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US 9,314,992 B2Granted
Sandwich panels
AssigneeHexcel Composites Limited
InventorsSteve Mortimer, Emille Legoff, Bertrand Germain, Clement Casaliggi, Sarah Lasfargues
Life of this patent
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Abstract
A structural panel comprising an internal core material having first and second opposing faces, first and second face sheets bonded to the first and second opposing faces respectively, wherein the panel comprises an open-structured sheet, interposed between a first face of the core material and its respective face sheet and the panel comprises less than 200 gsm adhesive.
Claims14
An uncured structural sandwich panel comprising:
- a honeycomb core having first and second opposing faces;
- a first prepreg face sheet that is located next to the first face of said honeycomb core, said first prepreg sheet comprising carbon fibers and an uncured thermosetting resin comprising epoxy resin, polyethersulphone and a curing agent for said epoxy resin wherein the amount of uncured thermosetting resin in said first prepreg face sheet is equal to at least 44 weight percent, based on the total weight of said first prepreg face sheet;
- and
- a first open-structured sheet that is interposed between the first face of said honeycomb core and said first prepreg face sheet, said first open-structured sheet weighing from 10 to 30 grams per square meter and consisting of polyethylene terephthalate.
1 more element
Dependencies are inferred from the claim text.