel-ply sheet which defines opposed planar faces. A multitude of elongate bond fibers are embedded into the peel-ply sheet in a manner wherein a majority of the bond fibers do not extend in co-planar relation to the planar faces of the peel-ply sheet. A resin composite material is provided. The peel-ply sheet is applied to the resin composite material such that the bond fibers are partially embedded therein. The resin composite material is cured. The peel-ply sheet is removed from the cured resin composite material such that the bond fibers remain implanted therein.

Cured composite material formed utilizing Z-peel sheets

In accordance with the present invention, there is provided a method of increasing the surface bond strength characteristics of a resin composite material. The method begins with providing a peel-ply sheet which defines opposed planar faces. A multitude of elongate bond fibers are embedded into the peel-ply sheet in a manner in which a majority of the bond fibers do not extend in co-planar relation to the planar faces of the peel-ply sheet. A resin composite material is provided. The peel-ply sheet is applied to the resin composite material such that the bond fibers are partially embedded therein. The resin composite material is cured. The peel-ply sheet is removed from the cured resin composite material such that the bond fibers remain implanted therein.

Z-peel sheets

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Diamond Bar, CA, United States of America

Benjamin S Wong