Composite article with lightning strike protection and method and release film for forming same

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Parten, C., inventors; Wichita State University, assignee. Composite article with lightning strike protection and method and release film for forming same. United States patent US 11820916 B2. 2023, November 21.
Abstract

A composite article includes a lightning strike protection coating on a composite substrate. The lightning strike protection coating is formed from electrically conductive material and includes protrusions spaced along the length and width of a portion of the substrate surface. To form the lightning strike protection coating, a form is pressed against electrically conductive coating material on the composite substrate while the electrically conductive coating material is flowable. For example, the form can be a release film used in a composite vacuum bagging process. Suitable release film can have depressions along an inner surface that define an imprint of the coating protrusions. After curing, the coating can be covered with a layer of paint that conceals the protrusions but still allows lightning streamers to penetrate the paint at the protrusions.

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WSU inventors: Clay Parten, NIAR
Application No: 17/331831 filed May 27, 2021. Patent No: US 11820916 B2 granted November 21, 2023.
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United States Patent and Trademark Office
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