Patent ID: 9314992
Filing Date: 2016-04-19
CPC Classification: B32B,B64C,Y10T

Claim Text:
1. 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.